<script src="http://res.wx.qq.com/open/js/jweixin-1.0.0.js"></script>

//分享核心js代碼
$(document).ready(function () {
  //通過ajax，在頁面加載的時(shí)候獲取微信分享接口signature，nonceStr，timestamp 和appId
  $.ajax({
    type: "post",
    url: "/weixin/share",
    dataType: "json",
    data:"url="+window.location.href,
    success: function (data) {
      wx.config({
        debug: false,
        appId: data.appId,
        timestamp: data.timestamp,
        nonceStr: data.nonceStr,
        signature: data.signature,
        jsApiList: ['onMenuShareAppMessage', 'onMenuShareTimeline', 'hideAllNonBaseMenuItem', 'showMenuItems']
        // 功能列表，我們要使用JS-SDK的什么功能
      });
      wx.ready(function () {
        // 獲取“分享給朋友”按鈕點(diǎn)擊狀態(tài)及自定義分享內(nèi)容接口
        wx.onMenuShareAppMessage({
          title: "分享自定義標(biāo)題", // 分享標(biāo)題
          desc: "分享自定義描述", // 分享描述
          link: "http://localhost/weixin/share?openId=1",//分享點(diǎn)擊之后的鏈接
          imgUrl:'/images/photo/1.jpg', // 分享圖標(biāo)
          type: 'link', // 分享類型,music、video或link，不填默認(rèn)為link
          success: function () {
            //成功之后的回調(diào)
          }
        });
        wx.hideAllNonBaseMenuItem();
        wx.showMenuItems({
          menuList: ['menuItem:share:appMessage', 'menuItem:share:timeline'] // 要隱藏的菜單項(xiàng)，只能隱藏“傳播類”和“保護(hù)類”按鈕，所有menu項(xiàng)見附錄3
        });
        wx.onMenuShareTimeline({
          title: "分享自定義標(biāo)題", // 分享標(biāo)題
          desc: "分享自定義描述", // 分享描述
          link: "http://localhost/weixin/share?openId=1",//分享點(diǎn)擊之后的鏈接
          imgUrl:'/images/photo/1.jpg', // 分享圖標(biāo)
          type: 'link', // 分享類型,music、video或link，不填默認(rèn)為link
          success: function () {
            //成功之后的回調(diào)
          }
          cancel: function () {
            // 用戶取消分享后執(zhí)行的回調(diào)函數(shù)
          }
        });
      });
      wx.error(function (res) {
        //打印錯(cuò)誤消息。及把 debug:false,設(shè)置為debug:ture就可以直接在網(wǎng)頁上看到彈出的錯(cuò)誤提示
      });
    }
  })
});

@RequestMapping(value = "/share", method = RequestMethod.POST)
  @ResponseBody
  public Map<String, Object> share(HttpServletRequest request) {
    String urlTemp = "http://" + request.getServerName() + request.getContextPath();
    String urlpath = "http://" + request.getServerName();
    String appUrl = request.getParameter("url");
    if (request.getParameter("code") != null) {
      appUrl += "&code=" + request.getParameter("code");
    }
    if (request.getParameter("state") != null) {
      appUrl += "&state=" + request.getParameter("state");
    }
    return WxConfigUtil.getSignature(appUrl, ContentValues.APPID, ContentValues.SECRET, urlTemp, urlpath);
  }

package com.blog.common.util;

import com.alibaba.fastjson.JSONObject;
import com.blog.common.model.Token;

import javax.net.ssl.HttpsURLConnection;
import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLSocketFactory;
import javax.net.ssl.TrustManager;
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.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.Arrays;
import java.util.HashMap;
import java.util.Map;


/**
 * 公眾平臺通用接口工具類
 *
 * @author james
 * @date 2015-02-27
 */
public class WxConfigUtil {
  // 獲取access_token的接口地址（GET） 限2000（次/天）
  public final static String access_token_url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=APPID&secret=APPSECRET";
  // 獲取jsapi_ticket的接口地址（GET） 限2000（次/天）
  public final static String jsapi_ticket_url = "https://api.weixin.qq.com/cgi-bin/ticket/getticket?access_token=ACCESS_TOKEN&type=jsapi";
  // 緩存添加的時(shí)間
  public static String cacheAddTime = null;
  // token,ticket緩存
  public static Map<String, Token> TOKEN_TICKET_CACHE = new HashMap<String, Token>();
  // token對應(yīng)的key
  private static final String TOKEN = "token";
  // ticket對應(yīng)的key
  private static final String TICKET = "ticket";

  /**
   * 外部獲取簽名入口類
   *
   * @param appUrl  應(yīng)用的url
   * @return
   */
  public static Map<String, Object> getSignature(String appUrl, String appId, String secret, String url, String urlpath) {
    // 生成簽名的隨機(jī)串
    String noncestr = RandomUtil.getStringRandom(4);
    if (appUrl == null || "".equals(appUrl)) {
      return null;
    }
    String signature = null;
    Token accessTocken = getToken(appId, secret, System.currentTimeMillis() / 1000);
    Token accessTicket = getTicket(accessTocken.getToken(), System.currentTimeMillis() / 1000);
    signature = signature(accessTicket.getTicket(), cacheAddTime, noncestr, appUrl);
    System.out.println("-=-=-=-=-=-=-=-=appUrl:" + appUrl);
    System.out.println("-=-=-=-=-=-=-=-=token:" + accessTocken.getToken());
    System.out.println("-=-=-=-=-=-=-=-=ticket:" + accessTicket.getTicket());
    System.out.println("-=-=-=-=-=-=-=-=signature:" + signature);
    System.out.println("-=-=-=-=-=-=-=-=timestamp:" + cacheAddTime);
    Map<String, Object> map = new HashMap<>();
    map.put("appId", appId);
    map.put("timestamp", cacheAddTime);
    map.put("nonceStr", noncestr);
    map.put("appUrl", appUrl);
    map.put("signature", signature);
    map.put("url", url);
    map.put("urlpath", urlpath);
    return map;
  }

  /**
   * 獲得Token
   *
   * @return
   */
  public static String getToken(String appId, String secret) {
    Token accessTocken = getToken(appId, secret, System.currentTimeMillis() / 1000);
    return accessTocken.getToken();
  }

  /**
   * 簽名
   *
   * @param timestamp
   * @return
   */
  private static String signature(String jsapi_ticket, String timestamp, String noncestr, String url) {
    jsapi_ticket = "jsapi_ticket=" + jsapi_ticket;
    timestamp = "timestamp=" + timestamp;
    noncestr = "noncestr=" + noncestr;
    url = "url=" + url;
    String[] arr = new String[]{jsapi_ticket, noncestr, timestamp, url};
    // 將token、timestamp、nonce,url參數(shù)進(jìn)行字典序排序
    Arrays.sort(arr);
    StringBuilder content = new StringBuilder();
    for (int i = 0; i < arr.length; i++) {
      content.append(arr[i]);
      if (i != arr.length - 1) {
        content.append("&");
      }
    }
    MessageDigest md = null;
    String tmpStr = null;

    try {
      md = MessageDigest.getInstance("SHA-1");
      // 將三個(gè)參數(shù)字符串拼接成一個(gè)字符串進(jìn)行sha1加密
      byte[] digest = md.digest(content.toString().getBytes());
      tmpStr = byteToStr(digest);
    } catch (NoSuchAlgorithmException e) {
      e.printStackTrace();
    }

    content = null;
    return tmpStr;
  }

  /**
   * 獲取access_token
   *
   * @param appid   憑證
   * @param appsecret 密鑰
   * @return
   */
  public static Token getToken(String appid, String appsecret, long currentTime) {
    Token tockenTicketCache = getTokenTicket(TOKEN);
    Token Token = null;

    if (tockenTicketCache != null && (currentTime - tockenTicketCache.getAddTime() <= tockenTicketCache.getExpiresIn())) {// 緩存存在并且沒過期
      System.out.println("==========緩存中token已獲取時(shí)長為：" + (currentTime - tockenTicketCache.getAddTime()) + "毫秒，可以重新使用");
      return tockenTicketCache;
    }
    System.out.println("==========緩存中token不存在或已過期===============");
    String requestUrl = access_token_url.replace("APPID", appid).replace("APPSECRET", appsecret);
    JSONObject jsonObject = httpRequest(requestUrl, "GET", null);
    // 如果請求成功
    if (null != jsonObject) {
      Token = new Token();
      Token.setToken(jsonObject.getString("access_token"));
      Token.setExpiresIn(jsonObject.getIntValue("expires_in") / 2);// 正常過期時(shí)間是7200秒，此處設(shè)置3600秒讀取一次
      System.out.println("==========tocket緩存過期時(shí)間為:" + Token.getExpiresIn() + "毫秒");
      Token.setAddTime(currentTime);
      updateToken(TOKEN, Token);
    }
    return Token;
  }

  /**
   * 獲取ticket
   *
   * @param token
   * @return
   */
  private static Token getTicket(String token, long currentTime) {
    Token tockenTicketCache = getTokenTicket(TICKET);
    Token Token = null;
    if (tockenTicketCache != null && (currentTime - tockenTicketCache.getAddTime() <= tockenTicketCache.getExpiresIn())) {// 緩存中有ticket
      System.out.println("==========緩存中ticket已獲取時(shí)長為：" + (currentTime - tockenTicketCache.getAddTime()) + "毫秒，可以重新使用");
      return tockenTicketCache;
    }
    System.out.println("==========緩存中ticket不存在或已過期===============");
    String requestUrl = jsapi_ticket_url.replace("ACCESS_TOKEN", token);
    JSONObject jsonObject = httpRequest(requestUrl, "GET", null);
    // 如果請求成功
    if (null != jsonObject) {
      Token = new Token();
      Token.setTicket(jsonObject.getString("ticket"));
      Token.setExpiresIn(jsonObject.getIntValue("expires_in") / 2);// 正常過期時(shí)間是7200秒，此處設(shè)置3600秒讀取一次
      System.out.println("==========ticket緩存過期時(shí)間為:" + Token.getExpiresIn() + "毫秒");
      Token.setAddTime(currentTime);
      updateToken(TICKET, Token);
    }
    return Token;
  }

  /**
   * 發(fā)起https請求并獲取結(jié)果
   *
   * @param requestUrl  請求地址
   * @param requestMethod 請求方式（GET、POST）
   * @param outputStr   提交的數(shù)據(jù)
   * @return JSONObject(通過JSONObject.get(key)的方式獲取json對象的屬性值)
   */
  private static JSONObject httpRequest(String requestUrl, String requestMethod, String outputStr) {
    JSONObject jsonObject = null;
    StringBuffer buffer = new StringBuffer();
    try {
      // 創(chuàng)建SSLContext對象，并使用我們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());
      // 從上述SSLContext對象中得到SSLSocketFactory對象
      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);
      // 設(shè)置請求方式（GET/POST）
      httpUrlConn.setRequestMethod(requestMethod);

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

      // 當(dāng)有數(shù)據(jù)需要提交時(shí)
      if (null != outputStr) {
        OutputStream outputStream = httpUrlConn.getOutputStream();
        // 注意編碼格式，防止中文亂碼
        outputStream.write(outputStr.getBytes("UTF-8"));
        outputStream.close();
      }

      // 將返回的輸入流轉(zhuǎn)換成字符串
      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();
      // 釋放資源
      inputStream.close();
      inputStream = null;
      httpUrlConn.disconnect();
      jsonObject = JSONObject.parseObject(buffer.toString());
      // jsonObject = JSONObject.fromObject(buffer.toString());
    } catch (ConnectException ce) {
      System.out.println("Weixin server connection timed out.");
    } catch (Exception e) {
      System.out.println("https request error:{}" + e.getMessage());
    }
    return jsonObject;
  }

  /**
   * 將字節(jié)數(shù)組轉(zhuǎn)換為十六進(jìn)制字符串
   *
   * @param byteArray
   * @return
   */
  private static String byteToStr(byte[] byteArray) {
    String strDigest = "";
    for (int i = 0; i < byteArray.length; i++) {
      strDigest += byteToHexStr(byteArray[i]);
    }
    return strDigest;
  }

  /**
   * 將字節(jié)轉(zhuǎn)換為十六進(jìn)制字符串
   *
   * @param mByte
   * @return
   */
  private static String byteToHexStr(byte mByte) {

    char[] Digit = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f'};
    char[] tempArr = new char[2];
    tempArr[0] = Digit[(mByte >>> 4) & 0X0F];
    tempArr[1] = Digit[mByte & 0X0F];

    String s = new String(tempArr);
    return s;
  }

  /**
   * 從緩存中讀取token或者ticket
   *
   * @return
   */
  private static Token getTokenTicket(String key) {
    if (TOKEN_TICKET_CACHE != null && TOKEN_TICKET_CACHE.get(key) != null) {
      System.out.println("==========從緩存中獲取到了" + key + "成功===============");
      return TOKEN_TICKET_CACHE.get(key);
    }
    return null;
  }

  /**
   * 更新緩存中token或者ticket
   *
   * @return
   */
  private static void updateToken(String key, Token accessTocken) {
    if (TOKEN_TICKET_CACHE != null && TOKEN_TICKET_CACHE.get(key) != null) {
      TOKEN_TICKET_CACHE.remove(key);
      System.out.println("==========從緩存中刪除" + key + "成功===============");
    }
    TOKEN_TICKET_CACHE.put(key, accessTocken);
    cacheAddTime = String.valueOf(accessTocken.getAddTime());// 更新緩存修改的時(shí)間
    System.out.println("==========更新緩存中" + key + "成功===============");
  }

}