菜鸟问题急求解答！

[zjqgqq]

我不知道哪里错了，，，希望哪位朋友帮我调试一下，，，我实在找不出哪里错了。。。。。。。我是个新手，很多知识点还不懂。

这是一个JSP接受页面的代码，check.jsp

<%@ page language="java" import="java.util.*,util.Tool" pageEncoding="GBK"%>
<%@ page import="vo.UserInfo"%>
<%@ page import="bean.T_userInfo" %>

<%
String username=Tool.getParameter(request,"username","");
UserInfo findUser = new UserInfo();
findUser.setUsername(username);

T_userInfo cu = new T_userInfo();
if(cu.checkUsername(findUser)){
out.println("恭喜您！该用户未被注册！");
}else{
out.println("该用户名已被占用，请您重新填写一个用户名！");
}
%>

这是一个包，其中包括了上面代码所用到checkUsername类
package bean;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import java.sql.ResultSet;

import util.DBConnect;
import vo.UserInfo;

public class T_userInfo {

public boolean addUserInfo(UserInfo userInfo){ Connection conn = null; PreparedStatement pstmt = null;
try{
conn = DBConnect.getConnect();
String sql = "insert into user_info(userName,password,name,year,month,day,sex,telephone,email,province,city,agree,regIp,regTime) values(?,?,?,?,?,?,?,?,?,?,?,?,?,?)"; pstmt = conn.prepareStatement(sql);
int i = 1;
pstmt.setString(i++,userInfo.getUsername());
pstmt.setString(i++,userInfo.getPassword());
pstmt.setString(i++,userInfo.getName());
pstmt.setString(i++,userInfo.getYear());
pstmt.setString(i++,userInfo.getMonth());
pstmt.setString(i++,userInfo.getDay());
pstmt.setString(i++,userInfo.getSex());
pstmt.setString(i++,userInfo.getTelephone());
pstmt.setString(i++,userInfo.getEmail());
pstmt.setString(i++,userInfo.getProvince());
pstmt.setString(i++,userInfo.getCity());
pstmt.setString(i++,userInfo.getAgree());
pstmt.setString(i++,userInfo.getRegIp());
pstmt.setString(i++,userInfo.getRegTime());

pstmt.execute();

}
catch(SQLException e){
e.printStackTrace();
return false;
}
finally{
try{ pstmt.close();
conn.close();
}
catch(SQLException e){
e.printStackTrace();
return false;
}
}
return true;
}

public boolean checkUsername(UserInfo findUser){
Connection conn=null;
PreparedStatement pstmt = null;
ResultSet rs = null;

try {

conn = DBConnect.getConnect();
String sql = "select * from user_info where username= ?";
pstmt = conn.prepareStatement(sql);
pstmt.setString(1,findUser.getUsername());

rs = pstmt.executeQuery();
if(rs == null || rs.next()){
return false;
}
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}finally{
try {
rs.close();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
try {
conn.close();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
try {
pstmt.close();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
return true;

}


}