利用HttpUrlConnection 上传 接收文件的实现方法
如下所示：
//客户端代码
publicstaticvoidmain(String[]args)throwsIOException{
DataInputStreamin=null;
OutputStreamout=null;
HttpURLConnectionconn=null;
JSONObjectresposeTxt=null;
InputStreamins=null;
ByteArrayOutputStreamoutStream=null;
try{
URLurl=newURL("http://10.28.160.160:9080/main/uploadFile?fileName=列表.txt");
conn=(HttpURLConnection)url.openConnection();
//发送POST请求必须设置如下两行
conn.setDoOutput(true);
conn.setUseCaches(false);
conn.setRequestMethod("POST");
conn.setRequestProperty("Content-Type","text/html");
conn.setRequestProperty("Cache-Control","no-cache");
conn.setRequestProperty("Charsert","UTF-8");
conn.connect();
conn.setConnectTimeout(10000);
out=conn.getOutputStream();
Filefile=newFile("H:/Users/chengtingyu/Desktop/test/list.txt");
in=newDataInputStream(newFileInputStream(file));
intbytes=0;
byte[]buffer=newbyte[1024];
while((bytes=in.read(buffer))!=-1){
out.write(buffer,0,bytes);
}
out.flush();
//返回流
if(conn.getResponseCode()==HttpURLConnection.HTTP_OK){
ins=conn.getInputStream();
outStream=newByteArrayOutputStream();
byte[]data=newbyte[1024];
intcount=-1;
while((count=ins.read(data,0,1024))!=-1){
outStream.write(data,0,count);
}
data=null;
resposeTxt=JSONObject.parseObject(newString(outStream
.toByteArray(),"UTF-8"));
}
}catch(Exceptione){
e.printStackTrace();
}finally{
if(in!=null){
in.close();
}
if(out!=null){
out.close();
}
if(ins!=null){
ins.close();
}
if(outStream!=null){
outStream.close();
}
if(conn!=null){
conn.disconnect();
}
}
}
//服务端代码
publicStringuploadFile()throwsException{
StringfileName=request.getParameter("fileName");
StringfileFullPath="H:/Users/chengtingyu/Desktop/"+fileName;
InputStreaminput=null;
FileOutputStreamfos=null;
try{
input=request.getInputStream();
Filefile=newFile("H:/Users/chengtingyu/Desktop");
if(!file.exists()){
file.mkdirs();
}
fos=newFileOutputStream(fileFullPath);
intsize=0;
byte[]buffer=newbyte[1024];
while((size=input.read(buffer,0,1024))!=-1){
fos.write(buffer,0,size);
}
//响应信息json字符串格式
Map<String,Object>responseMap=newHashMap<String,Object>();
responseMap.put("flag",true);
//生成响应的json字符串
StringjsonResponse=JSONObject.toJSONString(responseMap);
sendResponse(jsonResponse);
}catch(IOExceptione){
//响应信息json字符串格式
Map<String,Object>responseMap=newHashMap<String,Object>();
responseMap.put("flag",false);
responseMap.put("errorMsg",e.getMessage());
StringjsonResponse=JSONObject.toJSONString(responseMap);
sendResponse(jsonResponse);
}finally{
if(input!=null){
input.close();
}
if(fos!=null){
fos.close();
}
}
returnnull;
}
/**
*返回响应
*
*@throwsException
*/
privatevoidsendResponse(StringresponseString)throwsException{
response.setContentType("application/json;charset=UTF-8");
PrintWriterpw=null;
try{
pw=response.getWriter();
pw.write(responseString);
pw.flush();
}finally{
IOUtils.closeQuietly(pw);
}
}
以上这篇利用HttpUrlConnection上传接收文件的实现方法就是小编分享给大家的全部内容了，希望能给大家一个参考，也希望大家多多支持毛票票。