SpringBoot集成mybatis-plus

create database `mybatis_plus_example` character set utf8mb4 collate utf8mb4_general_ci;

create user 'test'  identified by 'xxx_xxx2020';
grant all on `mybatis_plus_example`.* to test@'%';

CREATE TABLE `user` (
    `id`      int(11) UNSIGNED NOT NULL AUTO_INCREMENT,
    `name`    varchar(32)      NOT NULL COMMENT '用户名',
    `phone`   varchar(32)      NOT NULL DEFAULT '' COMMENT '手机号',
    `city`    varchar(32)      NOT NULL COMMENT '城市',
    `created` datetime                  DEFAULT CURRENT_TIMESTAMP COMMENT '创建时间',
    `updated` datetime                  DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP COMMENT '更新时间',
    PRIMARY KEY (`id`),
    UNIQUE INDEX `uidx_phone` (`phone`)
) COMMENT ='用户信息' AUTO_INCREMENT = 1000000;

CREATE TABLE `user_extension` (
    `id`           int(11) UNSIGNED NOT NULL COMMENT '用户id, user.id',
    `email`        varchar(32)      NOT NULL DEFAULT '' COMMENT '邮箱',
    `introduction` varchar(512)     NOT NULL DEFAULT '' COMMENT '用户简介',
    `eng_name`     varchar(32)      NOT NULL COMMENT '英文名称',
    `created`      datetime                  DEFAULT CURRENT_TIMESTAMP COMMENT '创建时间',
    `updated`      datetime                  DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP COMMENT '更新时间',
    PRIMARY KEY (`id`)
) COMMENT ='用户扩展信息';

package me.gaopq.demo.mbp.example.config;

import com.baomidou.mybatisplus.annotation.DbType;
import com.baomidou.mybatisplus.extension.plugins.PaginationInterceptor;
import com.baomidou.mybatisplus.extension.plugins.pagination.optimize.JsqlParserCountOptimize;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.transaction.annotation.EnableTransactionManagement;

/**
 * @author gaopq
 * @date 2020/4/17 17:35
 */
@Configuration
@EnableTransactionManagement
@MapperScan("me.gaopq.demo.mbp.example.mapper")
public class MybatisPlusConfig {

    @Bean
    public PaginationInterceptor paginationInterceptor() {

        PaginationInterceptor paginationInterceptor = new PaginationInterceptor();
        // 设置请求的页面大于最大页后操作， true调回到首页，false 继续请求  默认false
        // paginationInterceptor.setOverflow(false);
        // 设置最大单页限制数量，默认 500 条，-1 不受限制
        paginationInterceptor.setLimit(500);
        paginationInterceptor.setDbType(DbType.MYSQL);
        // 开启 count 的 join 优化,只针对部分 left join
        paginationInterceptor.setCountSqlParser(new JsqlParserCountOptimize(true));

        return paginationInterceptor;
    }
}

package me.gaopq.demo.mbp.example.entity;

import com.baomidou.mybatisplus.annotation.IdType;
import com.baomidou.mybatisplus.annotation.TableField;
import com.baomidou.mybatisplus.annotation.TableId;
import com.baomidou.mybatisplus.annotation.TableName;
import io.swagger.annotations.ApiModel;
import io.swagger.annotations.ApiModelProperty;
import lombok.Data;

import java.io.Serializable;
import java.util.Date;

/**
 * @author gaopq
 * @date 2020/4/17 18:22
 */
@Data
@ApiModel("用户信息")
@TableName(value = "user")
public class User implements Serializable {

    @ApiModelProperty("用户id, 单表自增")
    @TableId(type = IdType.AUTO)
    private Integer id;

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

    @ApiModelProperty("手机号")
    private String phone;

    @ApiModelProperty("城市")
    private String city;

    @ApiModelProperty("创建记录时间")
    private Date created;

    @ApiModelProperty("更新记录时间")
    private Date updated;
}

package me.gaopq.demo.mbp.example.mapper;

import com.baomidou.mybatisplus.core.mapper.BaseMapper;
import me.gaopq.demo.mbp.example.entity.User;

/**
 * @author gaopq
 * @date 2020/4/17 18:28
 */
public interface UserMapper extends BaseMapper<User> {
}