android下小文件上传

客户端代码

package com.example.testuploadfile;


import java.io.BufferedReader;  
import java.io.DataOutputStream;  
import java.io.FileInputStream;  
import java.io.InputStream;  
import java.io.InputStreamReader;  
import java.net.HttpURLConnection;  
import java.net.URL;  
  
import android.app.Activity;  
import android.app.AlertDialog;  
import android.content.DialogInterface;  
import android.os.Bundle;  
import android.view.View;  
import android.widget.Button;  
import android.widget.TextView;  
import android.widget.Toast;  


public class MainActivity extends Activity {


private String uploadFile = "/sdcard/test2.jpg";
private String srcPath = "/sdcard/test2.jpg";
//private String actionUrl = "http://10.0.2.2:8888/MobilePoliceServer/TestUploadFileServlet";
private String actionUrl = "http://192.168.1.100:8888/MobilePoliceServer/TestUploadFileServlet";
private TextView mText1;
private TextView mText2;
private Button mButton;


    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        
        mText1 = (TextView) findViewById(R.id.myText1);
        mText1.setText("文件路径：\n" + uploadFile);
        mText2 = (TextView) findViewById(R.id.myText2);
        mText2.setText("上传网址：\n" + actionUrl);
        
        //设置Button的Onclick事件
        mButton = (Button) findViewById(R.id.myButton);
        mButton.setOnClickListener(new View.OnClickListener() {

public void onClick(View v) {
uploadFile();
}
});
    }


    //上传文件到Servlet的方法
    private void uploadFile(){
    String uploadUrl = "http://192.168.1.100:8888/MobilePoliceServer/TestUploadFileServlet";
    String end = "\r\n";
    String twoHyphens = "--";
    String boundary = "******";
   
    try{
    URL url = new URL(uploadUrl);  
    HttpURLConnection httpURLConnection = (HttpURLConnection) url  
    .openConnection();  
    httpURLConnection.setDoInput(true);  
    httpURLConnection.setDoOutput(true);  
    httpURLConnection.setUseCaches(false);  
    httpURLConnection.setRequestMethod("POST");  
    httpURLConnection.setRequestProperty("Connection", "Keep-Alive");  
    httpURLConnection.setRequestProperty("Charset", "UTF-8");  
    httpURLConnection.setRequestProperty("Content-Type",  
    "multipart/form-data;boundary=" + boundary);  
   
    //设置数据输出流目的地
    DataOutputStream dos = new DataOutputStream(httpURLConnection.getOutputStream());  
    dos.writeBytes(twoHyphens + boundary + end);
    dos.writeBytes("Content-Disposition: form-data; name=\"file\"; filename=\""  
    + srcPath.substring(srcPath.lastIndexOf("/") + 1)  
    + "\"" + end);  
    dos.writeBytes(end);  
   
    //设置数据输入流来源
    FileInputStream fis = new FileInputStream(srcPath);  
    byte[] buffer = new byte[8192]; // 8k  
    int count = 0;  
    while ((count = fis.read(buffer)) != -1)  
    {  
      dos.write(buffer, 0, count);  
    }  
    fis.close();  
     
    dos.writeBytes(end);  
    dos.writeBytes(twoHyphens + boundary + twoHyphens + end);  
    dos.flush();  
    InputStream is = httpURLConnection.getInputStream();  
    InputStreamReader isr = new InputStreamReader(is, "utf-8");  
    BufferedReader br = new BufferedReader(isr);  
    String result = br.readLine();  
     
    Toast.makeText(this, result, Toast.LENGTH_LONG).show();  
    dos.close();  
    is.close(); 
    } catch (Exception e){
    e.printStackTrace();
    setTitle(e.getMessage());
    }
    }
}

服务器端代码

package com.amaker.servlet;


import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.util.List;


import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;


import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.FileItemFactory;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;


/**
 * Servlet implementation class TestUploadFileServlet
 */
@WebServlet("/TestUploadFileServlet")
public class TestUploadFileServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
       
    /**
     * @see HttpServlet#HttpServlet()
     */
    public TestUploadFileServlet() {
        super();
        // TODO Auto-generated constructor stub
    }


/**
* @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
*/
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
try{
request.setCharacterEncoding("UTF-8");
response.setContentType("text/html;charset=UTF-8");
PrintWriter out = response.getWriter();

FileItemFactory factory = new DiskFileItemFactory();
ServletFileUpload upload = new ServletFileUpload(factory);

List<FileItem> items = upload.parseRequest(request);
String uploadPath = "C:\\upload\\";
File file = new File(uploadPath);
if(!file.exists()){
file.mkdir();
}
String filename = "";
InputStream is = null;
for(FileItem item : items){

if(item.isFormField()){
//处理普通表单域
if(item.getFieldName().equals("filename")){
if(!item.getString().equals("")){
filename = item.getString("UTF-8");
}
}
}
//处理上传文件
else if(item.getName() != null && !item.getName().equals("")){
filename = item.getName().substring(item.getName().lastIndexOf("\\") + 1);
is = item.getInputStream();//得到上传文件的InputStream对象
}


filename = uploadPath + filename;

if(new File(filename).exists()){
new File(filename).delete();
}
//开始上传文件
if(!filename.equals("")){
FileOutputStream fos = new FileOutputStream(filename);
byte[] buffer = new byte[8192];
int count = 0;
while((count = is.read(buffer)) > 0){
//向服务器端文件写入字节流
fos.write(buffer, 0, count);
}
fos.close();
is.close();
out.println("文件上传成功！");
}
}
} catch (Exception e){
e.printStackTrace();
}
}


/**
* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
*/
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
doGet(request,response);
}


}

在手机上可以上传，在模拟器上好像没有反应。