2010-11-05 - 03

最新推荐文章于 2021-04-22 23:58:13 发布
原创 最新推荐文章于 2021-04-22 23:58:13 发布 · 264 阅读 · 0 ·
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文章标签：

#浏览器 #Web #JSP #Servlet

本文探讨了Web开发中常见的技术问题，包括forward与redirect的区别、servlet中filter的功能、@includefile与jsp:includepage的区别、JavaBean的作用范围、防止按钮二重提交的方法及异常处理策略。

 第二部分 Web方向
               
1.forward 和 redirect区别.

 forward是服务器请求新的资源然后返回给浏览器，浏览器并不知道资源的来源，换句话说url不会变,request response信息不会丢失

 redirect是服务器通知浏览器重新请求资源，url会改变，request response信息会丢失

 

2.servlet中filter的4个常用功能

 编码？权限验证？

不了解

3.@include file=""和jsp:include page=""的区别

 动态引入 ？ 忘记了

4.写出JavaBean可以设定的四种scope.

 resquest,session,appliction,cookie

5.在web开发中防止按钮二重提交的方式.

 使用 js，点击了提交按钮后让提交按钮disabled

 

6.当你遇到下列异常时,你想到的调查和解决方式是什么?

1)ClassCastException
2)ClassNotFoundException

 类型转换错误，查看涉及到类型转换 的代码段

 找不到类  debug定位

 

 

 

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(3, 103, '2023-10-03'); ``` ### 3. 验证数据 ```sql SELECT * FROM Sailors; SELECT * FROM Boats; SELECT * FROM Reserves; ``` ### 补充说明 1. 自增主键：在MySQL中使用`AUTO_INCREMENT`，PostgreSQL使用`...
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