springboot微服务架构整合postgreSQL数据库——存储geometry类型数据
说明：本文整理拓展自https://github.com/eyougo/mybatis-typehandlers-postgis/blob/master/READM
1、要求
java1.7或更高版本。
2、pom.xml文件
pom.xml文件（这里是第3个依赖，其它依赖请忽略）
org.postgresql
postgresql
42.2.5
org.postgis
postgis-jdbc
1.3.3
com.eyougo
mybatis-typehandlers-postgis
1.0
3、configuration配置（根据自己的项目选择其一）
(1)If you are using MyBatis alone, add the type handlers to your mybatis-config.xml as follow:
(2)If you are using MyBatis with Spring, add the type handlers package to the Spring configuration as follow:
With XML Configuration
Or with Java configuration
@Bean
public SqlSessionFactory sqlSessionFactory(Configuration config) {
SqlSessionFactoryBean factory = new SqlSessionFactoryBean();
// ...
factory.setTypeHandlersPackage("com.eyougo.mybatis.postgis.type");
return factory.getObject();
}(3)If you are using MyBatis with Spring Boot, add the type handlers package to the configuration file as follow:
application.properties
mybatis.type-handlers-package = com.eyougo.mybatis.postgis.typeOr application.yml（本文项目使用这种配置方式）
mybatis: type-handlers-package: com.eyougo.mybatis.postgis.type支持类型：
| Type handler | PostGIS Geometry API type | Available version |
| Available version | Available version | 1.0 |
| Available version | Available version | 1.0 |
| Available version | Available version | 1.0 |
| Available version | Available version | 1.0 |
4、springboot中自定义类型（PostGIS）
父类：
import org.apache.ibatis.type.BaseTypeHandler;
import org.apache.ibatis.type.JdbcType;
import org.postgis.Geometry;
import org.postgis.PGgeometry;
import java.sql.CallableStatement;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
/**
* Created by mei on 31/08/2017.
*/
public abstract class AbstractGeometryTypeHandler extends BaseTypeHandler {
public void setNonNullParameter(PreparedStatement ps, int i, T parameter, JdbcType jdbcType) throws SQLException {
PGgeometry geometry = new PGgeometry();
geometry.setGeometry(parameter);
ps.setObject(i, geometry);
}
public T getNullableResult(ResultSet rs, String columnName) throws SQLException {
PGgeometry pGgeometry = (PGgeometry) rs.getObject(columnName);
if (pGgeometry == null) {
return null;
}
return (T) pGgeometry.getGeometry();
}
public T getNullableResult(ResultSet rs, int columnIndex) throws SQLException {
PGgeometry pGgeometry = (PGgeometry) rs.getObject(columnIndex);
if (pGgeometry == null) {
return null;
}
return (T) pGgeometry.getGeometry();
}
public T getNullableResult(CallableStatement cs, int columnIndex) throws SQLException {
PGgeometry pGgeometry = (PGgeometry) cs.getObject(columnIndex);
if (pGgeometry == null) {
return null;
}
return (T) pGgeometry.getGeometry();
}
} 多边形子类：
import com.eyougo.mybatis.postgis.type.AbstractGeometryTypeHandler;
import org.apache.ibatis.type.MappedTypes;
import org.postgis.Polygon;
/**
* Created by mei on 31/08/2017.
*/
@MappedTypes(Polygon.class)
public class PolygonTypeHandler extends AbstractGeometryTypeHandler {
} 点子类：
import com.eyougo.mybatis.postgis.type.AbstractGeometryTypeHandler;
import org.apache.ibatis.type.MappedTypes;
import org.postgis.Point;
/**
* Created by mei on 31/08/2017.
*/
@MappedTypes(Point.class)
public class PointTypeHandler extends AbstractGeometryTypeHandler {
} 多点子类：
import com.eyougo.mybatis.postgis.type.AbstractGeometryTypeHandler;
import org.apache.ibatis.type.MappedTypes;
import org.postgis.MultiPoint;
/**
* Created by mei on 04/09/2017.
*/
@MappedTypes(MultiPoint.class)
public class MultiPointTypeHandler extends AbstractGeometryTypeHandler {
} 线子类：
import com.eyougo.mybatis.postgis.type.AbstractGeometryTypeHandler;
import org.apache.ibatis.type.MappedTypes;
import org.postgis.LineString;
/**
* Created by mei on 04/09/2017.
*/
@MappedTypes(LineString.class)
public class LineStringTypeHandler extends AbstractGeometryTypeHandler {
} 或者共用一个Geometry类型（上面的类型具体一点，这个包含以上几种类型）
import org.apache.ibatis.type.BaseTypeHandler;
import org.apache.ibatis.type.JdbcType;
import org.postgis.Geometry;
import org.postgis.PGgeometry;
import java.sql.CallableStatement;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
/**
* Created by mei on 31/08/2017.
*/
public class GeometryTypeHandler extends BaseTypeHandler {
public void setNonNullParameter(PreparedStatement ps, int i, T parameter, JdbcType jdbcType) throws SQLException {
PGgeometry geometry = new PGgeometry();
geometry.setGeometry(parameter);
ps.setObject(i, geometry);
}
public T getNullableResult(ResultSet rs, String columnName) throws SQLException {
PGgeometry pGgeometry = (PGgeometry) rs.getObject(columnName);
if (pGgeometry == null) {
return null;
}
return (T) pGgeometry.getGeometry();
}
public T getNullableResult(ResultSet rs, int columnIndex) throws SQLException {
PGgeometry pGgeometry = (PGgeometry) rs.getObject(columnIndex);
if (pGgeometry == null) {
return null;
}
return (T) pGgeometry.getGeometry();
}
public T getNullableResult(CallableStatement cs, int columnIndex) throws SQLException {
PGgeometry pGgeometry = (PGgeometry) cs.getObject(columnIndex);
if (pGgeometry == null) {
return null;
}
return (T) pGgeometry.getGeometry();
}
} 使用的时候，在数据库表xml文件中geometry字段添加相应的自定义类型即可，比如：
程序中的转化工具类（把String类型的坐标转化成相应的类型：Point、Polygon、LineString）：
import org.postgis.LineString;
import org.postgis.LinearRing;
import org.postgis.Point;
import org.postgis.Polygon;
/**
* 坐标点格式化工具类
*/
public class CorrdinateUtils {
/**
* 格式化Polygon类型:
* 将Vertexts字符串转换成Polygon类型
* @param vertexes 多边形围栏形状点(顺时针或逆时针): "double,double; double,double; ...;double,double"
* @return Polygon
*/
public static Polygon formatPolygon(String vertexes) throws Exception{
vertexes = CorrdinateUtils.stringUtils(vertexes);
String[] points = vertexes.split(";");
int length = points.length;
Point[] pointArray = new Point[length + 1];
for (int i = 0;i
5、例子
在xml文件中写特殊的sql时，就不需要使用相应的转化函数了，例如：
查询包含点POINT(1 1)的多边形
原先类似这种：（st_within(point,polygon)为postGIS中的特殊用途函数，这里请暂时忽略）
String point = "POINT(1 1)";
//字符串参数，必须使用函数ST_PointFromText('POINT(1 1)')来转成geometry类型
//st_asText() :把geometry转成类似文本类型（字符串）
select fence_id,fence_name,st_asText(fence_corrdinate),shape from fence where st_within(ST_PointFromText(#{point}),fence_corrdinate);
现在就直接写这种，跟普通SQL一样。（若是继承了BaseServiceImpl
select * from fence where st_within(#{point} ,fence_corrdinate);