springboot扩展添加集合《一》

最新推荐文章于 2025-03-10 23:00:44 发布

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最新推荐文章于 2025-03-10 23:00:44 发布

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分类专栏： java 文章标签： spring boot java mybatis

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该博客介绍了如何在Spring Boot应用中配置Druid数据源、Mybatis以及连接Mysql数据库。通过在pom.xml添加相关依赖，设置application.yml中的数据库信息，并创建配置文件MysqlMybatisConfigDb3.java来定义数据源、SqlSessionFactory、事务管理器和SqlSessionTemplate。此外，还展示了对应的Mapper接口和XML配置文件的示例。

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1.pom.xml中添加扩展(注意版本)

<!-- msyql-mybatis -->
<dependency>
    <groupId>com.alibaba</groupId>
    <artifactId>druid-spring-boot-starter</artifactId>
    <version>1.1.13</version>
</dependency>
<dependency>
    <groupId>mysql</groupId>
    <artifactId>mysql-connector-java</artifactId>
    <scope>runtime</scope>
</dependency>
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
    <groupId>org.mybatis.spring.boot</groupId>
    <artifactId>mybatis-spring-boot-starter</artifactId>
    <version>1.3.2</version>
</dependency>
<!-- msyql-mybatis -->

2.application.yml配置增加(url如果没有配置p6spy需要调整)

spring: //数据库信息
  datasource:
    db3:
      jdbc-url: jdbc:p6spy:mysql://192.168.xxx.xxx:3306/patozon_ums?useUnicode=true&characterEncoding=UTF-8&useSSL=false&allowPublicKeyRetrieval=true&autoReconnect=true&failOverReadOnly=false&serverTimezone=GMT%2B8&allowMultiQueries=true
      username: cc
      password: mysql123
      type: com.alibaba.druid.pool.DruidDataSource
      driver-class-name: com.p6spy.engine.spy.P6SpyDriver

mybatis://获取mybatis的mapper.xml
  typeAliasesPackage: com.ptx.scm.model
  mapperLocations: classpath:/mapper/*.xml,classpath:/mapper/*/*.xml

3.config配置文件增加
MysqlMybatisConfigDb3.java

package com.example.devguo.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;

/**
 * @Author: dev_guo
 * @Date: 2022/2/10 17:54
 */
@Configuration
@MapperScan(basePackages = "com.example.devguo.mapper.db3", sqlSessionFactoryRef = "db3SqlSessionFactory")
public class MysqlMybatisConfigDb3 {

    @Bean(name = "db3DataSource")
    @Primary
    @ConfigurationProperties(prefix = "spring.datasource.db3")
    public DataSource db3DataSource() {
        return DataSourceBuilder.create().build();
    }

    @Bean(name = "db3SqlSessionFactory")
    @Primary
    public SqlSessionFactory db3SqlSessionFactory(@Qualifier("db3DataSource") DataSource dataSource) throws Exception {
        SqlSessionFactoryBean bean = new SqlSessionFactoryBean();
        bean.setMapperLocations(new PathMatchingResourcePatternResolver().getResources("classpath:mapper/db3/*Mapper.xml"));
        bean.setDataSource(dataSource);
        return bean.getObject();
    }

    @Bean(name = "db3TransactionManager")
    @Primary
    public DataSourceTransactionManager db3TransactionManager(@Qualifier("db3DataSource") DataSource dataSource) {
        return new DataSourceTransactionManager(dataSource);
    }

    @Bean(name = "db3SqlSessionTemplate")
    @Primary
    public SqlSessionTemplate test1SqlSessionTemplate(@Qualifier("db3SqlSessionFactory") SqlSessionFactory sqlSessionFactory) {
        return new SqlSessionTemplate(sqlSessionFactory);
    }
}

4.需要创建的文件
resources/mapper/db3 示例文件：UmsMapper.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="com.example.devguo.mapper.db3.UmsMapper">
    <!-- 通用查询映射结果 -->
    <resultMap id="BaseResultMap" type="com.example.devguo.model.entity.MenuItems">
        <id column="id" property="id" />
        <result column="title" property="title" />
        <result column="erpDeptId" property="erpDeptId" />
    </resultMap>
    <select id="getMenuItems" resultMap="BaseResultMap">
        SELECT id,title,erp_dept_id as erpDeptId FROM menu_items WHERE parent_id=49 and `status`=1
    </select>
</mapper>

com.example.devguo.mapper.db3 示例文件UmsMapper.java

package com.example.devguo.mapper.db3;

import com.example.devguo.model.entity.MenuItems;
import org.apache.ibatis.annotations.Mapper;
import org.springframework.stereotype.Repository;

import java.util.List;

@Repository
@Mapper
public interface UmsMapper {

    List<MenuItems> getMenuItems();
}