如何找出我的servlet中推送的HTML按钮？

Question

我正在创建一个包含两个提交按钮的注册表单.我需要知道在我的servlet代码中单击哪个按钮？

Answer 1

阅读这个问题的答案.

所以,在

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

非空值是按下的按钮.

或者,如果要对两个按钮使用相同的名称,则可以设置不同的值

<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!
}