微信開發獲取地理位置實例（java，非常詳細，附工程源碼）

1、微信開發之入門教程，該文章詳細講解了企業號體驗號免費申請與一些必要的配置，以及如何調用微信接口。

2、微信開發之通過代理調試本地項目，該文章詳細講解了如何調試本地項目，使用工具的詳細安裝與配置。

3、微信開發之使用java獲取簽名signature（貼源碼，附工程），該文詳細講些了如何獲取簽名，代碼十分詳細。

對於初學者，可能還不知道訂閱號、服務號、和企業號的區別，博主之前也是一直沒有弄清楚，因此查閱資料整理了一篇博客供大家閱讀：微信服務號、訂閱號和企業號的區別（運營和開發兩個角度）。建議有時間得猿友還是閱讀一下為好。

上面的文章內容雖然有點多而且繁瑣，看完之后不敢說已經入門，但是初步了解，自己寫實例是沒有問題的。不積跬步無以至千里，希望猿友們耐心繼續下去！！！！！！

上面的文章內容雖然有點多而且繁瑣，看完之后不敢說已經入門，但是初步了解，自己寫實例是沒有問題的。不積跬步無以至千里，希望猿友們耐心繼續下去！！！！！！

上面的文章內容雖然有點多而且繁瑣，看完之后不敢說已經入門，但是初步了解，自己寫實例是沒有問題的。不積跬步無以至千里，希望猿友們耐心繼續下去！！！！！！

期間可能會遇到一些坑，歡迎與博主評論交流

有了上面的基礎，接下來博主將分享一個具體的微信開發實例，獲取用戶當前的地理位置。

一、結果演示

  
 

二、代碼及代碼講解

本工程使用的環境是eclipse + maven + springmvc，下面附上關鍵代碼，springmvc和web.xml相關配置和maven相關依賴就不一一列舉，最后會附上工程供大家下載。

2.1、獲取簽名工具類（httpclient和sha1加密）

package com.luo.util;

import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.UUID;
import net.sf.json.JSONObject;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.ParseException;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.methods.HttpUriRequest;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.protocol.HTTP;
import org.apache.http.util.EntityUtils;

public class HttpXmlClient {

    public static String post(String url, Map<String, String> params) {
        DefaultHttpClient httpclient = new DefaultHttpClient();
        String body = null;
        HttpPost post = postForm(url, params);
        body = invoke(httpclient, post);
        httpclient.getConnectionManager().shutdown();
        return body;
    }

    public static String get(String url) {
        DefaultHttpClient httpclient = new DefaultHttpClient();
        String body = null;
        HttpGet get = new HttpGet(url);
        body = invoke(httpclient, get);
        httpclient.getConnectionManager().shutdown();
        return body;
    }

    private static String invoke(DefaultHttpClient httpclient,
            HttpUriRequest httpost) {
        HttpResponse response = sendRequest(httpclient, httpost);
        String body = paseResponse(response);
        return body;
    }

    private static String paseResponse(HttpResponse response) {
        HttpEntity entity = response.getEntity();
        String charset = EntityUtils.getContentCharSet(entity);
        String body = null;
        try {
            body = EntityUtils.toString(entity);
        } catch (ParseException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return body;
    }

    private static HttpResponse sendRequest(DefaultHttpClient httpclient,
            HttpUriRequest httpost) {
        HttpResponse response = null;
        try {
            response = httpclient.execute(httpost);
        } catch (ClientProtocolException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return response;
    }

    private static HttpPost postForm(String url, Map<String, String> params) {

        HttpPost httpost = new HttpPost(url);
        List<NameValuePair> nvps = new ArrayList<NameValuePair>();

        Set<String> keySet = params.keySet();
        for (String key : keySet) {
            nvps.add(new BasicNameValuePair(key, params.get(key)));
        }

        try {
            httpost.setEntity(new UrlEncodedFormEntity(nvps, HTTP.UTF_8));
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        }

        return httpost;
    }

    public static void main(String[] args) {

        //獲取access_token
        Map<String, String> params = new HashMap<String, String>();
        params.put("corpid","wx5f24fa0db1819ea2");
        params.put("corpsecret","uQtWzF0bQtl2KRHX0amekjpq8L0aO96LSpSNfctOBLRbuYPO4DUBhMn0_v2jHS-9");
        String xml = HttpXmlClient.post("https://qyapi.weixin.qq.com/cgi-bin/gettoken",params);
        JSONObject jsonMap  = JSONObject.fromObject(xml);
        Map<String, String> map = new HashMap<String, String>();
        Iterator<String> it = jsonMap.keys();  
        while(it.hasNext()) {  
            String key = (String) it.next();  
            String u = jsonMap.get(key).toString();
            map.put(key, u);  
        }
        String access_token = map.get("access_token");
        System.out.println("access_token=" + access_token);

        //獲取ticket
        params.put("access_token",access_token);
        xml = HttpXmlClient.post("https://qyapi.weixin.qq.com/cgi-bin/get_jsapi_ticket",params); 
        jsonMap  = JSONObject.fromObject(xml);
        map = new HashMap<String, String>();
        it = jsonMap.keys();  
        while(it.hasNext()) {  
            String key = (String) it.next();  
            String u = jsonMap.get(key).toString();
            map.put(key, u);  
        }
        String jsapi_ticket = map.get("ticket");
        System.out.println("jsapi_ticket=" + jsapi_ticket);

        //獲取簽名signature
        String noncestr = UUID.randomUUID().toString();
        String timestamp = Long.toString(System.currentTimeMillis() / 1000);
        String url="http://mp.weixin.qq.com";
        String str = "jsapi_ticket=" + jsapi_ticket +
                "&noncestr=" + noncestr +
                "&timestamp=" + timestamp +
                "&url=" + url;
        //sha1加密
        String signature = SHA1(str);
        System.out.println("noncestr=" + noncestr);
        System.out.println("timestamp=" + timestamp);
        System.out.println("signature=" + signature);
        //最終獲得調用微信js接口驗證需要的三個參數noncestr、timestamp、signature
    }

       /** 
     * @author：羅國輝 
     * @date： 2015年12月17日 上午9:24:43 
     * @description： SHA、SHA1加密
     * @parameter：   str：待加密字符串
     * @return：  加密串
    **/
    public static String SHA1(String str) {
        try {
            MessageDigest digest = java.security.MessageDigest
                    .getInstance("SHA-1"); //如果是SHA加密只需要將"SHA-1"改成"SHA"即可
            digest.update(str.getBytes());
            byte messageDigest[] = digest.digest();
            // Create Hex String
            StringBuffer hexStr = new StringBuffer();
            // 字節數組轉換為 十六進制 數
            for (int i = 0; i < messageDigest.length; i++) {
                String shaHex = Integer.toHexString(messageDigest[i] & 0xFF);
                if (shaHex.length() < 2) {
                    hexStr.append(0);
                }
                hexStr.append(shaHex);
            }
            return hexStr.toString();

        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        }
        return null;
    }
}

2.2、controller代碼（盡可能仔細閱讀下面的每一行代碼，特別是url部分）

package com.luo.controller;

import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.UUID;
import javax.servlet.http.HttpServletRequest;
import net.sf.json.JSONObject;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;

import com.luo.util.HttpXmlClient;

@Controller  
public class UserController {  

    @RequestMapping("/")    
    public ModelAndView getIndex(HttpServletRequest request){  

        ModelAndView mav = new ModelAndView("index");  
        //獲取access_token
        Map<String, String> params = new HashMap<String, String>();
        params.put("corpid","wx7099477f2de8aded");
        params.put("corpsecret","4clWzENvHVmpcyuA4toys0URkfYanIqWtxZ5plbisn6Cd5AVTF0thpaK6UAhjIvN");
        String xml = HttpXmlClient.post("https://qyapi.weixin.qq.com/cgi-bin/gettoken",params);
        JSONObject jsonMap  = JSONObject.fromObject(xml);
        Map<String, String> map = new HashMap<String, String>();
        Iterator<String> it = jsonMap.keys();  
        while(it.hasNext()) {  
            String key = (String) it.next();  
            String u = jsonMap.get(key).toString();
            map.put(key, u);  
        }
        String access_token = map.get("access_token");

        //獲取ticket
        params.put("access_token",access_token);
        xml = HttpXmlClient.post("https://qyapi.weixin.qq.com/cgi-bin/get_jsapi_ticket",params); 
        jsonMap  = JSONObject.fromObject(xml);
        map = new HashMap<String, String>();
        it = jsonMap.keys();  
        while(it.hasNext()) {  
            String key = (String) it.next();  
            String u = jsonMap.get(key).toString();
            map.put(key, u);  
        }
        String jsapi_ticket = map.get("ticket");


        //獲取簽名signature
        String noncestr = UUID.randomUUID().toString();
        String timestamp = Long.toString(System.currentTimeMillis() / 1000);
        //獲取請求url
        String path = request.getContextPath();
        //以為我配置的菜單是http://yo.bbdfun.com/first_maven_project/，最后是有"/"的，所以url也加上了"/"
        String url = request.getScheme() + "://" + request.getServerName() +  path + "/";  
        String str = "jsapi_ticket=" + jsapi_ticket +
                "&noncestr=" + noncestr +
                "&timestamp=" + timestamp +
                "&url=" + url;
        //sha1加密
        String signature = HttpXmlClient.SHA1(str);
        mav.addObject("signature", signature);   
        mav.addObject("timestamp", timestamp);   
        mav.addObject("noncestr", noncestr);   
        mav.addObject("appId", "wx7099477f2de8aded"); 
        System.out.println("jsapi_ticket=" + jsapi_ticket);
        System.out.println("noncestr=" + noncestr);
        System.out.println("timestamp=" + timestamp);
        System.out.println("url=" + url);
        System.out.println("str=" + str);
        System.out.println("signature=" + signature);
        return mav;    

    }    
}  

2.3、前端js代碼（盡可能仔細閱讀下面的每一行代碼）

<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<html>
<head>
<script src="http://res.wx.qq.com/open/js/jweixin-1.0.0.js"></script>
<script>
    wx.config({
        debug: true, // 開啟調試模式,調用的所有api的返回值會在客戶端alert出來，若要查看傳入的參數，可以在pc端打開，參數信息會通過log打出，僅在pc端時才會打印。
        appId: '${appId}', // 必填，企業號的唯一標識，此處填寫企業號corpid
        timestamp: parseInt("${timestamp}",10), // 必填，生成簽名的時間戳
        nonceStr: '${noncestr}', // 必填，生成簽名的隨機串
        signature: '${signature}',// 必填，簽名，見附錄1
        jsApiList: ['getLocation'] // 必填，需要使用的JS接口列表，所有JS接口列表見附錄2
    });
    wx.ready(function(){
    });

    wx.error(function(res){
    });
</script>
</head>
<body>
<button id="getBBS" style="width:1000px;height:600px;font-size:150px;" onclick="submitOrderInfoClick();">獲取地理位置</button>
</body>
<script type="text/javascript">
function submitOrderInfoClick(){
  wx.getLocation({
        success: function (res) {
            alert("大寶獲取地理位置成功，經緯度為：（" + res.latitude + "，" + res.longitude + "）" );
        },
        fail: function(error) {
            AlertUtil.error("獲取地理位置失敗，請確保開啟GPS且允許微信獲取您的地理位置！");
        }
    });
}
</script>
</html>