springboot 引入 mybatis、mysql 【新手上路】

一、首先需要导入依赖

        
            org.springframework.boot
            spring-boot-starter-jdbc
        
        
            mysql
            mysql-connector-java
            runtime
        
        
            org.mybatis.spring.boot
            mybatis-spring-boot-starter
            2.1.1
        

二、配置config

package com.usmart.config;
import org.apache.ibatis.session.SqlSessionFactory;
import org.mybatis.spring.SqlSessionFactoryBean;
import org.mybatis.spring.SqlSessionTemplate;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.boot.jdbc.DataSourceBuilder;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Primary;
import org.springframework.core.io.support.PathMatchingResourcePatternResolver;
import org.springframework.jdbc.datasource.DataSourceTransactionManager;

import javax.sql.DataSource;

@Configuration
@MapperScan(basePackages = {"com.usmart.mapper"} //对应的mapper地址, sqlSessionTemplateRef  = "mysqlSqlSessionTemplate")
public class MysqlServerConfig {
    @Bean(name = "mysqlDataSource")
    @ConfigurationProperties(prefix = "spring.datasource.mysql-server" //获取配置文件目录)
    @Primary
    public DataSource mysqlDataSource() {
        return DataSourceBuilder.create().build();
    }

    @Bean(name = "mysqlSqlSessionFactory")
    @Primary
    public SqlSessionFactory mysqlSqlSessionFactory(@Qualifier("mysqlDataSource") DataSource dataSource) throws Exception {
        SqlSessionFactoryBean bean = new SqlSessionFactoryBean();
        bean.setDataSource(dataSource);
        bean.setMapperLocations(new PathMatchingResourcePatternResolver().getResources("classpath:mapper/*.xml") //xml存放的地方);
        return bean.getObject();
    }

    @Bean(name = "mysqlTransactionManager")
    @Primary
    public DataSourceTransactionManager mysqlTransactionManager(@Qualifier("mysqlDataSource") DataSource dataSource) {
        return new DataSourceTransactionManager(dataSource);
    }

    @Bean(name = "mysqlSqlSessionTemplate")
    @Primary
    public SqlSessionTemplate mysqlSqlSessionTemplate(@Qualifier("mysqlSqlSessionFactory") SqlSessionFactory sqlSessionFactory) throws Exception {
        return new SqlSessionTemplate(sqlSessionFactory);
    }
}

三、配置yml

# 数据源配置
spring:
  datasource:
    mysql-server:
      driver-class-name: com.mysql.cj.jdbc.Driver
      jdbc-url: jdbc:mysql://127.0.0.1:3306/test?useUnicode=true&serverTimezone=Asia/Shanghai&allowMultiQueries=true&allowMultiQueries=true
      username: root
      password: 123456
      type: com.zaxxer.hikari.HikariDataSource
      minimum-idle: 5                 #最小连接
      maximum-pool-size: 15        #最大连接
      auto-commit: true        #自动提交
      idle-timeout: 30000        #最大空闲时常
      pool-name: MysqlDruidCP        #连接池名
      max-lifetime: 1800000        #最大生命周期
      connection-timeout: 30000        #连接超时时间

四、方便查看打印的mysql配置logging

在yml里面配置

  # 日志配置
logging:
  level:
    com.usmart: debug
    org.springframework: warn