HttpURLConnection 提交表单+ 上传文件

package com.customUpload.utils;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 net.sf.jmimemagic.Magic;import net.sf.jmimemagic.MagicMatch;public class HttpUploadUtil { public static void main(String[] args) {//文件名String filepath = "C:\\a.gif";//请求地址String urlStr = "http://localhost:8888/CustomUpload/CustomUploadAction!imgUpload.do";Map<String, String> fieldMap = new HashMap<String, String>();//表单字段映射fieldMap.put("upFileFileName", "a.gif");//要上传的文件Map<String, String> filesMap = new HashMap<String, String>();filesMap.put("upFile", filepath);String result = uploadFormFile(urlStr, fieldMap, filesMap);System.out.println(result);}/** * 上传图片form * @param urlStr 地址 * @param textMap form字段类型 * @param fileMap 文件上传map * @return * @author wall * @date 2015-8-6 */public static String uploadFormFile(String urlStr, Map<String, String> textMap, Map<String, String> fileMap) {String result = "";HttpURLConnection conn = null;//分隔符String finalSplit = "---------------------------123821742118716";  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=" + finalSplit);OutputStream out = new DataOutputStream(conn.getOutputStream());//文本域 if (textMap != null) {StringBuffer strBuf = new StringBuffer();Iterator<Map.Entry<String, String>> iter = textMap.entrySet().iterator();while (iter.hasNext()) {Map.Entry<String, String> entry = iter.next();String inputName = (String) entry.getKey();String inputValue = (String) entry.getValue();if (inputValue == null) {continue;}inputValue = new String(inputValue.getBytes("GBK"));strBuf.append("\r\n").append("--").append(finalSplit).append("\r\n");strBuf.append("Content-Disposition: form-data; name=\"" + inputName + "\"\r\n\r\n");strBuf.append(inputValue);}out.write(strBuf.toString().getBytes("UTF-8"));}// 上传文件  if (fileMap != null) {Iterator<Map.Entry<String, String>> iter = fileMap.entrySet().iterator();while (iter.hasNext()) {Map.Entry<String, String> entry = iter.next();String inputName = (String) entry.getKey();String inputValue = (String) entry.getValue();if (inputValue == null) {continue;}File file = new File(inputValue);String filename = file.getName();MagicMatch match = Magic.getMagicMatch(file, false, true);String contentType = match.getMimeType();StringBuffer strBuf = new StringBuffer();strBuf.append("\r\n").append("--").append(finalSplit).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 = ( "\r\n--" + finalSplit + "--\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");}result = strBuf.toString();reader.close();reader = null;} catch (Exception e) {System.out.println("上传文件请求失败！" + urlStr);e.printStackTrace();} finally {if (conn != null) {conn.disconnect();conn = null;}}return result;}}