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Struts2的输入校验(2)——客户端校验

Struts2的输入校验(2)

      ——客户端校验

Struts2客户端校验的使用:

  (1)使用Struts2的标签生成输入页面的表单;

  (2)为该<s:form>元素添加validate="true"属性

示例:

(1)第一个输入页面:

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%@ taglib prefix="s" uri="/struts-tags" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>注册 - 1</title>
</head>
<body>
<s:form action="regist_1">
    <s:textfield name="username" key="用户名"/>
    <s:password name="password" key="密码"/>
    <s:textfield name="age" key="年龄"/>
    <s:textfield name="birth" key="生日"/>
    <tr>
        <td rowspan="1">
            <s:reset value="重置" theme="simple"/>
            <s:submit value="注册" theme="simple"/>
        </td>
    </tr>
</s:form>
</body>
</html>

(2)返回的重新输入页面:

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%@ taglib prefix="s" uri="/struts-tags"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
<s:fielderror/>
<s:form action="regist_1" validate="true">
    <s:textfield name="username" key="用户名"/>
    <s:password name="password" key="密码"/>
    <s:textfield name="age" key="年龄"/>
    <s:textfield name="birth" key="生日"/>
    <tr>
        <td rowspan="1">
            <s:reset value="重置" theme="simple"/>
            <s:submit value="注册" theme="simple"/>
        </td>
    </tr>
</s:form>
</body>
</html>

 

(3)Action类:

import java.util.Date;

import com.opensymphony.xwork2.ActionSupport;

public class Regist1Action extends ActionSupport{
    //封装请求参数
    private String username;
    private String password;
    private int age;
    private Date birth;
    //setter、getter方法
    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 int getAge() {
        return age;
    }
    public void setAge(int age) {
        this.age = age;
    }
    public Date getBirth() {
        return birth;
    }
    public void setBirth(Date birth) {
        this.birth = birth;
    }
    //处理逻辑使用ActionSupport基类的默认方法
}

 

(4)校验规则的配置文件:

<?xml version="1.0" encoding="UTF-8"?>
<!-- 指定校验配置文件的DTD信息 -->
<!DOCTYPE validators PUBLIC
        "-//Apache Struts//XWork Validator 1.0.2//EN"
        "http://struts.apache.org/dtds/xwork-validator-1.0.2.dtd">
<!-- 校验文件的根元素 -->
<validators>
    <!-- 校验Action的username属性 -->
    <field name="username">
        <field-validator type="requiredstring">
            <param name="trim">true</param>
            <message>必须输入用户名</message>
        </field-validator>
        <field-validator type="regex">
            <param name="regex"><![CDATA[(\w(4,25))]]></param>
            <message>输入的用户名必须是字母和数字,且长度在4-25之间</message>
        </field-validator>
    </field>
    <!-- 校验Action的password属性 -->
    <field name="password">
        <field-validator type="requiredstring">
            <param name="trim">true</param>
            <message>必须输入密码</message>
        </field-validator>
        <field-validator type="regex">
            <param name="regex"><![CDATA[(\w(4,25))]]></param>
            <message>输入的密码必须是字母和数字,且长度在4-25之间</message>
        </field-validator>
    </field>
    <!-- 校验Action的age属性 -->
    <field name="age">
        <field-validator type="int">
            <param name="min">1</param>
            <param name="max">150</param>
            <message>年纪必须在1-150之间</message>
        </field-validator>
    </field>
    <!-- 校验Action的birth属性 -->
    <field name="birth">
        <field-validator type="date">
            <param name="min">1900-01-01</param>
            <param name="max">2050-01-01</param>
            <message>输入的生日必须在${min}到${max}之间</message>
        </field-validator>
    </field>
</validators>

 

(5)注意事项:

  浏览者不能直接访问使用客户端校验的表单页。可以把启用客户端校验的表单页放在WEB-INF路径下,让浏览者访问所有资源前都经过它的核心Filter。

 

Struts2的输入校验(2)——客户端校验