MybatisPlus快速使用

配置类(非必须)

如果不涉及分页，无需配置

https://baomidou.com/pages/2976a3/#spring-boot

从上面网址粘贴下来 代码即可

package com.atguigu.ssyx.common.config;

import com.baomidou.mybatisplus.annotation.DbType;
import com.baomidou.mybatisplus.autoconfigure.ConfigurationCustomizer;
import com.baomidou.mybatisplus.extension.plugins.MybatisPlusInterceptor;
import com.baomidou.mybatisplus.extension.plugins.inner.PaginationInnerInterceptor;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

/**
 * @author shen
 * @date 2023/7/23
 * @description : MybatisPlus分页插件配置
 * @version: v1.0
 **/
@Configuration
@MapperScan("com.atguigu.ssyx.*.mapper")
public class MybatisPlusConfig {

    /**
     * 新的分页插件,一缓和二缓遵循mybatis的规则,需要设置 MybatisConfiguration#useDeprecatedExecutor = false 避免缓存出现问题(该属性会在旧插件移除后一同移除)
     */
    @Bean
    public MybatisPlusInterceptor mybatisPlusInterceptor() {
        MybatisPlusInterceptor interceptor = new MybatisPlusInterceptor();
        // DbType.MYSQL 连接的数据库
        interceptor.addInnerInterceptor(new PaginationInnerInterceptor(DbType.MYSQL));
        return interceptor;
    }

    @Bean
    public ConfigurationCustomizer configurationCustomizer() {
        return configuration -> configuration.setUseDeprecatedExecutor(false);
    }
}

Entity

package com.atguigu.ssyx.model.acl;

import com.atguigu.ssyx.model.base.BaseEntity;
import com.baomidou.mybatisplus.annotation.TableField;
import com.baomidou.mybatisplus.annotation.TableName;
import io.swagger.annotations.ApiModel;
import io.swagger.annotations.ApiModelProperty;
import lombok.Data;

/**
 * 用户表
 */
@Data // 通过lombok自动生成 setter,getter, toString等方法
@ApiModel(description = "用户") // swagger2表注释
@TableName("admin") // 对应数据库表名
public class Admin extends BaseEntity {

   private static final long serialVersionUID = 1L;

   @ApiModelProperty(value = "用户名")
   @TableField("username")
   private String username;

   @ApiModelProperty(value = "密码")
   @TableField("password")
   private String password;

   @ApiModelProperty(value = "昵称")
   @TableField("name")
   private String name;

   @ApiModelProperty(value = "手机")
   @TableField("phone")
   private String phone;

   @ApiModelProperty(value = "仓库id") // swagger2字段注释
   @TableField("ware_id") // 对应数据库字段名
   private Long wareId;

   @ApiModelProperty(value = "角色名称")
   @TableField(exist = false) // 表示该属性可以在表中不存在
   private String roleName;
}

Mapper

package com.atguigu.ssyx.acl.mapper;

import com.atguigu.ssyx.model.acl.Admin;
import com.baomidou.mybatisplus.core.mapper.BaseMapper;
import org.springframework.stereotype.Repository;

/**
 * @author shen
 * @date 2023/7/29
 * @description :
 * @version: v1.0
 **/
@Repository
public interface AdminMapper extends BaseMapper {
}

Service

package com.atguigu.ssyx.acl.service;

import com.atguigu.ssyx.model.acl.Admin;
import com.atguigu.ssyx.model.acl.Role;
import com.atguigu.ssyx.vo.acl.AdminQueryVo;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.baomidou.mybatisplus.extension.service.IService;

/**
 * @author shen
 * @date 2023/7/29
 * @description :
 * @version: v1.0
 **/
public interface AdminService extends IService {
    IPage selectPage(Page pageParam, AdminQueryVo adminQueryVo);
}

ServiceImpl

package com.atguigu.ssyx.acl.service.impl;

import com.atguigu.ssyx.acl.mapper.AdminMapper;
import com.atguigu.ssyx.acl.service.AdminService;
import com.atguigu.ssyx.model.acl.Admin;
import com.atguigu.ssyx.model.acl.Role;
import com.atguigu.ssyx.vo.acl.AdminQueryVo;
import com.atguigu.ssyx.vo.user.UserQueryVo;
import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Service;
import org.springframework.util.StringUtils;

/**
 * @author shen
 * @date 2023/7/29
 * @description :
 * @version: v1.0
 **/
@Service
@Slf4j
public class AdminServiceImpl extends ServiceImpl implements AdminService {

    // 要使用 AdminService 操作数据库,有两种
    // 1.注入service
    @Autowired
    private AdminService adminService;
    // 2.使用baseMapper
    // baseMapper 等价于 adminService,只是方法不太相同
    // baseMapper.selectList();
    // 3.使用 adminMapper
    // 与上面两个等价
    @Autowired
    private AdminMapper adminMapper;

    @Override
    public IPage selectPage(Page pageParam, AdminQueryVo adminQueryVo) {
        String username = adminQueryVo.getUsername();
        String name = adminQueryVo.getName();
        LambdaQueryWrapper queryWrapper = new LambdaQueryWrapper<>();
        if(!StringUtils.isEmpty(name)){
            log.info("username : " + name);
            queryWrapper.like(Admin::getUsername, name);
        }else if(!StringUtils.isEmpty(username)){
            log.info("name : " + username);
            queryWrapper.like(Admin::getName, username);
        }
        Page datas = baseMapper.selectPage(pageParam, queryWrapper);
        // 等价于
        // Page datas = adminService.page(pageParam,queryWrapper);
        return datas;
    }
    
}

Controller

package com.atguigu.ssyx.acl.controller;

import com.atguigu.ssyx.acl.service.AdminRoleService;
import com.atguigu.ssyx.acl.service.AdminService;
import com.atguigu.ssyx.acl.service.RoleService;
import com.atguigu.ssyx.common.result.Result;
import com.atguigu.ssyx.model.acl.Admin;
import com.atguigu.ssyx.model.acl.AdminRole;
import com.atguigu.ssyx.model.acl.Role;
import com.atguigu.ssyx.vo.acl.AdminQueryVo;
import com.atguigu.ssyx.vo.acl.RoleQueryVo;
import com.atguigu.ssyx.vo.user.UserQueryVo;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import io.swagger.annotations.ApiParam;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.util.StringUtils;
import org.springframework.web.bind.annotation.*;

import javax.annotation.Resource;
import java.util.List;
import java.util.Map;

/**
 * @author shen
 * @date 2023/7/29
 * @description :
 * @version: v1.0
 **/
@RestController
@Api(tags = "用户管理")
@CrossOrigin // 跨域，解决前后端工程访问协议，ip，端口号不一致问题
@Slf4j
@RequestMapping("/admin/acl/user")
public class AdminController {

    @Resource
    private AdminService adminService;

    @ApiOperation(value = "获取用户分页列表")
    @GetMapping("{page}/{limit}")
    public Result index(
            @ApiParam(name = "page", value = "当前页码", required = true)
            @PathVariable Long page,
    
            @ApiParam(name = "limit", value = "每页记录数", required = true)
            @PathVariable Long limit,
    
            @ApiParam(name = "adminQueryVo", value = "查询对象", required = false)
            AdminQueryVo adminQueryVo) {
        Page pageParam = new Page<>(page, limit);
        IPage pageModel = adminService.selectPage(pageParam, adminQueryVo);
        return Result.ok(pageModel);
    }
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