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 = ;
        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()==- ?  : 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[];
                 int len = ;
                 while((len = uploadFile.getInStream().read(buffer, , ))!=-){
                     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("")==-){//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";

    @Override
    public 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() {

            @Override
            public 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", ).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";
    }

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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[];
            int len = ;
            while ((len = fis.read(buffer)) != -) {
                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();
            }
        }
    }

}

下面来看下运行效果

项目的文件夹也已经生成了文件