如何自定义验证器？

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当struts2 为我们提供的15个验证器不能满足我们的验证要求时，我们就要自定义验证器了？

如何自定义验证器呢？

我们可以按照下面的步骤，就可以自定义验证器了！

具体的实施：以 18位身份证验证器为例，步骤如下：

示例如下：

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项目结构

类

验证器支持类 IDCard.java

自定义验证器：IDCardValidate.java

package com.baidu.IdCard;import com.opensymphony.xwork2.validator.ValidationException;import com.opensymphony.xwork2.validator.validators.FieldValidatorSupport;public class IDCardValidate extends FieldValidatorSupport {@Overridepublic void validate(Object object) throws ValidationException {//1. 获取参数String fieldName = getFieldName();Object value = this.getFieldValue(fieldName, object);//2. 验证IDCard idCard = new IDCard();boolean result = idCard.Verify((String)value);//3. 返回验证结果        if (!result) {            addFieldError(fieldName, object);        }}}

Action：IDCardValidationAction.java

package com.baidu.IdCard;import com.opensymphony.xwork2.ActionSupport;public class IDCardValidationAction extends ActionSupport{private static final long serialVersionUID = 1L;private String idCard;public String getIdCard() {return idCard;}public void setIdCard(String idCard) {this.idCard = idCard;}@Overridepublic String execute() throws Exception {return super.execute();}}

配置验证器：IDCardValidationAction-validation.xml

<!DOCTYPE validators PUBLIC        "-//Apache Struts//XWork Validator 1.0.2//EN"        "http://struts.apache.org/dtds/xwork-validator-1.0.2.dtd"><validators>    <field name="idCard">    <field-validator type="idcard">    <message>身份证号码输入错误</message>    </field-validator>    </field></validators>

配置：struts.xml

<?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><!-- 配置全局的国际化资源文件 --><constant name="struts.custom.i18n.resources" value="nihao"></constant><package name="default" namespace="/" extends="struts-default"><action name="testIDCard" class="com.baidu.IdCard.IDCardValidationAction"><result>/success.jsp</result><result name="input">/idcard.jsp</result></action></package></struts>

配置拦截器：validators.xml

<span style="font-size:14px;"><?xml version="1.0" encoding="UTF-8"?><!DOCTYPE validators PUBLIC        "-//Apache Struts//XWork Validator Definition 1.0//EN"        "http://struts.apache.org/dtds/xwork-validator-definition-1.0.dtd"><!-- START SNIPPET: validators-default --><validators>    <validator name="idcard" class="com.baidu.IdCard.IDCardValidate"/>    </validators></span>

页面：

idcard.jsp

<%@ 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:form action="testIDCard"><s:textfield name="idCard" label="IDCard"></s:textfield><s:submit></s:submit></s:form></body></html>

success.jsp

<%@ 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><h3>恭喜你有为青年！</h3></body></html>

效果：

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