有些时候提交表单后需要我们留在原来表单的界面，那么提交后如何使表单里面的内容清空或者保留呢？作为一个小知识点我总结了下：（以后我还会补充些相关内容）

表单里的内容我经过在servelet测试替换红色部分的内容，

        int b = new MemberDao.save(member);
        if(b!=0){
 out.print("<script>alert('提交成功')</script>");
 out.print("<script>location.href='WebPage/wyrh.jsp';</script>");
 out.print("true");
        }else{
 out.print("error");
        }

A combined fireworks and drone performance show in Liuyang City, central China's Hunan Province, December 7, 2024. [Photo/Xinhua]

By Sergey Gordeev

By Imran Khalid

By all appearances, the image from London of American and Chinese officials arrayed side by side indicates a moment of significant recalibration in one of the most consequential bilateral relationships of our time. In a world rocked by tariff tantrums, hawkish rhetoric and competitive decoupling, the recent China-U.S. economic and trade consultation mechanism meeting in London offered something rare: a signal of strategic maturity and purposeful dialogue.

date back to：追溯到，始于，自…至今

一、短语记忆

date是“日子，日期”的意思，back，表示“回”的意思，date back to表示日期回到…，所以是“追溯到，始于，自…至今”。这个短语也可以写成date from。

一、history对象

history 对象是历史对象。包含用户（在浏览器窗口中）访问过的 URL。history 对象是 window 对象的一部分，可通过 window.history 属性对其进行访问。

“英国历史上和平时期最大规模的遣返。 ”

全球历史最悠久的旅行公司之一，托马斯库克集团(Thomas Cook Group)已立即开始强制性清算。随着所有航班和旅行的取消，预计全球将至少有60万人受到影响。

Overburdened by a crippling $2.1 billion debt, one of the oldest and largest in the world entered compulsory liquidation after last-ditch efforts to negotiate restructuring failed.