这是dbBean页面
package com.regist;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
public class dbBean {
Connection con = null;
Statement stat = null;
ResultSet rs = null;
PreparedStatement pstat = null;
public dbBean(){}
public Connection getcon() throws SQLException{
try {
Class.forName("com.mysql.jdbc.Driver");
String url = "jdbc:mysql://localhost:3306/land?user=root&password=root";
con = DriverManager.getConnection(url);
} catch (Exception e) {
e.printStackTrace();
}
return con;
}
//执行数据库查询并返回查询结果
public ResultSet query(String sql){
try{
con = getcon();
stat = con.createStatement();
rs = stat.executeQuery(sql);
}catch(Exception ex){
ex.printStackTrace();
}
return rs;
}
//执行数据库更新
public void update(String sql){
try{
con = getcon();
stat = con.createStatement();
stat.executeUpdate(sql);
}catch(Exception ex){
ex.printStackTrace();
}
}
//执行数据库更新
public void update(String sql,String[] args){
try{
con = getcon();
pstat = con.prepareStatement(sql);
for (int i=0;i<args.length;i++){
pstat.setString(i+1,args[i]);
}
pstat.executeUpdate();
}catch(Exception ex){
ex.printStackTrace();
}
}
//关闭数据库连接
public void close(){
try{
if (rs != null)rs.close();
if (stat != null)stat.close();
if (pstat != null)pstat.close();
if (con != null)con.close();
}catch(Exception ex){
ex.printStackTrace();
}
}
}
这是userBean页面
package com.regist;
public class userBean {
String userName = null;
String userPwd = null;
boolean login = false;
public userBean(){
}
public String getUserName() {
return userName;
}
public void setUserName(String userName) {
this.userName = userName;
}
public String getUserPwd() {
return userPwd;
}
public void setUserPwd(String userPwd) {
this.userPwd = userPwd;
}
public boolean isLogined() {
return login;
}
public void setLogined(boolean logined) {
this.login = logined;
}
}
这是login登陆界面
<%@page import="java.sql.ResultSet"%>
<%@page import="java.sql.DriverManager"%>
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
function cheek() { if(document.getElementsByName("userName").value==""){ alert("对不起，用户名不能为空值!"); return false; } if(document.getElementsByName("passWord").value==""){ alert("对不起，密码不能为空值!");return false; } return true; }
用户登陆
用户名：
密 码：
<label>
<input type="submit" value="提交" name="name">
<input type="reset" value="重置" name="reset">
<input type="button" value="注册" name="button">
</label>
这是regist页面
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@ page import="java.sql.*"%>
<%@ page import="com.regist.dbBean" %>
<%@ page import="com.regist.userBean" %>
/jsp:useBean
/jsp:useBean
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
验证用户登录
<%
String userName = user.getUserName();
String userPwd = user.getUserPwd();
String sql = "select * from land where account='"+userName+"' and password='"+userPwd+"'";
if (user.isLogined()){
out.println("您已经登录过了!");
}else{
ResultSet rs = dbB.query(sql);
if (rs.next()){
user.setLogined(true);
out.println("恭喜您登录成功!");
}else{
user.setLogined(false);
out.println("对不起，您的帐号或密码不正确!");
}
}
%>
运行说是这里错了，各位大神帮帮忙，十分感谢
org.apache.jasper.JasperException: An exception occurred processing JSP page /regist.jsp at line 42
39: out.println("鎮ㄥ凡缁忕櫥褰曡繃浜�");
40: }else{
41: ResultSet rs = dbB.query(sql);
42: if (rs.next()){
43: user.setLogined(true);
44: out.println("鎭枩鎮ㄧ櫥褰曟垚鍔�");
45: }else{
