Struts2 验证简介
Struts2 基于 Struts2 拦截器，为开发者提供了一套易用的验证框架，并可扩展；一般的验证都支持；
Struts2 内置验证
struts2内置的验证器
第三节 ：自定义验证
Struts2 基于 Struts2 拦截器，为开发者提供了一套易用的验证框架，并可扩展；一般的验证都支持，下面，将以一个注册的例子来举例：
首先创建一个pojo类
package com.mrlv.pojo; public class User { private String userName; private String name; private int age; private String email; private String homePage; public String getUserName() { return userName; } public void setUserName(String userName) { this.userName = userName; } public String getName() { return name; } public void setName(String name) { this.name = name; } public int getAge() { return age; } public void setAge(int age) { this.age = age; } public String getEmail() { return email; } public void setEmail(String email) { this.email = email; } public String getHomePage() { return homePage; } public void setHomePage(String homePage) { this.homePage = homePage; } @Override public String toString() { return "User [userName=" + userName + ", name=" + name + ", age=" + age + ", email=" + email + ", homePage=" + homePage + "]"; } }
然后。创建一个jsp表单，注意：这里的<s:actionerror/>是显示验证表达式错误提示。
<%@ 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:actionerror/> 用户注册 <s:form action="/registerAction" method="post"> <s:textfield name="user.userName" label="用户名"></s:textfield> <s:textfield name="user.name" label="真实姓名"></s:textfield> <s:textfield name="user.age" label="年龄"></s:textfield> <s:textfield name="user.email" label="邮件"></s:textfield> <s:textfield name="user.homePage" label="主页"></s:textfield> <s:submit value="注册"></s:submit> </s:form> </body> </html>
然后，创建RegisterAction。
package com.mrlv.action; import com.mrlv.pojo.User; import com.opensymphony.xwork2.ActionSupport; public class RegisterAction extends ActionSupport{ /** * */ private static final long serialVersionUID = 1L; private User user; public User getUser() { return user; } public void setUser(User user) { this.user = user; } @Override public String execute() throws Exception { System.out.println("执行RegisterAction，接收："+user); return SUCCESS; } }
如果想调用内部验证框架则，需要在Action同一个包内下创建RegisterAction-validation.xml，名字要求有规范。
<?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="user.userName"> <field-validator type="requiredstring"> <!-- 这里是错误返回提示语 --> <message>请输入用户名</message> </field-validator> <field-validator type="stringlength"> <param name="minLength">6</param> <param name="maxLength">10</param> <message>用户名必须在${minLength}和${maxLength}之间</message> </field-validator> </field> <field name="user.name"> <field-validator type="requiredstring"> <message>请输入姓名</message> </field-validator> </field> <field name="user.age"> <field-validator type="int"> <param name="min">18</param> <message>年龄必须满18周岁</message> </field-validator> </field> <field name="user.email"> <field-validator type="requiredstring"> <message>请输入邮件</message> </field-validator> <field-validator type="email"> <message>邮件格式不对</message> </field-validator> </field> <field name="user.homePage"> <field-validator type="requiredstring"> <message>请输入主页</message> </field-validator> <field-validator type="url"> <message>主页格式不对</message> </field-validator> </field> <!-- 这里是表达式验证 --> <validator type="expression"> <param name="expression"><![CDATA[!user.name.equals(user.userName)]]></param> <message>用户名和真实姓名不能相同</message> </validator> </validators>
最后配置struts.xml。
<?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="manager" extends="struts-default"> <action name="registerAction" class="com.mrlv.action.RegisterAction"> <!-- 这里input是错误后返回的页面 --> <result name="input">/register.jsp</result> <result name="success">/success.jsp</result> </action> </package> </struts>
自定义验证器
如果你需要添加一些自定义的验证器的话，可以创建一个验证器，如下。
package com.mrlv.validators; import com.opensymphony.xwork2.validator.ValidationException; import com.opensymphony.xwork2.validator.validators.FieldValidatorSupport; /** * 自定义校验器 */ public class SensitiveWordValidators extends FieldValidatorSupport{ @Override public void validate(Object object) throws ValidationException { String fieldName=this.getFieldName(); String value=this.getFieldValue(fieldName, object).toString(); //如果含有敏感字符 if(!check(value)){ this.addFieldError(fieldName, object); } } //判断传入字符是否含有敏感字符 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; } }
接下来就是把这个验证器配置到配置文件里，接下来需要在src文件夹下创建一个validators.xml文件
注意：这里是必须规定名字。
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"/> <!-- 添加新增的验证器 --> <validator name="sensitive" class="com.mrlv.validators.SensitiveWordValidators"/> </validators>
调用的时候，只需要在action包内调用的***Action下创建***Action-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-validator type="sensitive"> <message>有敏感词汇</message> </field-validator> </field> </validators>
以上便是struts的校验框架。