package com.yanek.util;import java.io.BufferedReader;import java.io.DataInputStream;import java.io.DataOutputStream;import java.io.File;import java.io.FileInputStream;import java.io.InputStreamReader;import java.io.OutputStream;import java.net.HttpURLConnection;import java.net.URL;import java.util.HashMap;import java.util.Iterator;import java.util.Map;import javax.activation.MimetypesFileTypeMap;import net.sf.json.JSONArray;import net.sf.json.JSONObject;public class HttpPostUploadUtil {    /**     * @param args     */    public static void main(String[] args) {                String filepath="E:\\ziliao\\0.jpg";                String urlStr = "http://127.0.0.1:8080/minicms/up/up_result.jsp";                Map<String, String> textMap = new HashMap<String, String>();            textMap.put("name", "testname");        Map<String, String> fileMap = new HashMap<String, String>();                fileMap.put("userfile", filepath);                String ret = formUpload(urlStr, textMap, fileMap);                System.out.println(ret);            }            /**     * 上传图片     *      * @param urlStr     * @param textMap     * @param fileMap     * @return     */    public static String formUpload(String urlStr, Map<String, String> textMap,            Map<String, String> fileMap) {        String res = "";        HttpURLConnection conn = null;        String BOUNDARY = "---------------------------123821742118716"; //boundary就是request头和上传文件内容的分隔符        try {            URL url = new URL(urlStr);            conn = (HttpURLConnection) url.openConnection();            conn.setConnectTimeout(5000);            conn.setReadTimeout(30000);            conn.setDoOutput(true);            conn.setDoInput(true);            conn.setUseCaches(false);            conn.setRequestMethod("POST");            conn.setRequestProperty("Connection", "Keep-Alive");            conn                    .setRequestProperty("User-Agent",                            "Mozilla/5.0 (Windows; U; Windows NT 6.1; zh-CN; rv:1.9.2.6)");            conn.setRequestProperty("Content-Type",                    "multipart/form-data; boundary=" + BOUNDARY);            OutputStream out = new DataOutputStream(conn.getOutputStream());            // text            if (textMap != null) {                StringBuffer strBuf = new StringBuffer();                Iterator iter = textMap.entrySet().iterator();                while (iter.hasNext()) {                    Map.Entry entry = (Map.Entry) iter.next();                    String inputName = (String) entry.getKey();                    String inputValue = (String) entry.getValue();                    if (inputValue =http://www.mamicode.com/= null) {                        continue;                    }                    strBuf.append("\r\n").append("--").append(BOUNDARY).append(                            "\r\n");                    strBuf.append("Content-Disposition: form-data; name=\""                            + inputName + "\"\r\n\r\n");                    strBuf.append(inputValue);                }                out.write(strBuf.toString().getBytes());            }            // file            if (fileMap != null) {                Iterator iter = fileMap.entrySet().iterator();                while (iter.hasNext()) {                    Map.Entry entry = (Map.Entry) iter.next();                    String inputName = (String) entry.getKey();                    String inputValue = (String) entry.getValue();                    if (inputValue =http://www.mamicode.com/= null) {                        continue;                    }                    File file = new File(inputValue);                    String filename = file.getName();                    String contentType = new MimetypesFileTypeMap()                            .getContentType(file);                    if (filename.endsWith(".png")) {                        contentType = "image/png";                    }                    if (contentType == null || contentType.equals("")) {                        contentType = "application/octet-stream";                    }                    StringBuffer strBuf = new StringBuffer();                    strBuf.append("\r\n").append("--").append(BOUNDARY).append(                            "\r\n");                    strBuf.append("Content-Disposition: form-data; name=\""                            + inputName + "\"; filename=\"" + filename                            + "\"\r\n");                    strBuf.append("Content-Type:" + contentType + "\r\n\r\n");                    out.write(strBuf.toString().getBytes());                    DataInputStream in = new DataInputStream(                            new FileInputStream(file));                    int bytes = 0;                    byte[] bufferOut = new byte[1024];                    while ((bytes = in.read(bufferOut)) != -1) {                        out.write(bufferOut, 0, bytes);                    }                    in.close();                }            }            byte[] endData = http://www.mamicode.com/("\r\n--" + BOUNDARY + "--\r\n").getBytes();            out.write(endData);            out.flush();            out.close();            // 读取返回数据            StringBuffer strBuf = new StringBuffer();            BufferedReader reader = new BufferedReader(new InputStreamReader(                    conn.getInputStream()));            String line = null;            while ((line = reader.readLine()) != null) {                strBuf.append(line).append("\n");            }            res = strBuf.toString();            reader.close();            reader = null;        } catch (Exception e) {            System.out.println("发送POST请求出错。" + urlStr);            e.printStackTrace();        } finally {            if (conn != null) {                conn.disconnect();                conn = null;            }        }        return res;    }}