本實例實現每隔5秒上傳一次，通過服務器端獲取手機上傳過來的文件信息并做相應處理；采用Android+Struts2技術。

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一、Android端實現文件上傳

1)、新建一個Android項目命名為androidUpload，目錄結構如下：

2)、新建FormFile類，用來封裝文件信息

package com.ljq.utils;import java.io.File; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.InputStream;/*** 上傳文件*/ public class FormFile {/* 上傳文件的數據 */private byte[] data;private InputStream inStream;private File file;/* 文件名稱 */private String filname;/* 請求參數名稱*/private String parameterName;/* 內容類型 */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;}}

3）、新建SocketHttpRequester類，封裝上傳文件到服務器代碼

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;/*** 上傳文件到服務器* * @author Administrator**/ public class SocketHttpRequester {/*** 直接通過HTTP協議提交數據到服務器,實現如下面表單提交功能:* <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 上傳路徑(注：避免使用localhost或127.0.0.1這樣的路徑測試，因為它會指向手機模擬器，你可以使用http://www.iteye.cn或http://192.168.1.101:8083這樣的路徑測試)* @param params 請求參數 key為參數名,value為參數值* @param file 上傳文件*/public static boolean post(String path, Map<String, String> params, FormFile[] files) throws Exception{ final String BOUNDARY = "---------------------------7da2137580612"; //數據分隔線final String endline = "--" + BOUNDARY + "--\r\n";//數據結束標志int fileDataLength = 0;for(FormFile uploadFile : files){//得到文件類型數據的總長度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()) {//構造文本類型參數的實體數據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");}//計算傳輸給服務器的實體數據總長度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請求頭的發送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());//寫完HTTP請求頭后根據HTTP協議再寫一個回車換行outStream.write("\r\n".getBytes());//把所有文本類型的實體數據發送出來 outStream.write(textEntity.toString().getBytes()); //把所有文件類型的實體數據發送出來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());}//下面發送數據結束標志，表示數據已經結束 outStream.write(endline.getBytes());BufferedReader reader = new BufferedReader(new InputStreamReader(socket.getInputStream()));if(reader.readLine().indexOf("200")==-1){//讀取web服務器返回的數據，判斷請求碼是否為200，如果不是200，代表請求失敗return false;}outStream.flush();outStream.close();reader.close();socket.close();return true;}/*** 提交數據到服務器* @param path 上傳路徑(注：避免使用localhost或127.0.0.1這樣的路徑測試，因為它會指向手機模擬器，你可以使用http://www.itcast.cn或http://192.168.1.10:8080這樣的路徑測試)* @param params 請求參數 key為參數名,value為參數值* @param file 上傳文件*/public static boolean post(String path, Map<String, String> params, FormFile file) throws Exception{return post(path, params, new FormFile[]{file});} }

4)、新建MainActivity類，實現每隔5秒上傳一次

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";@Overridepublic 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);}};/*** 上傳圖片到服務器* * @param imageFile 包含路徑*/public void uploadFile(File imageFile) {Log.i(TAG, "upload start");try {String requestUrl = "http://192.168.1.101:8083/upload/upload/execute.do";//請求普通信息Map<String, String> params = new HashMap<String, String>();params.put("username", "張三");params.put("pwd", "zhangsan");params.put("age", "21");params.put("fileName", imageFile.getName());//上傳文件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");} }

5)、修改清單文件

<?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>

啟動模擬器，運行如下：

二、服務器端用來獲取Android端上傳過來的文件信息

1)、新建一個web項目命名為upload，目錄結構如下

注意：記得加入struts2 jar包，需加入的jar如下

2)、新建action類，命名為UploadAction，內容如下

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;/*** 獲取Android端上傳過來的信息* * @author Administrator**/ @SuppressWarnings("serial") public class UploadAction extends ActionSupport {// 上傳文件域private File image;// 上傳文件類型private String imageContentType;// 封裝上傳文件名private String imageFileName;// 接受依賴注入的屬性private String savePath;@Overridepublic String execute() {HttpServletRequest request=ServletActionContext.getRequest();FileOutputStream fos = null;FileInputStream fis = null;try {System.out.println("獲取Android端傳過來的普通信息：");System.out.println("用戶名："+request.getParameter("username"));System.out.println("密碼："+request.getParameter("pwd"));System.out.println("年齡："+request.getParameter("age"));System.out.println("文件名："+request.getParameter("fileName"));System.out.println("獲取Android端傳過來的文件信息：");System.out.println("文件存放目錄: "+getSavePath());System.out.println("文件名稱: "+imageFileName);System.out.println("文件大小: "+image.length());System.out.println("文件類型: "+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("文件上傳成功");} catch (Exception e) {System.out.println("文件上傳失敗");e.printStackTrace();} finally {close(fos, fis);}return SUCCESS;}/*** 文件存放目錄* * @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關閉失敗");e.printStackTrace();}}if (fos != null) {try {fos.close();fis=null;} catch (IOException e) {System.out.println("FileOutputStream關閉失敗");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><!-- 該屬性指定需要Struts2處理的請求后綴，該屬性的默認值是action，即所有匹配*.action的請求都由Struts2處理。如果用戶需要指定多個請求后綴，則多個后綴之間以英文逗號（,）隔開。 --><constant name="struts.action.extension" value="do"/><!-- 設置瀏覽器是否緩存靜態內容,默認值為true(生產環境下使用),開發階段最好關閉 --><constant name="struts.serve.static.browserCache" value="false"/><!-- 當struts的配置文件修改后,系統是否自動重新加載該文件,默認值為false(生產環境下使用),開發階段最好打開 --><constant name="struts.configuration.xml.reload" value="true"/><!-- 開發模式下使用,這樣可以打印出更詳細的錯誤信息 --><constant name="struts.devMode" value="true"/><!-- 默認的視圖主題 --><constant name="struts.ui.theme" value="simple"/><!--<constant name="struts.objectFactory" value="spring" />--><!--解決亂碼 --><constant name="struts.i18n.encoding" value="UTF-8"/><!-- 指定允許上傳的文件最大字節數。默認值是2097152(2M) --><constant name="struts.multipart.maxSize" value="22097152"/><!-- 設置上傳文件的臨時文件夾,默認使用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"><!-- 動態設置savePath的屬性值 --><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>

運行結構如下：

獲取Android端傳過來的普通信息：
用戶名：張三
密碼：zhangsan
年齡：21
文件名：123.rmvb
獲取Android端傳過來的文件信息：
文件存放目錄: D:\apache-tomcat-6.0.18\webapps\upload\image
文件名稱: 123.rmvb
文件大小: 3962649
文件類型: application/octet-stream
文件上傳成功

轉載于:https://www.cnblogs.com/li-fei/p/4356496.html

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