这篇文章将为大家详细讲解有关MyBatisPlus如何实现分页时排序，小编觉得挺实用的，因此分享给大家做个参考，希望大家阅读完这篇文章后可以有所收获。
简介
说明
本文用示例介绍MyBtisPlus分页时排序的方法。
分页时排序的方法
后端OrderItems排序
后端Wrapper排序
前端指定排序
排序涉及到的类
排序涉及到Page类的List<OrderItem> orders;成员，OrderItem定义如下：
public class OrderItem implements Serializable { private static final long serialVersionUID = 1L; //需要进行排序的字段 private String column; // 是否正序排列，默认 true private boolean asc = true; ...}建库建表
DROP DATABASE IF EXISTS mp;CREATE DATABASE mp DEFAULT CHARACTER SET utf8;USE mp; DROP TABLE IF EXISTS `t_user`;SET NAMES utf8mb4; CREATE TABLE `t_user`( `id` BIGINT(0) NOT NULL AUTO_INCREMENT, `user_name` VARCHAR(64) NOT NULL COMMENT '用户名（不能重复）', `nick_name` VARCHAR(64) NULL COMMENT '昵称（可以重复）', `email` VARCHAR(64) COMMENT '邮箱', `create_time` DATETIME(0) NULL DEFAULT CURRENT_TIMESTAMP COMMENT '创建时间', `update_time` DATETIME(0) NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP COMMENT '修改时间', `deleted_flag` BIGINT(0) NOT NULL DEFAULT 0 COMMENT '0：未删除 其他：已删除', PRIMARY KEY (`id`) USING BTREE, UNIQUE KEY `index_user_name_deleted_flag` (`user_name`, `deleted_flag`), KEY `index_create_time`(`create_time`)) ENGINE = InnoDB COMMENT = '用户'; INSERT INTO `t_user` VALUES (1, 'knife', '刀刃', 'abc@qq.com', '2021-01-23 09:33:36', '2021-01-23 09:33:36', 0);INSERT INTO `t_user` VALUES (2, 'sky', '天蓝', '123@qq.com', '2021-01-24 18:12:21', '2021-01-24 18:12:21', 0);执行后的结果：
依赖
pom.xml
<?xml version="1.0" encoding="UTF-8"?><project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.3.12.RELEASE</version> <relativePath/> <!-- lookup parent from repository --> </parent> <groupId>com.example</groupId> <artifactId>MyBatis-Plus_Simple</artifactId> <version>0.0.1-SNAPSHOT</version> <name>MyBatis-Plus_Simple</name> <description>Demo project for Spring Boot</description> <properties> <java.version>1.8</java.version> </properties> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>com.baomidou</groupId> <artifactId>mybatis-plus-boot-starter</artifactId> <version>3.5.1</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> </dependency> <dependency> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> </dependency> <dependency> <groupId>com.github.xiaoymin</groupId> <artifactId>knife4j-spring-boot-starter</artifactId> <version>3.0.3</version> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build> </project>配置
application.yml
spring: datasource: driver-class-name: com.mysql.cj.jdbc.Driver url: jdbc:mysql://127.0.0.1:3306/mp?characterEncoding=UTF-8&serverTimezone=Asia/Shanghai username: root password: 222333 #mybatis-plus配置控制台打印完整带参数SQL语句mybatis-plus: configuration: log-impl: org.apache.ibatis.logging.stdout.StdOutImpl分页插件的配置（必须）
package com.example.demo.config; import com.baomidou.mybatisplus.annotation.DbType;import com.baomidou.mybatisplus.extension.plugins.MybatisPlusInterceptor;import org.springframework.context.annotation.Bean;import org.springframework.context.annotation.Configuration;import com.baomidou.mybatisplus.extension.plugins.inner.PaginationInnerInterceptor; @Configurationpublic class MyBatisPlusConfig { @Bean public MybatisPlusInterceptor mybatisPlusInterceptor() { MybatisPlusInterceptor interceptor = new MybatisPlusInterceptor(); interceptor.addInnerInterceptor(new PaginationInnerInterceptor(DbType.MYSQL)); return interceptor; }}代码
Entity
package com.example.demo.user.entity; import com.baomidou.mybatisplus.annotation.IdType;import com.baomidou.mybatisplus.annotation.TableId;import com.baomidou.mybatisplus.annotation.TableLogic;import com.baomidou.mybatisplus.annotation.TableName;import com.baomidou.mybatisplus.extension.activerecord.Model;import lombok.Data; import java.time.LocalDateTime; @Data@TableName(value = "t_user")public class User { @TableId(value = "id", type = IdType.AUTO) private Long id; private String userName; private String nickName; private String email; private LocalDateTime createTime; private LocalDateTime updateTime; @TableLogic(delval = "id") private Long deletedFlag;}Service
接口
package com.example.demo.user.service; import com.baomidou.mybatisplus.extension.service.IService;import com.example.demo.user.entity.User; public interface UserService extends IService<User> {}实现
package com.example.demo.user.service.impl; import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;import com.example.demo.user.entity.User;import com.example.demo.user.mapper.UserMapper;import com.example.demo.user.service.UserService;import org.springframework.stereotype.Service; @Servicepublic class UserServiceImpl extends ServiceImpl<UserMapper, User> implements UserService {}Controller
package com.example.demo.user.controller; import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;import com.baomidou.mybatisplus.core.metadata.IPage;import com.baomidou.mybatisplus.core.metadata.OrderItem;import com.baomidou.mybatisplus.core.toolkit.Wrappers;import com.baomidou.mybatisplus.extension.plugins.pagination.Page;import com.example.demo.user.entity.User;import com.example.demo.user.service.UserService;import io.swagger.annotations.Api;import io.swagger.annotations.ApiOperation;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; @Api(tags = "排序")@RestController@RequestMapping("sort")public class SortController { @Autowired private UserService userService; @ApiOperation("默认顺序") @GetMapping("defaultOrder") public IPage<User> defaultOrder(Page<User> page) { return userService.page(page); } @ApiOperation("通过orderItems") @GetMapping("orderItems") public IPage<User> orderItems(Page<User> page) { page.addOrder(OrderItem.desc("create_time")); // 可以指定多列。比如下边这个：按create_time排序，若create_time相同，则按id排序 // page.addOrder(OrderItem.desc("create_time"), OrderItem.asc("id")); return userService.page(page); } @ApiOperation("通过wrapper") @GetMapping("wrapper") public IPage<User> wrapper(Page<User> page) { LambdaQueryWrapper<User> queryWrapper = Wrappers.<User>lambdaQuery(); // 按create_time排序，若create_time相同，则按id排序 queryWrapper.orderByDesc(User::getCreateTime); queryWrapper.orderByAsc(User::getId); return userService.page(page, queryWrapper); } @ApiOperation("前端指定顺序") @GetMapping("byFrontEnd") public IPage<User> byFrontEnd(Page<User> page) { return userService.page(page); }}测试
访问Knife4j页面：http://localhost:8080/doc.html
1.不指定顺序
本处前端不传任何参数进行的测试。
2.后端OrderItem排序（create_time倒序）
本处前端不传任何参数进行的测试。
3.后端Wrapper排序（create_time倒序，id升序）
本处前端不传任何参数进行的测试。
4.前端指定排序（create_time倒序）
前端指定orders[0].asc和orders[0].column
结果：
关于“MyBatisPlus如何实现分页时排序”这篇文章就分享到这里了，希望以上内容可以对大家有一定的帮助，使各位可以学到更多知识，如果觉得文章不错，请把它分享出去让更多的人看到。
