mybatis+springboot发布postgresql数据的实现

<dependencies>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-test</artifactId>
        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter</artifactId>
    </dependency>
    <dependency>
        <groupId>org.mybatis.spring.boot</groupId>
        <artifactId>mybatis-spring-boot-starter</artifactId>
        <version>2.3.0</version>
    </dependency>
    <!-- postgresql依赖 -->
    <dependency>
        <groupId>org.postgresql</groupId>
        <artifactId>postgresql</artifactId>
        <version>42.1.1</version>
    </dependency>
</dependencies>

<resources>
    <resource>
        <directory>src/main/java</directory>
        <includes>
            <include>**/*.properties</include>
            <include>**/*.xml</include>
        </includes>
        <filtering>false</filtering>
    </resource>
    <resource>
        <directory>src/main/resources</directory>
        <includes>
            <include>**/*.yml</include>
            <include>**/*.xml</include>
        </includes>
        <filtering>false</filtering>
    </resource>
</resources>

server:
  #端口号
  port: 8088
  #项目名，如果不设定，默认是 /

spring:
  datasource:
    url: jdbc:postgresql://192.168.10.12:5432/wuxue_argculture
    username: postgres
    password: postgres
    driver-class-name: org.postgresql.Driver

logging:
  level:
    com.demo.mapper: debug

mybatis:
  #标注mybatis配置文件的位置
  config-location: classpath:mybatis-config.xml
  #标注待解析的mapper的xml文件位置
  mapper-locations: classpath:demo/dao/*.xml
  #标注实体类位置
  type-aliases-package: demo.entity

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-config.dtd">

<configuration>
    <settings>
        <!-- #开启mybatis驼峰式命名规则自动转换 -->
        <setting name="mapUnderscoreToCamelCase" value="true" />
    </settings>
    <!-- 类型别名配置 -->
    <typeAliases>
        <typeAlias type="demo.entity.StandardYard" alias="StandardYard"/>
        <!-- 添加其他类型别名 -->
    </typeAliases>
</configuration>

##指定mybatis输出日志的位置, 输出控制台
#mybatis:
#  configuration:
#    log-impl: org.apache.ibatis.logging.stdout.StdOutImpl

<?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="demo.dao.StandardYardMapper">
   <!-- 定义 ResultMap -->
   <resultMap id="standardYardResultMap" type="StandardYard">
       <id property="id" column="id" />
       <result property="townName" column="town_name" />
       <result property="community" column="community" />
       <result property="yardName" column="yard_name" />
       <!-- 其他字段映射 -->
       <result property="longitude" column="lon" />
       <result property="latitude" column="lat" />
   </resultMap>

   <select id="getStandardYardById" resultMap="standardYardResultMap">
       SELECT a.id AS standard_yard_id,a.*, b.lon, b.lat
       FROM standard_yard_2022 a
       LEFT JOIN village_random b ON a.community LIKE '%' || b.cjqymc || '%'
       WHERE a.id = #{id}
   </select>
   <select id="getStandardYards" resultMap="standardYardResultMap">
       SELECT a.*, b.lon, b.lat
       FROM standard_yard_2022 a
       LEFT JOIN village_random b ON a.community LIKE '%' || b.cjqymc || '%'
   </select>
</mapper>

SELECT *
FROM 表1
LEFT JOIN 表2
ON 表1.字段 = 表2.字段

@RestController
@RequestMapping("/wuXue/StandardYard")
public class StandardYardController {
    @Autowired
    private StandardYardService standardYardService;
    @GetMapping("/getList")
    public Result list() {
        //1. 调用service层, 获取数据
        List<StandardYard> StandardYardList = standardYardService.getStandardYards();
        //3. 响应数据
        return Result.success(StandardYardList);
    }
    @GetMapping("/getById")
    public Result getById(@RequestParam(value="id")int id) {
        //1. 调用service层, 获取数据
        StandardYard standardYard = standardYardService.getStandardYardById(id);
        //3. 响应数据
        return Result.success(standardYard);
    }
}