java模擬提交post工具類

最近在搞微信開發，問題不少，微信文檔更是毒多得很，接口測試也不解釋清楚，總之麻煩的很，自己寫寫查查，從晚上找了幾段代碼組合做了個工具類，留下筆記，以後再寫到這裏，也好方便一點

package com.wechat.util;

import java.io.BufferedReader;
import java.io.File;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.URL;
import java.net.URLConnection;
import java.util.List;
import java.util.Map;

import org.apache.commons.httpclient.methods.PostMethod;
import org.apache.commons.httpclient.methods.multipart.FilePart;
import org.apache.commons.httpclient.methods.multipart.MultipartRequestEntity;
import org.apache.commons.httpclient.methods.multipart.Part;
import org.apache.http.HttpStatus;

import fr.opensagres.xdocreport.document.json.JSONObject;

public class HttpRequest {
	/**
	 * 向指定URL發�?�GET方法的請�?
	 * 
	 * @param url
	 *            發�?�請求的URL
	 * @param param
	 *            請求參數，請求參數應該是 name1=value1&name2=value2 的形式�??
	 * @return URL �?代表遠程資源的響應結�?
	 */
	public static String sendGet(String url, String param) {
		String result = "";
		BufferedReader in = null;
		try {
			String urlNameString = url + "?" + param;
			URL realUrl = new URL(urlNameString);
			// 打開和URL之間的連�?
			URLConnection connection = realUrl.openConnection();
			// 設置通用的請求屬�?
			connection.setRequestProperty("accept", "*/*");
			connection.setRequestProperty("connection", "Keep-Alive");
			connection.setRequestProperty("user-agent",
					"Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
			// 建立實際的連�?
			connection.connect();
			// 獲取�?有響應頭字段
			Map<String, List<String>> map = connection.getHeaderFields();
			// 遍歷�?有的響應頭字�?
			for (String key : map.keySet()) {
				System.out.println(key + "--->" + map.get(key));
			}
			// 定義 BufferedReader輸入流來讀取URL的響�?
			in = new BufferedReader(new InputStreamReader(
					connection.getInputStream()));
			String line;
			while ((line = in.readLine()) != null) {
				result += line;
			}
		} catch (Exception e) {
			System.out.println("發�?�GET請求出現異常�?" + e);
			e.printStackTrace();
		}
		// 使用finally塊來關閉輸入�?
		finally {
			try {
				if (in != null) {
					in.close();
				}
			} catch (Exception e2) {
				e2.printStackTrace();
			}
		}
		return result;
	}

	/**
	 * 向指�? URL 發�?�POST方法的請�?
	 * 
	 * @param url
	 *            發�?�請求的 URL
	 * @param param
	 *            請求參數，請求參數應該是 name1=value1&name2=value2 的形式�??
	 * @return �?代表遠程資源的響應結�?
	 */
	public static String sendPost(String url, String param) {
		PrintWriter out = null;
		BufferedReader in = null;
		String result = "";
		try {
			URL realUrl = new URL(url);
			// 打開和URL之間的連�?
			URLConnection conn = realUrl.openConnection();
			// 設置通用的請求屬�?
			conn.setRequestProperty("accept", "*/*");
			conn.setRequestProperty("connection", "Keep-Alive");
			conn.setRequestProperty("user-agent",
					"Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
			// 發�?�POST請求必須設置如下兩行
			conn.setDoOutput(true);
			conn.setDoInput(true);
			// 獲取URLConnection對象對應的輸出流
			out = new PrintWriter(conn.getOutputStream());
			// 發�?�請求參�?
			out.print(param);
			// flush輸出流的緩衝
			out.flush();
			// 定義BufferedReader輸入流來讀取URL的響�?
			in = new BufferedReader(
					new InputStreamReader(conn.getInputStream()));
			String line;
			while ((line = in.readLine()) != null) {
				result += line;
			}
		} catch (Exception e) {
			System.out.println("發�?? POST 請求出現異常�?" + e);
			e.printStackTrace();
		}
		// 使用finally塊來關閉輸出流�?�輸入流
		finally {
			try {
				if (out != null) {
					out.close();
				}
				if (in != null) {
					in.close();
				}
			} catch (IOException ex) {
				ex.printStackTrace();
			}
		}
		return result;
	}

	/**
	 * �ϴ���ý���ļ�
	 * 
	 * @param url
	 *            ����url
	 * @param access_token
	 *            access_token
	 * @param type
	 *            �ļ�����
	 * @param file
	 *            �ļ�����
	 * @return
	 */
	public static String uploadImage(String url, String access_token,
			String type, File file) {
		org.apache.commons.httpclient.HttpClient client = new org.apache.commons.httpclient.HttpClient();
		String uploadurl = String.format("%s?access_token=%s&type=%s", url,
				access_token, type);
		PostMethod post = new PostMethod(uploadurl);
		post.setRequestHeader(
				"User-Agent",
				"Mozilla/5.0 (Macintosh; Intel Mac OS X 10.9; rv:30.0) Gecko/20100101 Firefox/30.0");
		post.setRequestHeader("Host", "file.api.weixin.qq.com");
		post.setRequestHeader("Connection", "Keep-Alive");
		post.setRequestHeader("Cache-Control", "no-cache");
		String result = null;
		try {
			if (file != null && file.exists()) {
				FilePart filepart = new FilePart("media", file, "image/jpeg",
						"UTF-8");
				Part[] parts = new Part[] { filepart };
				MultipartRequestEntity entity = new MultipartRequestEntity(
						parts,

						post.getParams());
				post.setRequestEntity(entity);
				int status = client.executeMethod(post);
				if (status == HttpStatus.SC_OK) {
					result = post.getResponseBodyAsString();
				}
			}
		} catch (Exception e) {
			e.printStackTrace();
		} finally {
			return result;
		}
	}

	public static String JsonMediaId(String response) {
		System.out.println(response);
		JSONObject json = new JSONObject(response);
		try {
			return (String) json.get("media_id");
		} catch (Exception e) {
			// TODO: handle exception
		}
		return null;

	}
}