微信开发获取地理位置实例（java，非常详细，附工程源码）

在本篇博客之前，博主已经写了4篇关于微信相关文章，其中三篇是本文基础：

1、微信开发之入门教程，该文章详细讲解了企业号体验号免费申请与一些必要的配置，以及如何调用微信接口。

2、微信开发之通过代理调试本地项目，该文章详细讲解了如何调试本地项目，使用工具的详细安装与配置。

3、微信开发之使用java获取签名signature（贴源码，附工程），该文详细讲些了如何获取签名，代码十分详细。

对于初学者，可能还不知道订阅号、服务号、和企业号的区别，博主之前也是一直没有弄清楚，因此查阅资料整理了一篇博客供大家阅读：微信服务号、订阅号和企业号的区别（运营和开发两个角度）。建议有时间得猿友还是阅读一下为好。

上面的文章内容虽然有点多而且繁琐，看完之后不敢说已经入门，但是初步了解，自己写实例是没有问题的。不积跬步无以至千里，希望猿友们耐心继续下去！！！！！！

期间可能会遇到一些坑，欢迎与博主评论交流

有了上面的基础，接下来博主将分享一个具体的微信开发实例，获取用户当前的地理位置。

一、结果演示

二、代码及代码讲解

本工程使用的环境是eclipse + maven + springmvc，下面附上关键代码，springmvc和web.xml相关配置和maven相关依赖就不一一列举，最后会附上工程供大家下载。

2.1、获取签名工具类（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) {//获取access_tokenMap<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);//获取ticketparams.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);//获取签名signatureString 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);//最终获得调用微信js接口验证需要的三个参数noncestr、timestamp、signature}/** * @author：罗国辉 * @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加密只需要将"SHA-1"改成"SHA"即可digest.update(str.getBytes());byte messageDigest[] = digest.digest();// Create Hex StringStringBuffer hexStr = new StringBuffer();// 字节数组转换为 十六进制 数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代码（尽可能仔细阅读下面的每一行代码，特别是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");  //获取access_tokenMap<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");//获取ticketparams.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");//获取签名signatureString noncestr = UUID.randomUUID().toString();String timestamp = Long.toString(System.currentTimeMillis() / 1000);//获取请求urlString path = request.getContextPath();//以为我配置的菜单是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代码（尽可能仔细阅读下面的每一行代码）

<%@ 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, // 开启调试模式,调用的所有api的返回值会在客户端alert出来，若要查看传入的参数，可以在pc端打开，参数信息会通过log打出，仅在pc端时才会打印。appId: '${appId}', // 必填，企业号的唯一标识，此处填写企业号corpidtimestamp: parseInt("${timestamp}",10), // 必填，生成签名的时间戳nonceStr: '${noncestr}', // 必填，生成签名的随机串signature: '${signature}',// 必填，签名，见附录1jsApiList: ['getLocation'] // 必填，需要使用的JS接口列表，所有JS接口列表见附录2});wx.ready(function(){});wx.error(function(res){});
</script>
</head>
<body>
<button id="getBBS" style="width:1000px;height:600px;font-size:150px;" onclick="submitOrderInfoClick();">获取地理位置</button>
</body>
<script type="text/javascript">
function submitOrderInfoClick(){wx.getLocation({success: function (res) {alert("小宝鸽获取地理位置成功，经纬度为：（" + res.latitude + "，" + res.longitude + "）" );},fail: function(error) {AlertUtil.error("获取地理位置失败，请确保开启GPS且允许微信获取您的地理位置！");}});
}
</script>
</html>

三、源码下载

http://download.csdn.net/detail/u013142781/9400470

加上这篇文章，博主微信相关文章就有5篇，将会点亮博主微信开发博客专栏（左侧可看到），欢迎订阅。

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