分类： 系统运维
2012-01-20 14:19:05
首先需要struts2标签<%@taglib prefix = "s" uri = "/struts-tags" %>
有两种用于校验的错误提示标签：
register.jsp
<%@ page language="java" pageEncoding="gbk"%>
<%@taglib prefix = "s" uri = "/struts-tags" %>
<html>
<body>
<s:actionerror/>
----------------
<s:fielderror cssStyle = "color:blue">s:fielderror>
<s:form action = "register" >
<s:textfield name = "username" label = "username">s:textfield>
<s:password name = "password" label = "password">s:password>
<s:password name = "repassword" label = "repassword">s:password>
<s:textfield name = "birthday" label = "birthday">s:textfield>
<s:textfield name = "graduation" label = "graduation">s:textfield>
<s:submit value = "submit">s:submit>
s:form>
body>
html>
说明：validate()方法在execute()方法之前执行（不论编码位置谁前谁后）。
struts2.xml部分：
<action name = "register" class = "com.shengsiyuan.struts2.RegisterAction">
<result name = "SUCCESS">/registerResult.jspresult>
<result name = "input">/register.jspresult>
action>
说明：ActionSupport类中有：public static final String INPUT = “input” ;(如果输入不合法，则自动跳转到input页面再次输入。通常跳转回用户原先输入信息的页面)
若未设置 <result name = "input">/register.jspresult>，则会出现如图：
RegisterAction.java
package com.shengsiyuan.struts2;
import java.util.Calendar;
import java.util.Date;
import com.opensymphony.xwork2.ActionSupport;
import com.sun.faces.taglib.html_basic.GraphicImageTag;
public class RegisterAction extends ActionSupport
{
private String username ;
private String password ;
private String repassword ;
private int age ;
private Date birthday ;
private Date graduate ;
public Date getGraduate()
{
return graduate;
}
public void setGraduate(Date graduate)
{
this.graduate = graduate;
}
public String getUsername()
{
return username;
}
public void setUsername(String username)
{
System.out.println("00");
this.username = username;
}
public String getPassword()
{
return password;
}
public void setPassword(String password)
{
this.password = password;
}
public String getRepassword()
{
return repassword;
}
public void setRepassword(String repassword)
{
this.repassword = repassword;
}
public int getAge()
{
return age;
}
public void setAge(int age)
{
this.age = age;
}
public Date getBirthday()
{
return birthday;
}
public void setBirthday(Date birthday)
{
this.birthday = birthday;
}
@Override
public String execute() throws Exception
{
return "SUCCESS" ;
}
public void validate()
{
if(null == username || username.length() < 4 || username.length() >6)//取不合法的情况进行处理
{
this.addActionError("username invalid") ;
this.addFieldError("username", "username invalid in field") ;
}
if(null == password || password.length() <4 || password.length() >6 )
{
this.addActionError("password invalid") ;
}
else if(null == repassword ||repassword.length() <4 ||repassword.length() >6)
{
this.addActionError("repassword invalid") ;
}
else if(!password.equals(repassword))
{
this.addActionError("2ci buyi zhi") ;
}
if(age < 10 || age >50)
{
this.addActionError("age is not..") ;
}
if(null == birthday)
{
this.addActionError("birthday..") ;
}
if(null == graduate)
{
this.addActionError("graduate...") ;
}
if(null != birthday && null !=graduate)
{
Calendar c1 = Calendar.getInstance() ;
c1.setTime(birthday) ;
Calendar c2 = Calendar.getInstance() ;
c2.setTime(graduate) ;
if(!c1.before(c2)) //正确的取反，即找错误的
{
this.addActionError("birthday...") ;
}
}
}
}
struts2.xml
<result name = "SUCCESS">/registerResult.jspresult>
registerResult.jsp
<%@ page language="java" pageEncoding="ISO-8859-1"%>
<%@taglib prefix = "s" uri = "/struts-tags" %>
<html>
<body>
username :<s:property value = "username" /><br>
password :<s:property value = "password" /><br>
age<s:property value = "age" /><br>
birthday:<s:property value = "birthday" /><br>
graduate:<s:property value = "graduate" />
body>
html>
