Struts2框架使用(九)之struts2的驗證框架
阿新 • • 發佈：2017-12-21
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Struts2 驗證簡介
Struts2 基於 Struts2 攔截器，為開發者提供了一套易用的驗證框架，並可擴展；一般的驗證都支持；
Struts2 內置驗證
struts2內置的驗證器
第三節 ：自定義驗證
Struts2 基於 Struts2 攔截器，為開發者提供了一套易用的驗證框架，並可擴展；一般的驗證都支持，下面，將以一個註冊的例子來舉例：
首先創建一個pojo類
package com.mrlv.pojo; public class User { private String userName; private String name; privateint 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 + "]"; } }
然後。創建一個jsp表單，註意：這裏的<s:actionerror/>是顯示驗證表達式錯誤提示。
<%@ 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/> 用戶註冊 <s:form action="/registerAction" method="post"> <s:textfield name="user.userName" label="用戶名"></s:textfield> <s:textfield name="user.name" label="真實姓名"></s:textfield> <s:textfield name="user.age" label="年齡"></s:textfield> <s:textfield name="user.email" label="郵件"></s:textfield> <s:textfield name="user.homePage" label="主頁"></s:textfield> <s:submit value="註冊"></s:submit> </s:form> </body> </html>
然後，創建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("執行RegisterAction，接收："+user); return SUCCESS; } }
如果想調用內部驗證框架則，需要在Action同一個包內下創建RegisterAction-validation.xml，名字要求有規範。
<?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"> <!-- 這裏是錯誤返回提示語 --> <message>請輸入用戶名</message> </field-validator> <field-validator type="stringlength"> <param name="minLength">6</param> <param name="maxLength">10</param> <message>用戶名必須在${minLength}和${maxLength}之間</message> </field-validator> </field> <field name="user.name"> <field-validator type="requiredstring"> <message>請輸入姓名</message> </field-validator> </field> <field name="user.age"> <field-validator type="int"> <param name="min">18</param> <message>年齡必須滿18周歲</message> </field-validator> </field> <field name="user.email"> <field-validator type="requiredstring"> <message>請輸入郵件</message> </field-validator> <field-validator type="email"> <message>郵件格式不對</message> </field-validator> </field> <field name="user.homePage"> <field-validator type="requiredstring"> <message>請輸入主頁</message> </field-validator> <field-validator type="url"> <message>主頁格式不對</message> </field-validator> </field> <!-- 這裏是表達式驗證 --> <validator type="expression"> <param name="expression"><![CDATA[!user.name.equals(user.userName)]]></param> <message>用戶名和真實姓名不能相同</message> </validator> </validators>
最後配置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"> <!-- 這裏input是錯誤後返回的頁面 --> <result name="input">/register.jsp</result> <result name="success">/success.jsp</result> </action> </package> </struts>
自定義驗證器
如果你需要添加一些自定義的驗證器的話，可以創建一個驗證器，如下。
package com.mrlv.validators; import com.opensymphony.xwork2.validator.ValidationException; import com.opensymphony.xwork2.validator.validators.FieldValidatorSupport; /** * 自定義校驗器 */ 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); } } //判斷傳入字符是否含有敏感字符 public boolean check(String value){ String sensitiveWords[]={"操","你媽"}; for(int i=0;i<sensitiveWords.length;i++){ if(value.indexOf(sensitiveWords[i])>-1){ return false; } } return true; } }
接下來就是把這個驗證器配置到配置文件裏，接下來需要在src文件夾下創建一個validators.xml文件
註意：這裏是必須規定名字。
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"/> <!-- 添加新增的驗證器 --> <validator name="sensitive" class="com.mrlv.validators.SensitiveWordValidators"/> </validators>
調用的時候，只需要在action包內調用的***Action下創建***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>有敏感詞匯</message> </field-validator> </field> </validators>
以上便是struts的校驗框架。
Struts2框架使用(九)之struts2的驗證框架