spring boot定时器实现定时同步数据

前言

一、依赖和目录结构

<dependencies>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter</artifactId>
        <version>2.3.12.RELEASE</version>
    </dependency>

    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
        <version>2.3.12.RELEASE</version>
    </dependency>


    <dependency>
        <groupId>com.baomidou</groupId>
        <artifactId>mybatis-plus-boot-starter</artifactId>
        <version>3.5.1</version>
    </dependency>

    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <version>5.1.49</version>
    </dependency>

</dependencies>

配置文件

server:
  port: 8089

spring:
  datasource:
    remote :
      driver-class-name: com.mysql.jdbc.Driver
      jdbc-url: jdbc:mysql://192.168.31.2/student?useUnicode=true&characterEncoding=UTF-8&useSSL=false&serverTimezone=UTC
      username: root
      password: 111
    local :
      driver-class-name: com.mysql.jdbc.Driver
      jdbc-url: jdbc:mysql://192.168.31.1/student?useUnicode=true&characterEncoding=UTF-8&useSSL=false&serverTimezone=UTC
      username: root
      password: 111


mybatis-plus:
  configuration:
    log-impl: org.apache.ibatis.logging.stdout.StdOutImpl #开启sql日志

二、使用步骤

2.1 两个数据源的不同引用配置

package com.config;

import com.baomidou.mybatisplus.extension.spring.MybatisSqlSessionFactoryBean;
import org.apache.ibatis.session.SqlSessionFactory;
import org.mybatis.spring.SqlSessionFactoryBean;
import org.mybatis.spring.SqlSessionTemplate;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.boot.jdbc.DataSourceBuilder;
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.annotation.Resource;
import javax.sql.DataSource;

/**
 *
 * @date ：Created in 2023/12/2 19:51
 * @description：本地数据源
 * @modified By：
 * @version:
 */
@Configuration
@MapperScan(basePackages = "com.local.Mapper", sqlSessionTemplateRef = "sqlSessionTemplate1")
public class MybatisLocalConfig {

    @Bean
    @ConfigurationProperties(prefix = "spring.datasource.local")
    public DataSource dataSource1() {
        return DataSourceBuilder.create().build();
    }

    @Bean
    public SqlSessionFactory sqlSessionFactory1(@Qualifier("dataSource1") DataSource dataSource) throws Exception {
        MybatisSqlSessionFactoryBean factoryBean = new MybatisSqlSessionFactoryBean();
        factoryBean.setDataSource(dataSource);
        // 设置mapper.xml文件的位置
        factoryBean.setMapperLocations(new PathMatchingResourcePatternResolver().getResources("classpath*:localmapper/*.xml"));
        return factoryBean.getObject();
    }

    @Bean
    public SqlSessionTemplate sqlSessionTemplate1(@Qualifier("sqlSessionFactory1") SqlSessionFactory sqlSessionFactory) {
        return new SqlSessionTemplate(sqlSessionFactory);
    }



}

@Configuration
@MapperScan(basePackages = "com.remote.Mapper", sqlSessionTemplateRef = "sqlSessionTemplate2")
public class MybatisRemoteConfig {

    @Bean
    @ConfigurationProperties(prefix = "spring.datasource.remote")
    public DataSource dataSource2() {
        return DataSourceBuilder.create().build();
    }

    @Bean
    public SqlSessionFactory sqlSessionFactory2(@Qualifier("dataSource2") DataSource dataSource) throws Exception {
        MybatisSqlSessionFactoryBean factoryBean = new MybatisSqlSessionFactoryBean();
        factoryBean.setDataSource(dataSource);
        // 设置mapper.xml文件的位置
        factoryBean.setMapperLocations(new PathMatchingResourcePatternResolver().getResources("classpath*:mapper2/*.xml"));
        return factoryBean.getObject();
    }

    @Bean
    public SqlSessionTemplate sqlSessionTemplate2(@Qualifier("sqlSessionFactory2") SqlSessionFactory sqlSessionFactory) {
        return new SqlSessionTemplate(sqlSessionFactory);
    }
}

2.2 对应的mapper

public interface CourseOneMapper extends BaseMapper<Course> {
}

public interface CourseTwoMapper extends BaseMapper<Course> {


    /**
     * 批量插入
     * @param list
     */
    @Insert("<script> " +
            "INSERT INTO tbl_course (name, teacher) VALUES " +
            "<foreach collection='list' item='item' separator=','> " +
            "(#{item.name}, #{item.teacher})" +
            "</foreach> " +
            "</script>")
    void batchInsert(@Param("list") List<Course> list);
}

@TableName("tbl_course")
public class Course {


    @TableId(type = IdType.AUTO)
    private Integer id;
    private String name;
    private String teacher;


    public Course() {
    }

    public Course(Integer id, String name, String teacher) {
        this.id = id;
        this.name = name;
        this.teacher = teacher;
    }

    /**
     * 获取
     * @return id
     */
    public Integer getId() {
        return id;
    }

    /**
     * 设置
     * @param id
     */
    public void setId(Integer id) {
        this.id = id;
    }

    /**
     * 获取
     * @return name
     */
    public String getName() {
        return name;
    }

    /**
     * 设置
     * @param name
     */
    public void setName(String name) {
        this.name = name;
    }

    /**
     * 获取
     * @return teacher
     */
    public String getTeacher() {
        return teacher;
    }

    /**
     * 设置
     * @param teacher
     */
    public void setTeacher(String teacher) {
        this.teacher = teacher;
    }

  @Override
    public String toString() {
        return "Course{id = " + id + ", name = " + name + ", teacher = " + teacher + "}";
    }
}

2.3 定时任务处理 

@EnableScheduling //开启定时
@Component
public class MySchedule {


    @Resource
    private CourseOneMapper courseOneMapper;

    @Resource
    private CourseTwoMapper courseTwoMapper;



    /**
     * 每隔10秒执行一次
     */
    @Scheduled(fixedDelay = 1000000)
    public void test(){

        //查询到要同步的数据
        List<Course> coursesOne = courseOneMapper.selectList(null);

        //批量插入
        courseTwoMapper.batchInsert(coursesOne);


    }



}

总结