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Spring mvc 中文乱码日期

W_SJ_SY — Sat, 20 Nov 2021 15:48:28 +0800

smvc ThymeleafConfig 视图模板 package ws.wsj.config; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.ComponentScan; import org.springframework.context.annotation.Configuration; import org.springframework.web.b

mybatis 通用Mapper 插件 tk-mybatis

W_SJ_SY — Wed, 27 Oct 2021 08:52:45 +0800

通用Mapper,使用插件 tk-mybatis 接口 package ws.wsj.mapper; import tk.mybatis.mapper.common.Mapper; import ws.wsj.pojo.Ke; //插件tk-mybatis 通用mapper public interface KeMapper extends Mapper { } package ws.wsj.pojo; import lombok.AllArgsConstructor; imp

mybatis 数据库存储图片；时间使用

W_SJ_SY — Wed, 27 Oct 2021 08:44:28 +0800

java boolean 映射 mysql bit 或者是 tinyint unsigned java LocalDate 映射 mysql date java LocalTime 映射 mysql time java LocalDataTime 映射 mysql DataTime java.util.Date 映射 mysql Datetime 数据库存储图片 package ws.wsj.mapper; import org.apache.ibatis.annotations.Insert; impo

mybatis 分页

W_SJ_SY — Tue, 26 Oct 2021 20:22:11 +0800

mybatis 分页 ;插件 pagehelper DiMapper 类 package ws.wsj.mapper; import org.apache.ibatis.annotations.Param; import org.apache.ibatis.annotations.Select; import ws.wsj.pojo.User; import java.util.List; public interface DiMapper { public int count();

mybatis 获取自增主键

W_SJ_SY — Tue, 26 Oct 2021 20:14:14 +0800

1 使用配置(映射文件)文件(KaiMapper.xml); 2 使用注解(KaiMapper.java) KaiMapper类 package ws.wsj.mapper; import org.apache.ibatis.annotations.Insert; import org.apache.ibatis.annotations.Options; import java.util.List; import java.util.Map; public interface KaiMapper {

mybatis logback日志输出

W_SJ_SY — Tue, 26 Oct 2021 19:56:08 +0800

插件 logback日志插件; HikariCP连接池插件 CartMapper类 package ws.wsj.mapper; import org.apache.ibatis.annotations.Select; public interface CartMapper { @Select("select version()") public String version(); } CartMapper测试类 package ws; import com.zaxxer.hika

mybatis 数据库crud 接口和映射文件分开存放

W_SJ_SY — Tue, 26 Oct 2021 19:41:59 +0800

CartMapper接口类 package ws.wsj.mapper; import org.apache.ibatis.annotations.Delete; import org.apache.ibatis.annotations.Insert; import org.apache.ibatis.annotations.Param; import org.apache.ibatis.annotations.Select; import ws.wsj.model.Cart; import java.

Ajax axios 同时执行两个请求；创建实例化；添加拦截器

W_SJ_SY — Tue, 26 Oct 2021 16:15:20 +0800

axios 两个都处理完,在执行,创建实例

Ajax axios get和post请求

W_SJ_SY — Tue, 26 Oct 2021 16:02:32 +0800

axios.get传值使用params:{} axios.post传值,直接写 axios get post </title&g </article> <article> <h1>Ajax axios get请求时钟案例</h1> <p>W_SJ_SY — Tue, 26 Oct 2021 15:50:20 +0800</p> <!DOCTYPE html> <html lang="zh-CN"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width,initial-scale=1"> <title>axios 时钟案例

Ajax Fetch 表单提交,存入数据库,查看,删除

W_SJ_SY — Tue, 26 Oct 2021 15:41:42 +0800

表单提交,存入数据库,从数据库中查看数据,删除数据 fetch

Ajax Fetch get和post请求一

W_SJ_SY — Tue, 26 Oct 2021 15:27:20 +0800

fetch

Javascript 数组 filter,sort,Array.isArray()

W_SJ_SY — Sat, 16 Oct 2021 10:17:10 +0800

过滤 filter; 排序 arr.sort; 判断是不是数组 Array.isArray(); //过滤 filter let arr = ["hello", "word", "java", "hi"]; arr.push("hello"); console.log(arr) for (let a of arr.filter(e => e.startsWith("h"))) { console.log(a) } // v 值; i 索引 arr.forEach((v, i) => {

Javascript 数组crud

W_SJ_SY — Sat, 16 Oct 2021 10:14:03 +0800

数组crud 添加元素尾部 arr.push; 开头 unshift; 删除元素尾部 arr.pop; 开头 shift; 从1开始截取,不包括3 arr.slice(1,3); 从1的位置添加元素,并删除元素 arr.splice(1,0,“hello”); //数组crud let arr = ["hello", "word", "java"]; //添加元素 //尾部 arr.push arr[arr.length] = "html"; arr.push("php"); console.log(

Javascript 数组

W_SJ_SY — Sat, 16 Oct 2021 10:08:24 +0800

检查索引位置 indexof lastIndexof 搜索 search 以什么开头 startsWith ; 以什么结尾 endsWith 分割 split; charAt 检索 pattern.test(str); 补位 padStart 字符串转数字 parseInt parseFloat let str = "hello word java"; //检查 console.log(str.indexOf("hello"), str.lastIndexOf("java")); //转换大小写;搜索 se

Javascript for语句；搜索 search

W_SJ_SY — Sat, 16 Oct 2021 09:37:29 +0800

搜索 search

Javascript for语句输出菱形；反转

W_SJ_SY — Sat, 16 Oct 2021 09:31:59 +0800

分裂 split; 反转reverse; 合成 join for (let i = 1; i <= 5; i++) console.log(i) //循环语句,输出菱形 let sp = 10; for (let i = 1; i <= 10; i += 2) { console.log(" ".repeat(--sp) + "*".repeat(i)) } for (let i = 7; i >= 1; i -= 2) { console.log(" ".repeat(

Javascript Math 随机 random

W_SJ_SY — Sat, 16 Oct 2021 09:28:06 +0800

Math 内置对象舍掉小数 floor; 有小数就进位 ceil; 几的几次方 pow; 四舍五入 round //Math内置对象 // 舍掉小数 floor; 有小数就近位 ceil; 几的几次方 pow console.log(Math.floor(1.5), Math.ceil(1.1), Math.pow(2, 2)); for (let i = 1; i <= 5; i++) //四舍五入 round // console.log(Math.round(Math.rand

Javascript 定时器, 时钟

W_SJ_SY — Sat, 16 Oct 2021 09:25:19 +0800

查询选择器 querySelector 补位 padStart 定时器,时钟

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Spring mvc 中文乱码 日期