系列导航

springBoot项目打jar包

1、springboot工程新建（单模块）

2、springboot创建多模块工程

3、springboot连接数据库

4、SpringBoot连接数据库引入druid

5、SpringBoot连接数据库引入mybatis

6、SpringBoot-mybatis分页实现pagehelper

7、SpringBoot-mybatis-plus引入

8、SpringBoot 事务

9、SpringBoot-mybatis-druid多源数据多源数据

10、SpringBoot-mybatis-plus-druid多源数据

11、SpringBoot-mybatis-plus-druid多源数据事务

12、SpringBoot-mybatis-plus-ehcache

未完待续

上一篇博客中因为多源项目的事务没有解决，本篇博客介绍一种可以在多源项目中让事务生效的方法，mybatis-plus配置多源数据还要使的事务生效，需要引入新的依赖atomikos

1数据库中创建表

zy数据库：

CREATE TABLE TEST_BLOCK_T

(

  BLOCK_ID         VARCHAR2(10 BYTE) PRIMARY   KEY,    --编码

  BLOCK_NAME       VARCHAR2(200 BYTE)                    --资源名称

);

 Insert into TEST_BLOCK_T (BLOCK_ID, BLOCK_NAME) Values ('1', 'java');

COMMIT;

yc数据库：

CREATE TABLE TEST_USER_T

(

  USER_ID         VARCHAR2(10 BYTE) PRIMARY   KEY,

  NAME            VARCHAR2(200 BYTE)

);

Insert into TEST_USER_T (USER_ID, NAME) Values ('1', '张三');

COMMIT;

2、pom.xml

 <properties>

        <java.version>1.8</java.version>

        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>

        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>

        <spring-boot.version>2.1.17.RELEASE</spring-boot.version>

    </properties>

    <dependencies>

        <dependency>

            <groupId>org.springframework.boot</groupId>

            <artifactId>spring-boot-starter-web</artifactId>

        </dependency>

        <dependency>

            <groupId>org.springframework.boot</groupId>

            <artifactId>spring-boot-starter-test</artifactId>

            <scope>test</scope>

        </dependency>

        <!--阿里数据库连接池 -->

        <dependency>

            <groupId>com.alibaba</groupId>

            <artifactId>druid-spring-boot-starter</artifactId>

            <version>1.1.20</version>

        </dependency>

        <!--mybatis-plus-->

        <dependency>

            <groupId>com.baomidou</groupId>

            <artifactId>mybatis-plus-boot-starter</artifactId>

            <version>3.3.1</version>

        </dependency>

        <!--分布式事务-->

        <dependency>

            <groupId>org.springframework.boot</groupId>

            <artifactId>spring-boot-starter-jta-atomikos</artifactId>

        </dependency>

        <!-- oracle驱动 -->

        <dependency>

            <groupId>com.oracle</groupId>

            <artifactId>ojdbc6</artifactId>

            <version>11.2.0.3</version>

        </dependency>

        <!-- 省略get/set等方法 日志打印 -->

        <dependency>

            <groupId>org.projectlombok</groupId>

            <artifactId>lombok</artifactId>

            <optional>true</optional>

        </dependency>

    </dependencies>

3、      application.properties配置

# 应用名称

spring.application.name=demo

# 应用服务 WEB 访问端口

server.port=8080

spring.datasource.type=com.alibaba.druid.pool.xa.DruidXADataSource

spring.datasource.druid.one.name=oneDataSource

spring.datasource.druid.one.url=jdbc:oracle:thin:@192.168.0.100:1521:orcl

spring.datasource.druid.one.driver-class-name=oracle.jdbc.OracleDriver

spring.datasource.druid.one.username=zy

spring.datasource.druid.one.password=1

spring.datasource.druid.one.initialSize=5

spring.datasource.druid.one.minIdle=5

spring.datasource.druid.one.maxActive=20

spring.datasource.druid.one.maxWait=60000

spring.datasource.druid.one.timeBetweenEvictionRunsMillis=60000

spring.datasource.druid.one.minEvictableIdleTimeMillis=300000

spring.datasource.druid.one.validationQuery= SELECT 1 from dual

spring.datasource.druid.one.validationQueryTimeout=10000

spring.datasource.druid.one.testWhileIdle=true

spring.datasource.druid.one.testOnBorrow=false

spring.datasource.druid.one.testOnReturn=false

spring.datasource.druid.one.poolPreparedStatements=true

spring.datasource.druid.one.maxPoolPreparedStatementPerConnectionSize=20

spring.datasource.druid.one.filters=stat,wall

spring.datasource.druid.one.connectionProperties=druid.stat.mergeSql=true;druid.stat.slowSqlMillis=5000

spring.datasource.druid.one.useGlobalDataSourceStat=true

spring.datasource.druid.two.name=twoDataSource

spring.datasource.druid.two.url=jdbc:oracle:thin:@192.168.0.100:1521:orcl

spring.datasource.druid.two.driver-class-name=oracle.jdbc.OracleDriver

spring.datasource.druid.two.username=yc

spring.datasource.druid.two.password=1

spring.datasource.druid.two.initialSize=5

spring.datasource.druid.two.minIdle=5

spring.datasource.druid.two.maxActive=20

spring.datasource.druid.two.maxWait=60000

spring.datasource.druid.two.timeBetweenEvictionRunsMillis=60000

spring.datasource.druid.two.minEvictableIdleTimeMillis=300000

spring.datasource.druid.two.validationQuery=SELECT 1 from dual

spring.datasource.druid.two.validationQueryTimeout=10000

spring.datasource.druid.two.testWhileIdle=true

spring.datasource.druid.two.testOnBorrow=false

spring.datasource.druid.two.testOnReturn=false

spring.datasource.druid.two.poolPreparedStatements=true

spring.datasource.druid.two.maxPoolPreparedStatementPerConnectionSize=20

spring.datasource.druid.two.filters=stat,wall

spring.datasource.druid.two.connectionProperties=druid.stat.mergeSql=true;druid.stat.slowSqlMillis=5000

spring.datasource.druid.two.useGlobalDataSourceStat=true

spring.jta.atomikos.properties.log-base-dir=tx-logs

spring.jta.transaction-manager-id=txManager

4、文件目录

5、源码

package com.example.demo;

import org.springframework.boot.SpringApplication;

import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication

public class DemoApplication {

    private org.springframework.dao.support.DaoSupport dao ;

    public static void main(String[] args) {

        SpringApplication.run(DemoApplication.class, args);

    }

}
package com.example.demo.config;

import com.alibaba.druid.filter.stat.StatFilter;

import com.alibaba.druid.support.http.StatViewServlet;

import com.alibaba.druid.support.http.WebStatFilter;

import com.alibaba.druid.wall.WallConfig;

import com.alibaba.druid.wall.WallFilter;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.boot.jta.atomikos.AtomikosDataSourceBean;

import org.springframework.boot.web.servlet.FilterRegistrationBean;

import org.springframework.boot.web.servlet.ServletRegistrationBean;

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 java.util.Properties;

/**

 * 多数据源和Druid配置

 *

 * @author leilei

 */

@Configuration

public class DruidConfig {

    /**

     * 数据源1配置   使用AtomikosDataSourceBean 支持多数据源事务

     *

     * @param env

     * @return Primary 指定主库  （必须指定一个主库 否则会报错）

     */

    @Bean(name = "MybatisPlusOneDataSource")

    @Primary

    @Autowired

    public AtomikosDataSourceBean oneDataSource(Environment env) {

        AtomikosDataSourceBean ds = new AtomikosDataSourceBean();

        Properties prop = build(env, "spring.datasource.druid.one.");

        ds.setXaDataSourceClassName("com.alibaba.druid.pool.xa.DruidXADataSource");

        ds.setUniqueResourceName("oneDataSource");

        ds.setPoolSize(5);

        ds.setXaProperties(prop);

        return ds;

    }

    /**

     * 数据源2配置  使用AtomikosDataSourceBean 支持多数据源事务

     *

     * @param env

     * @return

     */

    @Autowired

    @Bean(name = "MybatisPlusTwoDataSource")

    public AtomikosDataSourceBean twoDataSource(Environment env) {

        AtomikosDataSourceBean ds = new AtomikosDataSourceBean();

        Properties prop = build(env, "spring.datasource.druid.two.");

        ds.setXaDataSourceClassName("com.alibaba.druid.pool.xa.DruidXADataSource");

        ds.setUniqueResourceName("twoDataSource");

        ds.setPoolSize(5);

        ds.setXaProperties(prop);

        return ds;

    }

//    @Autowired

//    @Bean(name = "MybatisPlusThreeDataSource")

//    public AtomikosDataSourceBean threeDataSource(Environment env) {

//        AtomikosDataSourceBean ds = new AtomikosDataSourceBean();

//        Properties prop = build(env, "spring.datasource.druid.three.");

//        ds.setXaDataSourceClassName("com.alibaba.druid.pool.xa.DruidXADataSource");

//        ds.setUniqueResourceName("threeDataSource");

//        ds.setPoolSize(5);

//        ds.setXaProperties(prop);

//        return ds;

//    }

//    /**

//     * 注入事物管理器

//     * @return

//     */

//    @Bean(name = "leijta")

//    public JtaTransactionManager regTransactionManager () {

//        UserTransactionManager userTransactionManager = new UserTransactionManager();

//        UserTransaction userTransaction = new UserTransactionImp();

//        return new JtaTransactionManager(userTransaction, userTransactionManager);

//    }

    /**

     * 从配置文件中加载数据源信息

     *

     * @param env

     * @param prefix

     * @return

     */

    private Properties build(Environment env, String prefix) {

        Properties prop = new Properties();

        prop.put("url", env.getProperty(prefix + "url"));

        prop.put("username", env.getProperty(prefix + "username"));

        prop.put("password", env.getProperty(prefix + "password"));

        prop.put("driverClassName", env.getProperty(prefix + "driverClassName", ""));

        prop.put("initialSize", env.getProperty(prefix + "initialSize", Integer.class));

        prop.put("maxActive", env.getProperty(prefix + "maxActive", Integer.class));

        prop.put("minIdle", env.getProperty(prefix + "minIdle", Integer.class));

        prop.put("maxWait", env.getProperty(prefix + "maxWait", Integer.class));

        prop.put("poolPreparedStatements", env.getProperty(prefix + "poolPreparedStatements", Boolean.class));

        prop.put("maxPoolPreparedStatementPerConnectionSize",

                env.getProperty(prefix + "maxPoolPreparedStatementPerConnectionSize", Integer.class));

        prop.put("maxPoolPreparedStatementPerConnectionSize",

                env.getProperty(prefix + "maxPoolPreparedStatementPerConnectionSize", Integer.class));

        prop.put("validationQuery", env.getProperty(prefix + "validationQuery"));

        prop.put("validationQueryTimeout", env.getProperty(prefix + "validationQueryTimeout", Integer.class));

        prop.put("testOnBorrow", env.getProperty(prefix + "testOnBorrow", Boolean.class));

        prop.put("testOnReturn", env.getProperty(prefix + "testOnReturn", Boolean.class));

        prop.put("testWhileIdle", env.getProperty(prefix + "testWhileIdle", Boolean.class));

        prop.put("timeBetweenEvictionRunsMillis",

                env.getProperty(prefix + "timeBetweenEvictionRunsMillis", Integer.class));

        prop.put("minEvictableIdleTimeMillis", env.getProperty(prefix + "minEvictableIdleTimeMillis", Integer.class));

        prop.put("filters", env.getProperty(prefix + "filters"));

        return prop;

    }

    /**

     * druid访问配置

     *

     * @return

     */

    @Bean

    public ServletRegistrationBean druidServlet() {

        ServletRegistrationBean servletRegistrationBean = new ServletRegistrationBean(new StatViewServlet(), "/druid/*");

        //控制台管理用户，加入下面2行 进入druid后台就需要登录

        servletRegistrationBean.addInitParameter("loginUsername", "leilei");

        servletRegistrationBean.addInitParameter("loginPassword", "123456");

        return servletRegistrationBean;

    }

    @Bean

    public FilterRegistrationBean filterRegistrationBean() {

        FilterRegistrationBean filterRegistrationBean = new FilterRegistrationBean();

        filterRegistrationBean.setFilter(new WebStatFilter());

        filterRegistrationBean.addUrlPatterns("/*");

        filterRegistrationBean.addInitParameter("exclusions", "*.js,*.gif,*.jpg,*.png,*.css,*.ico,/druid/*");

        filterRegistrationBean.addInitParameter("profileEnable", "true");

        return filterRegistrationBean;

    }

    @Bean

    public StatFilter statFilter() {

        StatFilter statFilter = new StatFilter();

        //slowSqlMillis用来配置SQL慢的标准，执行时间超过slowSqlMillis的就是慢。

        statFilter.setLogSlowSql(true);

        //SQL合并配置

        statFilter.setMergeSql(true);

        //slowSqlMillis的缺省值为3000，也就是3秒。

        statFilter.setSlowSqlMillis(1000);

        return statFilter;

    }

    @Bean

    public WallFilter wallFilter() {

        WallFilter wallFilter = new WallFilter();

        //允许执行多条SQL

        WallConfig config = new WallConfig();

        config.setMultiStatementAllow(true);

        wallFilter.setConfig(config);

        return wallFilter;

    }

}
package com.example.demo.config;

import org.springframework.web.bind.annotation.ExceptionHandler;

import org.springframework.web.bind.annotation.RestControllerAdvice;

import javax.servlet.http.HttpServletRequest;

import java.util.HashMap;

import java.util.Map;

/**

 * @author : leilei

 * @date : 14:20 2020/3/5

 * @desc : 自定义异常响应

 */

@RestControllerAdvice

public class ExceptionHadler {

    @ExceptionHandler(value = Exception.class)

    public Map<String, Object> exceptionHandler(HttpServletRequest req, Exception e) {

        HashMap<String, Object> map = new HashMap<>(4);

        map.put("请求状态", "False");

        map.put("请求路径", req.getRequestURI());

        map.put("请求方式", req.getMethod());

        map.put("错误信息", e.getMessage());

        return map;

    }

}

配置数据源1

package com.example.demo.config;

import com.baomidou.mybatisplus.core.MybatisConfiguration;

import com.baomidou.mybatisplus.extension.plugins.PaginationInterceptor;

import com.baomidou.mybatisplus.extension.spring.MybatisSqlSessionFactoryBean;

import org.apache.ibatis.logging.stdout.StdOutImpl;

import org.apache.ibatis.session.SqlSessionFactory;

import org.mybatis.spring.SqlSessionTemplate;

import org.mybatis.spring.annotation.MapperScan;

import org.springframework.beans.factory.annotation.Qualifier;

import org.springframework.context.annotation.Bean;

import org.springframework.context.annotation.Configuration;

import org.springframework.context.annotation.Primary;

import org.springframework.core.io.support.PathMatchingResourcePatternResolver;

import javax.sql.DataSource;

/**

 * @author leilei

 */

@Configuration

@MapperScan(basePackages = "com.example.demo.mapper.one", sqlSessionFactoryRef = "oneSqlSessionFactory")

public class OneDataSourceConfig {

    @Primary

    @Bean(name = "oneSqlSessionFactory")

    public SqlSessionFactory sqlSessionFactory(@Qualifier("MybatisPlusOneDataSource") DataSource dataSource) throws Exception {

        //配置myabtisSqlSession

        MybatisSqlSessionFactoryBean sessionFactoryBean = new MybatisSqlSessionFactoryBean();

        // 指明mapper.xml位置(配置文件中指明的xml位置会失效用此方式代替，具体原因未知)

        //sessionFactoryBean.setMapperLocations(new PathMatchingResourcePatternResolver().getResources("classpath:com/leilei/mapper/one/*/*Mapper.xml"));

        // 指明实体扫描(多个package用逗号或者分号分隔)

        sessionFactoryBean.setTypeAliasesPackage("com.example.demo.entity.one");

        MybatisConfiguration mybatisConfiguration = new MybatisConfiguration();

        // mybatisConfiguration.setJdbcTypeForNull(JdbcType.NULL);

        //驼峰

        mybatisConfiguration.setMapUnderscoreToCamelCase(true);

        //是否开启缓存

        mybatisConfiguration.setCacheEnabled(false);

        //多数据源下分页模式

        mybatisConfiguration.addInterceptor(new PaginationInterceptor());

        // 配置打印sql语句

        mybatisConfiguration.setLogImpl(StdOutImpl.class);

        sessionFactoryBean.setConfiguration(mybatisConfiguration);

        //数据源注入

        sessionFactoryBean.setDataSource(dataSource);

        return sessionFactoryBean.getObject();

    }

    @Primary

    @Bean(name = "oneSqlSessionTemplate")

    public SqlSessionTemplate sqlSessionTemplate(@Qualifier("oneSqlSessionFactory") SqlSessionFactory sqlSessionFactory) {

        return new SqlSessionTemplate(sqlSessionFactory);

    }

}

配置数据源2  需要几个就配置几个

package com.example.demo.config;

import com.baomidou.mybatisplus.core.MybatisConfiguration;

import com.baomidou.mybatisplus.extension.plugins.PaginationInterceptor;

import com.baomidou.mybatisplus.extension.spring.MybatisSqlSessionFactoryBean;

import org.apache.ibatis.logging.stdout.StdOutImpl;

import org.apache.ibatis.session.SqlSessionFactory;

import org.mybatis.spring.SqlSessionTemplate;

import org.mybatis.spring.annotation.MapperScan;

import org.springframework.beans.factory.annotation.Qualifier;

import org.springframework.context.annotation.Bean;

import org.springframework.context.annotation.Configuration;

import org.springframework.core.io.support.PathMatchingResourcePatternResolver;

import javax.sql.DataSource;

/**

 * @author leilei

 */

@Configuration

@MapperScan(basePackages = "com.example.demo.mapper.two", sqlSessionFactoryRef = "twoSqlSessionFactory")

public class TwoDataSourceConfig {

    @Bean(name = "twoSqlSessionFactory")

    public SqlSessionFactory sqlSessionFactory(@Qualifier("MybatisPlusTwoDataSource") DataSource dataSource) throws Exception {

        //配置myabtisSqlSession

        MybatisSqlSessionFactoryBean sessionFactoryBean = new MybatisSqlSessionFactoryBean();

        // 指明mapper.xml位置(配置文件中指明的xml位置会失效用此方式代替，具体原因未知)

        //sessionFactoryBean.setMapperLocations(new PathMatchingResourcePatternResolver().getResources("classpath:com/leilei/mapper/two/*/*Mapper.xml"));

        // 指明实体扫描(多个package用逗号或者分号分隔)

        sessionFactoryBean.setTypeAliasesPackage("com.example.demo.entity.two");

        MybatisConfiguration mybatisConfiguration = new MybatisConfiguration();

        //mybatisConfiguration.setJdbcTypeForNull(JdbcType.NULL);

        //驼峰

        mybatisConfiguration.setMapUnderscoreToCamelCase(true);

        //是否开启缓存

        mybatisConfiguration.setCacheEnabled(false);

        //多数据源下分页模式

        mybatisConfiguration.addInterceptor(new PaginationInterceptor());

        // 配置打印sql语句

        mybatisConfiguration.setLogImpl(StdOutImpl.class);

        sessionFactoryBean.setConfiguration(mybatisConfiguration);

        //数据源注入

        sessionFactoryBean.setDataSource(dataSource);

        return sessionFactoryBean.getObject();

    }

    @Bean(name = "twoSqlSessionTemplate")

    public SqlSessionTemplate sqlSessionTemplate(@Qualifier("twoSqlSessionFactory") SqlSessionFactory sqlSessionFactory) {

        return new SqlSessionTemplate(sqlSessionFactory);

    }

}
package com.example.demo.controller;

import com.example.demo.service.ManySourceService;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.web.bind.annotation.*;

@RestController

@RequestMapping("/hello")

public class ManySourceController {

    @Autowired

    ManySourceService manySourceService;

    @GetMapping("/getZyBlock")

    @ResponseBody

    public String test1() {

        return  manySourceService.getZyBlock();

    }

    @GetMapping("/getYcUser")

    @ResponseBody

    public String test2() {

        return manySourceService.getYcUser();

    }

    @PostMapping("/insertZyBlock")

    @ResponseBody

    public String test3() {

        return  manySourceService.insertZyBlock();

    }

    @PostMapping("/insertYcUser")

    @ResponseBody

    public String test4() {

        return manySourceService.insertYcUser();

    }

    @PostMapping("/insertMany")

    @ResponseBody

    public String test5() {

        return manySourceService.insertMany();

    }

}
package com.example.demo.service;

import com.example.demo.entity.one.Block;

import com.example.demo.entity.two.User;

import com.example.demo.mapper.one.BlockMapper;

import com.example.demo.mapper.two.UserMapper;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.stereotype.Service;

import org.springframework.transaction.annotation.Transactional;

@Service

public class ManySourceService {

    //SpringBoot在使用事物Transactional的时候，要在main方法上加上 @EnableTransactionManagement

    // 注解开发事物声明，在使用的service层的公共方法加上 @Transactional (spring)注解。

    @Autowired

    BlockMapper blockMapper;

    @Autowired

    UserMapper userMapper;

    //获取zy库中的block中的数据

    public String getZyBlock() {

        return  blockMapper.selectById("1").toString();

    }

    //获取yc库中的user中的数据

    public String getYcUser() {

        return  userMapper.selectById("2").toString() ;

    }

    public String insertZyBlock() {

        Block block = new Block();

        block.setBlockId("99999");

        block.setBlockName("PHP");

        return  blockMapper.insert(block)+"";

    }

    public String insertYcUser() {

        User user = new User();

        user.setUserId("2");

        user.setName("李四");

        return  userMapper.insert(user)+"";

    }

    @Transactional

    public String insertMany() {

        Block block = new Block();

        block.setBlockId("99999");

        block.setBlockName("PHP");

        blockMapper.insert(block) ;

        int a = 100/0;

        User user = new User();

        user.setUserId("2");

        user.setName("李四");

        userMapper.insert(user) ;

        return "1";

    }

}
package com.example.demo.entity.one;

import com.baomidou.mybatisplus.annotation.TableId;

import com.baomidou.mybatisplus.annotation.TableName;

/**

 * <p>

 * 。

 * </p>

 *

 * @author yc

 * @since 2021-09-18

 */

@TableName(value = "TEST_BLOCK_T")

public class Block {

    private static final long serialVersionUID = 1L;

    @TableId

    private String blockId;

    /**

     * $field.comment。

     */

    private String blockName;

    public String getBlockId() {

        return blockId;

    }

    public void setBlockId(String blockId) {

        this.blockId = blockId;

    }

    public String getBlockName() {

        return blockName;

    }

    public void setBlockName(String blockName) {

        this.blockName = blockName;

    }

    @Override

    public String toString() {

        return "XyDicBlockT{" +

                "blockId='" + blockId + '\'' +

                ", blockName='" + blockName + '\'' +

                '}';

    }

}
package com.example.demo.entity.two;

import com.baomidou.mybatisplus.annotation.TableId;

import com.baomidou.mybatisplus.annotation.TableName;

/**

 * <p>

 * 。

 * </p>

 *

 * @author yc

 * @since 2021-09-18

 */

@TableName(value = "TEST_USER_T")

public class User {

    private static final long serialVersionUID = 1L;

    @TableId

    private String userId;

    /**

     * $field.comment。

     */

    private String name;

    public String getUserId() {

        return userId;

    }

    public void setUserId(String userId) {

        this.userId = userId;

    }

    public String getName() {

        return name;

    }

    public void setName(String name) {

        this.name = name;

    }

    @Override

    public String toString() {

        return "User{" +

                "userId='" + userId + '\'' +

                ", name='" + name + '\'' +

                '}';

    }

}
package com.example.demo.entity.two;

import com.baomidou.mybatisplus.annotation.TableId;

import com.baomidou.mybatisplus.annotation.TableName;

/**

 * <p>

 * 。

 * </p>

 *

 * @author yc

 * @since 2021-09-18

 */

@TableName(value = "TEST_USER_T")

public class User {

    private static final long serialVersionUID = 1L;

    @TableId

    private String userId;

    /**

     * $field.comment。

     */

    private String name;

    public String getUserId() {

        return userId;

    }

    public void setUserId(String userId) {

        this.userId = userId;

    }

    public String getName() {

        return name;

    }

    public void setName(String name) {

        this.name = name;

    }

    @Override

    public String toString() {

        return "User{" +

                "userId='" + userId + '\'' +

                ", name='" + name + '\'' +

                '}';

    }

}
package com.example.demo.mapper.two;

import com.baomidou.mybatisplus.core.mapper.BaseMapper;

import com.example.demo.entity.two.User;

public interface UserMapper extends BaseMapper<User> {

}

6、启动项目访问项目

清空yc库里的表TEST_USER_T 和 zy库里的表TEST_BLOCK_T

（1）访问http://localhost:8080/hello/insertZyBlock 成功插入数据到TEST_BLOCK_T

（2）访问http://localhost:8080/hello/insertYcUser成功插入数据到TEST_USER_T

说明分别向不同数据源的数据库的插入没有问题。

（3）访问http://localhost:8080/hello/getZyBlock

（4）访问http://localhost:8080/hello/getYcUser

说明分别从不同数据源的数据库的查询没有问题。

再次清空yc库里的表TEST_USER_T 和 zy库里的表TEST_BLOCK_T

重头戏来了

（5）访问http://localhost:8080/hello/insertMany

这里添加了事务，并且在插入TEST_BLOCK_T后制造了一个除数为0的错误，如果事务生效，前面插入的数据就应该回滚。

下面可以看到前台返回的消息报错了说了除数为0的错误。

后台开始也插入了数据，但是会发现数据库里并没有插入数据，说清事务生效了。

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