查背复盘工作知识_202310月到12月

20231025,

1.HttpServletResponse

20231026,

1.Javascript:

JSON.parse(JSON.stringify(object));对象深拷贝

参考资料:https://zhuanlan.zhihu.com/p/638767443

 parse /pɑːs/ 对句子分析

20231028,

1.index.jsp

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
  <head>
    <title>$Title$</title>
    <script>
      function testStringify() {
        let obj1 = {
          "name": "zs",
          "age": 27
        };
        let json1 = JSON.stringify(obj1);
        console.log("json1=>");
        console.log(json1);
        let obj2 = {
          "name": "ls",
          "age": 30
        };
        let objs = new Array();
        objs.push(obj1);
        objs.push(obj2);
        let jsons = JSON.stringify(objs);
        console.log("jsons=>");
        console.log(jsons);
        let addOneYearJsons = JSON.stringify(objs, function(key, value) {
          if (key === 'age') {
            return value + 1;
          }
          return value;
        })
        console.log("addOneYearJsons=>");
        console.log(addOneYearJsons);
      }
      function testParse() {
        let json1 = '{"name":"zs","age":27}';
        let obj1 = JSON.parse(json1);
        console.log("obj1=>");
        console.log(obj1);
        let jsons = '[{"name":"zs","age":27},{"name":"ls","age":30}]';
        let objs = JSON.parse(jsons);
        console.log("objs=>");
        console.log(objs);
        let addOneYearJsons = '[{"name":"zs","age":28},{"name":"ls","age":31}]';
        let reduceOneYearObj = JSON.parse(addOneYearJsons, function(key, value) {
          if (key === 'age') {
            return value - 1;
          }
          return value;
        })
        console.log("reduceOneYearObj=>");
        console.log(reduceOneYearObj);
      }
    </script>
  </head>
  <body>
    <button value="testStringify" onclick="testStringify()"/>
    <button value="testParse" onclick="testParse()"/>
  </body>
</html>

2.控制台输出验证:

20231028,

1.index.jsp

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
  <head>
    <title>$Title$</title>
    <script>
      function testRemove() {
        let obj1 = {
          "name": "zs",
          "age": 27
        };
        let obj2 = {
          "name": "ls",
          "age": 30
        };
        let objs = new Array();
        objs.push(obj1);
        objs.push(obj2);
        let removeByAgeJsons = JSON.stringify(objs, function (key, value) {
          if (key === "age") {
            if (value > 27) {
              return value;
            }
            return undefined;
          }
          return value;
        })
        console.log("removeByAgeJsons=>");
        console.log(removeByAgeJsons);
        let removeByKey = JSON.stringify(objs, ["age"]);
        console.log("removeByKey=>");
        console.log(removeByKey);
      }
      function testDeepCopy() {
        let obj = {
          "name": "zs",
          "age": 27
        };
        let objDeepCopy = JSON.parse(JSON.stringify(obj));
        objDeepCopy.age = 28;
        console.log("obj=>");
        console.log(obj);
        console.log("objDeepCopy=>");
        console.log(objDeepCopy);
      }
    </script>
  </head>
  <body>
    <button value="testRemove" onclick="testRemove()"/>
    <button value="testDeepCopy" onclick="testDeepCopy()"/>
  </body>
</html>

2.控制台输出验证:

20231103,

1.格式化

bh = String.format("%02d", iBh);

2.HttpServletResponse

学习 https://juejin.cn/post/6999074771228950559

20231202,

1.@RestController的理解

在@controller注解中,返回的是字符串,或者是字符串匹配的模板名称,即直接渲染视图,与html页面配合使用的
而在@restcontroller中,返回的是一个对象,即return一个user对象,在没有页面的情况下,也能看到返回的是一个user对象对应的json字符串

2.@RequestMapping注解后url前面是否加/

加不加都行(不加的话,Spring会在最前面拼接上/),最好加上。

3.xxxMapper.java

@Select("<script>省略<when test=\"xxx!=xxx\"></when></script>")

20231204,

1.Mapper怎样传递参数(以userId为例)

@Select("省略 USER_ID = #{userId} 省略")

public List<Xxx> getXxxList(@Param("ew") Wrapper wrapper, @Param("userId") String userId);

20231207,

1.@click

js写法的函数名后面是有括号的,有无参数都写括号;而vue中无参数可以不写括号(默认会传一个事件对象$event),如果有一个参数以上,则要把参数写入括号,如果要用到事件对象,必须自己在括号的参数中写上 $event

20231213,

1.vue父子组件传值

https://blog.csdn.net/qq_41968486/article/details/109304386

https://www.jianshu.com/p/3680ba3093ed

20231225

1.排查出问题:23号背调试时遇到的登入后自动登出的原因是:本地将不同微服务连接了redis的不同database,导致登入成功后请求业务微服务接口时shiro认证失败返回401自动登出了。而不是业务微服务里没有配置ribbon.eureka.enable: true的问题。

20231226,

1.vue渲染数据到页面:

<view>{{item.bookNo}}</view>

2.js时间格式转换

var date = new Date(+new Date()+8*3600*1000).toISOString().replace(/T/g,' ').replace(/\.[\d]{3}Z/,'');
console.log(date); // 2023-12-26 20:42:20

 

posted on 2023-10-25 14:17  平凡力量  阅读(22)  评论(0编辑  收藏  举报