一. 项目需求（举例）

寻主功能需要推送离用户最近的线下门店，系统需要将用户的输入的地址解析为经纬度。再通过经纬度计算哪一家店铺离用户地址最近。

实现地址输入提示，手动输入的地址不完整。

二. 百度地图开发平台

百度地图提供了很多开发的api，方便开发者接入到自己应用中。我们根据用户注册的地址，在百度地图进行标注，方便系统管理员管理

主站地址：http://lbsyun.baidu.com/

  • 注册成功申请成为开发者后，创建应用-申请AK

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    应用名称：项目名
    应用类型：浏览器端
    启用服务：全选，特别是逆地址
    白名单：* - 表示所有网址都可以访问

  • 测试地图功能

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    <!DOCTYPE html>
    <html>
    <head>
        <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
        <meta name="viewport" content="initial-scale=1.0, user-scalable=no" />
        <style type="text/css">
            body, html{width: 100%;height: 100%;margin:0;font-family:"微软雅黑";font-size:14px;}
            #l-map{height:300px;width:100%;}
            #r-result{width:100%;}
        </style>
        <script type="text/javascript" src="//api.map.baidu.com/api?v=2.0&ak=LSNHTIDvIKtkv7UgAUKfStSz4QU74osS"></script>
        <title>关键字输入提示词条</title>
    </head>
    <body>
    <div id="l-map"></div>
    <div id="r-result">请输入:<input type="text" id="suggestId" size="20" value="百度" style="width:150px;" /></div>
    <div id="searchResultPanel" style="border:1px solid #C0C0C0;width:150px;height:auto; display:none;"></div>
    </body>
    </html>
    <script type="text/javascript">
        // 百度地图API功能
        function G(id) {
            return document.getElementById(id);
        }

        var map = new BMap.Map("l-map");
        // map.centerAndZoom("成都",12);     // 初始化地图,设置城市和地图级别。

        var ac = new BMap.Autocomplete(    //建立一个自动完成的对象
            {"input" : "suggestId"
                ,"location" : map
            });

        ac.addEventListener("onhighlight", function(e) {  //鼠标放在下拉列表上的事件
            var str = "";
            var _value = e.fromitem.value;
            var value = "";
            if (e.fromitem.index > -1) {
                value = _value.province +  _value.city +  _value.district +  _value.street +  _value.business;
            }
            str = "FromItem<br />index = " + e.fromitem.index + "<br />value = " + value;

            value = "";
            if (e.toitem.index > -1) {
                _value = e.toitem.value;
                value = _value.province +  _value.city +  _value.district +  _value.street +  _value.business;
            }
            str += "<br />ToItem<br />index = " + e.toitem.index + "<br />value = " + value;
            G("searchResultPanel").innerHTML = str;
        });

        var myValue;
        ac.addEventListener("onconfirm", function(e) {    //鼠标点击下拉列表后的事件
            var _value = e.item.value;
            myValue = _value.province +  _value.city +  _value.district +  _value.street +  _value.business;
            G("searchResultPanel").innerHTML ="onconfirm<br />index = " + e.item.index + "<br />myValue = " + myValue;

            setPlace();
        });

        function setPlace(){
            map.clearOverlays();    //清除地图上所有覆盖物
            function myFun(){
                var pp = local.getResults().getPoi(0).point;    //获取第一个智能搜索的结果
                map.centerAndZoom(pp, 18);
                map.addOverlay(new BMap.Marker(pp));    //添加标注
            }
            var local = new BMap.LocalSearch(map, { //智能搜索
                onSearchComplete: myFun
            });
            local.search(myValue);
        }
    </script>

三. vue集成百度地图api

1. 安装百度地图(在当前项目路径下安装)

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npm install --save vue-baidu-map

2. 全局引入百度地图

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在main.js中引入：

import BaiduMap from 'vue-baidu-map'

Vue.use(BaiduMap, {
    /* Visit http://lbsyun.baidu.com/apiconsole/key for details about app key. */
    ak: '4RWmQlKQkGgdOUuDqaVbkjBg2IY3sjh0'
})

3. 地图展示框

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      <el-form-item prop="address" label="店铺地址">
        <el-input type="text" v-model="shop.address" auto-complete="off" placeholder="请输入地址！"></el-input>
        <el-button size="small" type="primary" @click="selectAddress">选择</el-button>
      </el-form-item>

<!--百度地图-->
<el-dialog
    title="选择地址"
    :visible.sync="dialogVisable"
    width="30%">
  <baidu-map :center="{lng: 104.06, lat: 30.67}" :zoom="11">
    <bm-view class="map"></bm-view>
    <bm-control :offset="{width: '10px', height: '10px'}">
      <bm-auto-complete v-model="keyword" :sugStyle="{zIndex: 2100}">
        <div style="margin-bottom:10px">
          <input id="searchInput" type="text" placeholder="请输入关键字" class="searchinput"/>
          <el-button type="success" @click="selectAddressConfirm">确定</el-button>
        </div>
      </bm-auto-complete>
    </bm-control>
    <bm-local-search :keyword="keyword" :auto-viewport="true" ></bm-local-search>
  </baidu-map>
  <span slot="footer" class="dialog-footer">
    <el-button @click="dialogVisable=false">取 消</el-button>
    <el-button type="primary" @click="selectAddressConfirm">确 定</el-button>
  </span>
</el-dialog>

4. 业务代码

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//百度地址的业务逻辑
selectAddressConfirm() {
  //获取值搜索框值,设置给地址
  var searchInputV = document.getElementById("searchInput").value;
  this.shop.address = searchInputV;
  //关闭对话框
  this.dialogVisable = false;
},
selectAddress() {
  this.dialogVisable = true;
},

四. HTML页面输入地址自动提示

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<!-- 引入百度地图 -->
<script type="text/javascript" src="//api.map.baidu.com/api?v=2.0&ak=LSNHTIDvIKtkv7UgAUKfStSz4QU74osS"></script>

<!-- 引入vue和axios -->
<script src="js/plugins/vue/dist/vue.js"></script>
<script src="js/plugins/axios/dist/axios.js"></script>
<!-- axios全局配置 -->
<script src="js/common.js"></script>

引入js文件

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<script type="text/javascript">
    // 百度地图API功能
    function G(id) {
        return document.getElementById(id);
    }

    var map = new BMap.Map(""); //没有1-map就删除掉，但是必须传递一个值，空字符串都行
    //map.centerAndZoom("北京",12);                   // 初始化地图,设置城市和地图级别。

    var ac = new BMap.Autocomplete(    //建立一个自动完成的对象
        {
            "input": "suggestId"
            , "location": map
        });

    ac.addEventListener("onhighlight", function (e) {  //鼠标放在下拉列表上的事件
        var str = "";
        var _value = e.fromitem.value;
        var value = "";
        if (e.fromitem.index > -1) {
            value = _value.province + _value.city + _value.district + _value.street + _value.business;
        }
        str = "FromItem<br />index = " + e.fromitem.index + "<br />value = " + value;

        value = "";
        if (e.toitem.index > -1) {
            _value = e.toitem.value;
            value = _value.province + _value.city + _value.district + _value.street + _value.business;
        }
        str += "<br />ToItem<br />index = " + e.toitem.index + "<br />value = " + value;
        //G("searchResultPanel").innerHTML = str;
    });

    var myValue;
    ac.addEventListener("onconfirm", function (e) {    //鼠标点击下拉列表后的事件
        var _value = e.item.value;
        myValue = _value.province + _value.city + _value.district + _value.street + _value.business;
        //G("searchResultPanel").innerHTML ="onconfirm<br />index = " + e.item.index + "<br />myValue = " + myValue;
        //将百度地图的地址赋值给 数据模型
        vue.searchMasterMsg.address = myValue;
        setPlace();
    });

    function setPlace() {
        map.clearOverlays();    //清除地图上所有覆盖物
        function myFun() {
            var pp = local.getResults().getPoi(0).point;    //获取第一个智能搜索的结果
            map.centerAndZoom(pp, 18);
            map.addOverlay(new BMap.Marker(pp));    //添加标注
        }

        var local = new BMap.LocalSearch(map, { //智能搜索
            onSearchComplete: myFun
        });
        local.search(myValue);
    }
</script>

输入框定义suggestId

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<div class="am-form-group">
    <label for="suggestId" class="am-form-label">地址</label>
    <div class="am-form-content">
        <input type="text" id="suggestId" v-model="searchMasterMsg.address" placeholder="请输入地址">
    </div>
</div>
<div class="info-btn">
    <div class="am-btn am-btn-danger" @click="publish">发布</div>
</div>
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publish() {
    //string - boolean不行  那就string - int - boolean就可以了 1==true，0==false
    if (this.searchMasterMsg.gender) {
        this.searchMasterMsg.gender = parseInt(this.searchMasterMsg.gender);
    }
    this.$http.post("/searchMasterMsg/publish", this.searchMasterMsg).then(result => {
        //发布成功后就跳转到主页
        result = result.data;
        if (result.success) {
            alert("发布成功！");
            location.href = "/index.html";
        } else {
            alert(result.msg);
        }
    }).catch(res => {
        alert("系统错误");
    })
}

  • addEventListener方法中添加一句代码，这样地址才能传递到后端

    vue.searchMasterMsg.address = myValue;

  • 要注释点G(“searchResultPanel”),这个是用来显示地图的，没有这个id属性

vue挂在实例

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const vue = new Vue({
    el: "#myDiv",
    data() {
        return {
            loginInfo: null,
            searchMasterMsg: {
                name: '小七',
                price: 10,
                age: 3,
                gender: 1,
                coatColor: '黑色',
                resources: null,
                petType: 1,
                address: null,
                title: '二哈寻主'
            }
        }
    },
    methods: {
        publish() {
            //string - boolean不行  那就string - int - boolean就可以了 1==true，0==false
            if (this.searchMasterMsg.gender) {
                this.searchMasterMsg.gender = parseInt(this.searchMasterMsg.gender);
            }
            this.$http.post("/searchMasterMsg/publish", this.searchMasterMsg).then(result => {
                //发布成功后就跳转到主页
                result = result.data;
                if (result.success) {
                    alert("发布成功！");
                    location.href = "/index.html";
                } else {
                    alert(result.msg);
                }
            }).catch(res => {
                alert("系统错误");
            })
        }
    },
    mounted() {
        let loginInfo = localStorage.getItem("loginInfo");
        if (loginInfo) {
            this.loginInfo = JSON.parse(loginInfo);
        }
    }

});

五. 工具类

1. 解析地址经纬度

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package io.coderyeah.basic.util;

import lombok.Data;

/**
 * 存放经纬度
 */
@Data
public class Point {
    //经度
    private Double lng;
    //维度
    private Double lat;
}

2. 位置工具类

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package io.coderyeah.basic.util;

import io.coderyeah.org.domain.Shop;

import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.List;

/**
 * 位置相关工具类
 */
public class DistanceUtils {

    //给一个地址 - 算出这个地址的经纬度
    public static Point getPoint(String address) {
        String Application_ID = "PQ9FAt6qg7taDWj6LLABYO7u6bSETXhD";//配置上自己的百度地图应用的AK
        try {
            String sCurrentLine;
            String sTotalString;
            sCurrentLine = "";
            sTotalString = "";
            InputStream l_urlStream;
            URL l_url = new URL("http://api.map.baidu.com/geocoding/v3/?address=" + address + "&output=json&ak=" + Application_ID + "&callback=showLocation");
            HttpURLConnection l_connection = (HttpURLConnection) l_url.openConnection();
            l_connection.connect();
            l_urlStream = l_connection.getInputStream();
            java.io.BufferedReader l_reader = new java.io.BufferedReader(new InputStreamReader(l_urlStream));
            String str = l_reader.readLine();
            System.out.println(str);

            //用经度分割返回的网页代码
            String s = "," + "\"" + "lat" + "\"" + ":";
            String strs[] = str.split(s, 2);
            String s1 = "\"" + "lng" + "\"" + ":";
            String a[] = strs[0].split(s1, 2);
            s1 = "}" + "," + "\"";
            String a1[] = strs[1].split(s1, 2);


            Point point = new Point();
            point.setLng(Double.valueOf(a[1]));
            point.setLat(Double.valueOf(a1[0]));
            return point;
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }
    }

    //地球半径,进行经纬度运算需要用到的数据之一
    private static final double EARTH_RADIUS = 6378137;

    //根据坐标点获取弧度
    private static double rad(double d) {
        return d * Math.PI / 180.0;
    }

    /**
     * 根据两点间经纬度坐标（double值），计算两点间距离，单位为米
     *
     * @param point1 A点坐标
     * @param point2 B点坐标
     * @return
     */
    public static double getDistance(Point point1, Point point2) {
        double radLat1 = rad(point1.getLat());
        double radLat2 = rad(point2.getLat());
        double a = radLat1 - radLat2;
        double b = rad(point1.getLng()) - rad(point2.getLng());
        double s = 2 * Math.asin(Math.sqrt(Math.pow(Math.sin(a / 2), 2) +
                Math.cos(radLat1) * Math.cos(radLat2) * Math.pow(Math.sin(b / 2), 2)));
        s = s * EARTH_RADIUS;
        s = Math.round(s * 10000) / 10000;
        return s;
    }

    /**
     * 根据两点间经纬度坐标（double值），计算两点间距离，单位为米
     *
     * @param point 用户指定的地址坐标
     * @param shops 商店
     * @return
     */
    public static Shop getNearestShop(Point point, List<Shop> shops) {

        //如果传过来的集合只有一家店铺,那么直接将这家店铺的信息返回就是最近的店铺了
        Shop shop = shops.get(0);
        //获取集合中第一家店铺到指定地点的距离
        double distance = getDistance(point, getPoint(shops.get(0).getAddress()));
        double minDistance = distance;
        //如果有多家店铺,那么就和第一家店铺到指定地点的距离做比较
        if (shops.size() > 1) {
            for (int i = 1; i < shops.size(); i++) {
                double distanceTmp = getDistance(point, getPoint(shops.get(i).getAddress()));
                if (distanceTmp < minDistance) {
                    shop = shops.get(i);
                    minDistance = distanceTmp;
                }
            }
        }
        if (minDistance > 50000) { //大于50公里，没有合适的店铺
            return null;
        }
        return shop;
    }

    public static void main(String[] args) {
        System.out.println(getPoint("成都市天府广场"));
    }
}

3. 业务代码（示例）

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package io.coderyeah.search.service.impl;
/**
 * @author coderyeah
 * @description 针对表【t_search_master_msg】的数据库操作Service实现
 * @createDate 2022-09-28 10:43:32
 */
@Service
@Slf4j
public class SearchMasterMsgServiceImpl extends ServiceImpl<SearchMasterMsgMapper, SearchMasterMsg> implements SearchMasterMsgService {
    @Autowired
    private EmployeeMapper employeeMapper;
    @Autowired
    private UserMapper userMapper;
    @Resource
    private SearchMasterMsgMapper searchMasterMsgMapper;
    @Autowired
    private BaiduAiAuditService baiduAiAuditService;
    @Resource
    private SearchMasterMsgAuditLogMapper logMapper;
    @Resource
    private ShopMapper shopMapper;

    @Transactional// 开启事务
    @Override
    public Result publish(SearchMasterMsg searchMasterMsg, HttpServletRequest req) {
        // 参数校验
        if (StrUtil.isBlank(searchMasterMsg.getAddress()) || StrUtil.isBlank(searchMasterMsg.getName())) {
            return Result.fail("参数错误");
        }
        // 获取当前寻主消息发布人
        LoginInfo loginInfo = LoginContext.getLoginInfo(req);
        // 找到当前loginInfo的user对象
        assert loginInfo != null;
        User user = userMapper.selectOne(new LambdaQueryWrapper<User>()
                .eq(User::getLogininfoId, loginInfo.getId()));
        // 保存寻主消息
        searchMasterMsg.setUserId(user.getId());
        searchMasterMsgMapper.insert(searchMasterMsg);
        // 百度ai智能审核
        // 审核文本内容
        final Boolean bool1 = baiduAiAuditService.textAudit(searchMasterMsg.getName() + searchMasterMsg.getTitle() + searchMasterMsg.getCoatColor());
        // 审核图片
        final Boolean bool2 = baiduAiAuditService.imageAudit(searchMasterMsg.getResources());
        // 提交审核日志
        final SearchMasterMsgAuditLog log = new SearchMasterMsgAuditLog();
        log.setMsgId(searchMasterMsg.getId());
        if (bool1 && bool2) {
            // 发布消息审核成功 0-1
            searchMasterMsg.setState(1);
            // 查询所有店铺
            final List<Shop> shops = shopMapper.selectList(new LambdaUpdateWrapper<>());
            // 获取发布人位置的经纬度
            final Point point = DistanceUtils.getPoint(searchMasterMsg.getAddress());
            // 获取距离最近的店铺
            final Shop nearestShop = DistanceUtils.getNearestShop(point, shops);
            if (nearestShop != null) {
                searchMasterMsg.setState(2);
                searchMasterMsg.setShopId(nearestShop.getId());
                // 更新发布信息
                searchMasterMsgMapper.updateById(searchMasterMsg);
                // 发送短信通知店铺管理员
                // 通过shopId查找店铺管理员
                final Employee employee = employeeMapper.selectOne(new LambdaUpdateWrapper<Employee>().eq(Employee::getShopId, nearestShop.getId()));
//                SmsUtils.sendSms(employee.getPhone(), "您有新的订单啦！请前往" + searchMasterMsg.getAddress() + "完成收购！");
                System.out.println("您有新的订单啦！请前往" + searchMasterMsg.getAddress() + "完成收购！");
            } else {
                // 放入寻主池
                searchMasterMsg.setState(3);
                // 更新发布信息
                searchMasterMsgMapper.updateById(searchMasterMsg);
            }
            log.setState(1); // 审核成功
            log.setNote("AI审核通过");
            // 保存审核日志
            logMapper.insert(log);
        } else {
            // 审核失败
            log.setState(0); // 审核成功
            log.setNote("AI审核未通过");
            logMapper.insert(log);
              // 删除寻主消息 避免多次添加
            searchMasterMsgMapper.deleteById(searchMasterMsg.getId());
//            SmsUtils.sendSms(user.getPhone(),"审核未通过,请重新编辑内容后上传！！！");
            return Result.fail("发布失败,请修改信息后再次提交");
        }
        return Result.success("发布成功");
    }
}