随笔分类 -  java——spring boot

摘要:@RequestMapping(value = "/test5") //请求转发 public void test5(HttpServletRequest request,HttpServletResponse response) throws ServletException, IOExcepti 阅读全文
posted @ 2023-01-08 16:59 小白龙白龙马
摘要:getParameter(String name) getParameterValues (String name) getParameterNames() getParameterMap() 代码: package org.example.controller; import org.spring 阅读全文
posted @ 2023-01-08 16:20 小白龙白龙马
摘要:代码: package org.example.controller; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.Rest 阅读全文
posted @ 2023-01-08 15:01 小白龙白龙马
摘要:方式一: 方式二: 本地示例: package org.example.controller; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.ann 阅读全文
posted @ 2023-01-08 14:47 小白龙白龙马
摘要:request原理: request功能: 代码示例: package org.example.controller; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework. 阅读全文
posted @ 2023-01-08 14:30 小白龙白龙马
摘要:HTTP概述: HTTP_请求消息_请求行: HTTP消息的结构 先看Request 消息的结构, Request 消息分为3部分: 第一部分叫Request line(请求行); 第二部分叫Request header(请求头); ——————空行———————— 第三部分是body(请求体); 阅读全文
posted @ 2023-01-08 14:02 小白龙白龙马
摘要:https://blog.csdn.net/qq_58168493/article/details/122731122 阅读全文
posted @ 2023-01-07 22:32 小白龙白龙马
摘要:Mybatis中的多表查询之用户与账户(一对多和一对一/多对一) 结果集封装到对象 立即加载与延迟加载 Mybatis表之间关系有三种: 1、 一对一:人和身份证号是一对一 2、 一对多:一个用户和多个订单是一对多 3、 多对一:多个订单和一个用户是多对一(用户角度) 4、 多对多:老师和学生之间是 阅读全文
posted @ 2023-01-07 22:30 小白龙白龙马
摘要:注意: 数据库: CREATE TABLE `user2` ( `id` int , `name` varchar(255) , `age` int ) ; insert into user2( id,name,age ) values ( 41,"wang",25); CREATE TABLE ` 阅读全文
posted @ 2023-01-07 22:23 小白龙白龙马
摘要:本地数据库登录: C:\Users\lenovo>cd C:\Program Files\mysql8\mysql-8.0.29-winx64\mysql-8.0.29-winx64\bin C:\Program Files\mysql8\mysql-8.0.29-winx64\mysql-8.0. 阅读全文
posted @ 2023-01-07 19:01 小白龙白龙马
摘要:pojo类: package org.example.entity; public class MyUser { private int id; private String name; private int age; public int getId() { return id; } publi 阅读全文
posted @ 2023-01-07 14:54 小白龙白龙马
摘要:pojo类: package org.example.entity; public class MyUser { private int id; private String name; private int age; public int getId() { return id; } publi 阅读全文
posted @ 2023-01-07 14:17 小白龙白龙马
摘要:pojo类: package org.example.entity; public class MyUser { private int id; private String name; private int age; public int getId() { return id; } publi 阅读全文
posted @ 2023-01-07 13:59 小白龙白龙马
摘要:这种情况下,语句怎么写: pojo类: package org.example.entity; public class MyUser { private int id; private String name; private int age; public int getId() { retur 阅读全文
posted @ 2023-01-07 13:24 小白龙白龙马
摘要:pojo类: package org.example.entity; public class MyUser { private int id; private String name; private int age; public int getId() { return id; } publi 阅读全文
posted @ 2023-01-07 00:53 小白龙白龙马
摘要:pojo类: package org.example.entity; public class MyUser { private int id; private String name; private int age; public int getId() { return id; } publi 阅读全文
posted @ 2023-01-06 23:47 小白龙白龙马
摘要:pojo类: package org.example.entity; public class MyUser { private int id; private String name; private int age; public int getId() { return id; } publi 阅读全文
posted @ 2023-01-06 23:20 小白龙白龙马
摘要:mapper层: package com.demo.mapper; import java.util.List; import org.apache.ibatis.annotations.Mapper; import org.apache.ibatis.annotations.Param; impo 阅读全文
posted @ 2023-01-05 23:26 小白龙白龙马
摘要:pojo类: package org.example.entity; public class MyUser { private int id; private String name; private int age; public int getId() { return id; } publi 阅读全文
posted @ 2023-01-05 23:08 小白龙白龙马