我承认我的回答部分是预感（因为是我很久以前写的），但是使用JSP时，通常应将form action命名为在其中配置的servlet的名称。
web.xml
我认为您的 web.xml 应该是这样的：
<servlet> <servlet-name>LoginServlet</servlet-name> <servlet-class>pl..LogoutServlet</servlet-class></servlet><servlet-mapping> <servlet-name>LoginServlet</servlet-name> <url-pattern>/login</url-pattern></servlet-mapping>
并将您的 HTML 更改为此：
<form action="LoginServlet" method="POST" id="loginForm">
对于Javascript部分，如果您使用jQuery提交表单，则可以修改参数以张贴和省略张贴密码（因为如果您希望将其以散列形式发送，则不需要密码），请参见以下使用代码：
Javascript（使用jQuery）：
// Attach a submit handler to the form$("#loginForm").submit(function( event ) { // Stop form from submitting normally event.preventDefault(); // Get some values from elements on the page: var $form = $( this ); // We want to customize what we post, therefore we format our data var data = "login="+ $('#login').val() +"&passwordHash=" + CryptoJS.MD5($('#password').val()); // For debugging purposes... see your console: // Prints out for example: login=myLoginName&passwordHash=a011a78a0c8d9e4f0038a5032d7668ab console.log(data); // The actual from POST method $.ajax({ type: $form.attr('method'), url: $form.attr('action'), data: data, success: function (data) { console.log("Hey, we got reply form java side, with following data: "); console.log(data); // redirecting example.. if(data === "SUCCESS") { window.location.replace("http://stackoverflow.com"); } } });});最后，在Java端，您将需要
doPost()捕获
login和
passwordHash赋值等方法。
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { String login = request.getParameter("login"); String password = request.getParameter("passwordHash"); // // Do what ever you want with login and passwordHash here... // // Because we are using ajax we need to respond to it stating whether we can redirect or not to new location, see lines below // Content type of the response - You could also return application/json for example (which would be better in this case) response.setContentType("text/plain"); // Using text/plain for example response.setCharacterEncoding("UTF-8"); // Change this as you like - it can also be url or anything else you want... response.getWriter().write("SUCCESS");}
