Question

JSP页面运行错误User cannot be resolved to a type

HTTP Status 500 -

--------------------------------------------------------------------------------

type Exception report

message

description The server encountered an internal error () that prevented it from fulfilling this request.

exception

org.apache.jasper.JasperException: Unable to compile class for JSP

Generated servlet error:
Only a type can be imported. com.lut.shopping.User resolves to a package

An error occurred at line: 4 in the jsp file: /Shopping/WebContent/register.jsp
Generated servlet error:
User cannot be resolved to a type

An error occurred at line: 4 in the jsp file: /Shopping/WebContent/register.jsp
Generated servlet error:
User cannot be resolved to a type

org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:512)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:377)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)

root cause

org.apache.jasper.JasperException: Unable to compile class for JSP

Generated servlet error:
Only a type can be imported. com.lut.shopping.User resolves to a package

An error occurred at line: 4 in the jsp file: /Shopping/WebContent/register.jsp
Generated servlet error:
User cannot be resolved to a type

An error occurred at line: 4 in the jsp file: /Shopping/WebContent/register.jsp
Generated servlet error:
User cannot be resolved to a type

org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:84)
org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:328)
org.apache.jasper.compiler.JDTCompiler.generateClass(JDTCompiler.java:414)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:297)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:276)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:264)
org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:563)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:305)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)

note The full stack trace of the root cause is available in the Apache Tomcat/5.5.20 logs.

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Apache Tomcat/5.5.20

以上是错误代码，下面是错误的位置
<%@ page language="java" contentType="text/html; charset=GB18030" import="java.sql.*"
pageEncoding="GB18030"%>
<%@ page import="com.lut.shopping.User" %>
<%
String action = request.getParameter("action");
if(action !=null && action.trim().equals("register")) {
String username = request.getParameter("username");
String password = request.getParameter("password");
String phone = request.getParameter("phone");
String addr = request.getParameter("addr");
User u = new User();
u.setUsername(username);
u.setPassword(password);
u.setAddr(addr);
u.setRdate(new Timestamp(System.currentTimeMillis()));
u.save();
out.println("注册成功");
}
%>

Answer 1

错误提示告诉你User类不是一个类型，他没办法找到User这个类！
所以你去检查一下你导入的类(com.lut.shopping.User)是不是存在问题。

Answer 2

可能你的User类引用的不对，仔细检查一下你的User类的包名类名对不对。
错误提示貌似是说你的User是个包，而不是一个类，问题应该就在User上好好检查一下

Answer 3

u.setRdate-->u.setdate 这个错误估计是打错字了，好好检查检查把。
检查方法：用out.print（变量）追踪各个变量，还要仔细检查写的javabean。
你这个具体错误一下也看不出来，自己好好看看把，祝你好运！

Answer 4

<%@ page import="com.lut.shopping.User" %>

检查下路径

Answer 5

楼主的问题解决了吗？我也遇到了相同的问题，求解释啊。