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SpringBoot 2.7.18 集成 Mybatis Plus + Druid的实例详解

开发 作者： VipSoft
目录
  • Pom 依赖
  • yml 配置
  • Config 配置
  • Mapper扫描
  • Entity
  • Mapper.XML
  • Mapper - SysMenuMapper
  • Service
  • Controller

一并附上 MyBATis 和 Mybatis Plus 的使用区别

MyBatis Mapper.XML 标签使用说明

Pom 依赖

Mybatis

<!-- 统一管理 jar 包版本 -->
<properties>
    <druid-boot.version>1.1.10</druid-boot.version>
    <mybatis-boot.version>2.1.0</mybatis-boot.version>
    <mysql-connector.version>8.0.16</mysql-connector.version>
    <mssql-jdbc.version>8.2.2.jre8</mssql-jdbc.version>
    <oracle-jdbc.version>19.3.0.0</oracle-jdbc.version>
    <pagehelper-starter.version>1.2.10</pagehelper-starter.version>
</properties>
<!--子模块继承之后，锁定版本+子模块不用写 groupid 和 version -->
<dependencyManagement>
    <dependencies>
        <!-- mybatis + druid + mysql + mssql-->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid-spring-boot-starter</artifactId>
            <version>${druid-boot.version}</version>
        </dependency>
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>${mybatis-boot.version}</version>
        </dependency>
        <dependency>
            <groupId>com.github.pagehelper</groupId>
            <artifactId>pagehelper-spring-boot-starter</artifactId>
            <version>${pagehelper-starter.version}</version>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-Java</artifactId>
            <version>${mysql-connector.version}</version>
        </dependency>
        <dependency>
            <groupId>com.microsoft.sqlserver</groupId>
            <artifactId>mssql-jdbc</artifactId>
            <version>${mssql-jdbc.version}</version>
        </dependency>
        <dependency>
            <groupId>com.oracle.database.jdbc</groupId>
            <artifactId>ojdbc8</artifactId>
            <version>${oracle-jdbc.version}</version>
        </dependency>
        <!-- mybatis + druid + mysql + mssql-->
    </dependencies>
</dependencyManagement>

Mybatis Plus

使用框架自带的分布控件，如果使用 pagehelper 会报 jsqlParser 的版本冲突，根据情况排除 pagehelper 版本（不推荐）。

<!-- 统一管理 jar 包版本 -->
<properties>
    <druid-boot.version>1.2.23</druid-boot.version>
    <mybatis-plus.version>3.5.7</mybatis-plus.version>
    <mysql-connector.version>8.0.33</mysql-connector.version>
    <mssql-jdbc.version>8.2.2.jre8</mssql-jdbc.version>
    <oracle-jdbc.version>19.3.0.0</oracle-jdbc.version>
</properties>
<!--子模块继承之后，锁定版本+子模块不用写 groupid 和 version -->
<dependencyManagement>
    <dependencies>
        <!-- mybatis plus + druid + mysql + mssql-->
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-boot-starter</artifactId>
            <version>${mybatis-plus.version}</version>
        </dependency>
        <!--分页-->
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-extension</artifactId>
            <version>${mybatis-plus.version}</version>
        </dependency>
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-annotation</artifactId>
            <version>${mybatis-plus.version}</version>
        </dependency>
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid-spring-boot-starter</artifactId>
            <version>${druid-boot.version}</version>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-j</artifactId>
            <version>${mysql-connector.version}</version>
        </dependency>
        <dependency>
            <groupId>com.microsoft.sqlserver</groupId>
            <artifactId>mssql-jdbc</artifactId>
            <version>${mssql-jdbc.version}</version>
        </dependency>
        <dependency>
            <groupId>com.oracle.database.jdbc</groupId>
            <artifactId>ojdbc8</artifactId>
            <version>${oracle-jdbc.version}</version>
        </dependency>
        <!-- mybatis plus + druid + mysql + mssql-->
    </dependencies>
</dependencyManagement>

yml 配置

Mybatis

mybatis:
  # 指定sql映射文件位置
  mapper-locations: classpath*:mapper/*.xml
  configuration:
    map-underscore-to-camel-case: true
    log-impl: org.apache.ibatis.logging.stdout.StdOutImpl
  type-handlers-package: com.vipsoft.base.handler # MySQL 8.0  用以mysql中json格式的字段，进行转换的自定义转换器，转换为实体类的JSONObject属性

Mybatis-Plus

mybatis-plus:
  mapper-locations: classpath*:mappjser/*Mapper.xml
  global-config:
    banner: true
    db-config:
      id-type: auto
      where-strategy: not_empty
      insert-strategy: not_empty
      update-strategy: not_null
  type-handlers-package: com.vipsoft.base.handler # MySQL 8.0  用以mysql中json格式的字段，进行转换的自定义转换器，转换为实体类的JSONObject属性
  configuration:
    log-impl: org.apache.ibatis.logging.stdout.StdOutImpl
    map-underscore-to-camel-case: true
    jdbc-type-for-null: 'null'
    call-setters-on-nulls: true
    shrink-whitespaces-in-sql: true

druid

SpringBoot 配置多数据源

spring:
  profiles:
    active: dev
  resources:
    static-locations: classpath:/META-INF/resources/,classpath:/resources/,classpath:/static/,classpath:/public/,classpath:/web/,file:${cuwor.file.path}
  datasource:
    type: com.alibaba.druid.pool.DruidDataSource
    driver-class-name: com.mysql.cj.jdbc编程客栈.Driver
    #数据源基本配置
    url: jdbc:mysql://192.168.1.100:3306/production_education?serverTimezone=Asia/Shanghai&useUnicode=true&characterEncoding=utf8&zeroDateTimeBehavior=CONVERT_TO_NULL
    username: root
    password: root
    #连接池的设置
    druid:
      initial-size: 5 #初始化时建立物理连接的个数
      min-idle: 5  #最小连接池数量
      max-active: 200  #最大连接池数量 maxIdle已经不再使用
      max-wait: 60000 #获取连接时最大等待时间，单位毫秒
      test-while-idle: true #申请连接的时候检测，如果空闲时间大于timeBetweenEvictionRunsMillis，执行validationQuery检测连接是否有效。
      time-between-eviction-runs-millis: 60000 #既作为检测的间隔时间又作为testWhileIdel执行的依据
      #销毁线程时检测当前连接的最后活动时间和当前时间差大于该值时，关闭当前连接
      min-evictable-idle-time-millis: 30000
      validation-query: select 'x' #用来检测连接是否有效的sql 必须是一个查询语句（ mysql中为 select 'x'  oracle中为 select 1 from dual）
      test-on-borrow: false #申请连接时会执行validationQuery检测连接是否有效,开启会降低性能,默认为true
      test-on-return: false  #归还连接时会执行validationQuery检测连接是否有效,开启会降低性能,默认为true
      #exception-sorter: true #当数据库抛出不可恢复的异常时,抛弃该连接
      #pool-prepared-statements: true  #是否缓存preparedStatement,mysql5.5+建议开启
      max-pool-prepared-statement-per-connection-size: 20  #当值大于0时poolPreparedStatements会自动修改为true
      filters: stat,wall #配置扩展插件
      connection-properties: druid.stat.mergeSql=true;druid.stat.slowSqlMillis=500 #通过connectProperties属性来打开mergeSql功能；慢SQL记录
      use-global-data-source-stat: true #合并多个DruidDataSource的监控数据
      #设置访问druid监控页的账号和密码,默认没有--放DrugConfig配置中
      #stat-view-servlet.login-username: admin
      #stat-view-servlet.login-password: admin

Config 配置

Druid 配置没有变化

package com.vipsoft.base.config;
import com.alibaba.druid.pool.DruidDataSource;
import com.alibaba.druid.support.http.StatViewServlet;
import com.alibaba.druid.support.http.WebStatFilter;
import org.springframework.boot.context.properties.ConfigurationProperties;
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 javax.sql.DataSource;
import java.util.Arrays;
import java.util.HashMap;
import java.util.Map;
@Configuration
public class DruidConfig {
    @ConfigurationProperties(prefix = "spring.datasource")
    @Bean
    public DataSource druid(){
        return  new DruidDataSource();
    }
    //配置Druid的监控
    //1、配置一个管理后台的Servlet
    @Bean
    public ServletRegistrationBean statViewServlet(){
        ServletRegistrationBean bean = new ServletRegistrationBean(new StatViewServlet(), "/druid/*");
        Map<String,String> initParams = new HashMap<>();
        initParams.put("loginUsername","admin");
        initParams.put("loginPassword","vipsoft");
        initParams.put("resetEnable","false");
        initParams.put("allow","");//默认就是允许所有访问
        initParams.put("deny","192.168.15.21"); //IP黑名单（同时存在时，deny优先于allow）
        bean.setInitParameters(initParams);
        return bean;
    }
    //2、配置一个web监控的filter
    @Bean
    public FilterRegistrationBean webStatFilter(){
        FilterRegistrationBean bean = new FilterRegistrationBean();
        bean.setFilter(new WebStatFilter());
        Map<String,String> initParams = new HashMap<>();
        initParams.put("exclusions","*.js,*.css,/druid/*");
        bean.setInitParameters(initParams);
        bean.setUrlPatterns(Arrays.asList("/*"));
        return  bean;
    }
}

Mybatis Plus 分页，需要添加 拦截器配置，否则分页不生效

package com.vipsoft.base.config;
import com.baomidou.mybatisplus.extension.plugins.MybatisPlusInterceptor;
import com.baomidou.mybatisplus.extension.plugins.inner.PaginationInnerInterceptor;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
@Configuration
public class MybatisPlusConfig {
    /**
     * 分页插件 --iDqvkEtlnR 否则分页不生效
     * @return
     */
    @Bean
    public MybatisPlusInterceptor mybatisPlusInterceptor() {
        MybatisPlusInterceptor interceptor = new MybatisPlusInterceptor();
        interceptor.addInnerInterceptor(new PaginationInnerInterceptor());
        return interceptor;
    }
}

SpringBoot 2.7.18 集成 Mybatis Plus + Druid的实例详解

Mapper扫描

@MapperScan({"com.vipsoft.admin.mapper"}) 和 Mybatis 无区别

package com.vipsoft.admin;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication; 
import org.springframework.context.annotation.ComponentScan;
@ComponentScan(basePackages = {"com.vipsoft"})
@SpringBootApplication
@MapperScan({"com.vipsoft.admin.mapper"})
public class VipSoftAdminApplication {
    public static void main(String[] args) {
        SpringApplication.run(VipSoftAdminApplication.class, args);
    }
}

Entity

SysMenu

//@TableName("sys_menu") 默认会将 SysMenu 解析成 sys_menu 如果解析后不是正确的表名，需要通过 TableName进行指定，
public class SysMenu extends BaseEntity
{
    private static final long serialVersionUID = 1L;
    /** 菜单ID */
	@TableId(value = "menu_id", type = IdType.ASSIGN_ID)
    private Long menuId;
    /** 菜单名称 */
	@TableField(value = "menu_name")
    private String menuName;
    /** 父菜单名称 */
    @TableField(exist = false)  //非数据库字段，进行排除
    private String parentName;
	....省略
}

Mapper.xml

SysMenuMapper.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.vipsoft.admin.mapper.SysMenuMapper">
    <resultMap type="com.vipsoft.admin.entity.SysMenu" id="SysMenuResult">
        <id property="menuId" column="menu_id"/>
        <result property="menuName" column="menu_name"/>
        <result property="parentName" column="parent_name"/>
        <result property="parentId" column="parent_id"/>
        <result property="orderNum" column="order_num"/>
        <result property="path" column="path"/> 
        <result property="createTime" column="create_time"/>
        <result property="updateTime" column="update_time"/> 
    </resultMap>
    <select id="listMenu" parameterType="com.vipsoft.admin.entity.SysMenu" resultMap="SysMenuResult">
        select menu_id, menu_name, parent_id, order_num, create_time from sys_menu
        <where>
            <if test="menuName != null and menuName != ''">
                AND menu_name like concat('%', #{menuName}, '%')
            </if>
            <if test="visible != null and visible != ''">
                AND visible = #{visible}
            </if>
            <if test="status != null and status != ''">
                AND status = #{status}
            </if>
        </where>
        order by parent_id, order_num
    </select>
    <select id="listMenuPage" resultMap="SysMenuResult">
        select menu_id, menu_name, parent_id, order_num, create_time from sys_menu
        <where>
            <if test="query.menuName != null and query.menuName != ''">
                AND menu_name like concat('%', #{query.menuName}, '%')
            </if>
            <if test="query.visible != null and query.visible != ''">
                AND visible = #{query.visible}
            </if>
            <if test="query.status != null and query.status != ''">
                AND status = #{query.status}
            </if>
        </where>
        order by parent_id, order_num
    </select>
</mapper>

SpringBoot 2.7.18 集成 Mybatis Plus + Druid的实例详解

Mapper - SysMenuMapper

需要继承 BaseMapper

pacjavascriptkage com.vipsoft.admin.mapper;
import com.baomidou.mybatisplus.core.mapper.BaseMapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.vipsoft.admin.entity.SysMenu;
import org.apache.ibatis.annotations.Param;
import java.util.List;
/**
 * 菜单表 数据层
 */
public interface SysMenuMapper extends BaseMapper<SysMenu> {
    List<SysMenu> listMenu(SysMenu menu);
    IPage<SysMenu> listMenuPage(Page page, @Param("query") SysMenu menu);
}

Service

ISysMenuService

package com.vipsoft.admin.service;
import com.baomidou.mybatisplus.core.metadata.IPage; 
import com.vipsoft.admin.entity.SysMenu; 
import java.util.List; 
/**
 * 菜单 业务层
 *
 */
public interface ISysMenuService
{
    /**
     * 列表查询(自定义SQL，分页)
     */
    List<SysMenu> listMenu(SysMenu menu);
    /**
     * 列表查询（框架分页）
     */
    IPage  selectPage(SysMenu menu);
    /**
     * 列表查询（自定义SQL，分页）
     */
    IPage listMenuPage(SysMenu menu);
}

SysMenuService

package com.vipsoft.admin.service.impl;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.core.metadata.OrderItem;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.vipsoft.admin.entity.SysMenu;
import com.vipsoft.admin.mapper.SysMenuMapper;
import com.vipsoft.admin.service.ISysMenuService;
import com.github.pagehelper.PageHelper;
import com.github.pagehelper.PageInfo;
import com.github.pagehelper.PageParam;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.util.*;
import java.util.stream.Collectors;
/**
 * 菜单 业务层处理
 *
 * @author ruoyi
 */
@Service
public class SysMenuServiceImpl implements ISysMenuService { 
    @pythonAutowired
    private SysMenuMapper menuMapper;
    /**
     * 列表查询(自定义SQL，分页)
     */
    @Override
    public List<SysMenu> listMenu(SysMenu menu) {
        return menuMapper.listMenu(new SysMenu());
    }
    /**
     * 列表查询（框架分页）
     */
    @Override
    public IPage selectPage(SysMenu menu) {
        Page page = new Page();
        page.setCurrent(2);
        page.setSize(10);
        List<OrderItem> orderItems = new ArrayList<>();
        orderItems.add(OrderItem.desc("menu_id"));
        page.setOrders(orderItems);
        Page pageList = menuMapper.selectPage(page, null);
        return pageList;
    }
    /**
     * 列表查询（自定义SQL，分页）
     */
    @Override
    public IPage listMenuPage(SysMenu menu) {
        Page page = new Page();
        page.setCurrent(2);
        page.setSize(10);
        List<OrderItem> orderItems = new ArrayList<>();
        orderItems.add(OrderItem.desc("menu_id")); //先按 menu_id 排序，再按 mapper.xml 中的排（可以在查询输出的SQL中查看）
        page.setOrders(orderItems);
        IPage<SysMenu> pageList = menuMapper.listMenuPage(page, menu);
        return pageList;
    }
}

Controller

package com.vipsoft.admin.controller;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.vipsoft.admin.entity.SysMenu;
import com.vipsoft.admin.service.ISysMenuService;
import com.vipsoft.base.core.ApiResult;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import java.util.List;
/**
 * 菜单信息
 */
@RestController
@RequestMapping("/menu")
public class SysMenuController {
    @Autowired
    private ISysMenuService menuService;
    /**
     * 获取菜单列表
     */
    @GetMapping("/selectPage")
    public ApiResult selectPage(SysMenu menu) {
        IPage menus = menuService.selectPage(menu);
        return new ApiResult(menus);
    }
    /**
     * 获取菜单列表
     */
    @GetMapping("/list")
    public ApiResult listMenu(SysMenu menu) {
        List<SysMenu> menus = menuService.listMenu(menu);
        return new ApiResult(menus);
    }
    /**
     * 获取菜单列表
     */
    @GetMapping("/listMenuPage")
    public ApiResult listMenuPage(SysMenu menu) {
        IPage menus = menuService.listMenuPage(menu);
        return new ApiResult(menus);
    }
}

到此这篇关于SpringBoot 2.7.18 集成 Mybatis Plus + Druid的文章就介绍到这了,更多相关SpringBoot 2.7.18 集成 Mybatis Plus + Druid内容请搜索编程客栈(www.devze.com)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编程客栈(www.devze.com)！

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