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

<dependencies>
        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starter-webartifactId>
        dependency>
        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starter-testartifactId>
            <scope>testscope>
        dependency>
        <dependency>
            <groupId>org.apache.commonsgroupId>
            <artifactId>commons-lang3artifactId>
            <version>3.5version>
        dependency>
        
        <dependency>
            <groupId>org.mybatis.spring.bootgroupId>
            <artifactId>mybatis-spring-boot-starterartifactId>
            <version>2.2.2version>
        dependency>
 
        
        <dependency>
            <groupId>mysqlgroupId>
            <artifactId>mysql-connector-javaartifactId>
            <version>5.1.31version>
        dependency>
        <dependency>
            <groupId>org.projectlombokgroupId>
            <artifactId>lombokartifactId>
            <version>1.16.10version>
        dependency>
    dependencies>

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

如果配置文件中存在默认的spring.datasource.url，但是配置多数据源时手动指定了引用(见下)，则上述配置依然需要排除

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

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