mybatis-plus返回查询总记录数方式
时间：2022-10-20 10:15:21|栏目：JAVA代码|点击： 次
mybatis-plus返回查询总记录数
mp框架提供了selectCount方法，来查询总记录数；
需求：
查找薪水大于3500 名字里有“小”的 员工的个数
sql实现：
select count(*) from t_employee where salary>3500 and name like ‘%小%'
代码实现：
@Test
public void selectCountByQueryWrapper11(){
QueryWrapper<Employee> queryWrapper=new QueryWrapper();
// QueryWrapper<Employee> queryWrapper2=Wrappers.<Employee>query();
queryWrapper.gt("salary",3500).like("name","小");
Integer count = employeeMapper.selectCount(queryWrapper);
System.out.println(count);
}
mybatis-plus分页查询，总条数为零的解决
package com.integration.config;
import com.baomidou.mybatisplus.extension.plugins.PaginationInterceptor;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
@Configuration
@MapperScan("com.integration.mapper")
public class MybatisPlusConfig {
@Bean
public PaginationInterceptor paginationInterceptor() {
PaginationInterceptor page = new PaginationInterceptor();
return page;
}
}
