springboot集成mybatisPlus+多数据源的实现示例

该项目主要实现mybatisplus、多数据源、lombok、druid的集成

主要参考 https://mp.baomidou.com/guide/quick-start.html
项目地址:https://github.com/Blankwhiter/mybatisplus-springboot release1.0

项目结构:

springboot集成mybatisPlus+多数据源的实现示例_第1张图片

一、创建表以及测试数据

CREATE TABLE user
(
	id VARCHAR(32) NOT NULL COMMENT '主键ID',
	name VARCHAR(30) NULL DEFAULT NULL COMMENT '姓名',
	age INT(11) NULL DEFAULT NULL COMMENT '年龄',
	email VARCHAR(50) NULL DEFAULT NULL COMMENT '邮箱',
	PRIMARY KEY (id)
);


INSERT INTO user (id, name, age, email) VALUES
(1, 'Jone', 18, '[email protected]'),
(2, 'Jack', 20, '[email protected]'),
(3, 'Tom', 28, '[email protected]'),
(4, 'Sandy', 21, '[email protected]'),
(5, 'Billie', 24, '[email protected]');

二、引入项目依赖,加入配置,修改启动类,编写实体类和mapper对象(读者可以根据自动生成工具生成这块代码)

1.引入依赖

pom.xml



  4.0.0
  
    org.springframework.boot
    spring-boot-starter-parent
    2.1.4.RELEASE
     
  
  com.example
  mybatisplus-springboot
  0.0.1-SNAPSHOT
  mybatisplus-springboot
  Demo project for Spring Boot

  
    1.8
    6.0.6
    3.1.0
    1.1.10
    2.5.4
  

  
    
      org.springframework.boot
      spring-boot-starter-web
    

    
      org.projectlombok
      lombok
      true
    

    
      mysql
      mysql-connector-java
      ${mysql.version}
    

    
      com.baomidou
      mybatis-plus-boot-starter
      ${mybatisplus.boot.version}
    

    
      org.projectlombok
      lombok
      true
    

    
      com.alibaba
      druid-spring-boot-starter
      ${druid.version}
    

    
      com.baomidou
      dynamic-datasource-spring-boot-starter
      ${dynamic.datasource.boot.version}
    

    
      org.springframework.boot
      spring-boot-starter-test
      test
    
  


  
    
      
        org.springframework.boot
        spring-boot-maven-plugin
      
    
  


2.编写配置

application.yml

spring:
 autoconfigure:
  exclude: com.alibaba.druid.spring.boot.autoconfigure.DruidDataSourceAutoConfigure # 为了某些版本的springboot @SpringBootApplication(exclude= {DataSourceAutoConfiguration.class}) 无法生效
 datasource:
  dynamic:
   primary: master #设置默认的数据源或者数据源组,默认值即为master,如果读者只是单数据源只需要注释掉slave相关配置即可,这里为了方便演示master与slave保持相同
   datasource:
    master:
     url: jdbc:mysql://localhost:3306/test?serverTimezone=Hongkong&allowMultiQueries=true&useUnicode=true&characterEncoding=UTF-8&autoReconnect=true&useSSL=false # serverTimezone=Hongkong 需要填上时区
     username: root
     password: 111111
     driverClassName: com.mysql.cj.jdbc.Driver
    slave:
     url: jdbc:mysql://localhost:3306/test?serverTimezone=Hongkong&allowMultiQueries=true&useUnicode=true&characterEncoding=UTF-8&autoReconnect=true&useSSL=false # serverTimezone=Hongkong 需要填上时区
     username: root
     password: 111111
     driverClassName: com.mysql.cj.jdbc.Driver
   initial-size: 10 # 以下是连接池配置
   max-active: 100
   min-idle: 10
   max-wait: 60000
   pool-prepared-statements: true
   max-pool-prepared-statement-per-connection-size: 20
   time-between-eviction-runs-millis: 60000
   min-evictable-idle-time-millis: 300000
   #validation-query: SELECT 1
   test-while-idle: true
   test-on-borrow: false
   test-on-return: false
   stat-view-servlet:
    enabled: true
    url-pattern: /druid/*
    login-username: druid
    login-password: 123456
   filter:
    stat:
     log-slow-sql: true
     slow-sql-millis: 1000
     merge-sql: false
    wall:
     config:
      multi-statement-allow: true



#mybatis plus
mybatis-plus:
 mapper-locations: classpath:mapper/**/*.xml
 #实体扫描,多个package用逗号或者分号分隔
 typeAliasesPackage: com.example.mybatisplus.entity
 check-config-location: true
 configuration:
  #是否开启自动驼峰命名规则(camel case)映射
  map-underscore-to-camel-case: true
  #全局地开启或关闭配置文件中的所有映射器已经配置的任何缓存
  cache-enabled: false
  call-setters-on-nulls: true
  #配置JdbcTypeForNull, oracle数据库必须配置
  jdbc-type-for-null: 'null'
  #MyBatis 自动映射时未知列或未知属性处理策略 NONE:不做任何处理 (默认值), WARNING:以日志的形式打印相关警告信息, FAILING:当作映射失败处理,并抛出异常和详细信息
  auto-mapping-unknown-column-behavior: warning
 global-config:
  banner: false
  db-config:
   #主键类型 0:"数据库ID自增", 1:"未设置主键类型",2:"用户输入ID (该类型可以通过自己注册自动填充插件进行填充)", 3:"全局唯一ID (idWorker), 4:全局唯一ID (UUID), 5:字符串全局唯一ID (idWorker 的字符串表示)";
   id-type: UUID
   #字段验证策略 IGNORED:"忽略判断", NOT_NULL:"非NULL判断", NOT_EMPTY:"非空判断", DEFAULT 默认的,一般只用于注解里(1. 在全局里代表 NOT_NULL,2. 在注解里代表 跟随全局)
   field-strategy: NOT_EMPTY
   #数据库大写下划线转换
   capital-mode: true
   #逻辑删除值
   logic-delete-value: 0
   #逻辑未删除值
   logic-not-delete-value: 1

server:
 port: 7000

3.修改启动类

MybatisplusSpringbootApplication.java

import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration;

@SpringBootApplication(exclude= {DataSourceAutoConfiguration.class}) //去掉springboot 默认的数据源配置
@MapperScan("com.example.mybatisplus.mapper") //扫描mapper的包,或者读者可以在对应的mapper上加上@Mapper的注解
public class MybatisplusSpringbootApplication {

  public static void main(String[] args) {
    SpringApplication.run(MybatisplusSpringbootApplication.class, args);
  }
}

4.编写实体

4.1 user.java

import lombok.Data;
/**
 * user 实体类
 */
@Data
public class User {
  private String id;
  private String name;
  private Integer age;
  private String email;
}

注:读者请自行在开发工具安装lombok插件,或者去掉@data注解换成setter getter方法即可

4.2 UserMapper.java

import com.baomidou.dynamic.datasource.annotation.DS;
import com.baomidou.mybatisplus.core.mapper.BaseMapper;
import com.example.mybatisplus.entity.User;

/**
 * 用户mapper
 */
@DS("slave") //这里是配置数据源注解,默认是master
public interface UserMapper extends BaseMapper {
}

三、编写测试用例

import com.example.mybatisplus.entity.User;
import com.example.mybatisplus.mapper.UserMapper;
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;

import java.util.List;

/**
 * 简单的测试增删改查
 */
@RunWith(SpringRunner.class)
@SpringBootTest
public class MybatisplusSpringbootApplicationTests {


  @Autowired
  private UserMapper userMapper;

  @Test
  public void addUser() {
    User user = new User();
    user.setAge(200);
    user.setEmail("[email protected]");
    user.setName("belongHuang");
    userMapper.insert(user);
  }

  @Test
  public void updateUser() {
    User user = userMapper.selectById(1);
    user.setAge(300);
    int i = userMapper.updateById(user);
    if (i>0) {
      System.out.println("修改成功");
    }else {
      System.out.println("修改失败");
    }
  }

  @Test
  public void deleteUser() {
    int i = userMapper.deleteById(1);
    if (i>0) {
      System.out.println("删除成功");
    }else {
      System.out.println("删除失败");
    }
  }
  @Test
  public void selectUser() {
    List users = userMapper.selectList(null);
    users.stream().map(User::getName).forEach(System.out::println);//打印出所用用户名字
  }
}

本文侧重点于集成,更多功能移步至官网。

到此这篇关于springboot集成mybatisPlus+多数据源的实现示例的文章就介绍到这了,更多相关springboot mybatisPlus多数据源内容请搜索脚本之家以前的文章或继续浏览下面的相关文章希望大家以后多多支持脚本之家!

你可能感兴趣的:(springboot集成mybatisPlus+多数据源的实现示例)