Structs2 校验框架

代码结构：

使用Struts校验框架，保证输入学生的基本信息：学号、姓名、性别、出生年月、专业、总学分等，要求输入满足以下条件：
(1) 学号前两位大于“13”并且后面4位必须为数字；
(2) 出生年月必须保证年龄大于等于18岁；
(3) 专业不能为空；
(4) 总学分在0-80之间。

---

RegistAction.java

package com.action;
import java.util.*;

import com.bean.User;
import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionSupport;

public class RegistAction extends ActionSupport {
    private User user;
    public User getUser() {
        return user;
    }
    public void setUser(User user) {
        this.user = user;
    }
    public String execute() throws Exception {

        if(hasErrors()){
            return INPUT;
        }
        return SUCCESS;
    }
    public void validate(){
        Calendar cal = Calendar.getInstance();
        String[] str = user.getBir().split("-");

        int yearNow = cal.get(Calendar.YEAR);
        int monthNow = cal.get(Calendar.MONTH)+1;
        int dayNow = cal.get(Calendar.DAY_OF_MONTH);

        int yearBirth=Integer.parseInt(str[0]);
        int monthBirth=Integer.parseInt(str[1]);
        int dayBirth=Integer.parseInt(str[2]);

        int age=yearNow-yearBirth;
        if(monthNow<=monthBirth || (monthNow == monthBirth && dayNow < dayBirth)) age--;
        if(age < 18){
            addFieldError("user.bir", "出生年月必须保证年龄大于等于18岁!");//QAQ
        }
    }

}

RegistAction-validation.xml

<?xml version="1.0" encoding="utf-8"?>
 <!DOCTYPE validators PUBLIC
  "-//Apache Struts//XWork Validator 1.0.3//EN"
 "http://struts.apache.org/dtds/xwork-validator-1.0.3.dtd">

<validators>
        <field name="user.id">
           <field-validator type="regex">
              <param name="expression"><![CDATA[(^(1[4-9]|[2-9][0-9]\d).*\d{4}$)]]></param>
              <message>学号前两位大于“13”并且后面4位必须为数字！</message>
           </field-validator> 

           <field-validator type="requiredstring">
              <param name="trim">true</param>
              <message>学号不能为空！</message>
           </field-validator>
         </field> 

       <field name="user.major">
          <field-validator type="requiredstring">
             <param name="trim">true</param>
             <message>专业不能为空！</message>
          </field-validator>
        </field>

        <field name="user.score">
           <field-validator type="required">
                <message>请输入用户考试成绩</message>
           </field-validator>
              <field-validator type="int">
                <param name="min">0</param>
                <param name="max">80</param>
                <message>学分必须在0-80之间！</message>
           </field-validator>
        </field>

</validators>

User.java

package com.bean;
import java.util.Date;
import com.bean.*;
public class User {
    //学号、姓名、性别、出生年月、专业、总学分等
        private String id;
        private String username;
        private String agender;
        private String bir; //生日类/自定义类型转换/将生日的年月取出方便计算年龄
        private int age;
        private String major;
        private int score;
        public String getId() {
            return id;
        }
        public void setId(String id) {
            this.id = id;
        }
        public String getUsername() {
            return username;
        }
        public void setUsername(String username) {
            this.username = username;
        }
        public String getAgender() {
            return agender;
        }
        public void setAgender(String agender) {
            this.agender = agender;
        }
        public String getBir() {
            return bir;
        }
        public void setBir(String bir) {
            this.bir = bir;
        }
        public int getAge() {
            return age;
        }
        public void setAge(int age) {
            this.age = age;
        }
        public String getMajor() {
            return major;
        }
        public void setMajor(String major) {
            this.major = major;
        }
        public int getScore() {
            return score;
        }
        public void setScore(int score) {
            this.score = score;
        }

}

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.1//EN" "http://struts.apache.org/dtds/struts-2.1.dtd">
<struts>
    <package name="default" extends="struts-default">
        <action name="myform" class="com.action.RegistAction">
            <result name="success">/success.jsp</result>
            <result name="input">/index.jsp</result>
        </action>
    </package>
</struts>

index.jsp

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@taglib uri="/struts-tags" prefix="s" %>

<html>
  <head>
    <title>注册页面</title>
<!--     <script type="text/javascript"> -->
<!--      function validateAge(){ -->
<!--          var birthday=$('#user.age').val(); //假设用户输入的是这种格式  birthday="2017-10-11" -->
<!--          var birthday1=birthday.split('-'); -->
<!--          var convert2Date= new Date(birthday1[0],birthday1[1],birthday1[2]);//把字符串转换成日期  -->
<!--         var nowDate=new Date();   //获取当前时间 -->
<!--          //var   year=nowDate.getFullYear();      -->
<!--          //var   month=nowDate.getMonth()+1;      -->
<!--          //var   date=nowDate.getDate();  -->
<!--          //var nowDate=new Date(year,month,date); -->
<!--          var age=nowDate.getTime()-convert2Date.getTime();  //毫秒 -->
<!--          age=age/(24*3600*1000);  //天数  至于转换成多少年(岁)，详细的还要根据是否闰年计算 age/(24*3600*1000*366) 或者 age/(24*3600*1000*365) -->
<!--   } -->
<!--     </script> -->
  </head>
  <body>
    <s:form action="myform" method="post">
          <s:textfield name="user.id" label="学号"></s:textfield>
          <s:textfield name="user.username" label="姓名"></s:textfield>
          <s:radio name="user.agender" list="#{1:'男',0:'女'}" label="性别" value="1"></s:radio>
        <s:textfield name="user.bir" label="生日" placeholder="xxxx-xx-xx"></s:textfield>
<!--         <s:hidden name="user.age" label="年龄"></s:hidden> -->
        <s:textfield name="user.major" label="专业"></s:textfield>
        <s:textfield name="user.score" label="总学分"></s:textfield>
           <s:submit value="提交"></s:submit>
    </s:form>
  </body>
</html>

success.jsp

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@taglib uri="/struts-tags" prefix="s" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <title>成功页面</title>
  </head>

  <body>
      恭喜<s:property value="user.username"/>!您已经注册成功！
  </body>
</html>