自定义多数据源配置mybatis配置文件【分页插件没生效问题解决】

mybatis配置文件

import com.baomidou.mybatisplus.core.MybatisConfiguration;
import com.baomidou.mybatisplus.extension.plugins.PaginationInterceptor;
import com.baomidou.mybatisplus.extension.plugins.pagination.optimize.JsqlParserCountOptimize;
import com.baomidou.mybatisplus.extension.spring.MybatisSqlSessionFactoryBean;
import org.apache.ibatis.session.SqlSessionFactory;
import org.mybatis.spring.SqlSessionTemplate;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.beans.factory.annotation.Value;
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.ai.system.**.mapper",sqlSessionFactoryRef = "mysqlSqlSessionFactory")
public class MYSQLDataSourceConfig {

    @Value("${mybatis-plus.mapper-locations}")
    private String mapperLocation;

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

    @Bean(name = "mysqlSqlSessionFactory")
    @Primary
    public SqlSessionFactory ds1SqlsessionFactory(@Qualifier("mysqlDataSource") DataSource dataSource) throws Exception {
        MybatisSqlSessionFactoryBean bean = new MybatisSqlSessionFactoryBean();
        bean.setDataSource(dataSource);
        bean.setMapperLocations(new PathMatchingResourcePatternResolver().
                getResources(mapperLocation));
        //由于自定义配置数据源，故需引入分页插件拦截器
        MybatisConfiguration configuration = new MybatisConfiguration();
        configuration.addInterceptor(new PaginationInterceptor());
        bean.setConfiguration(configuration);
//配置填充字段
        bean.setGlobalConfig(new GlobalConfig().setBanner(false).setMetaObjectHandler(new MybatisHandler()));
        return bean.getObject();
    }

    @Bean(name = "mysqlTransactionManager")
    @Primary
    public DataSourceTransactionManager db1TransactionManager(@Qualifier("mysqlDataSource") DataSource dataSource) {
        return new DataSourceTransactionManager(dataSource);
    }

    @Bean
    @Primary
    public SqlSessionTemplate db1SqlSessionTemplate(@Qualifier("mysqlSqlSessionFactory") SqlSessionFactory sqlSessionFactory) throws Exception {
        return new SqlSessionTemplate(sqlSessionFactory);
    }
}

手动实现数据源mybatisplus需要手动引入一些配置。如分页插件、填充字段

填充字段文件 MybatisHandler

import com.baomidou.mybatisplus.core.handlers.MetaObjectHandler;
import org.apache.ibatis.reflection.MetaObject;
import org.springframework.stereotype.Component;

import java.util.Date;

@Component
public class MybatisHandler implements MetaObjectHandler {
    @Override
    public void insertFill(MetaObject metaObject) {
        this.setFieldValByName("createTime", new Date(), metaObject);
    }

    @Override 
    public void updateFill(MetaObject metaObject) {
        //属性名
        this.setFieldValByName("updateTime", new Date(), metaObject);
    }
}

实体类还需要加上注解

 

后记

mybatisplus分页插件的total一直显示0，分页插件没生效，由于自定义了mybatis配置文件，故代码块引入了分页插件，否则无效