SpringBoot+Mybatis 配置多数据源及事务管理

目录

1.多数据源

2.事务配置

---

项目搭建参考:

从零开始搭建SpringBoot项目_从0搭建springboot项目-CSDN博客

SpringBoot学习笔记(二) 整合redis+mybatis+Dubbo-CSDN博客

1.多数据源

添加依赖

        
            org.springframework.boot
            spring-boot-starter-web
        
        
            org.springframework.boot
            spring-boot-starter-test
            test
        
        
            org.apache.commons
            commons-lang3
            3.5
        
        
        
            org.mybatis.spring.boot
            mybatis-spring-boot-starter
            2.2.2
        

        
        
            mysql
            mysql-connector-java
            5.1.31
        
        
            org.projectlombok
            lombok
            1.16.10
        
    

增加数据库配置

spring.datasource.primary.jdbc-url=jdbc:mysql://xxxx/table01?useUnicode=true&autoReconnect=true&zeroDateTimeBehavior=convertToNull
spring.datasource.primary.username=xxxxx
spring.datasource.primary.password=xxxxx
spring.datasource.primary.driver-class-name=com.mysql.jdbc.Driver

spring.datasource.second.jdbc-url=jdbc:mysql://xxxxx/table02?useUnicode=true&autoReconnect=true&&zeroDateTimeBehavior=convertToNull
spring.datasource.second.username=xxxxx
spring.datasource.second.password=xxxxx
spring.datasource.second.driver-class-name=com.mysql.jdbc.Driver

添加配置类

PrimaryDbConfig.java

@Configuration
@MapperScan(basePackages = {"com.ziroom.dao.primary"}, sqlSessionFactoryRef = "primarySqlSessionFactory")
public class PrimaryDbConfig {

    @Primary   // 这里要添加@Primary,在匹配不到数据源时,primaryData会作为默认数据源
    @Bean(name = "primaryData")
    @ConfigurationProperties(prefix = "spring.datasource.primary")
    public DataSource financeData() {
        return DataSourceBuilder.create().build();
    }

    @Bean(name = "primarySqlSessionFactory")
    @Primary
    public SqlSessionFactory loanSqlSessionFactory(@Qualifier("primaryData") DataSource dataSource) throws Exception {
        SqlSessionFactoryBean bean = new SqlSessionFactoryBean();
        bean.setDataSource(dataSource);
        bean.setMapperLocations(new PathMatchingResourcePatternResolver().getResources("classpath:mapper/*.xml"));
        return bean.getObject();
    }

    @Bean(name = "primarySqlSessionTemplate")
    @Primary
    public SqlSessionTemplate loanSqlSessionTemplate(@Qualifier("primarySqlSessionFactory") SqlSessionFactory sqlSessionFactory) {
        return new SqlSessionTemplate(sqlSessionFactory);
    }
}

    // 事务配置
    @Bean(name = "primaryTransactionManager")
    @Primary
    public DataSourceTransactionManager masterDataSourceTransactionManager(@Qualifier("primaryData") DataSource dataSource) 
  {
        return new DataSourceTransactionManager(dataSource);
    }

SecondDbConfig.java

@Configuration
@MapperScan(basePackages = {"com.ziroom.dao.second"}, sqlSessionFactoryRef = "secondSqlSessionFactory")
public class SecondDbConfig {

    @Bean(name = "secondData")
    @ConfigurationProperties(prefix = "spring.datasource.second")
    public DataSource financeData() {
        return DataSourceBuilder.create().build();
    }

    @Bean(name = "secondSqlSessionFactory")
    public SqlSessionFactory loanSqlSessionFactory(@Qualifier("secondData") DataSource dataSource) throws Exception {
        SqlSessionFactoryBean bean = new SqlSessionFactoryBean();
        bean.setDataSource(dataSource);
        bean.setMapperLocations(new PathMatchingResourcePatternResolver().getResources("classpath:mapper/*.xml"));
        return bean.getObject();
    }

    @Bean(name = "secondSqlSessionTemplate")
    public SqlSessionTemplate loanSqlSessionTemplate(@Qualifier("secondSqlSessionFactory") SqlSessionFactory sqlSessionFactory) {
        return new SqlSessionTemplate(sqlSessionFactory);
    }
}

// 事务配置
@Bean(name = "secondTransactionManager")
    public DataSourceTransactionManager masterDataSourceTransactionManager(@Qualifier("secondData") DataSource dataSource) {
        return new DataSourceTransactionManager(dataSource);
    }

添加mapper相关

启动类屏蔽DataSourceAutoConfiguration.java

注意:类似于SpringBoot学习笔记(二) 整合redis+mybatis+Dubbo-CSDN博客 中单数据源的情况,配置文件中配置了spring.datasource.* ,且@MapperScan(value = "com.xxxx.crm.demo.mapper")加到主类上,说明指定的dao关联了默认的spring.datasource.*, 这种情况则不能排除DataSourceAutoConfiguration.class

添加测试类

@ResponseBody
    @RequestMapping(value = "/testPrimary")
    public String testPrimary(){
        Budget budget = new Budget();
        List budgets = budgetMapper.queryBudgetActualList(budget);
        log.info("Primary 数据源查询 size:{}", budgets.size());
        return "success";
    }

-- 输出:Primary 数据源查询 size:30

    @ResponseBody
    @RequestMapping(value = "/testSecond")
    public String testSecond(){
        Invoice invoice = new Invoice();
        List invoices = invoiceMapper.selectListByParams(invoice);
        log.info("Second 数据源查询 size:{}", invoices.size());
        return "success";
    }
-- 输出:Second 数据源查询 size:40

2.事务配置

PrimaryDbConfig.java中增加

@Bean(name = "primaryTransactionManager")
    public DataSourceTransactionManager masterDataSourceTransactionManager(@Qualifier("primaryData") DataSource dataSource) {
        return new DataSourceTransactionManager(dataSource);
    }

SecondDbConfig.java中增加

@Bean(name = "secondTransactionManager")
    public DataSourceTransactionManager masterDataSourceTransactionManager(@Qualifier("secondData") DataSource dataSource) {
        return new DataSourceTransactionManager(dataSource);
    }

测试类 BudgetService.java

@Service
public class BudgetService {

    @Autowired
    private BudgetMapper budgetMapper;

    @Autowired
    private InvoiceMapper invoiceMapper;


    @Transactional(value="primaryTransactionManager",rollbackFor = RuntimeException.class)
    public void saveBudget(Budget budget) {
        budget.setBudgetYear(1);
        budget.setBudgetMonth(1);
        budget.setPartner("2");
        budgetMapper.insertSelective(budget);
        if(true){
            throw new RuntimeException("数据源1抛出异常");
        }
    }

    @Transactional(value="secondTransactionManager",rollbackFor = RuntimeException.class)
    public void saveInvoice(Invoice invoice) {
        invoice.setPostingDate(new Date());
        invoice.setAdvancePayment("x");
        invoice.setInvoiceDate(new Date());
        invoice.setJournalDate(new Date());
        invoice.setAllocateRowNo(1);
        invoiceMapper.insertSelective(invoice);
        if(true){
            throw new RuntimeException("数据源2抛出异常");
        }

    }
}

启动类加:@EnableTransactionManagement

代码详见https://github.com/lizhjian/SpringBootTest