SpringBoot3+ShardingJDBC5.5.0 讀寫分離配置的實現

更新時間：2024年08月09日 11:26:24 作者：qq_22855851

本文主要介紹了SpringBoot3+ShardingJDBC5.5.0 讀寫分離配置的實現,最新版5.5.0支持SpringBoot3x現分享給大家,具有一定的參考價值,感興趣的可以了解一下

網上自己找了很多教程但是配合SpringBoot3都無法使用，經過實驗發(fā)現只有最新版5.5.0支持SpringBoot3x現在把相關讀寫分離配置分享給大家

相關springboot3的包這里就不多贅述，我使用的是MybatisPlus 3.5.5

首先導入相關jar包

         <dependency>
            <groupId>org.apache.shardingsphere</groupId>
            <artifactId>shardingsphere-jdbc</artifactId>
            <version>5.5.0</version>
            <exclusions>
                <exclusion>
                    <groupId>org.apache.shardingsphere</groupId>
                    <artifactId>shardingsphere-test-util</artifactId>
                </exclusion>
            </exclusions>
        </dependency>

這里放一個完整的pom給大家看看

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <packaging>pom</packaging>
    <groupId>com.yijun.sharding.jdbc</groupId>
    <artifactId>spring-boot3-sharding-jdbc</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>spring-boot3-sharding-jdbc</name>
    <description>Demo project for Spring Boot</description>

    <properties>
        <java.version>17</java.version>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <spring-boot.version>3.2.4</spring-boot.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
            <exclusions>
                <exclusion>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-starter-tomcat</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-undertow</artifactId>
        </dependency>
        <dependency>
            <groupId>com.mysql</groupId>
            <artifactId>mysql-connector-j</artifactId>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>1.18.30</version>
        </dependency>
        <dependency>
            <groupId>org.apache.commons</groupId>
            <artifactId>commons-lang3</artifactId>
            <version>3.13.0</version>
        </dependency>
        <dependency>
            <groupId>jakarta.persistence</groupId>
            <artifactId>jakarta.persistence-api</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-aop</artifactId>
        </dependency>
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>3.0.3</version>
        </dependency>
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-boot-starter</artifactId>
            <version>3.5.5</version>
            <exclusions>
                <exclusion>
                    <groupId>org.mybatis</groupId>
                    <artifactId>mybatis-spring</artifactId>
                </exclusion>
                <exclusion>
                    <artifactId>mybatis</artifactId>
                    <groupId>org.mybatis</groupId>
                </exclusion>
            </exclusions>
        </dependency>
        <dependency>
            <groupId>org.apache.shardingsphere</groupId>
            <artifactId>shardingsphere-jdbc</artifactId>
            <version>5.5.0</version>
            <exclusions>
                <exclusion>
                    <groupId>org.apache.shardingsphere</groupId>
                    <artifactId>shardingsphere-test-util</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
    </dependencies>

    <dependencyManagement>
        <dependencies>
            <!-- 對spring-boot版本統(tǒng)一管理-->
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-dependencies</artifactId>
                <version>${spring-boot.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>
</project>

第二部對springboot的application進行修改

spring:
  main:
    allow-bean-definition-overriding: true
  application:
    name: ls-backend
  datasource:
    driver-class-name: org.apache.shardingsphere.driver.ShardingSphereDriver
    url: jdbc:shardingsphere:classpath:sharding.yaml
  servlet:
    multipart:
      max-file-size: 100MB
      max-request-size: 100MB
server:
  port: 8085
  servlet:
    context-path: /
    encoding:
      force-response: true


#Mybatis掃描
mybatis:
  config-location: classpath:/mybatis-config.xml

mybatis-plus:
  mapper-locations: classpath:/mapper/*Mapper.xml
  configuration:
    log-impl: org.apache.ibatis.logging.stdout.StdOutImp

那么接下來就是重點了，然后是sharding.yaml的相關配置，因為官方的文檔比較碎片化，最后進行校驗和處理得出的完整文檔

dataSources:
  ds_1:
    driverClassName: com.mysql.cj.jdbc.Driver
    dataSourceClassName: com.zaxxer.hikari.HikariDataSource
    jdbcUrl: 
    username: 
    password: 
  ds_2:
    driverClassName: com.mysql.cj.jdbc.Driver
    dataSourceClassName: com.zaxxer.hikari.HikariDataSource
    jdbcUrl: 
    username: 
    password: 
rules:
  - !SINGLE
    tables:
      - "*.*"
    defaultDataSource: ds_1
  - !READWRITE_SPLITTING
    dataSources:
      readwrite_ds:
        writeDataSourceName: ds_1
        readDataSourceNames:
          - ds_2
        transactionalReadQueryStrategy: PRIMARY
        loadBalancerName: random
    loadBalancers:
      random:
        type: RANDOM
props:
  sql-show: true

這里我是用一個讀庫一個寫庫處理，數據庫連接自己填，打印SQL可以開啟可以看到讀和寫走到了不同的庫，至于數據分片就不多贅述，我自己也沒驗證，不過估計在配置文件加入分片規(guī)則就可以做到，還有rules的下的配置一定要寫SINGLE這個不然它會報找不到表的錯誤，還有這個配置目前只有shardingjdbc 5.4.1和5.5.0可以用，其他版本并不通用請不要混用
這里考慮到強制走寫庫的情況自己根據HintManager寫了一個強制主庫的注解和AOP如下:

@Retention(RetentionPolicy.RUNTIME)
@Target(ElementType.METHOD)public @interface Master {}

@Slf4j
@Component
@Aspect
public class ShardingAop {

    @Around("execution(* com.yijun..service.impl.*.*(..))")
    public Object master(ProceedingJoinPoint joinPoint){
        Object[] args = joinPoint.getArgs();
        Object ret = null;
        log.info(joinPoint.toShortString());
        MethodSignature methodSignature = (MethodSignature) joinPoint.getSignature();
        Method method = methodSignature.getMethod();
        Master  master = method.getAnnotation(Master.class);
        HintManager hintManager = null;
        try {
            if (Objects.nonNull(master)) {
                HintManager.clear();
                hintManager = HintManager.getInstance();
                hintManager.setWriteRouteOnly();
            }
            ret = joinPoint.proceed(args);
        }catch (Exception ex){
            log.error("exception error",ex);
        }catch (Throwable ex2){
            log.error("Throwable",ex2);
        }finally {
            if (Objects.nonNull(master) && Objects.nonNull(hintManager)) {
                hintManager.close();
            }
        }
        return ret;
    }
}

設置這個AOP后只要在service實現類方法上加上@Master注解就可以強制走讀庫處理了，其他情況安正常處理

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