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问题： 各位大侠，请赐小弟一招吧！两天了！
描述:

错误提示： org.apache.jasper.JasperException: Unable to
compile class for JSP: An error occurred at line: 8 in the generated java file Only a type can be imported. com.bjsxt.registration.service.UserManager resolves to a package An error occurred at line: 9 in the generated java file Only a type can be imported. com.bjsxt.registration.model.User resolves to a package An error occurred at line: 12 in the jsp file: /Webroot/registerDeal.jsp User cannot be resolved to a type 9: String password = request.getParameter ("password"); 10: String password2 = request.getParameter("password2"); 11: 12: User u = new User(); 13: u.setUsername(username); 14: u.setPassword(password); 15: Class.forName ("org.gjt.mm.mysql.Driver");

An error occurred at line: 12 in the jsp file: /Webroot/registerDeal.jsp User cannot be resolved to a type 9: String password = request.getParameter ("password"); 10: String password2 = request.getParameter("password2"); 11: 12: User u = new User(); 13: u.setUsername(username); 14: u.setPassword(password); 15: Class.forName ("org.gjt.mm.mysql.Driver");

An error occurred at line: 18 in the jsp file:

/Webroot/registerDeal.jsp UserManager cannot be resolved to a type 15: Class.forName

("org.gjt.mm.mysql.Driver"); 16: Connection conn = DriverManager.getConnection ("jdbc:mysql://localhost/spring" , "root" ,

"mysqladmin");

17:

18: UserManager um = new UserManager();

19: boolean exist = um.exists(u);

20: if(exist){

21: response.sendRedirect

("registerFail.jsp"); An error occurred at line: 18 in the jsp file: /Webroot/registerDeal.jsp UserManager cannot be resolved to a type

15: Class.forName ("org.gjt.mm.mysql.Driver"); 16: Connection conn = DriverManager.getConnection ("jdbc:mysql://localhost/spring" , "root" , "mysqladmin"); 17:

18: UserManager um = new UserManager();
19: boolean exist = um.exists(u); 20: if(exist){ 21: response.sendRedirect ("registerFail.jsp");

Stacktrace:

org.apache.jasper.compiler.DefaultErrorHandler. javacError(DefaultErrorHandler.java:92)

org.apache.jasper.compiler.ErrorDispatcher.java cError(ErrorDispatcher.java:330) org.apache.jasper.compiler.JDTCompiler.generate Class(JDTCompiler.java:423) org.apache.jasper.compiler.Compiler.compile

(Compiler.java:317) org.apache.jasper.compiler.Compiler.compile (Compiler.java:295)

org.apache.jasper.compiler.Compiler.compile (Compiler.java:282) org.apache.jasper.JspCompilationContext.compile (JspCompilationContext.java:586)

org.apache.jasper.servlet.JspServletWrapper.ser vice(JspServletWrapper.java:317)

org.apache.jasper.servlet.JspServlet.serviceJsp File(JspServlet.java:342)

org.apache.jasper.servlet.JspServlet.service (JspServlet.java:267) javax.servlet.http.HttpServlet.service (HttpServlet.java:717)registerDeal.jsp代码：

<%@ page language="java" c/> <%@ pageimport="com.bjsxt.registration.model.User"%>
<%
String path = request.getContextPath(); String basepath = request.getScheme() + "://" + request.getServerName() + ":" + request.getServerPort() + path + "/" ; String username = request.getParameter("username"); String password = request.getParameter("password"); String password2 = request.getParameter("password2"); User u = new User(); u.setUsername(username); u.setPassword(password); Class.forName("org.gjt.mm.mysql.Driver"); Connection conn = DriverManager.getConnection("jdbc:mysql://localhost/spring" , "root" , "mysqladmin");
UserManager um = new UserManager(); boolean exist = um.exists(u); if(exist){ response.sendRedirect("registerFail.jsp"); return ;
} um.add(u);
response.sendRedirect("registerSuccess.jsp"); %> jfal
User类代码：
package com.bjsxt.registration.model; public class User {
/> private int id ; private String username ; private String password ;
public int getId() {
return id; }
public void setId(int id) {
this.id = id; } public String getUsername() { return username; } public void setUsername(String username) {
this.username = username; } public String getPassword() {
return password; } public void setPassword(String password) {<> this.password = password; } }UserManager类代码： package com.bjsxt.registration.service;
import java.sql.Connection; import java.sql.DriverManager;
import java.sql.PreparedStatement; import java.sql.ResultSet; import com.bjsxt.registration.model.User;
public class UserManager { public boolean exists(User u)throws Exception{ Class.forName("org.gjt.mm.mysql.Driver"); Connection conn = DriverManager.getConnection("jdbc:mysql://localhost/spring""root","mysqladmin");
/> String sqlQuery = "select count(*)from user where username=?";
PreparedStatement psQuery = conn.prepareStatement(sqlQuery);
psQuery.setString(1,u.getUsername()); ResultSet rs = psQuery.executeQuery();
rs.next();
int count = rs.getInt(1);<> conn.close();
if(count > 0){ return true; }
/> return false; } public void add(User u)throws Exception{
Class.forName("org.gjt.mm.mysql.Driver");
Connection conn = DriverManager.getConnection("jdbc:mysql://localhost/spring" , "root" , "mysqladmin");
String sql = "insert into user value (null,?,?)";
/> PreparedStatement ps = conn.prepareStatement(sql);
ps.setString(1,u.getUsername()); ps.setString(2,u.getPassword());
/> ps.executeUpdate(); ps.close(); conn.close();
} }
请各位大侠、高手们赐招，小弟在此膜拜了！

解决方案1:

应该jar包引错了吧

解决方案2:

如果代码没错那大多数都是
jar包引错了

解决方案3:

org.apache.jasper.JasperException: Unable to compile class for JSP: JSP不能编译
pageEncoding="GB18030 应该要改成UTF-8吧 <%@ pageimport="com.bjsxt.registration.model.User"%> 这都没加空格

解决方案4:

恭喜！

解决方案5:

查查UserManager.class, 和User.class在哪里啊？

解决方案6:

比较怀疑你根本就没把类编译好的class文件正确放到 WEB-INF/classes 中去

解决方案7:

Only a type can be imported. com.bjsxt.registration.service.UserManager resolves to a package <%@ page import="com.bjsxt.registration.service.UserManager"%> 这东西据说是个包，而并非是Java类，你干了啥神奇的事？
莫非是定义了一个跟类重名的包？

另外： <%@ pageimport="com.bjsxt.registration.model.User"%> 这个page和import之间漏了空格吧？