如何自定义验证器？
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 {
@Override
public 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;
}
@Override
public 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>
<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：
