摘要： select单条数据 package entity; public class User { private Integer id; private String username; private Integer age; private Integer score;}package dao; p 阅读全文

摘要： 什么是Mapper drop database if exists mybatis_demo;create database mybatis_demo;use mybatis_demo;create table user ( id int auto_increment primary key, us 阅读全文

摘要： 引入IOC之前 代码实现 package entity;public class User { private Integer id; private String name; private Integer gender; // 省略getter&setter方法}package vo; publ 阅读全文