springboot单文件下载和多文件压缩zip下载的实现
单文件下载
//下载单个文件
publicvoiddownloadFile(HttpServletResponseresponse){
Stringpath="D:\test\ce\1.txt"
Filefile=newFile(path);
if(file.exists()){
StringfileName=file.getName();
response.setHeader("Content-Disposition","attachment;fileName="+fileName);
download(response,file);
}
}
publicvoiddownload(HttpServletResponseresponse,Filefile){
FileInputStreamfis=null;
BufferedInputStreambis=null;
OutputStreamos=null;
try{
os=response.getOutputStream();
fis=newFileInputStream(file);
bis=newBufferedInputStream(fis);
byte[]buffer=newbyte[bis.available()];
inti=bis.read(buffer);
while(i!=-1){
os.write(buffer,0,i);
i=bis.read(buffer);
}
}catch(Exceptione){
e.printStackTrace();
}
try{
bis.close();
fis.close();
os.close();
}catch(IOExceptione){
e.printStackTrace();
}
}
多文件压缩下载
//多个文件，压缩成zip后下载
publicvoiddownloadMoreFile(HttpServletResponseresponse){
Stringtest1="D:\test\ce\1.txt";
Stringtest2="D:\test\ce\2.txt";
Filetfile=newFile(test1);
Filecfile=newFile(test2);
Listfiles=newArrayList<>();
files.add(tfile);
files.add(cfile);
if(tfile.exists()&&cfile.exists()){
StringzipTmp="D:\test\ce\1.zip";
zipd(zipTmp,files,response);
}
}
publicvoidzipd(StringzipTmp,Listfiles,HttpServletResponseresponse){
FilezipTmpFile=newFile(zipTmp);
try{
if(zipTmpFile.exists()){
zipTmpFile.delete();
}
zipTmpFile.createNewFile();
response.reset();
//创建文件输出流
FileOutputStreamfous=newFileOutputStream(zipTmpFile);
ZipOutputStreamzipOut=newZipOutputStream(fous);
zipFile(files,zipOut);
zipOut.close();
fous.close();
downloadZip(zipTmpFile,response);
}catch(IOExceptione){
e.printStackTrace();
}
}
//files打成压缩包
publicvoidzipFile(Listfiles,ZipOutputStreamoutputStream){
intsize=files.size();
for(inti=0;i
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