Android上传文件至服务器

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 parameterName, 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;    }    }

复制代码

          

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, 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, 0, 1024))!=-1){                     outStream.write(buffer, 0, len);                 }                 uploadFile.getInStream().close();             }else{                 outStream.write(uploadFile.getData(), 0, 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,value为参数值     * @param file 上传文件     */    public static boolean post(String path, Map<String, String> params, FormFile file) throws Exception{       return post(path, params, new FormFile[]{file});    }}

复制代码

        

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, params, formfile);            Log.i(TAG, "upload success");        } catch (Exception e) {            Log.i(TAG, "upload error");            e.printStackTrace();        }        Log.i(TAG, "upload end");    }}

复制代码

           

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> 

复制代码

         

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, 0, 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();            }        }    }}

复制代码

             

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" class="com.ljq.action.UploadAction">            <!-- 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>

复制代码

                

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>

复制代码

       

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

<script type="text/javascript"></script>