JSP请求的资源不可用

时间:2013-01-16 17:42:54

标签: jsp

当我启动loginPage.jsp表单并输入用户名和密码时出现此错误:

type Status report

message /WHFM/LoginServlet.java

description The requested resource is not available.

我缺少什么?我读过有关同一问题的文章,但我觉得区分大小写是正确的,这里。

 <form name="loginForm" method="Post" action="LoginServlet.java">
    <table>
    <tr>
    <td>Username:</td>
    <td><input type="text" name="uname"></td></tr>


    <tr><td>Password:</td>
    <td><input type="password" name="pass"></td>
    </tr>
    <tr><td></td><td><input type="submit" value="submit" name="submit"></td></tr>
    </table>

    </form>

和servlet是:

 protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
    DBConnection connString = new DBConnection();
    String query = "";
    String username= request.getParameter("uname");
    String password = request.getParameter("pass");
    int counter= 0;

    try {
         response.setContentType("text/html");
            PrintWriter out=response.getWriter();
        connString.getConnection();
        query="Select * from user where username='"+username+"' and password='"+password+"' ";
        System.out.println(query);
        Statement st = connString.getConnection().createStatement();
        ResultSet rs= st.executeQuery(query);
        while(rs.next()){
            counter++;
        }
        if(counter>0){
            response.sendRedirect("welcome.jsp");
        }
        else{
            response.sendRedirect("LoginPage.jsp");
        }

这是我的XML:

  <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0">
  <display-name>WHFM</display-name>
  <welcome-file-list>
    <welcome-file>index.jsp</welcome-file>
     </welcome-file-list>


<servlet>

<servlet-name>LoginServlet</servlet-name>
<servlet-class>servlets.LoginServlet</servlet-class>
</servlet>

<servlet-mapping>

<servlet-name>LoginServlet</servlet-name>
<url-pattern>/LoginServletPath</url-pattern>
</servlet-mapping>
</web-app>

2 个答案:

答案 0 :(得分:1)

<form action> URL不得指向servlet类的类文件名。它必须指向一个可由Web浏览器公开访问的URL,正好是您需要在浏览器的地址栏中输入的URL。

您已在/LoginServletPath的网址格式上映射了servlet,因此http://localhost:8080/WHFM/LoginServletPath可以使用该格式,因此您需要相应地修复<form action>网址:

<form action="LoginServletPath">

或者,如果您希望能够在任何地方移动JSP文件而不必担心相对URL,

<form action="${pageContext.request.contextPath}/LoginServletPath">

对具体问题your JDBC code is leaking resources

无关。我会尽快解决这个问题。

答案 1 :(得分:0)

确保您在webapp文件夹中找到所有类并映射您的'servlet'和'servlet-mapping'在您的web.xml中

喜欢:

<servlet>

<servlet-name>HelloWorld</servlet-name>
<servlet-class>your.package.name.HelloWorld</servlet-class>

</servlet>

<servlet-mapping>

<servlet-name>HelloWorld</servlet-name>
<url-pattern>/hello</url-pattern>

</servlet-mapping>

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