只需给各个按钮元素一个唯一的名称即可。按下按钮后，按钮的名称可用作请求参数，就像输入元素一样。
您只需要确保按钮输入的
type="submit"in
<input type="submit">和
<buttontype="submit">and not一样
type="button"，这仅呈现一个“死”按钮，仅用于
onclick填充所有内容。
例如
<form action="${pageContext.request.contextPath}/myservlet" method="post"> <input type="submit" name="button1" value="Button 1" /> <input type="submit" name="button2" value="Button 2" /> <input type="submit" name="button3" value="Button 3" /></form>与
@WebServlet("/myservlet")public class MyServlet extends HttpServlet { @Override protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { MyClass myClass = new MyClass(); if (request.getParameter("button1") != null) { myClass.method1(); } else if (request.getParameter("button2") != null) { myClass.method2(); } else if (request.getParameter("button3") != null) { myClass.method3(); } else { // ??? } request.getRequestDispatcher("/WEB-INF/some-result.jsp").forward(request, response); }}另外，也可以使用
<button type="submit">代替
<inputtype="submit">，然后为它们赋予相同的名称，但使用唯一的值。的值
<button>将不会用作标签，您只需将自己指定为孩子即可。
例如
<form action="${pageContext.request.contextPath}/myservlet" method="post"> <button type="submit" name="button" value="button1">Button 1</button> <button type="submit" name="button" value="button2">Button 2</button> <button type="submit" name="button" value="button3">Button 3</button></form>与
@WebServlet("/myservlet")public class MyServlet extends HttpServlet { @Override protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { MyClass myClass = new MyClass(); String button = request.getParameter("button"); if ("button1".equals(button)) { myClass.method1(); } else if ("button2".equals(button)) { myClass.method2(); } else if ("button3".equals(button)) { myClass.method3(); } else { // ??? } request.getRequestDispatcher("/WEB-INF/some-result.jsp").forward(request, response); }}
