获取微信用户基本信息

1.微信使用https协议，so，编写https工具类：

package com.lishidao.app.controller;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.StringWriter;
import java.net.HttpURLConnection;
import java.net.URL;
import java.security.SecureRandom;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;

import javax.net.ssl.HostnameVerifier;
import javax.net.ssl.HttpsURLConnection;
import javax.net.ssl.KeyManager;
import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLSession;
import javax.net.ssl.TrustManager;
import javax.net.ssl.X509TrustManager;

import org.apache.commons.lang.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class HttpsUtil {

	/** log记录 */
	protected static final Logger log = LoggerFactory
			.getLogger(HttpsUtil.class);

	private static final String METHOD_POST = "POST";
	private static final String DEFAULT_CHARSET = "utf-8";

	public static String doPost(String url, String params, String charset,
			int connectTimeout, int readTimeout) throws Exception {
		String ctype = "application/json;charset=" + charset;
		byte[] content = {};
		if (params != null) {
			content = params.getBytes(charset);
		}

		return doPost(url, ctype, content, connectTimeout, readTimeout);
	}

	public static String doPost(String url, String ctype, byte[] content,
			int connectTimeout, int readTimeout) throws Exception {
		HttpsURLConnection conn = null;
		OutputStream out = null;
		String rsp = null;
		try {
			try {
				SSLContext ctx = SSLContext.getInstance("TLS");
				ctx.init(new KeyManager[0],
						new TrustManager[] { new DefaultTrustManager() },
						new SecureRandom());
				SSLContext.setDefault(ctx);

				conn = getConnection(new URL(url), METHOD_POST, ctype);
				conn.setHostnameVerifier(new HostnameVerifier() {
					@Override
					public boolean verify(String hostname, SSLSession session) {
						return true;
					}
				});
				conn.setConnectTimeout(connectTimeout);
				conn.setReadTimeout(readTimeout);
			} catch (Exception e) {
				log.error("GET_CONNECTOIN_ERROR, URL = " + url, e);
				throw e;
			}
			try {
				out = conn.getOutputStream();
				out.write(content);
				rsp = getResponseAsString(conn);
			} catch (IOException e) {
				log.error("REQUEST_RESPONSE_ERROR, URL = " + url, e);
				throw e;
			}

		} finally {
			if (out != null) {
				out.close();
			}
			if (conn != null) {
				conn.disconnect();
			}
		}

		return rsp;
	}

	private static class DefaultTrustManager implements X509TrustManager {

		@Override
		public void checkClientTrusted(X509Certificate[] arg0, String arg1)
				throws CertificateException {
		}

		@Override
		public void checkServerTrusted(X509Certificate[] arg0, String arg1)
				throws CertificateException {
		}

		@Override
		public X509Certificate[] getAcceptedIssuers() {
			return null;
		}

	}

	private static HttpsURLConnection getConnection(URL url, String method,
			String ctype) throws IOException {
		HttpsURLConnection conn = (HttpsURLConnection) url.openConnection();
		conn.setRequestMethod(method);
		conn.setDoInput(true);
		conn.setDoOutput(true);
		conn.setRequestProperty("Accept", "text/xml,text/javascript,text/html");
		conn.setRequestProperty("User-Agent", "stargate");
		conn.setRequestProperty("Content-Type", ctype);
		return conn;
	}

	protected static String getResponseAsString(HttpURLConnection conn)
			throws IOException {
		String charset = getResponseCharset(conn.getContentType());
		InputStream es = conn.getErrorStream();
		if (es == null) {
			return getStreamAsString(conn.getInputStream(), charset);
		} else {
			String msg = getStreamAsString(es, charset);
			if (StringUtils.isEmpty(msg)) {
				throw new IOException(conn.getResponseCode() + ":"
						+ conn.getResponseMessage());
			} else {
				throw new IOException(msg);
			}
		}
	}

	private static String getStreamAsString(InputStream stream, String charset)
			throws IOException {
		try {
			BufferedReader reader = new BufferedReader(new InputStreamReader(
					stream, charset));
			StringWriter writer = new StringWriter();

			char[] chars = new char[256];
			int count = 0;
			while ((count = reader.read(chars)) > 0) {
				writer.write(chars, 0, count);
			}

			return writer.toString();
		} finally {
			if (stream != null) {
				stream.close();
			}
		}
	}

	private static String getResponseCharset(String ctype) {
		String charset = DEFAULT_CHARSET;

		if (!StringUtils.isEmpty(ctype)) {
			String[] params = ctype.split(";");
			for (String param : params) {
				param = param.trim();
				if (param.startsWith("charset")) {
					String[] pair = param.split("=", 2);
					if (pair.length == 2) {
						if (!StringUtils.isEmpty(pair[1])) {
							charset = pair[1].trim();
						}
					}
					break;
				}
			}
		}

		return charset;
	}
	
	public static void main(String[] args) throws Exception{
		String url = "https://www.baidu.com";
		String params = "v=1&r=2";
		String result = HttpsUtil.doPost(url, params, "UTF-8", 5000, 5000);
		System.out.println(result);
	}
}

2.编写微信用户基本信息对应类。

package com.lishidao.app.controller;

public class WeiXinUser {
	public String subscribe;
	public String openid;
	public String nickname;
	public String sex;
	public String language;
	public String city;
	public String province;
	public String country;
	public String headimgurl;
	public String subscribe_time;
	public String unionid;

	public String getSubscribe() {
		return subscribe;
	}

	public void setSubscribe(String subscribe) {
		this.subscribe = subscribe;
	}

	public String getOpenid() {
		return openid;
	}

	public void setOpenid(String openid) {
		this.openid = openid;
	}

	public String getNickname() {
		return nickname;
	}

	public void setNickname(String nickname) {
		this.nickname = nickname;
	}

	public String getSex() {
		return sex;
	}

	public void setSex(String sex) {
		this.sex = sex;
	}

	public String getLanguage() {
		return language;
	}

	public void setLanguage(String language) {
		this.language = language;
	}

	public String getCity() {
		return city;
	}

	public void setCity(String city) {
		this.city = city;
	}

	public String getProvince() {
		return province;
	}

	public void setProvince(String province) {
		this.province = province;
	}

	public String getCountry() {
		return country;
	}

	public void setCountry(String country) {
		this.country = country;
	}

	public String getHeadimgurl() {
		return headimgurl;
	}

	public void setHeadimgurl(String headimgurl) {
		this.headimgurl = headimgurl;
	}

	public String getSubscribe_time() {
		return subscribe_time;
	}

	public void setSubscribe_time(String subscribe_time) {
		this.subscribe_time = subscribe_time;
	}

	public String getUnionid() {
		return unionid;
	}

	public void setUnionid(String unionid) {
		this.unionid = unionid;
	}

	public String toString() {
		return subscribe + "|" + openid + "|" + nickname + "|" + sex + "|"
				+ language + "|" + city + "|" + province + "|" + country + "|"
				+ headimgurl + "|" + subscribe_time + "|" + unionid;
	}

}

3.编写微信工具类

package com.lishidao.app.controller;

import java.util.Date;
import java.util.HashMap;
import java.util.Map;

import com.alibaba.fastjson.JSONObject;

import framecore.util.DateUtil;

public class WeiXinUtil {

	private static final Map<String, String> tokenMap = new HashMap<String, String>();
	private static String appid = "APPID";
	private static String secret = "SECRET";

	public static String getToken() throws Exception {
		System.out.println("get token start......");
		String key = DateUtil.getDateShortString(new Date());
		if (tokenMap.containsKey(key)) {
			String token = tokenMap.get(key);
			System.out.println("tokenMap.token:" + token);
			System.out.println("get token end......");
			return token;
		}

		String url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid="
				+ appid + "&secret=" + secret;
		String jsonStr = HttpsUtil.doPost(url, "", "UTF-8", 10000, 10000);
		System.out.println(jsonStr);
		JSONObject json = (JSONObject) JSONObject.parse(jsonStr);
		String token = json.getString("access_token");
		tokenMap.clear();
		tokenMap.put(key, token);
		System.out.println("getToken:" + token);
		System.out.println("get token end......");
		return token;
	}

	public static WeiXinUser getWeiXinUser(String openid) throws Exception {
		System.out.println("get user start......");
		String token = getToken();
		String url = "https://api.weixin.qq.com/cgi-bin/user/info?access_token="
				+ token + "&openid=" + openid + "&lang=zh_CN";
		String jsonStr = HttpsUtil.doPost(url, "", "UTF-8", 10000, 10000);
		System.out.println(jsonStr);
		JSONObject json = (JSONObject) JSONObject.parse(jsonStr);
		WeiXinUser weiXinUser = JSONObject.toJavaObject(json, WeiXinUser.class);
		System.out.println("get user end......");
		return weiXinUser;
	}

	public static String getViewOpenid(String code) throws Exception {
		System.out.println("get openid start......");
		String url = "https://api.weixin.qq.com/sns/oauth2/access_token?appid="
				+ appid + "&secret=" + secret + "&code=" + code
				+ "&grant_type=authorization_code";
		String jsonStr = HttpsUtil.doPost(url, "", "UTF-8", 10000, 10000);
		System.out.println(jsonStr);
		JSONObject json = (JSONObject) JSONObject.parse(jsonStr);
		String openid = json.getString("openid");
		System.out.println("get openid end......");
		return openid;
	}

	public static void main(String[] args) throws Exception {
		WeiXinUtil.getToken();
		WeiXinUtil.getToken();
		WeiXinUtil.getToken();

		String code = "code";
		WeiXinUtil.getViewOpenid(code);

		String openid = "openid";
		WeiXinUtil.getWeiXinUser(openid);

	}
}