1. pom 文件依赖
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.2.2.RELEASE</version>
<relativePath /> <!-- lookup parent from repository -->
</parent>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<optional>true</optional>
</dependency>
<dependency>
<groupId>com.baomidou</groupId>
<artifactId>mybatis-plus-boot-starter</artifactId>
<version>3.0-beta</version>
</dependency>
<dependency>
<groupId>io.shardingjdbc</groupId>
<artifactId>sharding-jdbc-core</artifactId>
<version>2.0.3</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
2. application配置
server:
port: 9002
mybatis-plus:
# mapper-locations: classpath*:/mapper/*.xml
global-config:
db-config:
column-underline: true
#shardingjdbc配置
sharding:
jdbc:
data-sources:
###配置第一个从数据库
ds_slave_0:
password: root
jdbc-url: jdbc:mysql://192.168.212.203:3306/test?useUnicode=true&characterEncoding=utf-8&useSSL=true
driver-class-name: com.mysql.jdbc.Driver
username: root
###主数据库配置
ds_master:
password: root
jdbc-url: jdbc:mysql://192.168.212.202:3306/test?useUnicode=true&characterEncoding=utf-8&useSSL=true
driver-class-name: com.mysql.jdbc.Driver
username: root
###配置读写分离
master-slave-rule:
###配置从库选择策略，提供轮询与随机，这里选择用轮询
load-balance-algorithm-type: round_robin
####指定从数据库
slave-data-source-names: ds_slave_0
name: ds_ms
####指定主数据库
master-data-source-name: ds_master
3 .master 和 slave 配置文件。
import java.sql.SQLException;
import java.util.Map;
import javax.sql.DataSource;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
import org.springframework.boot.context.properties.EnableConfigurationProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import com.google.common.collect.Maps;
import io.shardingjdbc.core.api.MasterSlaveDataSourceFactory;
import lombok.extern.log4j.Log4j2;
@Configuration
@EnableConfigurationProperties(ShardingMasterSlaveConfig.class)
@Log4j2
// 读取ds_master主数据源和读写分离配置
@ConditionalOnProperty({ "sharding.jdbc.data-sources.ds_master.jdbc-url",
"sharding.jdbc.master-slave-rule.master-data-source-name" })
public class ShardingDataSourceConfig {
@Autowired
private ShardingMasterSlaveConfig shardingMasterSlaveConfig;
@Bean
public DataSource masterSlaveDataSource() throws SQLException {
final Map<String, DataSource> dataSourceMap = Maps.newHashMap();
dataSourceMap.putAll(shardingMasterSlaveConfig.getDataSources());
final Map<String, Object> newHashMap = Maps.newHashMap();
// 创建 MasterSlave数据源
DataSource dataSource = MasterSlaveDataSourceFactory.createDataSource(dataSourceMap,
shardingMasterSlaveConfig.getMasterSlaveRule(), newHashMap);
log.info("masterSlaveDataSource config complete");
return dataSource;
}
}
import java.util.HashMap;
import java.util.Map;
import org.springframework.boot.context.properties.ConfigurationProperties;
import com.zaxxer.hikari.HikariDataSource;
import io.shardingjdbc.core.api.config.MasterSlaveRuleConfiguration;
import lombok.Data;
@Data
@ConfigurationProperties(prefix = "sharding.jdbc")
public class ShardingMasterSlaveConfig {
// 存放本地多个数据源
private Map<String, HikariDataSource> dataSources = new HashMap<>();
private MasterSlaveRuleConfiguration masterSlaveRule;
}
