logon.java

jsp范例宝典

package com.safe.UserLogon;

import java.sql.*;
public class Logon {
	private String username;
	private String userpassword;
	private Checkstr check=new Checkstr();
	public Logon(){}
	public void setUsername(String username){
		this.username=check.dostring(username);
	}
	public String getUsername(){
		return this.username;
	}
	public void setUserpassword(String userpassword){
		this.userpassword=check.dostring(userpassword);
	}
	public String getUserpassword(){
		return this.userpassword;
	}
    public String checklogon(){
    	String backmess="";
    	boolean mark=true;
    	if(this.username.equals("")){
    		mark=false;
    		backmess+="<li>请输入<b>用户名！</b></li><br>";
    	}
    	if(this.userpassword.equals("")){
    		mark=false;
    		backmess+="<li>请输入<b>密&nbsp;&nbsp;码！</li></b>";
    	}
    	if(!mark){
    		return backmess;
    	}
    	String sql="select * from tb_userlogon where user_name='"+this.username+"' and user_password='"+this.userpassword+"'";
    	DB db=new DB();
    	ResultSet rs=db.search(sql);
    	try{
    		if(rs.next()){
    			backmess="登录成功！<br>用户名："+this.username+"<br>密&nbsp;&nbsp;码："+this.userpassword;
    		}
    		else{
    			backmess="登录失败！<br>输入的<b>用户名</b>或<b>密码</b>不正确！";
 	  		}
    	}
    	catch(Exception e){
    		e.printStackTrace();
    		backmess="操作失败！";
    	}
    	db.closed();
    	return backmess;
    } 
}