WechatUtils.java example

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dk-master
package com.hehenian.wechat.exchange;

import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.ConnectException;
import java.net.URL;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;

import javax.net.ssl.HttpsURLConnection;
import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLSocketFactory;
import javax.net.ssl.TrustManager;
import javax.net.ssl.X509TrustManager;

/**
 * 微信客户端
 * @author duanhrmf
 *
 */
public class WechatUtils {
	private static final String WX_ACCESS_TOKEN_URL ="https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=APPID&secret=APPSECRET";

	/**
	 * 获取access_token
	 * 
	 * @param appid
	 *            凭证
	 * @param appsecret
	 *            密钥
	 * @return
	 */
	public static WechatResult getAccessToken(String appid, String appsecret) {
		String requestUrl = WX_ACCESS_TOKEN_URL.replace("APPID", appid).replace(
					"APPSECRET", appsecret);
		return httpRequest(requestUrl, "GET", null);

	}
	
	/**
	 * 发起https请求并获取结果
	 * 
	 * @param requestUrl
	 *            请求地址
	 * @param requestMethod
	 *            请求方式（GET、POST）
	 * @param outputStr
	 *            提交的数据
	 * @return JSONObject(通过JSONObject.get(key)的方式获取json对象的属性值)
	 */
	public static WechatResult httpRequest(String requestUrl,
			String requestMethod, String outputStr) {
		WechatResult result = null;
		StringBuffer buffer = new StringBuffer();
		try {
			// 创建SSLContext对象，并使用我们指定的信任管理器初始化
			TrustManager[] tm = { new MyX509TrustManager() };
			SSLContext sslContext = SSLContext.getInstance("SSL", "SunJSSE");
			sslContext.init(null, tm, new java.security.SecureRandom());
			
			
			
			// 从上述SSLContext对象中得到SSLSocketFactory对象
			SSLSocketFactory ssf = sslContext.getSocketFactory();

			URL url = new URL(requestUrl);
			HttpsURLConnection httpUrlConn = (HttpsURLConnection) url
					.openConnection();
			httpUrlConn.setSSLSocketFactory(ssf);
			httpUrlConn.setDoOutput(true);
			httpUrlConn.setDoInput(true);
			httpUrlConn.setUseCaches(false);
			// 设置请求方式（GET/POST）
			httpUrlConn.setRequestMethod(requestMethod);
			

			if ("GET".equalsIgnoreCase(requestMethod))
				httpUrlConn.connect();

			// 当有数据需要提交时
			if (null != outputStr) {
				OutputStream outputStream = httpUrlConn.getOutputStream();
				// 注意编码格式，防止中文乱码
				outputStream.write(outputStr.getBytes("UTF-8"));
				outputStream.close();
			}

			// 将返回的输入流转换成字符串
			InputStream inputStream = httpUrlConn.getInputStream();
			InputStreamReader inputStreamReader = new InputStreamReader(
					inputStream, "utf-8");
			BufferedReader bufferedReader = new BufferedReader(
					inputStreamReader);

			String str = null;
			while ((str = bufferedReader.readLine()) != null) {
				buffer.append(str);
			}
			bufferedReader.close();
			inputStreamReader.close();
			// 释放资源
			inputStream.close();
			inputStream = null;
			httpUrlConn.disconnect();
			result = JsonUtil.translate(buffer.toString());
		} catch (ConnectException ce) {
			System.out.println("Weixin  OR YiXin server connection timed out.");
			ce.printStackTrace();
		} catch (Exception e) {
			System.out.println("https request error:{}"+ e);
		}
		return result;
	}
	
	
	static class MyX509TrustManager implements X509TrustManager {
			
			public void checkClientTrusted(X509Certificate[] chain, String authType)
					throws CertificateException {
			}
		
			public void checkServerTrusted(X509Certificate[] chain, String authType)
					throws CertificateException {
			}
		
			public X509Certificate[] getAcceptedIssuers() {
				return null;
			}
		}
}