地标Landmark配置(自维护数据)

深藏阁楼爱情的钟 2022-10-28 10:11 18阅读 0赞

项目的业务需求中需要根据数据的经纬度获取出数据所属的地标。此时需要一份经纬度点与所属地标的对应关系。此对应关系很难获取。有部分企业提供了这个对应关系，但是需要通过次数进行收费。对于企业来将此成本较大，且效益不高，不可取。  
本项目采取了自维护数据的方式编写了landMark.xml，此xml内部是经纬度范围与地标的对应关。  
**landmark配置**  
系统中关于landmark配置的说明，配置文件名称为landMark.xml  
配置文件格式为

<?xml version="1.0" encoding="UTF-8"?>
    
    <allresource> 
        <resourceitem> 
    	<lowerLeftLon>116.36827</lowerLeftLon>  
        <lowerLeftLat>39.964199</lowerLeftLat>
        <topRightLon>116.37657</topRightLon>
        <topRightLat>39.971249</topRightLat>
        <category>university</category>
        <landMarkName>北京师范大学</landMarkName>
      </resourceitem>
       <resourceitem> 
        <lowerLeftLon>116.322924</lowerLeftLon>  
        <lowerLeftLat>40.004059</lowerLeftLat>
        <topRightLon>116.341752</topRightLon>
        <topRightLat>40.014891</topRightLat>
        <category>university</category>
        <landMarkName>清华大学</landMarkName>
      </resourceitem>
      <resourceitem> 
        <lowerLeftLon>116.440283</lowerLeftLon>  
        <lowerLeftLat>39.895452</lowerLeftLat>
        <topRightLon>116.441396</topRightLon>
        <topRightLat>39.895846</topRightLat>
        <category>hotel</category>
        <landMarkName>7天连锁酒店</landMarkName>
      </resourceitem>  
      <resourceitem> 
        <lowerLeftLon>116.445097</lowerLeftLon>  
        <lowerLeftLat>39.903917</lowerLeftLat>
        <topRightLon>116.445259</topRightLon>
        <topRightLat>39.904069</topRightLat>
        <category>hotel</category>
        <landMarkName>锦江之星酒店</landMarkName>
      </resourceitem>  
    </allresource>

需要添加新地表时，在现有文件中按以上格式添加即可，新数据获取后，配置文件会自动生效。  
用java维护  
导入依赖

package cn.itcast.telecom.entity;
    
    public class LandMark { 
        //此处需要与landMark.xml配置文件内的内容完全相同
    
        private double lowerLeftLon;//左下角经度
        private double lowerLeftLat;//左下角纬度
        private double topRightLon;//右上角经度
        private double topRightLat;//右上角纬度
        private String category;//一级地标（所属分类）
        private String landMarkName;//二级地标 （地标名称）
    
        public LandMark() { 
        }
    
        public double getLowerLeftLon() { 
            return this.lowerLeftLon;
        }
    
        public void setLowerLeftLon(double lowerLeftLon) { 
            this.lowerLeftLon = lowerLeftLon;
        }
    
        public double getLowerLeftLat() { 
            return this.lowerLeftLat;
        }
    
        public void setLowerLeftLat(double lowerLeftLat) { 
            this.lowerLeftLat = lowerLeftLat;
        }
    
        public double getTopRightLon() { 
            return this.topRightLon;
        }
    
        public void setTopRightLon(double topRightLon) { 
            this.topRightLon = topRightLon;
        }
    
        public double getTopRightLat() { 
            return this.topRightLat;
        }
    
        public void setTopRightLat(double topRightLat) { 
            this.topRightLat = topRightLat;
        }
    
        public String getCategory() { 
            return this.category;
        }
    
        public void setCategory(String category) { 
            this.category = category;
        }
    
        public String getLandMarkName() { 
            return this.landMarkName;
        }
    
        public void setLandMarkName(String landMarkName) { 
            this.landMarkName = landMarkName;
        }
    }

package cn.itcast.telecom.landmark;
    
    import cn.itcast.telecom.entity.LandMark;
    import org.dom4j.Document;
    import org.dom4j.DocumentException;
    import org.dom4j.Element;
    import org.dom4j.io.SAXReader;
    import java.io.File;
    import java.util.ArrayList;
    import java.util.Iterator;
    import java.util.List;
    
    public class LandMarkUtil { 
        public LandMarkUtil() { 
        }
    
        public static List<LandMark> parseLandMark() throws DocumentException { 
            SAXReader reader = new SAXReader();
            Document document = null;
            document = reader.read(new File("src/landMark.xml"));//此处需将landMark.xml配置文件上传至jar所在节点的/ export目录下
            Element root = document.getRootElement();
            List list = root.elements("resourceitem");
            List<LandMark> landMarkBeans = new ArrayList();
            Iterator i = list.iterator();
    
            while(i.hasNext()) { 
                Element landMark = (Element)i.next();
                LandMark bean = new LandMark();
                bean.setLowerLeftLon(Double.valueOf(landMark.element("lowerLeftLon").getText()));
                bean.setLowerLeftLat(Double.valueOf(landMark.element("lowerLeftLat").getText()));
                bean.setTopRightLon(Double.valueOf(landMark.element("topRightLon").getText()));
                bean.setTopRightLat(Double.valueOf(landMark.element("topRightLat").getText()));
                bean.setCategory(landMark.element("category").getText());
                bean.setLandMarkName(landMark.element("landMarkName").getText());
                landMarkBeans.add(bean);
            }
    
            return landMarkBeans;
        }
    
        public static void main(String[] args) { 
            LandMarkUtil var1 = new LandMarkUtil();
    
            try { 
                parseLandMark();
            } catch (DocumentException var3) { 
                var3.printStackTrace();
            }
    
        }
    }

进行需求编辑------经纬度信息转化为landmark

import cn.itcast.telecom.entity.LandMark;
    import cn.itcast.telecom.landmark.LandMarkUtil;
    import org.dom4j.DocumentException;
    
    import java.util.List;
    
    public class TelecomUtil { 
    
        //经纬度信息转化为landmark
        //读取LandMark.xml地标配置文件，读取出文件中左下角经纬度、右上角经纬度（范围可以组成一个矩形）。
        // 遍历所有的地标配置判断用户上报的经纬度数据属于哪一个地标范围。最终返回所属地标。
        public static String getLandmark(Double lon,Double lat) throws DocumentException { 
            String lanMark = "unknow";
            //遍历所得矩形，与用户的数据匹配
            List<LandMark> landMarks = LandMarkUtil.parseLandMark();
            for (LandMark landmark : landMarks) { 
                //获取一个矩形得左下角经纬度和右上角维度，获取一二级坐标
                //若用户数据经纬度在地表范围，并且维度也在地标范围，表示这个点属于此地标
                if (landmark.getLowerLeftLon()<=lon && landmark.getTopRightLon()>=lon &&
                landmark.getLowerLeftLat()<=lat && landmark.getTopRightLat()>=lat){ 
                    //返回一级坐标
                    lanMark=landmark.getCategory();
                }
            }
            return lanMark;
        }
    
        public static void main(String[] args) throws DocumentException { 
            System.out.println(getLandmark(116.322925,40.014890));
        }
    
    }