android和struts2实现android文件上传

1.开发准备如下2个工具类

package org.lxh.util;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);            //socket.getSendBufferSize()        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://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});    }}

package org.lxh.util;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;    }    }

这2个方法是用的比较广泛的，大家直接复制了拿去用就好了。

2.为了方便测试，建议复制一个文件到sd卡里面，我就直接上activity了

package org.lxh.upload;import java.io.File;import java.util.*;import org.lxh.util.FormFile;import org.lxh.util.SocketHttpRequester;import android.app.Activity;import android.app.Dialog;import android.app.ProgressDialog;import android.os.Bundle;import android.os.Environment;import android.util.Log;import android.view.View;import android.widget.Button;import android.widget.EditText;import android.widget.Toast;public class UploadActivity extends Activity {private File file;private static final String TAG = "UploadActivity";@Overridepublic void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.main);//EditText filename = (EditText) this.findViewById(R.id.filename);Button b = (Button) this.findViewById(R.id.button);b.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {// 创建file对象file = new File(Environment.getExternalStorageDirectory(),"gj.mp3");if (!file.exists()) {Toast.makeText(UploadActivity.this, "文件不存在",Toast.LENGTH_LONG).show();} else {// Toast.makeText(UploadActivity.this,"文件存在",Toast.LENGTH_LONG).show();uploadFile(file);Toast.makeText(UploadActivity.this, "文件上传成功", 1).show();}}});}public String uploadFile(File imageFile) {try {String requestUrl = "http://192.168.0.104:8080/LoginService/upload/upload/execute.do";// 请求普通信息Map<String, String> params = new HashMap<String, String>();// params.put("filename", "张三");params.put("name", "张三");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);} catch (Exception e) {Log.i(TAG, "upload error");e.printStackTrace();}Log.i(TAG, "upload end");return "OK";}}

下面就是服务器端的代码了，我这里用struts2实现，struts1也是很方便的

package org.lxh;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();            }        }    }}

下面来看下运行效果

项目的文件夹也已经生成了文件