sharding-jdbc多数据源配置

通过sharding-jdbc做分表这里就不多做介绍了，需要的可以看上一片文章

当项目中配置了多数据源，并且其中一个数据源需要使用sharding-jdbc分表时，配置如下

1. 导入shardingjdbc依赖

          org.apache.shardingsphere        sharding-jdbc-spring-boot-starter        4.0.1 

这里使用的是4.0.1的配置，和上篇的3.1.0差别不大，详细配置大伙可以上官网查阅。

2. 多数据源配置类

shardingsphere数据源初始化

package com.efuav.parkingapron.config;import com.baomidou.mybatisplus.extension.spring.MybatisSqlSessionFactoryBean;import com.zaxxer.hikari.HikariDataSource;import org.apache.ibatis.session.SqlSessionFactory;import org.apache.shardingsphere.api.config.sharding.KeyGeneratorConfiguration;import org.apache.shardingsphere.api.config.sharding.ShardingRuleConfiguration;import org.apache.shardingsphere.api.config.sharding.TableRuleConfiguration;import org.apache.shardingsphere.api.config.sharding.strategy.StandardShardingStrategyConfiguration;import org.apache.shardingsphere.shardingjdbc.api.ShardingDataSourceFactory;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 javax.sql.DataSource;import java.sql.SQLException;import java.util.HashMap;import java.util.Map;import java.util.Properties;@Configuration@MapperScan(basePackages = "com.efuav.parkingapron.dao.db1", sqlSessionFactoryRef = "db1SqlSessionFactory")public class DataSourceConfig1 {    @Value("${spring.shardingsphere.datasource.efuavsystem.username}")    private String userName;    @Value("${spring.shardingsphere.datasource.efuavsystem.jdbc-url}")    private String url;    @Value("${spring.shardingsphere.datasource.efuavsystem.password}")    private String userPwd;    @Value("${spring.shardingsphere.datasource.names}")    private String dataName;//    @Primary // 表示这个数据源是默认数据源, 这个注解必须要加，因为不加的话spring将分不清楚那个为主数据源（默认数据源）//    @Bean(name="db1DataSource")    @ConfigurationProperties(prefix = "spring.datasource.db1") //读取application.yml中的配置参数映射成为一个对象//    public DataSource getDb1DataSource(){////        return DataSourceBuilder.create().build();//    }    @Bean(name = "db1DataSource")    @Qualifier("db1DataSource")    public DataSource deviceDataSource() throws SQLException {        return getShardingDataSource();    }    @Primary    @Bean("db1SqlSessionFactory")    public SqlSessionFactory db1SqlSessionFactory(@Qualifier("db1DataSource") DataSource dataSource) throws Exception {        MybatisSqlSessionFactoryBean bean = new MybatisSqlSessionFactoryBean();        bean.setDataSource(dataSource);        // mapper的xml形式文件位置必须要配置，不然将报错：no statement （这种错误也可能是mapper的xml中，namespace与项目的路径不一致导致）        bean.setMapperLocations(new PathMatchingResourcePatternResolver().getResources("classpath*:mapper/db1    @Override    public String doSharding(Collection collection, PreciseShardingValue preciseShardingValue) {        //  UAV07JDE6E0020240        String value = preciseShardingValue.getValue();        int las = value.charAt(value.length() - 1);        String tableName = "ef_uav_realtimedata" + ((las % 4)+1);        log.info("", tableName);        return tableName;    }}

4.yml配置文件

spring:  main:    allow-bean-definition-overriding: true  datasource:    infrared:      jdbc-url: jdbc:mysql://192.168.0.5:13306/infrared?characterEncoding=utf-8&useSSL=false&serverTimezone=Asia/Shanghai&rewriteBatchedStatements=true&allowPublicKeyRetrieval=true      username: root  #用户名      password: 123456 #密码      driver-class-name: com.mysql.cj.jdbc.Driver  #数据库链接驱动      type: com.zaxxer.hikari.HikariDataSource    hikari.minimum-idle: 5    hikari.maximum-pool-size: 15    hikari.auto-commit: true    hikari.idle-timeout: 30000    hikari.pool-name: DatebookHikariCP    # 不小于30s 否则会回到默认的1800秒, 用来设置一个connection在连接池中的存活时间，默认是1800000，即30分钟。如果设置为0，表示存活时间无限大。如果不等于0且小于30秒则会被重置回30分钟。    hikari.max-lifetime: 28800000    hikari.connection-timeout: 30000    hikari.connection-test-query: SELECT 1  shardingsphere:    datasource:      names: efuavsystem      efuavsystem:        jdbc-url: jdbc:mysql://127.0.0.1:3306/ef_uav_system?characterEncoding=utf-8&useSSL=false&serverTimezone=Asia/Shanghai&rewriteBatchedStatements=true&allowPublicKeyRetrieval=true        username: root  #用户名        password: 123456 #密码        driver-class-name: com.mysql.cj.jdbc.Driver  #数据库链接驱动        type: com.zaxxer.hikari.HikariDataSource        # 水平拆分的数据库（表） 配置分库 + 分表策略 行表达式分片策略#    sharding:#      tables:#        ef_uav_realtimedata:#          actual-data-nodes: efuavsystem.ef_uav_realtimedata$->{1..5}#          table-strategy:#            standard:#              precise-algorithm-class-name: com.efuav.parkingapron.config.UavPreciseShardingAlgorithm#              sharding-column: uav_id    # 打印执行的数据库#    props:#      sql:#        show: true

这样就不会冲突，以上就是sharding-jdbc多数据源配置了。

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来源地址：https://blog.csdn.net/m0_61367109/article/details/129398941