又是驗(yàn)證功能。。。現(xiàn)在似乎很怕這個(gè)功能。。以前學(xué)struts1時(shí)。。其實(shí)很簡(jiǎn)單的驗(yàn)證模塊花了我不少的時(shí)間。。現(xiàn)在學(xué)struts2也是一樣。。花了一個(gè)下午的時(shí)間才把struts2客戶(hù)端驗(yàn)證搞定。。
   在上篇中實(shí)現(xiàn)了服務(wù)端驗(yàn)證后。。要實(shí)現(xiàn)客戶(hù)端驗(yàn)證就很簡(jiǎn)單。。。只要在form元素上加上validate=true就行。。另外，我也加入了國(guó)際化支持。

先說(shuō)說(shuō)遇到的問(wèn)題
    1.在<s:form>中把a(bǔ)ction的屬性寫(xiě)在action="regist.action"，導(dǎo)致struts2沒(méi)有進(jìn)行客戶(hù)端驗(yàn)證，就是提交給服務(wù)端處理了。。正確應(yīng)該是action="register".不要加.action .. 這個(gè)問(wèn)題花了我大半個(gè)下午才找出。。
    2.因?yàn)閼卸璋?lt;s:textfield name="username" label="用戶(hù)名"/>就寫(xiě)在<s:textfield name="username" />沒(méi)有加上label屬性。。。運(yùn)行時(shí)就不停地彈出Object error對(duì)話(huà)框。。。
    3.短路屬性short-circuit=true目錄只支持服務(wù)端驗(yàn)證。。還不支持客戶(hù)端。。。。所以不要驚訝在客戶(hù)提交時(shí)同一個(gè)域出現(xiàn)不止一條的提示信息。

代碼如下：
   1.注冊(cè)頁(yè)面register.jsp
   

<%@ page contentType="text/html; charset=GBK" language="java" %>
<%@ taglib prefix="s" uri="/struts-tags"%>
<html>
<head>
<title>register</title>
</head>
<body>
<s:form action="regist" validate="true">
<s:textfield name="username" label="用戶(hù)名"/>
<s:textfield name="pass" label="密碼"/>
<s:textfield name="age" label="年齡"/>
<s:textfield name="birthday" label="生日"/>
<s:submit/>
</s:form>
</body>
</html>

2.ReigsterAction.java
package my;
import com.opensymphony.xwork2.ActionSupport;
import java.util.Date;
public class RegisterAction extends ActionSupport
{
    private String name;
    private String pass;
    private int age;
    private Date birthday;
    public void setName(String username)
    {
        this.name = username;
    }
    public String getName()
    {
        return this.name;
    }

    public void setPass(String pass)
    {
        this.pass = pass;
    }
    public String getPass()
    {
        return this.pass;
    }
    public void setAge(int age)
    {
        this.age = age;
    }
    public int getAge()
    {
        return this.age;
    }
    public void setBirthday(Date birthday)
    {
        this.birthday = birthday;
    }
    public Date getBirthday()
    {
        return this.birthday;
    }
    public String execute()throws Exception 
    {
        return SUCCESS;
    }
}
3.驗(yàn)證文件(RegisterAction-validation.xml)
<?xml version="1.0" encoding="GBK"?>
<!DOCTYPE validators PUBLIC "-//OpenSymphony Group//XWork Validator 1.0.2//EN"
    "http://www.opensymphony.com/xwork/xwork-validator-1.0.2.dtd">
    <validators>
        <field name="username" >
            <field-validator type="requiredstring" short-circuit="true">
                <param name="trim">true</param>
                <message>${getText("username.required")}</message> 
            </field-validator>
            <field-validator type="regex">
                <param name="expression"><![CDATA[(\w{4,25})]]></param>
                <message>${getText("username.regex")}</message> 
            </field-validator>
        </field>

        <field name="pass">
            <field-validator type="requiredstring" short-circuit="true">
                <param name="trim">true</param>
                <message>${getText("pass.required")}</message> 
            </field-validator>
            <field-validator type="regex">
                <param name="expression"><![CDATA[(\w{4,25})]]></param>
                <message>${getText("pass.regex")}</message> 
            </field-validator>
        </field>
        <field name="age">
            <field-validator type="int">
                <param name="min">1</param>
                <param name="max">100</param>
                <message>${getText("age.range")}</message>
            </field-validator>
        </field>
        <field name="birthday">
            <field-validator type="date">
                <param name="min">1900-01-01</param>
                <param name="max">2050-01-01</param>
            <message>${getText("birthday.range")}</message> 
            </field-validator>
        </field>
    </validators>

4.Struts2的配置文件struts.xml
<?xml version="1.0" encoding="GBK"?>
<!DOCTYPE struts PUBLIC
        "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
        "http://struts.apache.org/dtds/struts-2.0.dtd">
        <struts>
            <constant name="struts.custom.i18n.resources" value="globalMessage"/>
            <package name="my" extends="struts-default">
            <action name="regist" class="my.RegisterAction">
                <result name="success">/show.jsp</result>
                <result name="input">/register.jsp</result>
            </action>
            </package>
        </struts>
 5.國(guó)際化支持文件globalMessage_zh_CN.properties(用native2ascii生成的)
username.required=\u4f60\u5fc5\u987b\u8f93\u5165\u7528\u6237\u540d
username.regex=\u4f60\u8f93\u5165\u7684\u7528\u6237\u540d\u53ea\u80fd\u662f\u5b57\u6bcd\u4e0e\u6570\u5b57\uff0c\u4e14\u957f\u5ea6\u5fc5\u987b\u57284\u81f325\u4e4b\u9593
pass.required=\u4f60\u5fc5\u987b\u8f93\u5165\u5bc6\u7801
pass.regex=\u4f60\u8f93\u5165\u7684\u5bc6\u7801\u53ea\u80fd\u662f\u5b57\u6bcd\u4e0e\u6570\u5b57\uff0c\u4e14\u957f\u5ea6\u5fc5\u987b\u57284\u81f325\u4e4b\u9593
age.range=\u4f60\u7684\u5e74\u9f84\u5fc5\u987b\u5728${min}\u548c${max}\u4e4b\u9593
birthday.range=\u4f60\u7684\u751f\u65e5\u5fc5\u987b\u5728${min}\u548c${max}\u4e4b\u95f4

xwork.default.invalid.fieldvalue={0}\u5b57\u6bb5\u65e0\u6548
6.注冊(cè)成功頁(yè)面show.jsp
<%@ page language="java" contentType="text/html; charset=GBK"%>
<%@taglib prefix="s" uri="/struts-tags"%>

<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=GBK"/>
<title>校驗(yàn)成功</title>
</head>
<body>
<H3>校驗(yàn)成功</H3>
用戶(hù)名：<s:property value="username"/><br>
密碼：<s:property value="pass"/><br>
年齡：<s:property value="age"/><br>
生日：<s:property value="birthday"/><br>
</body>
</html>