android通过servlet上传文件到服务器

服务器端：部署在Tomcat上，直接在myEclipse上开发即可

package com;import java.io.BufferedInputStream;import java.io.ByteArrayOutputStream;import java.io.File;import java.io.FileOutputStream;import java.io.IOException;import java.io.InputStream;import java.io.OutputStream;import java.io.PrintWriter;import java.text.SimpleDateFormat;import java.util.Date;import java.util.List;import javax.servlet.ServletException;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.FileUploadException;import org.apache.commons.fileupload.disk.DiskFileItemFactory;import org.apache.commons.fileupload.servlet.ServletFileUpload;public class upload extends HttpServlet {private String transerFileName ;/** * Constructor of the object. */public upload() {super();}/** * Destruction of the servlet. 
 */public void destroy() {super.destroy(); // Just puts "destroy" string in log// Put your code here}/** * The doGet method of the servlet. 
 *  * This method is called when a form has its tag value method equals to get. *  * @param request *            the request send by the client to the server * @param response *            the response send by the server to the client * @throws ServletException *             if an error occurred * @throws IOException *             if an error occurred */public void doGet(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {response.setContentType("text/html");PrintWriter out = response.getWriter();out.println("");out.println("");out.println("  A Servlet");out.println("  ");out.print("    This is ");out.print(this.getClass());out.println(", using the GET method");out.println("  ");out.println("");out.flush();out.close();}/** * The doPost method of the servlet. 
 *  * This method is called when a form has its tag value method equals to * post. *  * @param request *            the request send by the client to the server * @param response *            the response send by the server to the client * @throws ServletException *             if an error occurred * @throws IOException *             if an error occurred */public void doPost(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {response.setContentType("text/html");// /response.setHeader("Content-Type",// "application/x-www-form-urlencoded; charset=GBK");PrintWriter out = response.getWriter();request.setCharacterEncoding("utf-8");////这句至关重要，不然中文的文件名称显示乱码// 创建文件项目工厂对象DiskFileItemFactory factory = new DiskFileItemFactory();// 设置文件上传路径//String upload = this.getServletContext().getRealPath("/upload/");String upload="F:\\upload";// 获取系统默认的临时文件保存路径，该路径为Tomcat根目录下的temp文件夹// String temp = System.getProperty("java.io.tmpdir");// 设置缓冲区大小为 500Mfactory.setSizeThreshold(1024 * 1024 * 500);// //缓冲区设置太大会上传失败// 设置临时文件夹为temp// factory.setRepository(new File(temp));factory.setRepository(new File(upload));// 用工厂实例化上传组件,ServletFileUpload 用来解析文件上传请求ServletFileUpload servletFileUpload = new ServletFileUpload(factory);// 解析结果放在List中List list;try {list = servletFileUpload.parseRequest(request);for (FileItem item : list) {String name = item.getFieldName();InputStream is = item.getInputStream();if (name.contains("file")) {try {InputStream input = item.getInputStream();String itemName = item.getName();String fileName = itemName.substring(itemName.lastIndexOf("\\") + 1,itemName.length());FileOutputStream output = new FileOutputStream(new File("F:\\upload\\"+ fileName));byte[] buf = new byte[102400];int length = 0;while ((length = input.read(buf)) != -1) {output.write(buf, 0, length);}input.close();output.close();} catch (Exception e) {e.printStackTrace();}out.write("success");out.flush();out.close();}// / if (name.contains("file"))}// /for} catch (FileUploadException e1) {// TODO Auto-generated catch blocke1.printStackTrace();}}/** * Initialization of the servlet. 
 *  * @throws ServletException *             if an error occurs */public void init() throws ServletException {// Put your code here}}

手机端：

package com.example;import java.io.File;import java.io.FileNotFoundException;import java.io.UnsupportedEncodingException;import org.apache.http.client.methods.HttpPost;import android.app.Activity;import android.os.Bundle;import android.os.Environment;import android.util.Log;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.TextView;import android.widget.Toast;import com.loopj.android.http.AsyncHttpClient;import com.loopj.android.http.AsyncHttpResponseHandler;import com.loopj.android.http.RequestParams;public class MainActivity extends Activity {private TextView uploadInfo;private Button button1;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);uploadInfo = (TextView) findViewById(R.id.upload_info);button1 = (Button) findViewById(R.id.button1);button1.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {// TODO 自动生成的方法存根uploadFile();}});}// /onCreateprivate void uploadFile() {// new Thread(new Runnable() {////不能使用线程//// @Override// public void run() {// TODO 自动生成的方法存根// 服务器端地址String url = "http://192.168.0.105:8080/upload/servlet/upload";// 手机端要上传的文件，首先要保存你手机上存在该文件// String filePath = Environment.getExternalStorageDirectory() +// "/1delete/1.jpg";// String filePath ="/sdcard/1delete/1.jpg"; ///可以// String filePath ="/sdcard/11/软工大作业.ppt";///可以// String filePath ="/sdcard/音乐/许嵩-千古.mp3";////别忘了/sdcard开头，，可以// /String filePath ="/sdcard/相机/22222.mp4"; ///30M 不可以String filePath = "/sdcard/音乐/爱的勇气.mp3";Log.i("filePath", filePath);AsyncHttpClient httpClient = new AsyncHttpClient();httpClient.setTimeout(60 * 60 * 1000);RequestParams param = new RequestParams();try {param.put("file", new File(filePath));httpClient.post(url, param, new AsyncHttpResponseHandler() {@Overridepublic void onStart() {super.onStart();uploadInfo.setText("正在上传...");}@Overridepublic void onSuccess(String arg0) {super.onSuccess(arg0);Log.i("ck", "success>" + arg0);if (arg0.equals("success")) {Toast.makeText(MainActivity.this, "上传成功！", 1000).show();}uploadInfo.setText(arg0);}@Overridepublic void onFailure(Throwable arg0, String arg1) {super.onFailure(arg0, arg1);uploadInfo.setText("上传失败！");}});} catch (FileNotFoundException e) {e.printStackTrace();Toast.makeText(MainActivity.this, "上传文件不存在！", 1000).show();}// }// }).start();}}

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