FileUploadUtil.java

package com.itap.voiceemoticon.util;

import java.io.DataOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;

public class FileUploadUtil {
    /**
     * 上传文件至Server的方法
     * 
     * @param urlStr 服务器对应的路径
     * @param serverFileName 上传服务器后在服务器上的文件名称 如：image.jpg
     * @param uploadFile 要上传的文件路径 如：/sdcard/a.jpg
     */
    public void uploadFile(String urlStr, String serverFileName, File uploadFile) {
        String end = "\r\n";
        String twoHyphens = "--";
        String boundary = "*****";
        try {
            URL url = new URL(urlStr);
            HttpURLConnection con = (HttpURLConnection)url.openConnection();
            /* 允许Input、Output，不使用Cache */
            con.setDoInput(true);
            con.setDoOutput(true);
            con.setUseCaches(false);
            /* 设置传送的method=POST */
            con.setRequestMethod("POST");
            /* setRequestProperty */
            con.setRequestProperty("Connection", "Keep-Alive");
            con.setRequestProperty("Charset", "UTF-8");
            con.setRequestProperty("Content-Type", "multipart/form-data;boundary=" + boundary);
            /* 设置DataOutputStream */
            DataOutputStream ds = new DataOutputStream(con.getOutputStream());
            ds.writeBytes(twoHyphens + boundary + end);
            ds.writeBytes("Content-Disposition: form-data; " + "name=\"file1\";filename=\""
                    + serverFileName + "\"" + end);
            ds.writeBytes(end);

            /* 取得文件的FileInputStream */
            FileInputStream fStream = new FileInputStream(uploadFile);
            /* 设置每次写入1024bytes */
            int bufferSize = 1024;
            byte[] buffer = new byte[bufferSize];

            int length = -1;
            /* 从文件读取数据至缓冲区 */
            while ((length = fStream.read(buffer)) != -1) {
                /* 将资料写入DataOutputStream中 */
                ds.write(buffer, 0, length);
            }
            ds.writeBytes(end);
            ds.writeBytes(twoHyphens + boundary + twoHyphens + end);

            /* close streams */
            fStream.close();
            ds.flush();

            /* 取得Response内容 */
            InputStream is = con.getInputStream();
            int ch;
            StringBuffer b = new StringBuffer();
            while ((ch = is.read()) != -1) {
                b.append((char)ch);
            }
            /* 将Response显示于Dialog */
            System.out.println("FileUpload Result = " + b.toString());
            
            /* 关闭DataOutputStream */
            ds.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}