Android实现上传文件到服务器实例详解

概述本实例实现每隔5秒上传一次，通过服务器端获取手机上传过来的文件信息并做相应处理；采用Android+Struts2技术。

本实例实现每隔5秒上传一次，通过服务器端获取手机上传过来的文件信息并做相应处理；采用AndroID+Struts2技术。

一、AndroID端实现文件上传
1)、新建一个AndroID项目命名为androIDUpload，目录结构如下：

2)、新建Formfile类，用来封装文件信息

package com.ljq.utils;import java.io.file;import java.io.fileinputStream;import java.io.fileNotFoundException;import java.io.inputStream;/** * 上传文件 */public class Formfile {  /* 上传文件的数据 */  private byte[] data;  private inputStream inStream;  private file file;  /* 文件名称 */  private String filname;  /* 请求参数名称*/  private String parametername;  /* 内容类型 */  private String ContentType = "application/octet-stream";    public Formfile(String filname,byte[] data,String parametername,String ContentType) {    this.data = data;    this.filname = filname;    this.parametername = parametername;    if(ContentType!=null) this.ContentType = ContentType;  }    public Formfile(String filname,file file,String ContentType) {    this.filname = filname;    this.parametername = parametername;    this.file = file;    try {      this.inStream = new fileinputStream(file);    } catch (fileNotFoundException e) {      e.printstacktrace();    }    if(ContentType!=null) this.ContentType = ContentType;  }    public file getfile() {    return file;  }  public inputStream getInStream() {    return inStream;  }  public byte[] getData() {    return data;  }  public String getFilname() {    return filname;  }  public voID setFilname(String filname) {    this.filname = filname;  }  public String getParametername() {    return parametername;  }  public voID setParametername(String parametername) {    this.parametername = parametername;  }  public String getContentType() {    return ContentType;  }  public voID setContentType(String ContentType) {    this.ContentType = ContentType;  }  }

3）、新建SockethttpRequester类，封装上传文件到服务器代码

package com.ljq.utils;import java.io.BufferedReader;import java.io.inputStreamReader;import java.io.OutputStream;import java.net.InetAddress;import java.net.socket;import java.net.URL;import java.util.Map;/** * 上传文件到服务器 *  * @author administrator * */public class SockethttpRequester {  /**   * 直接通过http协议提交数据到服务器,实现如下面表单提交功能:   *  <FORM METHOD=POST ACTION="http://192.168.1.101:8083/upload/servlet/UploadServlet" enctype="multipart/form-data">      <input TYPE="text" name="name">      <input TYPE="text" name="ID">      <input type="file" name="imagefile"/>      <input type="file" name="zip"/>     </FORM>   * @param path 上传路径(注：避免使用localhost或127.0.0.1这样的路径测试，因为它会指向手机模拟器，你可以使用http://www.iteye.cn或http://192.168.1.101:8083这样的路径测试)   * @param params 请求参数 key为参数名,value为参数值   * @param file 上传文件   */  public static boolean post(String path,Map<String,String> params,Formfile[] files) throws Exception{       final String BOUNDARY = "---------------------------7da2137580612"; //数据分隔线    final String endline = "--" + BOUNDARY + "--\r\n";//数据结束标志        int fileDataLength = 0;    for(Formfile uploadfile : files){//得到文件类型数据的总长度      StringBuilder fileExplain = new StringBuilder();       fileExplain.append("--");       fileExplain.append(BOUNDARY);       fileExplain.append("\r\n");       fileExplain.append("Content-disposition: form-data;name=\""+ uploadfile.getParametername()+"\";filename=\""+ uploadfile.getFilname() + "\"\r\n");       fileExplain.append("Content-Type: "+ uploadfile.getContentType()+"\r\n\r\n");       fileExplain.append("\r\n");       fileDataLength += fileExplain.length();      if(uploadfile.getInStream()!=null){        fileDataLength += uploadfile.getfile().length();       }else{         fileDataLength += uploadfile.getData().length;       }    }    StringBuilder textEntity = new StringBuilder();    for (Map.Entry<String,String> entry : params.entrySet()) {//构造文本类型参数的实体数据      textEntity.append("--");      textEntity.append(BOUNDARY);      textEntity.append("\r\n");      textEntity.append("Content-disposition: form-data; name=\""+ entry.getKey() + "\"\r\n\r\n");      textEntity.append(entry.getValue());      textEntity.append("\r\n");    }    //计算传输给服务器的实体数据总长度    int dataLength = textEntity.toString().getBytes().length + fileDataLength + endline.getBytes().length;        URL url = new URL(path);    int port = url.getPort()==-1 ? 80 : url.getPort();    Socket socket = new Socket(InetAddress.getByname(url.getHost()),port);          OutputStream outStream = socket.getoutputStream();    //下面完成http请求头的发送    String requestmethod = "POST "+ url.getPath()+" http/1.1\r\n";    outStream.write(requestmethod.getBytes());    String accept = "Accept: image/gif,image/jpeg,image/pjpeg,application/x-shockwave-flash,application/xaml+xml,application/vnd.ms-xpsdocument,application/x-ms-xbap,application/x-ms-application,application/vnd.ms-excel,application/vnd.ms-powerpoint,application/msword,*/*\r\n";    outStream.write(accept.getBytes());    String language = "Accept-Language: zh-CN\r\n";    outStream.write(language.getBytes());    String ContentType = "Content-Type: multipart/form-data; boundary="+ BOUNDARY+ "\r\n";    outStream.write(ContentType.getBytes());    String contentlength = "Content-Length: "+ dataLength + "\r\n";    outStream.write(contentlength.getBytes());    String alive = "Connection: Keep-Alive\r\n";    outStream.write(alive.getBytes());    String host = "Host: "+ url.getHost() +":"+ port +"\r\n";    outStream.write(host.getBytes());    //写完http请求头后根据http协议再写一个回车换行    outStream.write("\r\n".getBytes());    //把所有文本类型的实体数据发送出来    outStream.write(textEntity.toString().getBytes());          //把所有文件类型的实体数据发送出来    for(Formfile uploadfile : files){      StringBuilder fileEntity = new StringBuilder();       fileEntity.append("--");       fileEntity.append(BOUNDARY);       fileEntity.append("\r\n");       fileEntity.append("Content-disposition: form-data;name=\""+ uploadfile.getParametername()+"\";filename=\""+ uploadfile.getFilname() + "\"\r\n");       fileEntity.append("Content-Type: "+ uploadfile.getContentType()+"\r\n\r\n");       outStream.write(fileEntity.toString().getBytes());       if(uploadfile.getInStream()!=null){         byte[] buffer = new byte[1024];         int len = 0;         while((len = uploadfile.getInStream().read(buffer,1024))!=-1){           outStream.write(buffer,len);         }         uploadfile.getInStream().close();       }else{         outStream.write(uploadfile.getData(),uploadfile.getData().length);       }       outStream.write("\r\n".getBytes());    }    //下面发送数据结束标志，表示数据已经结束    outStream.write(endline.getBytes());        BufferedReader reader = new BufferedReader(new inputStreamReader(socket.getinputStream()));    if(reader.readline().indexOf("200")==-1){//读取web服务器返回的数据，判断请求码是否为200，如果不是200，代表请求失败      return false;    }    outStream.flush();    outStream.close();    reader.close();    socket.close();    return true;  }    /**   * 提交数据到服务器   * @param path 上传路径(注：避免使用localhost或127.0.0.1这样的路径测试，因为它会指向手机模拟器，你可以使用http://www.itcast.cn或http://192.168.1.10:8080这样的路径测试)   * @param params 请求参数 key为参数名,Formfile file) throws Exception{    return post(path,params,new Formfile[]{file});  }}

4)、新建MainActivity类，实现每隔5秒上传一次

package com.ljq.activity;import java.io.file;import java.util.HashMap;import java.util.Map;import androID.app.Activity;import androID.os.Bundle;import androID.os.Environment;import androID.os.Handler;import androID.util.Log;import com.ljq.utils.Formfile;import com.ljq.utils.sockethttpRequester;public class MainActivity extends Activity {  private file file;  private Handler handler;  private static final String TAG="MainActivity";  @OverrIDe  public voID onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentVIEw(R.layout.main);    Log.i(TAG,"onCreate");        file = new file(Environment.getExternalStorageDirectory(),"123.rmvb");    Log.i(TAG,"照片文件是否存在："+file);    handler=new Handler();    handler.post(runnable);  }    Runnable runnable=new Runnable() {      public voID run() {      Log.i(TAG,"runnable run");      uploadfile(file);      handler.postDelayed(runnable,5000);    }    };    /**   * 上传图片到服务器   *    * @param imagefile 包含路径   */  public voID uploadfile(file imagefile) {    Log.i(TAG,"upload start");    try {      String requestUrl = "http://192.168.1.101:8083/upload/upload/execute.do";      //请求普通信息      Map<String,String> params = new HashMap<String,String>();      params.put("username","张三");      params.put("pwd","zhangsan");      params.put("age","21");      params.put("filename",imagefile.getname());      //上传文件      Formfile formfile = new Formfile(imagefile.getname(),imagefile,"image","application/octet-stream");            SockethttpRequester.post(requestUrl,formfile);      Log.i(TAG,"upload success");    } catch (Exception e) {      Log.i(TAG,"upload error");      e.printstacktrace();    }    Log.i(TAG,"upload end");  }}

5)、修改清单文件

<?xml version="1.0" enCoding="utf-8"?><manifest xmlns:androID="http://schemas.androID.com/apk/res/androID"   package="com.ljq.activity"   androID:versionCode="1"   androID:versionname="1.0">  <application androID:icon="@drawable/icon" androID:label="@string/app_name">    <activity androID:name=".MainActivity"         androID:label="@string/app_name">      <intent-filter>        <action androID:name="androID.intent.action.MAIN" />        <category androID:name="androID.intent.category.LAUNCHER" />      </intent-filter>    </activity>  </application>  <uses-sdk androID:minSdkVersion="4" />  <uses-permission androID:name="androID.permission.INTERNET" /> </manifest> 

启动模拟器，运行如下：

二、服务器端用来获取AndroID端上传过来的文件信息

1)、新建一个web项目命名为upload，目录结构如下

注意：记得加入struts2 jar包，需加入的jar如下

2)、新建action类，命名为UploadAction，内容如下

package com.ljq.action;import java.io.file;import java.io.fileinputStream;import java.io.fileOutputStream;import java.io.IOException;import javax.servlet.http.httpServletRequest;import org.apache.struts2.ServletActionContext;import com.opensymphony.xwork2.ActionSupport;/** * 获取AndroID端上传过来的信息 *  * @author administrator * */@SuppressWarnings("serial")public class UploadAction extends ActionSupport {  // 上传文件域  private file image;  // 上传文件类型  private String imageContentType;  // 封装上传文件名  private String imagefilename;  // 接受依赖注入的属性  private String savePath;  @OverrIDe  public String execute() {    httpServletRequest request=ServletActionContext.getRequest();    fileOutputStream fos = null;    fileinputStream fis = null;    try {      System.out.println("获取AndroID端传过来的普通信息：");      System.out.println("用户名："+request.getParameter("username"));      System.out.println("密码："+request.getParameter("pwd"));      System.out.println("年龄："+request.getParameter("age"));      System.out.println("文件名："+request.getParameter("filename"));      System.out.println("获取AndroID端传过来的文件信息：");      System.out.println("文件存放目录: "+getSavePath());      System.out.println("文件名称: "+imagefilename);      System.out.println("文件大小: "+image.length());      System.out.println("文件类型: "+imageContentType);            fos = new fileOutputStream(getSavePath() + "/" + getimagefilename());      fis = new fileinputStream(getimage());      byte[] buffer = new byte[1024];      int len = 0;      while ((len = fis.read(buffer)) != -1) {        fos.write(buffer,len);      }      System.out.println("文件上传成功");    } catch (Exception e) {      System.out.println("文件上传失败");      e.printstacktrace();    } finally {      close(fos,fis);    }    return SUCCESS;  }  /**   * 文件存放目录   *    * @return   */  public String getSavePath() throws Exception{    return ServletActionContext.getServletContext().getRealPath(savePath);   }  public voID setSavePath(String savePath) {    this.savePath = savePath;  }  public file getimage() {    return image;  }  public voID setimage(file image) {    this.image = image;  }  public String getimageContentType() {    return imageContentType;  }  public voID setimageContentType(String imageContentType) {    this.imageContentType = imageContentType;  }  public String getimagefilename() {    return imagefilename;  }  public voID setimagefilename(String imagefilename) {    this.imagefilename = imagefilename;  }  private voID close(fileOutputStream fos,fileinputStream fis) {    if (fis != null) {      try {        fis.close();        fis=null;      } catch (IOException e) {        System.out.println("fileinputStream关闭失败");        e.printstacktrace();      }    }    if (fos != null) {      try {        fos.close();        fis=null;      } catch (IOException e) {        System.out.println("fileOutputStream关闭失败");        e.printstacktrace();      }    }  }}

3)、配置struts.xml

<?xml version="1.0" enCoding="UTF-8" ?><!DOCTYPE struts PUBliC  "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"  "http://struts.apache.org/dtds/struts-2.0.dtd"><struts>  <!-- 该属性指定需要Struts2处理的请求后缀，该属性的默认值是action，即所有匹配*.action的请求都由Struts2处理。    如果用户需要指定多个请求后缀，则多个后缀之间以英文逗号（,）隔开。 -->  <constant name="struts.action.extension" value="do"/>  <!-- 设置浏览器是否缓存静态内容,默认值为true(生产环境下使用),开发阶段最好关闭 -->  <constant name="struts.serve.static.browserCache" value="false"/>  <!-- 当struts的配置文件修改后,系统是否自动重新加载该文件,默认值为false(生产环境下使用),开发阶段最好打开 -->  <constant name="struts.configuration.xml.reload" value="true"/>  <!-- 开发模式下使用,这样可以打印出更详细的错误信息 -->  <constant name="struts.devMode" value="true"/>  <!-- 默认的视图主题 -->  <constant name="struts.ui.theme" value="simple"/>  <!--<constant name="struts.objectFactory" value="spring" />-->  <!--解决乱码  -->  <constant name="struts.i18n.enCoding" value="UTF-8"/>  <!-- 指定允许上传的文件最大字节数。默认值是2097152(2M) -->  <constant name="struts.multipart.maxSize" value="22097152"/>  <!-- 设置上传文件的临时文件夹,默认使用javax.servlet.context.tempdir -->  <constant name="struts.multipart.saveDir " value="d:/tmp"/>    <package name="upload" namespace="/upload" extends="struts-default">    <action name="execute" >      <!-- 动态设置savePath的属性值 -->      <param name="savePath">/image</param>      <result name="success">/WEB-INF/page/message.Jsp</result>    </action>  </package></struts>

4)、配置web.xml

<?xml version="1.0" enCoding="UTF-8"?><web-app version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee"  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"  xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee   http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">  <filter>    <filter-name>struts2</filter-name>    <filter-class>      org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter    </filter-class>  </filter>  <filter-mapPing>    <filter-name>struts2</filter-name>    <url-pattern>/*</url-pattern>  </filter-mapPing>    <filter>    <filter-name>strutsCleanup</filter-name>    <filter-class>      org.apache.struts2.dispatcher.ActionContextCleanUp    </filter-class>  </filter>  <filter-mapPing>    <filter-name>strutsCleanup</filter-name>    <url-pattern>/*</url-pattern>  </filter-mapPing>    <welcome-file-List>    <welcome-file>index.Jsp</welcome-file>  </welcome-file-List></web-app>

运行结构如下：

获取AndroID端传过来的普通信息：
用户名：张三
密码：zhangsan
年龄：21
文件名：123.rmvb
获取AndroID端传过来的文件信息：
文件存放目录: D:\apache-tomcat-6.0.18\webapps\upload\image
文件名称: 123.rmvb
文件大小: 3962649
文件类型: application/octet-stream
文件上传成功

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