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;}}
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});} }
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";@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");} }
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;@Overridepublic 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();}}}}
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>
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