Question

我尝试学习会话隐式对象。请检查。在index.jsp我创建了一个表单。点击提交按钮后，它将重定向到welcome.jsp。在welcome.jsp我正在创建会话属性，在同一页面中我们重定向到second.jsp。在second.jsp中，我们将通过会话获取名称。但是在 welcom.jsp文件中出错了。找不到符号：变量位置：class simplyfiedJSPServlet 。

enter image description here

的index.jsp

 <%@page contentType="text/html" pageEncoding="UTF-8"%>
    <!DOCTYPE html>
    <html>
        <head>
            <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
            <title>JSP Page</title>
        </head>
        <body>
               <h1> This for getting session implicit object </h1>
                <form action="welcome3.jsp">
                    <input type="text" name="uname">
                    <input type="submit" value="go"><br/>                    
                </form>                
        </body>
    </html>

的welcome.jsp

<%@page contentType="text/html" pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
    <head>
        <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
        <title>JSP Page</title>
    </head>
    <body>
         <% 
             String name=request.getParameter("uname");
             out.print("Welcome"+name);
             session.setAttribute("user", name);
             <a href ="second.jsp" > second jsp  </a>
         %>
    </body>
</html>

second.jsp

<%@page contentType="text/html" pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
    <head>
        <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
        <title>JSP Page</title>
    </head>
    <body>
        <% 
            String name=(String )session.getAttribute("user");
        %>
    </body>
</html>

的web.xml

<web-app>
    <error-page>
        <error-code> 500</error-code>
        <location> /error.jsp</location>
    </error-page>
</web-app>

Answer 1

你在java代码中有html标签，

     <% 
         String name=request.getParameter("uname");
         out.print("Welcome"+name);
         session.setAttribute("user", name);
          <a href ="second.jsp" > second jsp  </a> // html anchor tag
     %>

应该在它之外，

<a href ="second.jsp" > second jsp  </a>

what are scriptlets in jsp?

jsp文件中的编译错误“找不到符号：变量一个位置：class simplyfiedJSPServlet”

1 个答案: