如何找出哪些HTML按钮在我的servlet推？ [英] How to find out which HTML button was pushed in my servlet?

问题描述

我创建包含两个提交按钮登记表。
我需要知道被点击的形式在我的servlet code哪个按钮？

I am creating a registration form which contains two submit buttons. I need to know which button is clicked in the form in my servlet code?

推荐答案

阅读答案的这个问题。

所以，在

String button1 = request.getParameter("button1");
String button2 = request.getParameter("button2");

这是不是空的值是pressed按钮。

the value which isn't null is the pressed button.

或者，如果你想使用相同的名称为两个按钮可以设置不同的值

Or, if you want to use the same name for the two buttons you can set a different value

<input type="submit" name="act" value="delete"/>
<input type="submit" name="act" value="update"/>

然后

String act = request.getParameter("act");
if (act == null) {
    //no button has been selected
} else if (act.equals("delete")) {
    //delete button was pressed
} else if (act.equals("update")) {
    //update button was pressed
} else {
    //someone has altered the HTML and sent a different value!
}

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