mybatis-plus 支持不同数据源sql切换

mybatis-plus 支持不同数据源sql切换

本篇内容主要讲解的是mybatis-plus 支持不同数据源sql切换

直接上代码

1、结构代码

2、引入依赖

  
            org.springframework.boot
            spring-boot-starter-web
        
        
            org.springframework.boot
            spring-boot-starter-test
            test
        
        
        
            com.baomidou
            mybatis-plus-boot-starter
            3.5.3
        
        
        
            mysql
            mysql-connector-java
            5.1.47
        
        
        
            org.opengauss
            opengauss-jdbc
            3.0.0
        

3、代码

MybatisPlusConfig

@Configuration
@MapperScan("com.liuhm.dao.mapper*")
public class MybatisPlusConfig {
	@Autowired
	MybatisPlusProperties mybatisPlusProperties;
	/**
	 * 分页插件
	 */
	@Bean
	public PaginationInterceptor paginationInterceptor() {
		PaginationInterceptor paginationInterceptor = new PaginationInterceptor();
		paginationInterceptor.setDialectType(mybatisPlusProperties.getGlobalConfig().getDbConfig().getDbType().getDb());
		return paginationInterceptor;
	}

	/**
	 * SQL执行效率插件
	 * 设置 dev test 环境开启
	 */
	@Bean
	/*@Profile({"dev","test"})*/
	public PerformanceInterceptor performanceInterceptor() {
		return new HyperformanceInterceptor();
	}

}

MenuMapper.java

/**
 * 菜单 mapper 接口
 *
 * @author liuhaomin
 * @date 2023.7.10
 */
@Repository
@CacheNamespace
public interface MenuMapper extends BaseMapper<Menu> {
    public List<Menu> select();
}

com.liuhm.dao.mysqlmapper.MenuMapper.xml

mysql查询10条

DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.liuhm.dao.mapper.MenuMapper">
    <cache-ref namespace="com.liuhm.dao.mapper.MenuMapper"/>
    <select id="select" resultType="com.liuhm.entity.Menu">
        select * from mcp_menu limit 10
    select>

mapper>

com.liuhm.dao.tidb.MenuMapper.xml

tidb查询1条

DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.liuhm.dao.mapper.MenuMapper">
    <cache-ref namespace="com.liuhm.dao.mapper.MenuMapper"/>
    <select id="select" resultType="com.liuhm.entity.Menu">
        select * from mcp_menu limit 1
    select>

mapper>

application.yml

spring:
  datasource:
    # mysql
#    driver-class-name: com.mysql.jdbc.Driver
#    username: root
#    password: Cobbler1234!
#    url: jdbc:mysql://192.168.0.229:43306/test?useUnicode=true&characterEncoding=UTF-8&zeroDateTimeBehavior=convertToNull&allowMultiQueries=true&useSSL=false
# gaussdb
#    driver-class-name: org.opengauss.Driver
#    username: ga_mason
#    password: OpenGauss@123
#    url: jdbc:opengauss://192.168.0.120:5432/my_db
# tidb
    driver-class-name: com.mysql.jdbc.Driver
    username: root
    password: 123456
    url: jdbc:mysql://192.168.56.10:4000/test?useUnicode=true&characterEncoding=UTF-8&zeroDateTimeBehavior=convertToNull&allowMultiQueries=true&useSSL=false
mybatis-plus:
  mapper-locations: classpath*:com/liuhm/dao/tidbmapper/*Mapper.xml
  # 实体扫描，多个package用逗号或者分号分隔
  type-aliases-package: com.liuhm.entity
  global-config:
    db-config:
      id-type: id_worker
      field-strategy: not_null
      logic-delete-value: 0
      logic-not-delete-value: 0
      db-type: mysql
    banner: false
  configuration:
    map-underscore-to-camel-case: true
    cache-enabled: false

server:
  port: 9099

★4、不同数据源进行切换步骤

改变对应的连接方式，修改连接，驱动

增加对应的特殊sql

修改db-type

修改对应的mapper-locations

5、测试

使用mysql时候

yml 配置 设置扫描xml地址

mybatis-plus:
  mapper-locations: classpath*:com/liuhm/dao/mysqlmapper/*Mapper.xml
  global-config:
    db-config:
      db-type: mysql

启动服务测试

MenuMapperTest.select

使用tidb时候

yml 配置 设置扫描xml地址

mybatis-plus:
  mapper-locations: classpath*:com/liuhm/dao/tidbmapper/*Mapper.xml
  global-config:
    db-config:
      db-type: mysql

启动服务测试

MenuMapperTest.select

6、不同版本对应分页插件情况

官方地址

3.1.0版本支持的分页插件

 	MYSQL("mysql", "%s LIKE CONCAT('%%',#{%s},'%%')", "MySql数据库"),
    MARIADB("mariadb", "%s LIKE CONCAT('%%',#{%s},'%%')", "MariaDB数据库"),
    ORACLE("oracle", "%s LIKE CONCAT(CONCAT('%%',#{%s}),'%%')", "Oracle数据库"),
    DB2("db2", "%s LIKE CONCAT(CONCAT('%%',#{%s}),'%%')", "DB2数据库"),
    H2("h2", "%s LIKE CONCAT('%%',#{%s},'%%')", "H2数据库"),
    HSQL("hsql", "%s LIKE CONCAT('%%',#{%s},'%%')", "HSQL数据库"),
    SQLITE("sqlite", "%s LIKE CONCAT('%%',#{%s},'%%')", "SQLite数据库"),
    POSTGRE_SQL("postgresql", "%s LIKE CONCAT('%%',#{%s},'%%')", "Postgre数据库"),
    SQL_SERVER2005("sqlserver2005", "%s LIKE '%%'+#{%s}+'%%'", "SQLServer2005数据库"),
    SQL_SERVER("sqlserver", "%s LIKE '%%'+#{%s}+'%%'", "SQLServer数据库"),
    DM("dm", (String)null, "达梦数据库"),
    OTHER("other", (String)null, "其他数据库");

3.5.3版本支持的分页插件

 	MYSQL("mysql", "MySql数据库"),
    MARIADB("mariadb", "MariaDB数据库"),
    ORACLE("oracle", "Oracle11g及以下数据库(高版本推荐使用ORACLE_NEW)"),
    ORACLE_12C("oracle12c", "Oracle12c+数据库"),
    DB2("db2", "DB2数据库"),
    H2("h2", "H2数据库"),
    HSQL("hsql", "HSQL数据库"),
    SQLITE("sqlite", "SQLite数据库"),
    POSTGRE_SQL("postgresql", "Postgre数据库"),
    SQL_SERVER2005("sqlserver2005", "SQLServer2005数据库"),
    SQL_SERVER("sqlserver", "SQLServer数据库"),
    DM("dm", "达梦数据库"),
    XU_GU("xugu", "虚谷数据库"),
    KINGBASE_ES("kingbasees", "人大金仓数据库"),
    PHOENIX("phoenix", "Phoenix HBase数据库"),
    GAUSS("zenith", "Gauss 数据库"),
    CLICK_HOUSE("clickhouse", "clickhouse 数据库"),
    GBASE("gbase", "南大通用(华库)数据库"),
    GBASE_8S("gbase-8s", "南大通用数据库 GBase 8s"),
    /** @deprecated */
    @Deprecated
    GBASEDBT("gbasedbt", "南大通用数据库"),
    /** @deprecated */
    @Deprecated
    GBASE_INFORMIX("gbase 8s", "南大通用数据库 GBase 8s"),
    OSCAR("oscar", "神通数据库"),
    SYBASE("sybase", "Sybase ASE 数据库"),
    OCEAN_BASE("oceanbase", "OceanBase 数据库"),
    FIREBIRD("Firebird", "Firebird 数据库"),
    HIGH_GO("highgo", "瀚高数据库"),
    CUBRID("cubrid", "CUBRID数据库"),
    GOLDILOCKS("goldilocks", "GOLDILOCKS数据库"),
    CSIIDB("csiidb", "CSIIDB数据库"),
    SAP_HANA("hana", "SAP_HANA数据库"),
    IMPALA("impala", "impala数据库"),
    VERTICA("vertica", "vertica数据库"),
    XCloud("xcloud", "行云数据库"),
    REDSHIFT("redshift", "亚马逊redshift数据库"),
    OPENGAUSS("openGauss", "华为 opengauss 数据库"),
    TDENGINE("TDengine", "TDengine数据库"),
    INFORMIX("informix", "Informix数据库"),
    UXDB("uxdb", "优炫数据库"),
    OTHER("other", "其他数据库");

博客地址

代码下载

下面的mybatis-plus-demo