Struts2_基于XML配置方式实现对action的所有方法进行校验

Bertha 。 2022-06-15 00:40 110阅读 0赞

基于XML配置方式实现对action的所有方法进行校验：

使用基于XML配置方江苏实现输入校验时,Action也需要继承ActionSupport,并且提供校验文件,校验文件
    	和action类放在同一个包下,文件的取名格式为:ActionClassName-validation.xml,其中ActionClassName
    	为action的简单类名,-validation为固定写法。如果Action类为cn.itcast.UserAction,那么该文件的取名应为:
    	UserAction-validation.xml。下面是校验文件的模板:
    	<!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="username">
    			<field-validator type="requiredstring">
    				<param name="trim">true</param>
    				<message key="用户名不能为空" />
    			</field-validator>
    		</field>
    	</validators>
    	<field>指定action中要交验的属性,<field-validator>指定校验器,上面指定的校验器requiredstring是由系统提供的,系统
    	提供了能满足大部分验证需求的校验器,这些校验器的定义可以在xwork-x.x.jar中的com.opensymphony.xwork2.validator.validators
    	下的default.xml中找到。
    	<message>为校验失败后的提示信息,如果需要国际化,可以为message指定key属性,key的值为资源文件中的key。
    	在这个校验文件中,对action中字符串类型的username属性进行验证,首先要求调用trim()方法去掉空格,然后判断
    	是否为空。
    	
    	注意对于正则表达式不起作用代码进行修改
    		修改：
    			<param name="expression"><![CDATA[(\w{4,25})]]></param>
    			参数名字改为regexExpression了
    			<param name="regexExpression"><![CDATA[(\w{4,25})]]></param>

<?xml version="1.0" encoding="UTF-8" ?>
    <!DOCTYPE struts PUBLIC
    	"-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"
    	"http://struts.apache.org/dtds/struts-2.3.dtd">
    
    <struts>
    	
    	<constant name="struts.i18n.encoding" value="UTF-8" />
    	
    	<constant name="struts.action.extension" value="com,action" />
    	
    	<constant name="struts.configuration.xml.reload" value="true" />
    	
    	
    	<include file="struts_validata.xml"/>
    </struts>

<?xml version="1.0" encoding="UTF-8" ?>
    <!DOCTYPE struts PUBLIC
    	"-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"
    	"http://struts.apache.org/dtds/struts-2.3.dtd">
    
    <struts>
    	<package name="itcast" namespace="/person" extends="struts-default">
    		<action name="list_*" class="cn.itcast.a_action.PersonAction" method="{1}">
    			<result name="input">/index.jsp</result>
    			<result name="message">/WEB-INF/page/message.jsp</result>
    		</action>
    	</package>
    </struts>

<!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="username">
    		<field-validator type="requiredstring">
    			<param name="trim">true</param>
    			<message>用户名不能为空!</message>
    		</field-validator>
    	</field>
    	<field name="mobile">
    		<field-validator type="requiredstring">
    			<param name="trim">true</param>
    			<message>手机号不能为空!</message>
    		</field-validator>
    		<field-validator type="regex">
    			<param name="regexExpression"><![CDATA[^1[358]\d{9}$]]></param>
    			<message>手机号格式不正确</message>
    		</field-validator>
    	</field>
    </validators>

package cn.itcast.a_action;
    
    import java.util.regex.Pattern;
    
    import com.opensymphony.xwork2.ActionContext;
    import com.opensymphony.xwork2.ActionSupport;
    
    public class PersonAction extends ActionSupport {
    	private String username;
    	private String mobile;
    
    	public String getUsername() {
    		return username;
    	}
    
    	public void setUsername(String username) {
    		this.username = username;
    	}
    
    	public String getMobile() {
    		return mobile;
    	}
    
    	public void setMobile(String mobile) {
    		this.mobile = mobile;
    	}
    
    	public String update() {
    		ActionContext.getContext().put("message", "更新成功");
    		return "message";
    	}
    
    	public String save() {
    		ActionContext.getContext().put("message", "保存成功");
    		return "message";
    	}
    
    }

<%@ 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>输入校验</title>
    <meta http-equiv="pragma" content="no-cache">
    <meta http-equiv="cache-control" content="no-cache">
    <meta http-equiv="expires" content="0">
    </head>
    
    <body>
    	<s:fielderror />
    	<form action="<%=request.getContextPath()%>/person/list_save.action"
    		method="post">
    		用户名:<input type="text" name="username">不能为空<br /> 手机号:<input
    			type="text" name="mobile" />不能为空,并且要符合手机号的格式1,3/5/8,后面是9个数字<br /> <input
    			type="submit" value=" 提 交 " />
    	</form>
    </body>
    </html>

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
    
    
    <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
    <html>
    <head>
    
    <title>结果</title>
    
    <meta http-equiv="pragma" content="no-cache">
    <meta http-equiv="cache-control" content="no-cache">
    <meta http-equiv="expires" content="0">
    </head>
    
    <body>
    	${message }
    </body>
    </html>

**注意使用校验时必须要有input视图,网页必须要有<s:fielderror />标签接收input视图**