android通过servlet上传文件到服务器

本文实例为大家分享了android通过servlet上传文件到服务器的具体代码，供大家参考，具体内容如下

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 500M factory.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 block e1.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;  @Override protected 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() {  @Override public void onClick(View v) { // TODO 自动生成的方法存根 uploadFile(); } });  }// /onCreate  private 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() { @Override public void onStart() {  super.onStart();  uploadInfo.setText("正在上传..."); }  @Override public 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); }  @Override public 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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以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持脚本之家。

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