<!--JTA組件核心依賴-->
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-jta-atomikos</artifactId>
</dependency>

spring:
  jta:
    enabled: true
    transaction-manager-id: jtaManager
  datasource:
    username: root
    password: 123456
    url: jdbc:mysql://localhost:3306/test1?useUnicode=true&characterEncoding=utf-8&allowMultiQueries=true&useSSL=false&allowPublicKeyRetrieval=true
    driver-class-name: com.mysql.jdbc.Driver
  backdatasource:
    username: root
    password: 123456
    url: jdbc:mysql://localhost:3306/test2?useUnicode=true&characterEncoding=utf-8&allowMultiQueries=true&useSSL=false&allowPublicKeyRetrieval=true
    driver-class-name: com.mysql.jdbc.Driver

package com.sgcc.qfjs.config;

import com.mysql.jdbc.jdbc2.optional.MysqlXADataSource;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.autoconfigure.jdbc.DataSourceProperties;
import org.springframework.boot.jta.atomikos.AtomikosDataSourceBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Primary;
import org.springframework.core.env.Environment;
import org.springframework.jdbc.core.JdbcTemplate;

import javax.sql.DataSource;


@Configuration
public class JtaDataSourceConfig {

    @Autowired
    private Environment env;

    @Autowired
    private DataSourceProperties properties;

    @Bean
    @Primary
    public DataSource primaryDatasource() {
        //數據庫鏈接
        MysqlXADataSource mysqlXADataSource = new MysqlXADataSource();
        mysqlXADataSource.setUrl(properties.getUrl());
        mysqlXADataSource.setUser(properties.getUsername());
        mysqlXADataSource.setPassword(properties.getPassword());
        mysqlXADataSource.setPinGlobalTxToPhysicalConnection(true);
        //事務管理
        AtomikosDataSourceBean atomikosDataSourceBean = new AtomikosDataSourceBean();
        atomikosDataSourceBean.setXaDataSource(mysqlXADataSource);
        atomikosDataSourceBean.setUniqueResourceName("dataSource");
        return atomikosDataSourceBean;
    }

    @Bean
    public DataSource backDatasource() {
        //數據庫鏈接
        MysqlXADataSource mysqlXADataSource = new MysqlXADataSource();
        mysqlXADataSource.setUrl(env.getProperty("spring.backdatasource.url"));
        mysqlXADataSource.setUser(env.getProperty("spring.backdatasource.username"));
        mysqlXADataSource.setPassword(env.getProperty("spring.backdatasource.password"));
        mysqlXADataSource.setPinGlobalTxToPhysicalConnection(true);
        //事務管理
        AtomikosDataSourceBean atomikosDataSourceBean = new AtomikosDataSourceBean();
        atomikosDataSourceBean.setXaDataSource(mysqlXADataSource);
        atomikosDataSourceBean.setUniqueResourceName("backDataSource");
        return atomikosDataSourceBean;
    }

    @Bean("primaryTemplate")
    public JdbcTemplate primaryTemplate(){
        return new JdbcTemplate(primaryDatasource());
    }

    @Bean("backTemplate")
    public JdbcTemplate batchTemplate(){
        return new JdbcTemplate(backDatasource());
    }

}

@Service
@Slf4j
public class CatTestServiceImpl extends ServiceImpl<CatTestMapper, CatTest> implements CatTestService {

    @Autowired
    private JdbcTemplate primaryTemplate;
    @Autowired
    private JdbcTemplate backTemplate;

    @Override
    @Transactional
    public void tx() {
        // 修改test1庫中的數據
        primaryTemplate.update("update user set age = ? where name = ?", 40, "aaa");
        // 修改test2庫中的數據
        backTemplate.update("update user set age = ? where name = ?", 40, "aaa");
    }

    @Override
    @Transactional
    public void tx2() {
        // 修改test1庫中的數據
        primaryTemplate.update("update user set age = ? where name = ?", 50, "aaa");
        // 模擬：修改test2庫之前拋出異常
        throw new RuntimeException();
    }
}

package com.sgcc.qfjs.hsf;

import com.sgcc.qfjs.module.service.CatTestService;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;

@RunWith(SpringRunner.class)
@SpringBootTest
public class AppTest {

    @Autowired
    private CatTestService catTestService;

    @Test
    public void test1() throws Exception {
        // 正確更新的情況
        catTestService.tx();
    }

    @Test
    public void test2() throws Exception {
        // 更新失敗的情況
        try {
            catTestService.tx2();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

}