registerformbean.java

深入JavaWeb开发内幕核心基础书中源码

package org.it315.bean;
import java.util.*;

/*RegisterFormBean用于封装注册表单的信息，其中定义了四个属性：name、password1、
password2和email。RegisterFormBean还对这四个属性进行基本的格式验证，如果
有误则将相应的错误信息保存到一个HashTable对象中，同时也定义了供JSP页面
检索错误信息的方法。*/
public class RegisterFormBean
{
	private String name = "";
	private String password1 = "";
	private String password2 = "";
	private String email = "";
	private Hashtable errors = new Hashtable();
	
	public void setName(String name)
	{
		this.name = name;
	}
	public String getName()
	{
		return this.name;
	}
	
	public void setPassword1(String password1)
	{
		this.password1 = password1;
	}
	public String getPassword1()
	{
		return this.password1;
	}
	
	public void setPassword2(String password2)
	{
		this.password2 = password2;
	}
	public String getPassword2()
	{
		return this.password2;
	}
	
	public void setEmail(String email)
	{
		this.email = email;
	}
	public String getEmail()
	{
		return this.email;
	}
	
	public boolean validate()
	{
		boolean allOk = true;
		if(name.trim().equals(""))
		{
			errors.put("name","Please input your name.");
			allOk = false;
		}
		if(password1.length()>10 || password1.length()<6)
		{
			errors.put("password1","password must have 6-10 characters.");
			allOk = false;
		}
		if(!password2.equals(password1))
		{
			errors.put("password2","passwords do not match.");
			allOk = false;
		}
		/*对email格式的校验采用了正则表达式，关于正则表达式的技术细节，
		请参看笔者编写的《JavaScript网页开发》一书*/
		if(!email.matches("[a-zA-Z0-9_-]+@[a-zA-Z0-9_-]+(\\.[a-zA-Z0-9_-]+)+"))
		{
			errors.put("email","illegal email.");
			allOk = false;			
		}
		return allOk;
	}
	
	public void setErrorMsg(String err,String errMsg)
	{
		if((err != null) && (errMsg != null))
		{
			errors.put(err,errMsg);
		}
	}
	
	public String getErrorMsg(String err)
	{
		String err_msg = (String)errors.get(err);
		return (err_msg == null) ? "" : err_msg;
	}
}