Java最全文件操作实例汇总

2024-03-25 13:10:03 142

本文实例汇总了Java文件操作。分享给大家供大家参考，具体如下：

1.创建文件夹

//importjava.io.*;
FilemyFolderPath=newFile(%%1);
try{
if(!myFolderPath.exists()){
myFolderPath.mkdir();
}
}
catch(Exceptione){
System.out.println("新建目录操作出错");
e.printStackTrace();
}

2.创建文件

//importjava.io.*;
FilemyFilePath=newFile(%%1);
try{
if(!myFilePath.exists()){
myFilePath.createNewFile();
}
FileWriterresultFile=newFileWriter(myFilePath);
PrintWritermyFile=newPrintWriter(resultFile);
myFile.println(%%2);
resultFile.close();
}
catch(Exceptione){
System.out.println("新建文件操作出错");
e.printStackTrace();
}

3.删除文件

//importjava.io.*;
FilemyDelFile=newFile(%%1);
try{
myDelFile.delete();
}
catch(Exceptione){
System.out.println("删除文件操作出错");
e.printStackTrace();
}

4.删除文件夹

//importjava.io.*;
FiledelFolderPath=newFile(%%1);
try{
delFolderPath.delete();//删除空文件夹
}
catch(Exceptione){
System.out.println("删除文件夹操作出错");
e.printStackTrace();
}

5.删除一个文件下夹所有的文件夹

//importjava.io.*;
Filedelfile=newFile(%%1);
File[]files=delfile.listFiles();
for(inti=0;i<files.length;i++){
if(files[i].isDirectory()){
files[i].delete();
}
}

6.清空文件夹

//importjava.io.*;
Filedelfilefolder=newFile(%%1);
try{
if(!delfilefolder.exists()){
delfilefolder.delete();
}
delfilefolder.mkdir();
}
catch(Exceptione){
System.out.println("清空目录操作出错");
e.printStackTrace();
}

7.读取文件

//importjava.io.*;
//逐行读取数据
FileReaderfr=newFileReader(%%1);
BufferedReaderbr=newBufferedReader(fr);
String%%2=br.readLine();
while(%%2!=null){
%%3
%%2=br.readLine();
}
br.close();
fr.close();

8.写入文件

//importjava.io.*;
//将数据写入文件
try{
FileWriterfw=newFileWriter(%%1);
fw.write(%%2);
fw.flush();
fw.close();
}catch(IOExceptione){
e.printStackTrace();
}

9.写入随机文件

//importjava.io.*;
try{
RandomAcessFilelogFile=newRandomAcessFile(%%1,"rw");
longlg=logFile.length();
logFile.seek(%%2);
logFile.writeByte(%%3);
}catch(IOExceptionioe){
System.out.println("无法写入文件："+ioe.getMessage());
}

10.读取文件属性

//importjava.io.*;
//文件属性的取得
Fileaf=newFile(%%1);
if(af.exists()){
System.out.println(f.getName()+"的属性如下：文件长度为："+f.length());
System.out.println(f.isFile()?"是文件":"不是文件");
System.out.println(f.isDirectory()?"是目录":"不是目录");
System.out.println(f.canRead()?"可读取":"不");
System.out.println(f.canWrite()?"是隐藏文件":"");
System.out.println("文件夹的最后修改日期为："+newDate(f.lastModified()));
}else{
System.out.println(f.getName()+"的属性如下：");
System.out.println(f.isFile()?"是文件":"不是文件");
System.out.println(f.isDirectory()?"是目录":"不是目录");
System.out.println(f.canRead()?"可读取":"不");
System.out.println(f.canWrite()?"是隐藏文件":"");
System.out.println("文件的最后修改日期为："+newDate(f.lastModified()));
}
if(f.canRead()){
%%2
}
if(f.canWrite()){
%%3
}

11.写入属性

//importjava.io.*;
Filefilereadonly=newFile(%%1);
try{
booleanb=filereadonly.setReadOnly();
}
catch(Exceptione){
System.out.println("拒绝写访问："+e.printStackTrace());
}

12.枚举一个文件夹中的所有文件

//importjava.io.*;
//importjava.util.*;
LinkedList<String>folderList=newLinkedList<String>();
folderList.add(%%1);
while(folderList.size()>0){
Filefile=newFile(folderList.peek());
folderList.removeLast();
File[]files=file.listFiles();
ArrayList<File>fileList=newArrayList<File>();
for(inti=0;i<files.length;i++){
if(files[i].isDirectory()){
folderList.add(files[i].getPath());
}else{
fileList.add(files[i]);
}
}
for(Filef:fileList){
%%2=f.getAbsoluteFile();
%%3
}
}

13.复制文件夹

//importjava.io.*;
//importjava.util.*;
LinkedList<String>folderList=newLinkedList<String>();
folderList.add(%%1);
LinkedList<String>folderList2=newLinkedList<String>();
folderList2.add(%%2+%%1.substring(%%1.lastIndexOf("//")));
while(folderList.size()>0){
(newFile(folderList2.peek())).mkdirs();//如果文件夹不存在则建立新文件夹
Filefolders=newFile(folderList.peek());
String[]file=folders.list();
Filetemp=null;
try{
for(inti=0;i<file.length;i++){
if(folderList.peek().endsWith(File.separator)){
temp=newFile(folderList.peek()+File.separator
+file[i]);
}else{
temp=newFile(folderList.peek()+File.separator
+file[i]);
}
if(temp.isFile()){
FileInputStreaminput=newFileInputStream(temp);
FileOutputStreamoutput=newFileOutputStream(
folderList2.peek()+File.separator
+(temp.getName()).toString());
byte[]b=newbyte[5120];
intlen;
while((len=input.read(b))!=-1){
output.write(b,0,len);
}
output.flush();
output.close();
input.close();
}
if(temp.isDirectory()){//如果是子文件夹
for(Filef:temp.listFiles()){
if(f.isDirectory()){
folderList.add(f.getPath());
folderList2.add(folderList2.peek()
+File.separator+f.getName());
}
}
}
}
}catch(Exceptione){
//System.out.println("复制整个文件夹内容操作出错");
e.printStackTrace();
}
folderList.removeFirst();
folderList2.removeFirst();
}

14.复制一个文件夹下所有的文件夹到另一个文件夹下

//importjava.io.*;
//importjava.util.*;
Filecopyfolders=newFile(%%1);
File[]copyfoldersList=copyfolders.listFiles();
for(intk=0;k<copyfoldersList.length;k++){
if(copyfoldersList[k].isDirectory()){
ArrayList<String>folderList=newArrayList<String>();
folderList.add(copyfoldersList[k].getPath());
ArrayList<String>folderList2=newArrayList<String>();
folderList2.add(%%2+"/"+copyfoldersList[k].getName());
for(intj=0;j<folderList.length;j++){
(newFile(folderList2.get(j))).mkdirs();//如果文件夹不存在则建立新文件夹
Filefolders=newFile(folderList.get(j));
String[]file=folders.list();
Filetemp=null;
try{
for(inti=0;i<file.length;i++){
if(folderList.get(j).endsWith(File.separator)){
temp=newFile(folderList.get(j)+"/"+file[i]);
}
else{
temp=newFile(folderList.get(j)+"/"+File.separator+file[i]);
}
FileInputStreaminput=newFileInputStream(temp);
if(temp.isFile()){
FileInputStreaminput=newFileInputStream(temp);
FileOutputStreamoutput=newFileOutputStream(folderList2.get(j)+"/"+
(temp.getName()).toString());
byte[]b=newbyte[5120];
intlen;
while((len=input.read(b))!=-1){
output.write(b,0,len);
}
output.flush();
output.close();
input.close();
}
if(temp.isDirectory()){//如果是子文件夹
folderList.add(folderList.get(j)+"/"+file[i]);
folderList2.add(folderList2.get(j)+"/"+file[i]);
}
}
}
catch(Exceptione){
System.out.println("复制整个文件夹内容操作出错");
e.printStackTrace();
}
}
}
}

15.移动文件夹

//importjava.io.*;
//importjava.util.*;
LinkedList<String>folderList=newLinkedList<String>();
folderList.add(%%1);
LinkedList<String>folderList2=newLinkedList<String>();
folderList2.add(%%2+%%1.substring(%%1.lastIndexOf("//")));
while(folderList.size()>0){
(newFile(folderList2.peek())).mkdirs();//如果文件夹不存在则建立新文件夹
Filefolders=newFile(folderList.peek());
String[]file=folders.list();
Filetemp=null;
try{
for(inti=0;i<file.length;i++){
if(folderList.peek().endsWith(File.separator)){
temp=newFile(folderList.peek()+File.separator
+file[i]);
}else{
temp=newFile(folderList.peek()+File.separator
+file[i]);
}
if(temp.isFile()){
FileInputStreaminput=newFileInputStream(temp);
FileOutputStreamoutput=newFileOutputStream(
folderList2.peek()+File.separator
+(temp.getName()).toString());
byte[]b=newbyte[5120];
intlen;
while((len=input.read(b))!=-1){
output.write(b,0,len);
}
output.flush();
output.close();
input.close();
if(!temp.delete())
System.out.println("删除单个文件操作出错!");
}
if(temp.isDirectory()){//如果是子文件夹
for(Filef:temp.listFiles()){
if(f.isDirectory()){
folderList.add(f.getPath());
folderList2.add(folderList2.peek()
+File.separator+f.getName());
}
}
}
}
}catch(Exceptione){
//System.out.println("复制整个文件夹内容操作出错");
e.printStackTrace();
}
folderList.removeFirst();
folderList2.removeFirst();
}
Filef=newFile(%%1);
if(!f.delete()){
for(Filefile:f.listFiles()){
if(file.list().length==0){
System.out.println(file.getPath());
file.delete();
}
}
}

16.移动一个文件夹下所有的文件夹到另一个目录下

//importjava.io.*;
//importjava.util.*;
Filemovefolders=newFile(%%1);
File[]movefoldersList=movefolders.listFiles();
for(intk=0;k<movefoldersList.length;k++){
if(movefoldersList[k].isDirectory()){
ArrayList<String>folderList=newArrayList<String>();
folderList.add(movefoldersList[k].getPath());
ArrayList<String>folderList2=newArrayList<String>();
folderList2.add(%%2+"/"+movefoldersList[k].getName());
for(intj=0;j<folderList.length;j++){
(newFile(folderList2.get(j))).mkdirs();//如果文件夹不存在则建立新文件夹
Filefolders=newFile(folderList.get(j));
String[]file=folders.list();
Filetemp=null;
try{
for(inti=0;i<file.length;i++){
if(folderList.get(j).endsWith(File.separator)){
temp=newFile(folderList.get(j)+"/"+file[i]);
}
else{
temp=newFile(folderList.get(j)+"/"+File.separator+file[i]);
}
FileInputStreaminput=newFileInputStream(temp);
if(temp.isFile()){
FileInputStreaminput=newFileInputStream(temp);
FileOutputStreamoutput=newFileOutputStream(folderList2.get(j)+"/"+
(temp.getName()).toString());
byte[]b=newbyte[5120];
intlen;
while((len=input.read(b))!=-1){
output.write(b,0,len);
}
output.flush();
output.close();
input.close();
temp.delete();
}
if(temp.isDirectory()){//如果是子文件夹
folderList.add(folderList.get(j)+"/"+file[i]);
folderList2.add(folderList2.get(j)+"/"+file[i]);
}
}
}
catch(Exceptione){
System.out.println("复制整个文件夹内容操作出错");
e.printStackTrace();
}
}
movefoldersList[k].delete();
}
}

17.以一个文件夹的框架在另一个目录创建文件夹和空文件

//importjava.io.*;
//importjava.util.*;
booleanb=false;//不创建空文件
ArrayList<String>folderList=newArrayList<String>();
folderList.add(%%1);
ArrayList<String>folderList2=newArrayList<String>();
folderList2.add(%%2);
for(intj=0;j<folderList.length;j++){
(newFile(folderList2.get(j))).mkdirs();//如果文件夹不存在则建立新文件夹
Filefolders=newFile(folderList.get(j));
String[]file=folders.list();
Filetemp=null;
try{
for(inti=0;i<file.length;i++){
if(folderList.get(j).endsWith(File.separator)){
temp=newFile(folderList.get(j)+"/"+file[i]);
}
else{
temp=newFile(folderList.get(j)+"/"+File.separator+file[i]);
}
FileInputStreaminput=newFileInputStream(temp);
if(temp.isFile()){
if(b)temp.createNewFile();
}
if(temp.isDirectory()){//如果是子文件夹
folderList.add(folderList.get(j)+"/"+file[i]);
folderList2.add(folderList2.get(j)+"/"+file[i]);
}
}
}
catch(Exceptione){
System.out.println("复制整个文件夹内容操作出错");
e.printStackTrace();
}
}

18.复制文件

//importjava.io.*;
intbytesum=0;
intbyteread=0;
Fileoldfile=newFile(%%1);
try{
if(oldfile.exists()){//文件存在时
FileInputStreaminStream=newFileInputStream(oldfile);//读入原文件
FileOutputStreamfs=newFileOutputStream(newFile(%%2,oldfile.getName()));
byte[]buffer=newbyte[5120];
intlength;
while((byteread=inStream.read(buffer))!=-1){
bytesum+=byteread;//字节数文件大小
System.out.println(bytesum);
fs.write(buffer,0,byteread);
}
inStream.close();
}
}
catch(Exceptione){
System.out.println("复制单个文件操作出错");
e.printStackTrace();
}

19.复制一个文件夹下所有的文件到另一个目录

//importjava.io.*;
Filecopyfiles=newFile(%%1);
File[]files=copyfiles.listFiles();
for(inti=0;i<files.length;i++){
if(!files[i].isDirectory()){
intbytesum=0;
intbyteread=0;
try{
InputStreaminStream=newFileInputStream(files[i]);//读入原文件
FileOutputStreamfs=newFileOutputStream(newFile(%%2,files[i].getName());
byte[]buffer=newbyte[5120];
intlength;
while((byteread=inStream.read(buffer))!=-1){
bytesum+=byteread;//字节数文件大小
System.out.println(bytesum);
fs.write(buffer,0,byteread);
}
inStream.close();
}catch(Exceptione){
System.out.println("复制单个文件操作出错");
e.printStackTrace();
}
}
}

20.提取扩展名

String%%2=%%1.substring(%%1.lastIndexOf(".")+1);

21.提取文件名

String%%2=%%1.substring(%%1.lastIndexOf("//")+1);

22.提取文件路径

String%%2=%%1.substring(0,%%1.lastIndexOf("//"));

23.替换扩展名

//importjava.io.*;
FilereplaceExt=newFile(%%1);
replaceExt.renameTo(replaceExt.getName().split(".")[0]+"."+%%2);

24.追加路径

finalStringpath=%%1.endsWith("//")?%%1:%%1+"//";
%%3=path+%%2;

25.移动文件

//importjava.io.*;
intbytesum=0;
intbyteread=0;
Fileoldfile=newFile(%%1);
try{
if(oldfile.exists()){//文件存在时
InputStreaminStream=newFileInputStream(oldfile);//读入原文件
FileOutputStreamfs=newFileOutputStream(newFile(%%2,oldfile.getName()));
byte[]buffer=newbyte[5120];
intlength;
while((byteread=inStream.read(buffer))!=-1){
bytesum+=byteread;//字节数文件大小
//System.out.println(bytesum);
fs.write(buffer,0,byteread);
}
inStream.close();
oldfile.delete();
}
}
catch(Exceptione){
System.out.println("复制单个文件操作出错");
e.printStackTrace();
}

26.移动一个文件夹下所有文件到另一个目录

//importjava.io.*;
Filemovefile=newFile(%%1);
File[]movefiles=movefile.listFiles();
for(inti=0;i<movefiles.length;i++){
if(movefiles[i].isFile()){
intbytesum=0;
intbyteread=0;
Fileoldfile=newFile(movefiles[i]);
try{
if(oldfile.exists()){//文件存在时
InputStreaminStream=newFileInputStream(oldfile);//读入原文件
FileOutputStreamfs=newFileOutputStream(newFile(%%2,oldfile.getName()));
byte[]buffer=newbyte[5120];
intlength;
while((byteread=inStream.read(buffer))!=-1){
bytesum+=byteread;//字节数文件大小
//System.out.println(bytesum);
fs.write(buffer,0,byteread);
}
inStream.close();
oldfile.delete();
}
}
catch(Exceptione){
System.out.println("复制单个文件操作出错");
e.printStackTrace();
}
}
}

27.指定目录下搜索文件

//importjava.io.*;
Stringfilter="*.*";
Stringpath=%%1;
Filefile=newFile(path);
if(file.exists()){
if(file.isDirectory()){
File[]fileArray=file.listFiles();
for(Filef:fileArray){
if(f.isDirectory()){
doSearch(filter,f.getPath());
}else{
if(f.getName().indexOf(filter)>=0){
countFiles++;
result.append(f.getPath()+"/r/n");
}
}
statusShow1.setText(f.getPath());
}
statusShow2.setText("Thenumbersoffileshadbeenfound:"+countFiles);
}else{
System.out.println("Couldn'topenthepath!");
}
}else{
System.out.println("ThepathhadbeenapointedwasnotExist!");
}

28.打开对话框

//importjava.io.*;
//importjavax.swing.*;
JFileChooserJfc=newJFileChooser();//建立选择档案对话方块盒Jfc
if(Jfc.isFileSelectionEnabled()){
File%%1=Jfc.getSelectedFile();
}

29.文件分割

//importjava.io.*
try{
Filef=newFile(%%1);
FileInputStreamfileInputStream=newFileInputStream(f);
byte[]buffer=newbyte[fileInputStream.available()];
FileInputStream.read(buffer);
fileInputStream.close();
StringstrFileName=f.getName();
FileOutputStreamfileOutputStream=newFileOutputStream(newFile(%%2+"//"+strFileName+"1"));
fileOutputStream.write(buffer,0,buffer.length/2);
fileOutputStream.close();
fileOutputStream=newFileOutputStream(newFile(%%2+"//"+strFileName+"2"));
fileOutputStream.write(buffer,buffer.length/2,buffer.length-buffer.length/2);
fileOutputStream.close();
}catch(ArrayIndexOutOfBoundsExceptione){
System.out.print("usingFileStreamDemosrcdes");
e.printStackTrace();
}
catch(IOExceptione){
e.printStackTrace();
}

30.文件合并

//importjava.io.*
StringstrFileName=%%1.substring(%%1.LastIndexOf("//")+1);
try{
FileInputStreamfileInputStream1=newFileInputStream(newFile(%%2+strFileName+"1"));
FileInputStreamfileInputStream2=newFileInputStream(newFile(%%2+strFileName+"2"));
byte[]buffer=newbyte[fileInputStream1.available()+fileInputStream2.available()];
FileInputStream.read(buffer,0,fileInputStream1.available());
FileInputStream2.read(buffer,fileInputStream1.available(),fileInputStream2.available());
fileInputStream.close();
fileInputStream2.close();
FileOutputStreamfileOutputStream=newFileOutputStream(newFile(%%2+"//"+strFileName));
fileOutputStream.write(buffer,0,buffer.length);
fileOutputStream.close();
catch(IOExceptione){
e.printStackTrace();
}

31.文件简单加密

//importjava.io.*
try{
Filef=newFile((newFile(%%1)).getPath()+"//enc_"+(newFile(%%1)).getName().split("//")[1]);
StringstrFileName=f.getName();
FileInputStreamfileInputStream=newFileInputStream(%%2+"//"+strFilename);
byte[]buffer=newbyte[fileInputStream.available()];
FileInputStream.read(buffer);
fileInputStream.close();
for(inti=0;i<buffer.length;i++)
{
intibt=buffer[i];
ibt+=100;
ibt%=256;
buffer[i]=(byte)ibt;
}
FileOutputStreamfileOutputStream=newFileOutputStream(f);
fileOutputStream.write(buffer,0,buffer.length);
fileOutputStream.close();
}
catch(ArrayIndexOutOfBoundExceptione){
e.printStackTrace();
}
catch(IOExceptione){
e.printStackTrace();
}

32.文件简单解密

//importjava.io.*
try{
Filef=newFile(%%1);
StringstrFileName=f.getName();
FileInputStreamfileInputStream=newFileInputStream(%%2+"//enc_"+strFilename);
byte[]buffer=newbyte[fileInputStream.available()];
FileInputStream.read(buffer);
fileInputStream.close();
for(inti=0;i<buffer.length;i++)
{
intibt=buffer[i];
ibt-=100;
ibt+=256;
ibt%=256;
buffer[i]=(byte)ibt;
}
FileOutputStreamfileOutputStream=newFileOutputStream(f);
fileOutputStream.write(buffer,0,buffer.length);
fileOutputStream.close();
}
catch(ArrayIndexOutOfBoundExceptione){
e.printStackTrace();
}
catch(IOExceptione){
e.printStackTrace();
}

33.写入ini文件属性

//importjava.io.*;
//importjava.util.*;
//importjava.util.regex.*;
if(configMap==null){
StringWriteBuffer="";
configMap=newHashMap<String,Serializable>();
StringstrLine=null;
StringcurrentNode=null;
StringpreviousNode=null;
Vector<Properties>vec=newVector<Properties>();
introw=0;
FileReaderfileReader=null;
try{
fileReader=newFileReader("Config.ini");
}catch(FileNotFoundExceptione1){
e1.printStackTrace();
}
BufferedReaderbufferedReader=newBufferedReader(fileReader);
try{
while((strLine=bufferedReader.readLine())!=null){
StringoneLine=strLine.trim();
if(oneLine.length()>=1){
Patternp=Pattern.compile("//[//s*.*//s*//]");
intnodelen=oneLine.split("[;]").length;
String[]strArray1=newString[4];
if(nodelen==1){
oneLine=oneLine.split("[;]")[0].trim();
}elseif(nodelen==2){
strArray1[3]=oneLine.split("[;]")[1].trim();
oneLine=oneLine.split("[;]")[0].trim();
}
Matcherm=p.matcher(oneLine);
if(m.matches()){
strArray1[0]="@Node";
strArray1[1]=oneLine;
strArray1[2]="";
}else{
intkeylen=oneLine.split("=").length;
if(keylen==1){
strArray1[0]="@Key";
strArray1[1]=oneLine.split("=")[0];
strArray1[2]="";
}elseif(keylen==2){
strArray1[0]="@Key";
strArray1[1]=oneLine.split("=")[0];
strArray1[2]=oneLine.split("=")[1];
}else{
strArray1[0]="@ElementError";
strArray1[1]="";
strArray1[2]="";
strArray1[3]="";
}
}
if(strArray1[0].equals("@Node")){
previousNode=currentNode;
currentNode=strArray1[1];
if(row>0){
configMap.put(previousNode,vec.elementAt(0));
vec.clear();
row=0;
}
WriteBuffer+=(oneLine+"/r/n");
}elseif(strArray1[0].equals("@Key")&&row==0){
Propertiesht=newProperties();
ht.setProperty(strArray1[1],strArray1[2]);
if(strArray1[1].equals(%%1)){
WriteBuffer+=(%%1+"="+%%2+"/r/n");
}else
WriteBuffer+=(oneLine+"/r/n");
vec.add(0,ht);
row++;
}elseif(strArray1[0].equals("@Key")&&row>0){
Propertiesht2=newProperties();
ht2.put(strArray1[1],strArray1[2]);
vec.clear();
vec.add(0,ht2);
WriteBuffer+=(oneLine+"/r/n");
row++;
}
}
}
configMap.put(currentNode,vec.elementAt(0));
}catch(FileNotFoundExceptione){
configMap=null;
e.printStackTrace();
}catch(IOExceptione){
configMap=null;
e.printStackTrace();
}finally{
vec.clear();
try{
bufferedReader.close();
fileReader.close();
}catch(IOExceptione){
e.printStackTrace();
}
try{
FileWriterfw=newFileWriter("Config.ini");
fw.write(WriteBuffer);
fw.flush();
fw.close();
}catch(IOExceptione){
e.printStackTrace();
}
}
}

34.读取ini文件属性

//importjava.io.*;
//importjava.util.*;
//importjava.util.regex.*;
//privateHashMapconfigMap=null;
privateMap<String,Serializable>configMap=null;
String%%2=null;
if(configMap==null){
configMap=newHashMap<String,Serializable>();
StringstrLine=null;
StringcurrentNode=null;
StringpreviousNode=null;
Vector<Properties>vec=newVector<Properties>();
introw=0;
FileReaderfileReader=null;
try{
fileReader=newFileReader("Config.ini");
}catch(FileNotFoundExceptione1){
e1.printStackTrace();
}
BufferedReaderbufferedReader=newBufferedReader(fileReader);
try{
while((strLine=bufferedReader.readLine())!=null){
StringoneLine=strLine.trim();
if(oneLine.length()>=1){
Patternp=Pattern.compile("//[//s*.*//s*//]");
intnodelen=oneLine.split("[;]").length;
String[]strArray1=newString[4];
if(nodelen==1){
oneLine=oneLine.split("[;]")[0].trim();
}elseif(nodelen==2){
strArray1[3]=oneLine.split("[;]")[1].trim();
oneLine=oneLine.split("[;]")[0].trim();
}
Matcherm=p.matcher(oneLine);
if(m.matches()){
strArray1[0]="@Node";
strArray1[1]=oneLine;
strArray1[2]="";
}else{
intkeylen=oneLine.split("=").length;
if(keylen==1){
strArray1[0]="@Key";
strArray1[1]=oneLine.split("=")[0];
strArray1[2]="";
}elseif(keylen==2){
strArray1[0]="@Key";
strArray1[1]=oneLine.split("=")[0];
strArray1[2]=oneLine.split("=")[1];
}else{
strArray1[0]="@ElementError";
strArray1[1]="";
strArray1[2]="";
strArray1[3]="";
}
}
if(strArray1[0].equals("@Node")){
previousNode=currentNode;
currentNode=strArray1[1];
if(row>0){
configMap.put(previousNode,vec.elementAt(0));
vec.clear();
row=0;
}
}elseif(strArray1[0].equals("@Key")&&row==0){
Propertiesht=newProperties();
ht.setProperty(strArray1[1],strArray1[2]);
if(strArray1[1].equals(%%1))
{
%%2=strArray1[2];
return;
}
vec.add(0,ht);
row++;
}elseif(strArray1[0].equals("@Key")&&row>0){
Propertiesht2=newProperties();
ht2.put(strArray1[1],strArray1[2]);
vec.clear();
vec.add(0,ht2);
row++;
}
}
}
configMap.put(currentNode,vec.elementAt(0));
}catch(FileNotFoundExceptione){
configMap=null;
e.printStackTrace();
}catch(IOExceptione){
configMap=null;
e.printStackTrace();
}finally{
vec.clear();
try{
bufferedReader.close();
fileReader.close();
}catch(IOExceptione){
e.printStackTrace();
}
}
}

35.合并一个文件下所有的文件

Filecombinefiles=newFile(%%1);
File[]files=combinefiles.listFiles();
FileOutputStreamfs;
try{
fs=newFileOutputStream(newFile(%%2));
}
catch(IOExceptione){
e.printStackTrace();
}
for(inti=0;i<files.length;i++){
if(files[i].isFile()){
intbytesum=0;
intbyteread=0;
try{
FileInputStreaminStream=newFileInputStream(files[i]);
byte[]buffer=newbyte[5120];
intlength;
while((byteread=inStream.read(buffer))!=-1){
bytesum+=byteread;
fs.write(buffer,0,byteread);
}
inStream.close();
}
catch(Exceptione){
//复制文件出错
e.printStackTrace();
}
}
}
try{
fs.close();
}
catch(IOExceptione){
{
e.printStackTrace();
}

36.写入ini文件属性

//importjava.io.*;
//importjava.util.*;
//importjava.util.regex.*;
//privateHashMapconfigMap=null;
privateMap<String,Serializable>configMap=null;
if(configMap==null){
StringstrLine=null;
StringcurrentNode=null;
StringpreviousNode=null;
Vector<Properties>vec=newVector<Properties>();
introw=0;
FileReaderfileReader=null;
try{
fileReader=newFileReader(%%1);
}catch(FileNotFoundExceptione1){
e1.printStackTrace();
}
BufferedReaderbufferedReader=newBufferedReader(fileReader);
try{
while((strLine=bufferedReader.readLine())!=null){
StringoneLine=strLine.trim();
if(oneLine.length()>=1){
Patternp=Pattern.compile("//[//s*.*//s*//]");
intnodelen=oneLine.split("[;]").length;
String[]strArray1=newString[4];
if(nodelen==1){
oneLine=oneLine.split("[;]")[0].trim();
}
elseif(nodelen==2){
strArray1[3]=oneLine.split("[;]")[1].trim();
oneLine=oneLine.split("[;]")[0].trim();
}
Matcherm=p.matcher(oneLine);
if(m.matches()){
strArray1[0]="@Node";
strArray1[1]=oneLine;
strArray1[2]="";
}else{
intkeylen=oneLine.split("=").length;
if(keylen==1){
strArray1[0]="@Key";
strArray1[1]=oneLine.split("=")[0];
strArray1[2]="";
}elseif(keylen==2){
strArray1[0]="@Key";
strArray1[1]=oneLine.split("=")[0];
strArray1[2]=oneLine.split("=")[1];
}else{
strArray1[0]="@ElementError";
strArray1[1]="";
strArray1[2]="";
strArray1[3]="";
}
}
if(strArray1[0].equals("@Node")){
previousNode=currentNode;
currentNode=strArray1[1];
if(row>0){
configMap.put(previousNode,vec.elementAt(0));
//"size:"+configMap.size()
vec.clear();
row=0;
}
}elseif(strArray1[0].equals("@Key")&&row==0){
Propertiesht=newProperties();
ht.setProperty(strArray1[1],strArray1[2]);
vec.add(0,ht);
row++;
}elseif(strArray1[0].equals("@Key")&&row>0){
Propertiesht2=newProperties();
ht2.put(strArray1[1],strArray1[2]);
vec.clear();
vec.add(0,ht2);
row++;
}
}
}
configMap.put(currentNode,vec.elementAt(0));
}catch(FileNotFoundExceptione){
configMap=null;
e.printStackTrace();
}catch(IOExceptione){
configMap=null;
e.printStackTrace();
}finally{
vec.clear();
try{
bufferedReader.close();
fileReader.close();
}catch(IOExceptione){
e.printStackTrace();
}
}
}
StringnodeKey="["+%%2+"]";
Propertiesht=null;
if(configMap.containsKey(nodeKey)){
ht=(Properties)configMap.get(nodeKey);
}else{
ht=(Properties)configMap.put(nodeKey,%%3);
}
try{
ht.setProperty(%%3,%%4);
}catch(NullPointExceptione){
e.printStackTrace();
}
FileWriterfw=null;
BufferedWriterbw=null;
try{
fw=newFileWriter(%%1);
bw=newBufferedWriter(fw);
}catch(IOExceptione){
e.printStackTrace();
}
Setkeys=configMap.keySet();
Iteratorite=keys.iterator();
while(ite.hasNext()){
StringoneKey=(String)ite.next();
try{
bw.write(oneKey+"/n");
}catch(IOExceptione){
e.printStackTrace();
}
ht=(Properties)configMap.get(oneKey);
ht.list(newPrintWriter(bw,true));
}

37.获得当前路径

String%%1=this.getClass().getResource("/").getPath();

38.读取XML数据库

//importjava.io.*;
//importjavax.xml.parsers.*;
//importorg.xml.sax.*;
//importorg.w3c.dom.*;
privateDocumentdocument;
Filexml_file=newFile(%%1);
DocumentBuilderFactoryfactory=DocumentBuilderFactory.newInstance();
try{
DocumentBuilderbuilder=factory.newDocumentBuilder();
document=builder.parse(xml_file);
}catch(Exceptione){
e.printStackTrace();
}
StringsubNodeTag=%%2;
ElementrootNode=document.getDocumentElement();
//%%2="serverList"//%%4="id"//%%6="port"
//%%3="server"//%%5="ipaddr"
NodeListnlist=rootNode.getElementsByTagName(subNodeTag);
intlen=nlist.getLength();
Nodex=null;
for(inti=0;i<len;i++){
x=nlist.item(i);
StringgetNodeAttrValue=null;
NamedNodeMapattrList=node.getAttributes();
for(intj=0;j<attrList.getLength();j++){
if(attrList.item(j).getNodeName().compareTo(%%7)==0){
getNodeAttrValue=attrList.item(j).getNodeValue();
break;
}
}
if(getNodeAttrValue.compareTo(%%8)==0)
break;
}
String%%9=null;
if(x!=null){
NodeListnlist=node.getChildNodes();
intlen=nlist.getLength();
NodecurrentNode;
StringnodeName;
for(inti=0;i<len;i++){
currentNode=nlist.item(i);
nodeName=currentNode.getNodeName();
if(nodeName.equals(%%5)==0){
%%9=document.getElementValue(currentNode);
break;
}
}
}

39.写入XML数据库

//importjava.io.*;
//importjavax.xml.parsers.*;
//importorg.xml.sax.*;
//importorg.w3c.dom.*;
//importjavax.xml.transform.*;
//importjavax.xml.transform.dom.*;
//importjavax.xml.transform.stream.*;
privateDocumentdocument;
privateElementnode;
Filexml_file=newFile(%%1);
DocumentBuilderFactoryfactory=DocumentBuilderFactory.newInstance();
try{
DocumentBuilderbuilder=factory.newDocumentBuilder();
document=builder.parse(xml_file);
}catch(Exceptione){
e.printStackTrace();
}
StringsubNodeTag=%%2;
ElementrootNode=document.getDocumentElement();
//%%2="serverList"//%%4="id"//%%6="port"
//%%3="server"//%%5="ipaddr"
NodeListnlist=rootNode.getElementByTagName(subNodeTag);
node=document.createElement(%%3);
node.setAttribute(%%4,nlist.getLength()+1).toString());
node.appendChild(document.createTextNode("/n");
ElementipNode=document.createElement(%%5);
ipNode.appendChild(document.createTextNode(%%8));
node.appendChild(ipNode);
node.appendChild(document,createTextNode("/n");
Elementport=document.createElement(%%6);
port.appendChild(document.createTextNode(%%9));
node.appendChild(port);
node.appendChild(document,createTextNode("/n");
nlist.appendChild(node);
TransformerFactorytFactory=TransformerFactory.newInstance();
Transformertransformer=null;
try{
transformer=tFactory.newTransformer();
DOMSourcesource=newDOMSource(document);
StreamResultresult=newStreamResult(xml_file);
transformer.transform(source,result);
}catch(Exceptione){
e.printStackTrace();
}

40.ZIP压缩文件

//importjava.io.*;
//importjava.util.zip.*;
//创建文件输入流对象
FileInputStreamfis=newFileInputStream(%%1);
//创建文件输出流对象
FileOutputStreamfos=newFileOutputStream(%%2);
//创建ZIP数据输出流对象
ZipOutputStreamzipOut=newZipOutputStream(fos);
//创建指向压缩原始文件的入口
ZipEntryentry=newZipEntry(args[0]);
zipOut.putNextEntry(entry);
//向压缩文件中输出数据
intnNumber;
byte[]buffer=newbyte[1024];
while((nNumber=fis.read(buffer))!=-1)
zipOut.write(buffer,0,nNumber);
//关闭创建的流对象
zipOut.close();
fos.close();
fis.close();
}
catch(IOExceptione)
{
System.out.println(e);
}

41.获得应用程序完整路径

String%%1=System.getProperty("user.dir");

42.ZIP解压缩

//importjava.io.*;
//importjava.util.zip.*;
try{
//创建文件输入流对象实例
FileInputStreamfis=newFileInputStream(%%1);
//创建ZIP压缩格式输入流对象实例
ZipInputStreamzipin=newZipInputStream(fis);
//创建文件输出流对象实例
FileOutputStreamfos=newFileOutputStream(%%2);
//获取Entry对象实例
ZipEntryentry=zipin.getNextEntry();
byte[]buffer=newbyte[1024];
intnNumber;
while((nNumber=zipin.read(buffer,0,buffer.length))!=-1)
fos.write(buffer,0,nNumber);
//关闭文件流对象
zipin.close();
fos.close();
fis.close();
}
catch(IOExceptione){
System.out.println(e);
}

43.递归删除目录中的文件

//importjava.io.*;
//importjava.util.*;
ArrayList<String>folderList=newArrayList<String>();
folderList.add(%%1);
for(intj=0;j<folderList.size();j++){
Filefile=newFile(folderList.get(j));
File[]files=file.listFiles();
ArrayList<File>fileList=newArrayList<File>();
for(inti=0;i<files.length;i++){
if(files[i].isDirectory()){
folderList.add(files[i].getPath());
}else{
fileList.add(files[i]);
}
}
for(Filef:fileList){
f.delete();
}
}

43.ZIP压缩文件夹

//importjava.io.*;
//importorg.apache.tools.zip.ZipOutputStream;
//这个包在ant.jar里，要到官方网下载
//importjava.util.zip.*;
try{
StringzipFileName=%%2;//打包后文件名字
Filef=newFile(%%1);
ZipOutputStreamout=newZipOutputStream(newFileOutputStream(zipFileName));
Stringbase="";
if(f.isDirectory()){
File[]fl=f.listFiles();
out.putNextEntry(neworg.apache.tools.zip.ZipEntry(base+"/"));
base=base.length()==0?"":base+"/";
for(inti=0;i<fl.length;i++){
zip(out,fl[i],base+fl[i].getName());
}
}else{
out.putNextEntry(neworg.apache.tools.zip.ZipEntry(base));
FileInputStreamin=newFileInputStream(f);
intb;
while((b=in.read())!=-1){
out.write(b);
}
in.close();
}
out.close();
}catch(Exceptionex){
ex.printStackTrace();
}

44.Java验证DTD

//importjava.io.*;
//importjavax.xml.parsers.*;
//importorg.xml.sax.*;
//importorg.w3c.dom.*;
try{
InputStreamin=newFileInputStream(filePath);
SAXReadersaxReader=newSAXReader();
this.document=saxReader.read(in);
DocumentBuilderFactoryfactory=null;
factory=DocumentBuilderFactory.newInstance();
//进行dtd检查
factory.setValidating(true);
}catch(Exceptione){
}

45.验证Schema

//importjava.io.*;
//importjavax.xml.parsers.*;
//importorg.xml.sax.*;
//importorg.w3c.dom.*;
StringxsdFileName=/"Q:////_dev_stu////xsdtest////src////note.xsd/";
try{
//创建默认的XML错误处理器
XMLErrorHandlererrorHandler=newXMLErrorHandler();
//获取基于SAX的解析器的实例
SAXParserFactoryfactory=SAXParserFactory.newInstance();
//解析器在解析时验证XML内容。
factory.setValidating(true);
//指定由此代码生成的解析器将提供对XML名称空间的支持。
factory.setNamespaceAware(true);
//使用当前配置的工厂参数创建SAXParser的一个新实例。
SAXParserparser=factory.newSAXParser();
//创建一个读取工具
SAXReaderxmlReader=newSAXReader();
//获取要校验xml文档实例
DocumentxmlDocument=(Document)xmlReader.read(newFile(xmlFileName));
//设置XMLReader的基础实现中的特定属性。核心功能和属性列表可以在http://sax.sourceforge.net/?selected=get-set中找到。
parser.setProperty(
/"http://java.sun.com/xml/jaxp/properties/schemaLanguage",
/"http://www.w3.org/2001/XMLSchema");
parser.setProperty(
/"http://java.sun.com/xml/jaxp/properties/schemaSource",
/"file:/"+xsdFileName);
//创建一个SAXValidator校验工具，并设置校验工具的属性
SAXValidatorvalidator=newSAXValidator(parser.getXMLReader());
//设置校验工具的错误处理器，当发生错误时，可以从处理器对象中得到错误信息。
validator.setErrorHandler(errorHandler);
//校验
validator.validate(xmlDocument);
XMLWriterwriter=newXMLWriter(OutputFormat.createPrettyPrint());
//如果错误信息不为空，说明校验失败，打印错误信息
if(errorHandler.getErrors().hasContent()){
System.out.println(/"XML文件通过XSD文件校验失败！/");
writer.write(errorHandler.getErrors());
}else{
System.out.println(/"Good!XML文件通过XSD文件校验成功！/");
}
}catch(Exceptionex){
System.out.println(/"XML文件:/"+xmlFileName+/"通过XSD文件:/"+xsdFileName+/"检验失败。/n原因：/"+ex.getMessage
());
ex.printStackTrace();
}
}

46.Grep

//importjava.util.regex.*;
//importjava.io.*;
/**
*Simpleimplementationoftheubiquitousgrepcommand.
*Firstargumentistheregularexpressiontosearchfor(rememberto
*quoteand/orescapeasappropriate).Allfollowingargumentsare
*filenamestoreadandsearchfortheregularexpression.
*
*Created:April,2002
*@authorRonHitchens(ron@ronsoft.com)
*@version$Id:SimpleGrep.java,v1.12002/05/0702:21:08ronExp$
*/
publicstaticvoidmain(String[]argv)
throwsException
{
if(argv.length<2){//如果参数行没有输入参数，结束程序
System.out.println("Usage:regexfile[...]");
return;
}
Patternpattern=Pattern.compile(argv[0]);//第一个参数为需要匹配的字符串
Matchermatcher=pattern.matcher("");
//一次读取各个文件
for(inti=1;i<argv.length;i++){
Stringfile=argv[i];//第2个参数开始，均为文件名。
BufferedReaderbr=null;
Stringline;
try{
br=newBufferedReader(newFileReader(file));//打开文件
}catch(IOExceptione){
//没有打开文件，则产生异常
System.err.println("Cannotread'"+file
+"':"+e.getMessage());
continue;
}
while((line=br.readLine())!=null){//读入一行，直到文件结束
matcher.reset(line);//匹配字符串
if(matcher.find()){//如果有匹配的字符串，则输出
System.out.println(file+":"+line);
}
}
br.close();//关闭文件
}
}

47.直接创建多级目录

//importjava.io.*;
Filef=newFile(%%1);
f.mkdirs();

48.批量重命名

//importjava.io.*;
Filetarget=newFile("%%1");
String[]files=target.list();
Filef=null;
Stringfilename=null;
for(Stringfile:files){
f=newFile(fl,file);
filename=f.getName();
if(filename.substring(filename.lastIndexOf
(".")).equalsIgnoreCase(
"%%2")){
f.renameTo(newFile(target.getAbsolutePath(),
filename.replace(
"%%2","%%3")));
//这里可以反复使用replace替换,当然也可以使用正则表达式来
//替换了".txt"".bat"
}
}

49.文本查找替换

//importjava.nio.*;
Strings1=%%1;
Strings2=%%2;
Strings3=%%3;
intpos=%%4;
/*变量i和j分别表示主串和模式串中当前字符串的位置，k表示匹配次数*/
inti,j,k=0;
i=pos;
j=0;
//将s1转化成StringBuffer型进行操作
repStr=newStringBuffer(s1);
while(i<repStr.length()&&j<s2.length())
{
if(repStr.charAt(i)==s2.charAt(j))
{
++i;++j;
if(j==s2.length())
{
/*j=s2.length()表示字符串匹配成功，匹配次数加1，此外对主串进行字符串替换*/
k=k+1;
repStr.replace(i-j,i,s3);
//将j进行重新赋值开始新的比较
j=0;
}
}
else{i=i-j+1;j=0;}
}
returnk;

50.文件关联

//importjava.io.*;
try{
Runtime.getRuntime().exec(%%1);//"assoc.txt=mynote""assoc[.ext[=[filetype]]]"
}catch(IOExceptione){
e.printStackTrace();
}

52.设置JDK环境变量

@echooff
IFEXIST%1/bin/java.exe(
rem如输入正确的Java2SDK安装目录，开始设置环境变量
@setxJAVA_HOME%1
@setxpath%path%;%JAVA_HOME%/bin
@setxclasspath%classpath%;.
@setxclasspath%classpath%;%JAVA_HOME%/lib/tools.jar
@setxclasspath%classpath%;%JAVA_HOME%/lib/dt.jar
@setxclasspath%classpath%;%JAVA_HOME%/jre/lib/rt.jar
@echoon
@echoJava2SDK环境参数设置完毕，正常退出。
)ELSE(
IF"%1"==""(
rem如没有提供安装目录，提示之后退出
@echoon
@echo没有提供Java2SDK的安装目录,不做任何设置，现在退出环境变量设置。
)ELSE(
rem如果提供非空的安装目录但没有bin/java.exe，则指定的目录为错误的目录
@echoon
@echo非法的Java2SDK的安装目录,不做任何设置，现在退出环境变量设置。
)
)
//http://sourceforge.net/projects/jregistrykey/
//importca.beq.util.win32.registry.*;
//importjava.util.*;

1.打开键

RegistryKeyr=newRegistryKey(RootKey.HKEY_LOCAL_MACHINE,
"SOFTWARE//Microsoft//Windows//CurrentVersion//Explorer//ShellFolders");

2.添加键

RegistryKeyr=newRegistryKey(RootKey.HKEY_CURRENT_USER,"Software//BEQ
Technologies");
r.create();

3.写入字符串值

RegistryKeyr=newRegistryKey(RootKey.HKEY_CURRENT_USER,"Software//BEQTechnologies");
RegistryValuev=newRegistryValue("myVal",ValueType.REG_SZ,"data");
r.setValue(v);

4.获取DWORD值

RegistryKeyr=newRegistryKey(RootKey.HKEY_CURRENT_USER,"Software//BEQTechnologies");
if(r.hasValue("myValue")){
RegistryValuev=r.getValue("myValue");
v.setType(ValueType.REG_DWORD);
}//if

53.选择文件夹对话框

/*
importjava.io.*;
importjavax.swing.*;
*/
JFileChooserchooser=newJFileChooser();
chooser.setCurrentDirectory(newFile("."));
chooser.setFileFilter(newjavax.swing.filechooser.FileFilter(){
publicbooleanaccept(Filef){
returnf.getName().toLowerCase().endsWith(".gif")
||f.isDirectory();
}
publicStringgetDescription(){
return"GIFImages";
}
});
intr=chooser.showOpenDialog(null);
if(r==JFileChooser.APPROVE_OPTION){
Stringname=chooser.getSelectedFile().getPath();
//label.setIcon(newImageIcon(name));
}

54.删除空文件夹

//importjava.io.*;
Filef=newFile(%%1);
if(isFolerNull(f)){
for(Filefile:f.listFiles()){
if(file.list().length==0){
System.out.println(file.getPath());
file.delete();
}
}
}

55.发送数据到剪贴板

//importjava.awt.*;
//importjava.awt.datatransfer.*;
Clipboardclipboard=Toolkit.getDefaultToolkit().getSystemClipboard();
TransferabletText=newStringSelection(%%1);
clipboard.setContents(tText,null);

56.从剪贴板中取数据

//importjava.awt.*;
//importjava.awt.datatransfer.*;
//取得系统剪贴板里可传输的数据构造的Java对象
Transferablet=Toolkit.getDefaultToolkit()
.getSystemClipboard().getContents(null);
try{
if(t!=null
&&t.isDataFlavorSupported(DataFlavor.stringFlavor)){
//因为原系的剪贴板里有多种信息,如文字,图片,文件等
//先判断开始取得的可传输的数据是不是文字,如果是,取得这些文字
Strings=(String)t
.getTransferData(DataFlavor.stringFlavor);
//同样,因为Transferable中的DataFlavor是多种类型的,
//所以传入DataFlavor这个参数,指定要取得哪种类型的Data.
System.out.println(s);
}
}catch(UnsupportedFlavorExceptionex){
ex.printStackTrace();
}catch(IOExceptionex){
ex.printStackTrace();
}

57.获取文件路径的父路径

String%%2=%%1.substring(0,%%1.lastIndexOf("//"));

58.创建快捷方式

//importjava.io.*;
try{
PrintWriterpw=newPrintWriter(newFileOutputStream("C:/a.bat"));
pw.println(%%1);"C:/a.txt"
pw.close();
}
catch(IOExceptione){
e.printStackTrace();
}

59.弹出快捷菜单

//MouseEvente
JPopupMenujpm=newJPopupMenu();
show(jpm,x,y);

60.文件夹复制到整合操作

/*
importjava.io.*;
importjava.util.*;
importjavax.swing.*;
*/
JFileChooserJfc=newJFileChooser("请选择源路径");//建立选择档案对话
//方块盒Jfc
if(!Jfc.isFileSelectionEnabled()){
return;
}
String%%1=Jfc.getSelectedFile().getParent();
Jfc=newJFileChooser("请选择目标路径");//建立选择档案对话方块盒Jfc
if(!Jfc.isFileSelectionEnabled()){
return;
}
String%%2=Jfc.getSelectedFile().getParent();
LinkedList<String>folderList=newLinkedList<String>();
folderList.add(%%1);
LinkedList<String>folderList2=newLinkedList<String>();
folderList2.add(%%2+%%1.substring(%%1.lastIndexOf("//")));
while(folderList.size()>0){
(newFile(folderList2.peek())).mkdirs();//如果文件夹不存在则建立新文件夹
Filefolders=newFile(folderList.peek());
String[]file=folders.list();
Filetemp=null;
try{
for(inti=0;i<file.length;i++){
if(folderList.peek().endsWith(File.separator)){
temp=newFile(folderList.peek()+File.separator
+file[i]);
}else{
temp=newFile(folderList.peek()+File.separator
+file[i]);
}
if(temp.isFile()){
FileInputStreaminput=newFileInputStream(temp);
FileOutputStreamoutput=newFileOutputStream(
folderList2.peek()+File.separator
+(temp.getName()).toString());
byte[]b=newbyte[5120];
intlen;
while((len=input.read(b))!=-1){
output.write(b,0,len);
}
output.flush();
output.close();
input.close();
}
if(temp.isDirectory()){//如果是子文件夹
for(Filef:temp.listFiles()){
if(f.isDirectory()){
folderList.add(f.getPath());
folderList2.add(folderList2.peek()
+File.separator+f.getName());
}
}
}
}
}catch(Exceptione){
//System.out.println("复制整个文件夹内容操作出错");
e.printStackTrace();
}
folderList.removeFirst();
folderList2.removeFirst();
}

61.文件夹移动到整合操作

/*
importjava.io.*;
importjava.util.*;
importjavax.swing.*;
*/
JFileChooserJfc=newJFileChooser("请选择源路径");//建立选择档案对话
//方块盒Jfc
if(!Jfc.isFileSelectionEnabled()){
return;
}
String%%1=Jfc.getSelectedFile().getParent();
Jfc=newJFileChooser("请选择目标路径");//建立选择档案对话方块盒Jfc
if(!Jfc.isFileSelectionEnabled()){
return;
}
String%%2=Jfc.getSelectedFile().getParent();

62.目录下所有文件夹复制到整合操作

/*
importjava.io.*;
importjava.util.*;
importjavax.swing.*;
*/
JFileChooserJfc=newJFileChooser("请选择源路径");
//建立选择档案对话
//方块盒Jfc
if(!Jfc.isFileSelectionEnabled()){
return;
}
String%%1=Jfc.getSelectedFile().getParent();
Jfc=newJFileChooser("请选择目标路径");//建立选择档案对话方块盒Jfc
if(!Jfc.isFileSelectionEnabled()){
return;
}
String%%2=Jfc.getSelectedFile().getParent();

63.目录下所有文件夹移动到整合操作

/*
importjava.io.*;
importjava.util.*;
importjavax.swing.*;
*/
JFileChooserJfc=newJFileChooser("请选择源路径");
//建立选择档案对话
//方块盒Jfc
if(!Jfc.isFileSelectionEnabled()){
return;
}
String%%1=Jfc.getSelectedFile().getParent();
Jfc=newJFileChooser("请选择目标路径");
//建立选择档案对话方块盒Jfc
if(!Jfc.isFileSelectionEnabled()){
return;
}
String%%2=Jfc.getSelectedFile().getParent();

64.目录下所有文件复制到整合操作

/*
importjava.io.*;
importjava.util.*;
importjavax.swing.*;
*/
JFileChooserJfc=newJFileChooser("请选择源路径");
//建立选择档案对话
//方块盒Jfc
if(!Jfc.isFileSelectionEnabled()){
return;
}
String%%1=Jfc.getSelectedFile().getParent();
Jfc=newJFileChooser("请选择目标路径");
//建立选择档案对话方块盒Jfc
if(!Jfc.isFileSelectionEnabled()){
return;
}
String%%2=Jfc.getSelectedFile().getParent();

65.目录下所有文件移动到整合操作

/*
importjava.io.*;
importjava.util.*;
importjavax.swing.*;
*/
JFileChooserJfc=newJFileChooser("请选择源路径");
//建立选择档案对话
//方块盒Jfc
if(!Jfc.isFileSelectionEnabled()){
return;
}
String%%1=Jfc.getSelectedFile().getParent();
Jfc=newJFileChooser("请选择目标路径");
//建立选择档案对话方块盒Jfc
if(!Jfc.isFileSelectionEnabled()){
return;
}
String%%2=Jfc.getSelectedFile().getParent();

66.对目标压缩文件解压缩到指定文件夹

/*
importjava.io.*;
importjava.util.*;
importjavax.swing.*;
*/

67.创建目录副本整合操作

/*
importjava.io.*;
importjava.util.*;
importjavax.swing.*;
*/
JFileChooserJfc=newJFileChooser("请选择源路径");
//建立选择档案对话
方块盒Jfc
if(!Jfc.isFileSelectionEnabled()){
return;
}
String%%1=Jfc.getSelectedFile().getParent();
Jfc=newJFileChooser("请选择目标路径");
//建立选择档案对话方块盒Jfc
if(!Jfc.isFileSelectionEnabled()){
return;
}
String%%2=Jfc.getSelectedFile().getParent();

68.打开网页

//importjava.io.*;
try{
Stringcommand="C://ProgramFiles//InternetExplorer//Iexplore.exe"+%%1;
Runtime.getRuntime().exec(command);
}catch(IOExceptionex){
ex.printStackTrace();
}

69.删除空文件夹整合操作

/*
importjava.io.*;
importjava.util.*;
importjavax.swing.*;
*/

70.获取磁盘所有分区后再把光驱盘符去除(用"/0"代替)，把结果放在数组allfenqu[]中，数组中每
个元素代表一个分区盘符，不包括://这样的路径，allfenqu[]数组开始时存放的是所有盘符。
当我用这样的代码测试结果是正确的，光驱盘符会被去掉：

Stringroot;//root代表盘符路径
for(i=0;i<20;i++)//0-20代表最大的盘符数
{
root.Format("%c://",allfenqu[i]);
if(GetDriveType(root)==5)
allfenqu[i]='/0';
}
但我用这样的代码时结果却无法去掉光驱盘符，allfenqu[]中还是会包含光驱盘符：
Stringroot;
for(i=0;i<20;i++)
{
root=allfenqu[i]+"://";
if(GetDriveType(root)==5)
allfenqu[i]='/0';
}

71.激活一个程序或程序关联的文件

//importjava.io.*;
try{
Runtime.getRuntime().exec(%%1);
}catch(IOExceptione){
e.printStackTrace();
}

72.HTTP下载

publicclassDownloadCSVFileActionextendsAction{
publicActionForwardexecute(ActionMappingmapping,ActionFormform,
HttpServletRequestrequest,HttpServletResponseresponse)throwsException{
try{
StringfileName=request.getParameter("fileName");
longmaID=Long.parseLong(request.getParameter("maID"));
StringfilePath=request.getSession().getServletContext
().getRealPath("/")+"csv/"+maID+"/"+fileName;
Filefdown=newFile(filePath);
intfilelength=Integer.parseInt(String.valueOf
(fdown.length()));
//下载类型
response.setContentType("application/text;charset=GB2312");
response.setHeader("Content-Dispositon","attachment;filename=
销售详细记录.csv");//销售详细记录.csv是我想要的下载文件的文件名,但是下载对话框中显
示的是downLoadCSVFile.do
response.setContentLength(filelength);
byteb[]=newbyte[filelength];
FileInputStreamfi=newFileInputStream(fdown);
OutputStreamo=response.getOutputStream();
intn=0;
while((n=fi.read(b))!=-1){
o.write(b,0,n);
}
fi.close();
o.close();
returnnull;
}catch(Exceptione){
request.setAttribute("ERROR",e);
returnmapping.findForward("error");
}
}
}

对应的下载类型

privateStringgetContentType(StringfileName){
StringfileNameTmp=fileName.toLowerCase();
Stringret="";
if(fileNameTmp.endsWith("txt")){
ret="text/plain";
}
if(fileNameTmp.endsWith("gif")){
ret="image/gif";
}
if(fileNameTmp.endsWith("jpg")){
ret="image/jpeg";
}
if(fileNameTmp.endsWith("jpeg")){
ret="image/jpeg";
}
if(fileNameTmp.endsWith("jpe")){
ret="image/jpeg";
}
if(fileNameTmp.endsWith("zip")){
ret="application/zip";
}
if(fileNameTmp.endsWith("rar")){
ret="application/rar";
}
if(fileNameTmp.endsWith("doc")){
ret="application/msword";
}
if(fileNameTmp.endsWith("ppt")){
ret="application/vnd.ms-powerpoint";
}
if(fileNameTmp.endsWith("xls")){
ret="application/vnd.ms-excel";
}
if(fileNameTmp.endsWith("html")){
ret="text/html";
}
if(fileNameTmp.endsWith("htm")){
ret="text/html";
}
if(fileNameTmp.endsWith("tif")){
ret="image/tiff";
}
if(fileNameTmp.endsWith("tiff")){
ret="image/tiff";
}
if(fileNameTmp.endsWith("pdf")){
ret="application/pdf";
}
returnret;
}

73.FTP下载

/*
importsun.net.ftp.FtpClient;
importjava.io.*;
importsun.net.*;
*/
//如果文件在某个目录下，则加入fc.cd("foodir");
//比如要下载ftp://ftp.xx.com/index.html则：
try
{
FtpClientfc=newFtpClient("ftp.xx.com");
fc.login("username","888888");
intch;
Filefi=newFile("c://index.html");
RandomAccessFilegetFile=newRandomAccessFile(fi,"rw");
getFile.seek(0);
TelnetInputStreamfget=fc.get("index.html");
DataInputStreamputs=newDataInputStream(fget);
while((ch=puts.read())>=0){
getFile.write(ch);
}
fget.close();
getFile.close();
fc.closeServer();
}
catch(IOExceptionex)
{
ex.printStackTrace();
}

74.写图像到剪切板setClipboardImage

/*
importjava.awt.*;
importjava.awt.datatransfer.*;
importjava.io.*;
*/
privatefinalImageimage;
Transferabletrans=newTransferable(){
publicDataFlavor[]getTransferDataFlavors(){
returnnewDataFlavor[]{DataFlavor.imageFlavor};
}
publicbooleanisDataFlavorSupported(DataFlavorflavor){
returnDataFlavor.imageFlavor.equals(flavor);
}
publicObjectgetTransferData(DataFlavorflavor)
throwsUnsupportedFlavorException,IOException{
if(isDataFlavorSupported(flavor))
returnimage;
thrownewUnsupportedFlavorException(flavor);
}
};
Toolkit.getDefaultToolkit().getSystemClipboard().setContents(trans,
null);

75.从剪贴板复制图像到窗体

76.删除文件夹下的所有文件且不删除文件夹下的文件夹

//importjava.io.*;
//importjava.util.*;
LinkedList<String>folderList=newLinkedList<String>();
folderList.add(%%1);
while(folderList.size()>0){
Filefile=newFile(folderList.peek());
folderList.removeLast();
File[]files=file.listFiles();
ArrayList<File>fileList=newArrayList<File>();
for(inti=0;i<files.length;i++){
if(files[i].isDirectory()){
folderList.add(files[i].getPath());
}else{
fileList.add(files[i]);
}
}
for(Filef:fileList){
f.delete();
}
}

希望本文所述对大家Java程序设计有所帮助。

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