【配置】SpringBoot2.3.0整合MyBaits-(XML)

依赖

• spring-boot-starter-jdbc
• mybatis-spring-boot-starter
• mysql-connector-java
• druid-spring-boot-starter

<dependency>
    <groupId>org.springframework.bootgroupId>
    <artifactId>spring-boot-starter-jdbcartifactId>
dependency>
<dependency>
    <groupId>org.mybatis.spring.bootgroupId>
    <artifactId>mybatis-spring-boot-starterartifactId>
    <version>2.1.2version>
dependency>
<dependency>
    <groupId>mysqlgroupId>
    <artifactId>mysql-connector-javaartifactId>
    <scope>runtimescope>
dependency>
<dependency>
    <groupId>com.alibabagroupId>
    <artifactId>druid-spring-boot-starterartifactId>
    <version>1.1.22version>
dependency>

目录结构

• mapper.xml

  
  
  <mapper namespace="com.live.mapper.UserMapper">
      <select id="queryUsers" resultType="com.live.model.User">
          select * from jdbc_test
      select>
  mapper>
  

• mybatis.xml

  
  
  <configuration>
      <settings>  
          <setting name="lazyLoadingEnabled" value="true"/>
          <setting name="aggressiveLazyLoading" value="false"/>
          <setting name="mapUnderscoreToCamelCase" value="true"/>
      settings>
  configuration>
  

  • 更多MyBatis配置官网

application.yml

• config-location：指定mybatis配置文件路径

• mapper-locations：指定mapper sql映射文件路径

• 默认数据源（Jdbc）

  spring:
    datasource:
      url: jdbc:mysql://localhost:3306/spring_boot?serverTimezone=GMT%2B8
      username: root
      password: root
      driver-class-name: com.mysql.cj.jdbc.Driver
  mybatis:
    config-location: classpath:mybatis/mybatis.xml
    mapper-locations: classpath:mybatis/mapper/*.xml
  

• druid数据源

  spring:
    datasource:
      username: root
      password: root
      url: jdbc:mysql://localhost:3306/spring_boot?serverTimezone=GMT%2B8
      type: com.alibaba.druid.pool.DruidDataSource
      driver-class-name: com.mysql.cj.jdbc.Driver
      druid:
        stat-view-servlet:
          enabled: true
          url-pattern: /druid/*
          login-username: admin
          login-password: 12345
        initial-size: 5
        min-idle: 5
        max-active: 20
        max-wait: 60000
        time-between-eviction-runs-millis: 60000
        min-evictable-idle-time-millis: 300000
        validation-query: SELECT 1 FROM DUAL
        test-while-idle: true
        test-on-borrow: false
        test-on-return: false
        pool-prepared-statements: true
        max-pool-prepared-statement-per-connection-size: 20
        filters: [stat,wall,log4j]
        filter:
          stat:
            merge-sql: true
            slow-sql-millis: 5000
  mybatis:
    config-location: classpath:mybatis/mybatis.xml
    mapper-locations: classpath:mybatis/mapper/*.xml
  

Java

• POJO

  package com.live.model;
  
  import lombok.Data;
  
  @Data
  public class User {
  
      private int id;
      private String username;
      private String password;
  
  }
  
  

• UserMapper

  package com.live.mapper;
  
  import com.live.model.User;
  import org.apache.ibatis.annotations.Mapper;
  
  import java.util.List;
  
  @Mapper
  public interface UserMapper {
  
      List<User> queryUsers();
  
  }
  
  

• Controller

  package com.live.controler;
  
  import com.live.mapper.UserMapper;
  import com.live.model.User;
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.web.bind.annotation.GetMapping;
  import org.springframework.web.bind.annotation.RestController;
  
  import java.util.List;
  
  @RestController
  public class MyBatisController {
  
      @Autowired
      private UserMapper userMapper;
  
      @GetMapping("/MyBatis")
      public List<User> test() {
          return userMapper.queryUsers();
      }
  
  }
  
  

  ---

完！