android post 传参数和图片到服务器

android post 传参数和图片到服务器
原文：http://blog.csdn.net/nosxcy/article/details/8060560
FileUpload.java:

import android.util.Log;import java.io.BufferedReader;import java.io.DataOutputStream;import java.io.File;import java.io.FileInputStream;import java.io.IOException;import java.io.InputStream;import java.io.InputStreamReader;import java.net.HttpURLConnection;import java.net.MalformedURLException;import java.net.URL;import java.util.Map;import java.util.UUID;/** * Created by admin on 2015/7/6. */public class FileUpload {    private static final String TAG = "uploadFile";    private static final int TIME_OUT = 10 * 1000; // 超时时间    private static final String CHARSET = "utf-8"; // 设置编码    /**     * Android上传文件到服务端     *     * @param file       需要上传的文件     * @param RequestURL 请求的rul     * @return 返回响应的内容     */    public static String uploadFile(File file, String RequestURL) {        String result = null;        String BOUNDARY = UUID.randomUUID().toString(); // 边界标识 随机生成        String PREFIX = "--", LINE_END = "\r\n";        String CONTENT_TYPE = "multipart/form-data"; // 内容类型        try {            URL url = new URL(RequestURL);            HttpURLConnection conn = (HttpURLConnection) url.openConnection();            conn.setReadTimeout(TIME_OUT);            conn.setConnectTimeout(TIME_OUT);            conn.setDoInput(true); // 允许输入流            conn.setDoOutput(true); // 允许输出流            conn.setUseCaches(false); // 不允许使用缓存            conn.setRequestMethod("POST"); // 请求方式            conn.setRequestProperty("Charset", CHARSET); // 设置编码            conn.setRequestProperty("connection", "keep-alive");            conn.setRequestProperty("Content-Type", CONTENT_TYPE + ";boundary=" + BOUNDARY);            if (file != null) {                /**                 * 当文件不为空，把文件包装并且上传                 */                DataOutputStream dos = new DataOutputStream(conn.getOutputStream());                StringBuffer sb = new StringBuffer();                sb.append(PREFIX);                sb.append(BOUNDARY);                sb.append(LINE_END);                /**                 * 这里重点注意： name里面的值为服务端需要key 只有这个key 才可以得到对应的文件                 * filename是文件的名字，包含后缀名的 比如:abc.png                 */                sb.append("Content-Disposition: form-data; name=\"uploadfile\"; filename=\""                        + file.getName() + "\"" + LINE_END);                sb.append("Content-Type: application/octet-stream; charset=" + CHARSET + LINE_END);                sb.append(LINE_END);                dos.write(sb.toString().getBytes());                InputStream is = new FileInputStream(file);                byte[] bytes = new byte[1024];                int len = 0;                while ((len = is.read(bytes)) != -1) {                    dos.write(bytes, 0, len);                }                is.close();                dos.write(LINE_END.getBytes());                byte[] end_data = (PREFIX + BOUNDARY + PREFIX + LINE_END).getBytes();                dos.write(end_data);                dos.flush();                /**                 * 获取响应码 200=成功 当响应成功，获取响应的流                 */                int res = conn.getResponseCode();                Log.e(TAG, "response code:" + res);                // if(res==200)                // {                Log.e(TAG, "request success");                InputStream input = conn.getInputStream();                StringBuffer sb1 = new StringBuffer();                int ss;                while ((ss = input.read()) != -1) {                    sb1.append((char) ss);                }                result = sb1.toString();                Log.e(TAG, "result : " + result);                // }                // else{                // Log.e(TAG, "request error");                // }            }        } catch (MalformedURLException e) {            e.printStackTrace();        } catch (IOException e) {            e.printStackTrace();        }        return result;    }    /**     * 通过拼接的方式构造请求内容，实现参数传输以及文件传输     *     * @param url    Service net address     * @param params text content     * @param files  pictures     * @return String result of Service response     * @throws IOException     */    public static String post(String url, Map<String, String> params, Map<String, File> files)            throws IOException {        String BOUNDARY = java.util.UUID.randomUUID().toString();        String PREFIX = "--", LINEND = "\r\n";        String MULTIPART_FROM_DATA = "multipart/form-data";        String CHARSET = "UTF-8";        URL uri = new URL(url);        HttpURLConnection conn = (HttpURLConnection) uri.openConnection();        conn.setReadTimeout(10 * 1000); // 缓存的最长时间        conn.setDoInput(true);// 允许输入        conn.setDoOutput(true);// 允许输出        conn.setUseCaches(false); // 不允许使用缓存        conn.setRequestMethod("POST");        conn.setRequestProperty("connection", "keep-alive");        conn.setRequestProperty("Charsert", "UTF-8");        conn.setRequestProperty("Content-Type", MULTIPART_FROM_DATA + ";boundary=" + BOUNDARY);        // 首先组拼文本类型的参数        StringBuilder sb = new StringBuilder();        for (Map.Entry<String, String> entry : params.entrySet()) {            sb.append(PREFIX);            sb.append(BOUNDARY);            sb.append(LINEND);            sb.append("Content-Disposition: form-data; name=\"" + entry.getKey() + "\"" + LINEND);            sb.append("Content-Type: text/plain; charset=" + CHARSET + LINEND);            sb.append("Content-Transfer-Encoding: 8bit" + LINEND);            sb.append(LINEND);            sb.append(entry.getValue());            sb.append(LINEND);        }        DataOutputStream outStream = new DataOutputStream(conn.getOutputStream());        outStream.write(sb.toString().getBytes());        // 发送文件数据        if (files != null) {            for (Map.Entry<String, File> file : files.entrySet()) {                StringBuilder sb1 = new StringBuilder();                sb1.append(PREFIX);                sb1.append(BOUNDARY);                sb1.append(LINEND);                sb1.append("Content-Disposition: form-data; name=\"uploadfile\"; filename=\""                        + file.getValue().getName() + "\"" + LINEND);                sb1.append("Content-Type: application/octet-stream; charset=" + CHARSET + LINEND);                sb1.append(LINEND);                outStream.write(sb1.toString().getBytes());                InputStream is = new FileInputStream(file.getValue());                byte[] buffer = new byte[1024];                int len = 0;                while ((len = is.read(buffer)) != -1) {                    outStream.write(buffer, 0, len);                }                is.close();                outStream.write(LINEND.getBytes());            }        }        // 请求结束标志        byte[] end_data = (PREFIX + BOUNDARY + PREFIX + LINEND).getBytes();        outStream.write(end_data);        outStream.flush();        // 得到响应码        int res = conn.getResponseCode();        InputStream in = conn.getInputStream();        //----------------------------------------        BufferedReader reader = new BufferedReader(new InputStreamReader(in,"UTF-8"));        StringBuilder sb1 = new StringBuilder();        String line = null;        try {            while ((line = reader.readLine()) != null) {                sb1.append(line + "\n");            }        } catch (IOException e) {            e.printStackTrace();        } finally {            try {                in.close();            } catch (IOException e) {                e.printStackTrace();            }        }        return sb1.toString();        //----------------------------------------        //这里读成了乱码。。。。//        StringBuilder sb2 = new StringBuilder();//        if (res == 200) {//            int ch;//            while ((ch = in.read()) != -1) {//                sb2.append((char) ch);//            }//        }//        outStream.close();//        conn.disconnect();//        return sb2.toString();    }}