struts2学习(12)struts2验证框架2.自定义验证

一、例子需求：

对敏感词进行验证；

将struts包中的validators.xml文件拷贝一份到src目录下，在最后面添加自己的验证器；

com.cy.validators.SensitiveWordValidators.java:

package com.cy.validators;

import com.opensymphony.xwork2.validator.ValidationException;
import com.opensymphony.xwork2.validator.validators.FieldValidatorSupport;

public class SensitiveWordValidators extends FieldValidatorSupport{

    public void validate(Object obj) throws ValidationException {
        String fidleName = this.getFieldName();　　//获取输入的控件input的name
        String value = this.getFieldValue(fidleName, obj).toString();  //获取该input的值
        if(!check(value)){
            this.addFieldError(fidleName, obj);
        }
    }

    public boolean check(String value){
        String sensitiveWords[] = {"操", "你妈"};
        for(int i=0; i<sensitiveWords.length; i++){
            if(value.indexOf(sensitiveWords[i]) > -1) {
                return false;
            }
        }
        return true;
    }

}

src目录下validators.xml:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE validators PUBLIC
        "-//Apache Struts//XWork Validator Config 1.0//EN"
        "http://struts.apache.org/dtds/xwork-validator-config-1.0.dtd">
<validators>
    <validator name="required" class="com.opensymphony.xwork2.validator.validators.RequiredFieldValidator"/>
    <validator name="requiredstring" class="com.opensymphony.xwork2.validator.validators.RequiredStringValidator"/>
    <validator name="int" class="com.opensymphony.xwork2.validator.validators.IntRangeFieldValidator"/>
    <validator name="double" class="com.opensymphony.xwork2.validator.validators.DoubleRangeFieldValidator"/>
    <validator name="date" class="com.opensymphony.xwork2.validator.validators.DateRangeFieldValidator"/>
    <validator name="expression" class="com.opensymphony.xwork2.validator.validators.ExpressionValidator"/>
    <validator name="fieldexpression" class="com.opensymphony.xwork2.validator.validators.FieldExpressionValidator"/>
    <validator name="email" class="com.opensymphony.xwork2.validator.validators.EmailValidator"/>
    <validator name="url" class="com.opensymphony.xwork2.validator.validators.URLValidator"/>
    <validator name="visitor" class="com.opensymphony.xwork2.validator.validators.VisitorFieldValidator"/>
    <validator name="conversion" class="com.opensymphony.xwork2.validator.validators.ConversionErrorFieldValidator"/>
    <validator name="stringlength" class="com.opensymphony.xwork2.validator.validators.StringLengthFieldValidator"/>
    <validator name="regex" class="com.opensymphony.xwork2.validator.validators.RegexFieldValidator"/>
    <validator name="conditionalvisitor" class="com.opensymphony.xwork2.validator.validators.ConditionalVisitorFieldValidator"/>

    <!-- 自定义的一条验证规格，用来验证敏感词汇 -->
    <validator name="sensitive" class="com.cy.validators.SensitiveWordValidators"></validator>
</validators>

ValidationAction.java:

package com.cy.action;

import com.opensymphony.xwork2.ActionSupport;

public class ValidationAction extends ActionSupport{
    private static final long serialVersionUID = 1L;
    private String name;

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    @Override
    public String execute() throws Exception {
        System.out.println("传入的用户名:" + name);
        return SUCCESS;
    }

}

ValidationAction-validation.xml:

<?xml version="1.0" encoding="UTF-8"?>
<!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="name">
        <field-validator type="requiredstring">
            <message>请输入姓名</message>
        </field-validator>
        <field-validator type="sensitive">
            <message>有敏感词汇</message>
        </field-validator>
    </field>
</validators>

struts.xml中对ValidationAction的配置：

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC
    "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
    "http://struts.apache.org/dtds/struts-2.0.dtd">

<struts>

    <package name="manage" extends="struts-default">
        <action name="registerAction" class="com.cy.action.RegisterAction">
            <result name="input">register.jsp</result>
            <result name="success">success.jsp</result>
        </action>

        <action name="validationAction" class="com.cy.action.ValidationAction">
            <result name="input">validation.jsp</result>
            <result name="success">success.jsp</result>
        </action>
    </package>

</struts>

validation.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>
    简单自定义验证
    <s:form action="/validationAction" method="post">
        <s:textfield name="name" label="姓名"></s:textfield>
        <s:submit value="提交"></s:submit>
    </s:form>
</body>
</html>

测试结果：

输入带有定义好的含有敏感词汇的词，提交失败。