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) {
		//檔名
		String filepath = "C:\\a.gif";
		//請求地址
		String urlStr = "http://localhost:8888/CustomUpload/CustomUploadAction!imgUpload.do";
		Map<String, String> fieldMap = new HashMap<String, String>();
		//表單欄位對映
		fieldMap.put("upFileFileName", "a.gif");
		//要上傳的檔案
		Map<String, String> filesMap = new HashMap<String, String>();
		filesMap.put("upFile", filepath);
		String result = uploadFormFile(urlStr, fieldMap, filesMap);
		System.out.println(result);
	}

	/**
	 * 上傳圖片form
	 * @param urlStr 地址
	 * @param textMap form欄位型別
	 * @param fileMap 檔案上傳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());
			//文字域 
			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"));
			}

			// 上傳檔案  
			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();
			// 讀取返回資料  
			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("上傳檔案請求失敗！" + urlStr);
			e.printStackTrace();
		} finally {
			if (conn != null) {
				conn.disconnect();
				conn = null;
			}
		}
		return result;
	}

}