Struts2的验证框架简单吗？

Struts2验证框架是基于Struts拦截器开发的，具有良好的扩展性；一般的验证都可以支持。现在我们以一个注册验证的例子进行总结：

新建一个model，User:

 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 + "]";

     }

 }

写RegisterAction.java类：

 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("传入的用户："+user);

         return SUCCESS;

     }

 }

写一下RegisterAction的验证框架：

RegisterAction-validation.xml validation.xml文件名要注意和Action名一样!

 <?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">

             <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>

 //验证表达式

     <validator type="expression">

         <param name="expression"><![CDATA[!user.name.equal(user.userName)]]></param>

         <message>用户名和真实姓名不能相同！</message>

     </validator>

 </validators>

在struts.xml中配置：

 <struts>

     <package name="manager" extends="struts-default">

         <action name="registerAction" class="com.java1234.action.RegisterAction">

             <result name="input">/register.jsp</result>

             <result name="success">/success.jsp</result>

         </action>

     </package>

 </struts>

注册页面register.jsp:

 <body>

 <s:actionerror/>  //可以将验证表达式的值输出；

 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>

success.jsp页面：

 <body>

 　　注册成功

 </body>

开始验证：

其中struts的默认的Validators：

 <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"/>

     </validators>

现在我们自创建检查敏感词汇的验证器ValidationAction:

 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("姓名："+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>

Validators配置：

 <?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>

设置验证器SensitiveWordValidators：

 public class SensitiveWordValidators extends FieldValidatorSupport{

     @Override

     public void validate(Object object) throws ValidationException {

         // TODO Auto-generated method stub

         //获取输入的用户字段

         String fieldName=this.getFieldName();

         String value=this.getFieldValue(fieldName, object).toString();

         if(!check(value)){

             this.addFieldError(fieldName, object);

         }

     }

     public boolean check(String value){

         String sensitive[]={"王八","tmd","md"};

         for(int i=0;i<sensitive.length;i++){

                 if(value.indexOf(sensitive[i])>-1){

                     return false;

                 }

         }

         return true;

     }

 }

在validators.xml中加入：

 <validator name="sensitive" class="com.java1234.Validators.SensitiveWordValidators"/>

配置struts.xml：

 <struts>

     <package name="manager" extends="struts-default">

         <action name="validationAction" class="com.java1234.action.ValidationAction">

             <result name="input">/validation.jsp</result>

             <result name="success">/success.jsp</result>

         </action>

     </package>

 </struts>

创建validation.jsp文件：

 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>

验证结果：

巴特西

Struts2的验证框架简单吗？

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