1.创建一个Dynamic Web project工程,指定其服务器，我们这里用的是Tomcat7.0，新建index.jsp文件，其内容如下:
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
<form action="Upload" method="post" enctype="multipart/form-data">
<input type="file" name="file" ></br>
<input type="submit" name="submit"></br>
</form>
</body>
</html>
2.新建一个form action对应的Servlet。
/**
* Servlet implementation class Upload
*/
@WebServlet("/Upload")
@MultipartConfig(location="G:\\") //指定文件上传的地址这里是G盘
public class Upload extends HttpServlet {
private static final long serialVersionUID = 1L;
/**
* @see HttpServlet#HttpServlet()
*/
public Upload() {
super();
// TODO Auto-generated constructor stub
}
/**
* @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
*/
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
doPost(request, response);
}
/**
* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
*/
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
Part part = request.getPart("file");
part.write("dsa.jpg");
response.setCharacterEncoding("UTF-8");
PrintWriter out = response.getWriter();
out.write("upload success");
}
}
到这里Web就已经配置完了，打开浏览器运行一遍
选择完文件并提交这文件就在本地的G盘下了，提交时，打开Google浏览器开发者工具查看header，即请求头信息，以助在后面Android客户端开发
设置连接请求时的参数对照
3.Android客户端创建一个UploadThread
package com.pt.http01;
import android.util.Log;
import java.io.BufferedReader;
import java.io.DataOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
/**
* Created by 韬 on 2016-05-14.
*/
public class UploadThread extends Thread{
private String url;
private String filename;
private static final String TAG = "UploadThread";
public UploadThread(String url,String filename){
this.url = url;
this.filename = filename;
}
@Override
public void run() {
String boundary = "---------------------------7e02933960556";
String prefix = "--";
String end = "\r\n";
try {
URL httpurl = new URL(url);
HttpURLConnection conn = (HttpURLConnection) httpurl.openConnection();
conn.setRequestMethod("POST");
conn.setDoInput(true);
conn.setDoOutput(true);
conn.setRequestProperty("Content-Type",
"multipart/form-data; boundary=" + boundary);
DataOutputStream out = new DataOutputStream(conn.getOutputStream());
out.writeBytes(prefix + boundary + end);
out.writeBytes("Content-Disposition: form-data; name=\"file\"; filename=\"" + "dsa.jpg" + "\"" + end);
FileInputStream inputStream = new FileInputStream(new File(filename));
byte[] data = new byte[1024*4];
int len = 0;
while ((len = inputStream.read(data)) != -1){
out.write(data,0,len);
}
out.writeBytes(end);
out.writeBytes(prefix + boundary + prefix + end);
out.flush();
BufferedReader reader = new BufferedReader(new InputStreamReader(conn.getInputStream()));
StringBuffer sb = new StringBuffer();
String str;
while((str = reader.readLine()) != null){
sb.append(str);
}
Log.i(TAG, "run: \"reponse\"" + sb.toString());
if (out != null){
out.close();
}
if(reader != null){
reader.close();
}
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
}