自定义typeHandler将包含经纬度对象插入到mysql的point类型的字段中博客：https://www.emanjusaka.top
公众号：emanjusaka的编程栈
下面给出关键部分代码，完整代码请访问原文地址
mysql 中的 point 类型在 java 中没有对应的类型匹配，需要我们自定义 typeHandler 去处理。
环境参数
- SpringBoot
- MybatisPlus
- mysql
代码实现
typeHandler
GeomPointTypeHandler.java
package top.emanjusaka.config.typeHandler;import org.apache.ibatis.type.BaseTypeHandler;
import org.apache.ibatis.type.JdbcType;
import top.emanjusaka.domain.GeomPoint;import java.sql.CallableStatement;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;public class GeomPointTypeHandler extends BaseTypeHandler<GeomPoint> {@Overridepublic void setNonNullParameter(PreparedStatement ps, int i, GeomPoint parameter, JdbcType jdbcType) throws SQLException {ps.setString(i, parameter.toString());}@Overridepublic GeomPoint getNullableResult(ResultSet rs, String columnName) throws SQLException {String columnValue = rs.getString(columnName);return new GeomPoint().parse(columnValue);}@Overridepublic GeomPoint getNullableResult(ResultSet rs, int columnIndex) throws SQLException {String columnValue = rs.getString(columnIndex);return new GeomPoint().parse(columnValue);}@Overridepublic GeomPoint getNullableResult(CallableStatement cs, int columnIndex) throws SQLException {String columnValue = cs.getString(columnIndex);return new GeomPoint().parse(columnValue);}
}
Mapper
UserMapper.java
package top.emanjusaka.mapper;import com.baomidou.mybatisplus.core.mapper.BaseMapper;
import top.emanjusaka.domain.User;/*** @Author emanjusaka* @Date 2024/11/28 17:46* @Version 1.0*/
public interface UserMapper extends BaseMapper<User> {void savePoint(User user);User getUserById(Long id);}UserMapper.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN""http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="top.emanjusaka.mapper.UserMapper"><resultMap id="pointResultMap" type="top.emanjusaka.domain.User"><id column="id" property="id"/><result column="location" property="location"typeHandler="top.emanjusaka.config.typeHandler.GeomPointTypeHandler"/></resultMap><insert id="savePoint" parameterType="top.emanjusaka.domain.User">insert into user(id,location)values(#{id},ST_GeomFromText(#{location,typeHandler=top.emanjusaka.config.typeHandler.GeomPointTypeHandler}))</insert><select id="getUserById" parameterType="long" resultType="top.emanjusaka.domain.User">select id,ST_ASTEXT(location) location from user where id = #{id}</select>
</mapper>测试类
UserTest.java
package top.emanjusaka.point;import org.junit.jupiter.api.Test;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.boot.test.context.SpringBootTest;
import top.emanjusaka.domain.GeomPoint;
import top.emanjusaka.domain.User;
import top.emanjusaka.mapper.UserMapper;import javax.annotation.Resource;/*** @Author emanjusaka* @Date 2024/11/28 17:41* @Version 1.0*/
@SpringBootTest
public class UserTest {private static final Logger log = LoggerFactory.getLogger(UserTest.class);@Resourceprivate UserMapper userMapper;@Testvoid testPoint() {User user = new User();user.setLocation(new GeomPoint(3.14, 5.15));userMapper.savePoint(user);}@Testvoid testSelectPoint() {User user = userMapper.getUserById(1L);System.out.println("point = " + user.getLocation().getLat());}
}测试结果
插入数据：
查询数据：
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上面代码展示了关键部分，完整代码请访问原文地址
