Mybatis-Plus 3.5.12 分页拦截器消失的问题及快速解决方法

package com.xx.config.mybatis;
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;
@Configuration
@MapperScan({"com.sq.twinbee.**.mapper"})
public class MybatisPlusConfig {
@Bean
public MybatisPlusInterceptor mybatisPlusInterceptor() {
MybatisPlusInterceptor interceptor = new MybatisPlusInterceptor();
// 添加分页拦截器
interceptor.addInnerInterceptor(new PaginationInnerInterceptor());
return interceptor;
}
}

<dependency>
<groupId>com.baomidou</groupId>
<artifactId>mybatis-plus-core</artifactId>
<version>3.5.12</version>
</dependency>

<dependency>
<groupId>com.baomidou</groupId>
<artifactId>mybatis-plus-extension</artifactId>
<version>3.5.12</version>
</dependency>

@Configuration
@MapperScan({"com.xx.**.mapper"}) // 扫描Mapper接口所在包
public class MybatisPlusConfig {
@Bean
public MybatisPlusInterceptor mybatisPlusInterceptor() {
MybatisPlusInterceptor interceptor = new MybatisPlusInterceptor();
// 注意：这里可以指定数据库类型，避免分页语句适配问题
interceptor.addInnerInterceptor(new PaginationInnerInterceptor(DbType.MYSQL));
return interceptor;
}
}

public interface UserMapper extends BaseMapper<User> {
// 自定义分页查询（可选）
IPage<User> selectUserByAge(Page<User> page, @Param("age") Integer age);
}

@Service
public class UserServiceImpl extends ServiceImpl<UserMapper, User> implements UserService {
@Override
public IPage<User> getUserPage(Integer pageNum, Integer pageSize) {
// 创建分页对象
Page<User> page = new Page<>(pageNum, pageSize);
// 调用BaseMapper的selectPage方法
return baseMapper.selectPage(page, null);
}
@Override
public IPage<User> getUserByAge(Integer pageNum, Integer pageSize, Integer age) {
Page<User> page = new Page<>(pageNum, pageSize);
// 调用自定义分页方法
return baseMapper.selectUserByAge(page, age);
}
}

@RestController
@RequestMapping("/user")
public class UserController {
@Autowired
private UserService userService;
@GetMapping("/page")
public Result<IPage<User>> getUserPage(
@RequestParam(defaultValue = "1") Integer pageNum,
@RequestParam(defaultValue = "10") Integer pageSize) {
IPage<User> page = userService.getUserPage(pageNum, pageSize);
return Result.success(page);
}
}

{
"code": 200,
"msg": "success",
"data": {
"records": [
{"id": 1, "name": "张三", "age": 20},
{"id": 2, "name": "李四", "age": 22}
],
"total": 100, // 总记录数
"size": 10, // 每页条数
"current": 1, // 当前页码
"pages": 10, // 总页数
"hasNext": true, // 是否有下一页
"hasPrevious": false // 是否有上一页
}
}