Struts2（5）：Struts2的输入校验-优快云博客

本文链接：https://blog.youkuaiyun.com/iteye_9280/article/details/82067741

1，Register.jsp，一个注册页面，包括用户名，密码，确认密码，年龄，生日，毕业时间这六个信息。

<%@ page language="java" import="java.util.*" pageEncoding="ISO-8859-1"%>
<%@ taglib prefix="s" uri="/struts-tags"%>
<html>
  <body>
  <table align="center" width="40%">
  	<tr>
  		<td style="color:red"><s:fielderror></s:fielderror></td>
  	</tr>
  </table>
  	<s:form action="register" theme="simple">
  	<table align="center" width="40%">
	    <tr>
	    	<td>username:</td>
	    	<td><s:textfield name="username"></s:textfield></td>
	    </tr>
	    <tr>
	    	<td>password:</td>
	    	<td><s:password name="password"></s:password></td>
	    </tr>
	    <tr>
	    	<td>re-password:</td>
	    	<td><s:password name="repassword"></s:password></td>
	    </tr>
	    <tr>
	    	<td>age:</td>
	    	<td><s:textfield name="age"></s:textfield></td>
	    </tr>
	    <tr>
	    	<td>birthday:</td>
	    	<td><s:textfield name="birthday"></s:textfield></td>
	    </tr>
	    <tr>
	    	<td>graduation:</td>
	    	<td><s:textfield name="graduation"></s:textfield></td>
	    </tr>
	    <tr>
	    	<td><s:submit></s:submit></td>
	    	<td><s:reset></s:reset></td>
	    </tr>
    </table>
  </s:form>
  </body>
</html>

2，RegisterAction.java，在validate方法中进行输入校验

package com.test.action;

import java.sql.Date;
import java.util.Calendar;
import com.opensymphony.xwork2.ActionSupport;

public class RegisterAction extends ActionSupport {
	private String username;
	private String password;
	private String repassword;
	private int age;
	private Date birthday;
	private Date graduation;
	
	public String getUsername() {
		return username;
	}
	public void setUsername(String username) {
		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;
	}
	public Date getGraduation() {
		return graduation;
	}
	public void setGraduation(Date graduation) {
		this.graduation = graduation;
	}
	
	public void validate() {
		//年龄不能小于0
		if(age < 0){ 
			this.addFieldError("age", "your age is error");
		}
		//用户名不能为空
		if(null == username || username.equals("")){ 
			this.addFieldError("username", "please input your username");
		}
		//密码不能为空，且两次输入的密码必须相同
		if(null == password || null == repassword || !password.equals(repassword)){
			this.addFieldError("password", "your password is invalid");
		}
		//生日与毕业时间不能为空，且毕业时间不能早于生日
		if(null != birthday && null != graduation){
			Calendar c1 =Calendar.getInstance();
			c1.setTime(birthday);
			Calendar c2 =Calendar.getInstance();
			c2.setTime(graduation);
			if(c1.after(c2)){
				this.addFieldError("birthday", "birthday should be before graduation");
			}
		}
	}
}

3，struts.xml配置

<action name="register" class="com.test.action.RegisterAction">
	<result name="success">/success.jsp</result>
	<result name="input">/register.jsp</result>
</action>

4，输入成功后的显示页面

<%@ page language="java" import="java.util.*" pageEncoding="ISO-8859-1"%>
<%@ taglib prefix="s" uri="/struts-tags" %>
<html>
  <body>
    <table align="center" width="40%">
	    <tr>
	    	<td>username:</td>
	    	<td>${requestScope.username}</td>
	    </tr>
	    <tr>
	    	<td>password:</td>
	    	<td>${requestScope.password}</td>
	    </tr>
	    <tr>
	    	<td>age:</td>
	    	<td>${requestScope.age}</td>
	    </tr>
	    <tr>
	    	<td>birthday:</td>
	    	<td>${requestScope.birthday} </td>
	    </tr>
	    <tr>
	    	<td>graduation:</td>
	    	<td>${requestScope.graduation} </td>
	    </tr>
	    <tr>
	    	<td><input type="submit" name="submit"> </td>
	    	<td><input type="reset" name="reset"> </td>
	    </tr>
    </table>
  </body>
</html>