logon.java

jsp范例宝典

package com.safe.UserLogon;

import java.sql.*;
public class Logon {
	private String username;
	private String userpassword;
	private String userinputnum;
	private String makechecknum;
	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 void setUserchecknum(String userinputnum){
		this.userinputnum=userinputnum;
	}
	public String getUserchecknum(){
		return this.userinputnum;
	}
	public void setMakechecknum(String makechecknum){
		this.makechecknum=makechecknum;
	}
	public String getMakechecknum(){
		return this.makechecknum;
	}
    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！</b></li>";
    	}
        if(this.userinputnum.equals("")){
        	mark=false;
        	backmess+="<li>请输入<b>验证码！</b></li>";
        }
    	if(!mark){
    		return backmess;
    	}
    	if(!((this.userinputnum).equals(this.makechecknum))){
    		backmess+="<li>输入的<b>验证码</b>不正确！</li><br>生成的验证码："+this.makechecknum+"<br>输入的验证码："+this.userinputnum;
    		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><b>用户名：</b>"+this.username+" <b>密码：</b>"+this.userpassword+" <b>验证码：</b>"+this.makechecknum;
    		}
    		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;
    } 
}