（七）Struts2 验证框架

所有的学习我们必须先搭建好Struts2的环境（1、导入对应的jar包，2、web.xml，3、struts.xml）

第一节：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。

第二节：Struts2 内置验证

一，普通字段验证

二，验证表达式：

<s:actionerror/>（在配置信息中最后“用户名和真实姓名不能相同”的话，即表明有error，所以用表达式，在前端页面会有显示）

例子：

struts.xml

 1 <?xml version="1.0" encoding="UTF-8" ?>
 2 <!DOCTYPE struts PUBLIC
 3     "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
 4     "http://struts.apache.org/dtds/struts-2.0.dtd">
 5 
 6 <struts>
 7     
 8     <package name="manager" extends="struts-default">
 9         
10         <action name="registerAction" class="com.wishwzp.action.RegisterAction">
11             <result name="input">/register.jsp</result>
12             <result name="success">/success.jsp</result>
13         </action>
14         
15     </package>
16  
17 </struts>

User.java

 1 package com.wishwzp.model;
 2 
 3 public class User {
 4 
 5     private String userName;//用户名
 6     private String name;//真实姓名
 7     private int age;//年龄
 8     private String email;//邮件
 9     private String homePage;//主页
10     
11     public String getUserName() {
12         return userName;
13     }
14     public void setUserName(String userName) {
15         this.userName = userName;
16     }
17     public String getName() {
18         return name;
19     }
20     public void setName(String name) {
21         this.name = name;
22     }
23     public int getAge() {
24         return age;
25     }
26     public void setAge(int age) {
27         this.age = age;
28     }
29     public String getEmail() {
30         return email;
31     }
32     public void setEmail(String email) {
33         this.email = email;
34     }
35     public String getHomePage() {
36         return homePage;
37     }
38     public void setHomePage(String homePage) {
39         this.homePage = homePage;
40     }
41     @Override
42     public String toString() {
43         return "User [userName=" + userName + ", name=" + name + ", age=" + age
44                 + ", email=" + email + ", homePage=" + homePage + "]";
45     }
46     
47     
48 }

RegisterAction.java

 1 package com.wishwzp.action;
 2 
 3 import com.wishwzp.model.User;
 4 import com.opensymphony.xwork2.ActionSupport;
 5 
 6 public class RegisterAction extends ActionSupport{
 7 
 8     /**
 9      * 
10      */
11     private static final long serialVersionUID = 1L;
12     
13     private User user;
14 
15     public User getUser() {
16         return user;
17     }
18 
19     public void setUser(User user) {
20         this.user = user;
21     }
22 
23     @Override
24     public String execute() throws Exception {
25         System.out.println("传入的用户："+user);
26         return SUCCESS;
27     }
28     
29     
30 
31 }

RegisterAction-validation.xml （这个文件命名规范：XXXX-validation.xml,其中XXXX就是后台action类）

 1 <?xml version="1.0" encoding="UTF-8"?>
 2 <!DOCTYPE validators PUBLIC "-//Apache Struts//XWork Validator 1.0.2//EN" "http://struts.apache.org/dtds/xwork-validator-1.0.2.dtd">
 3 
 4 <validators>
 5 
 6     <!-- 用户名格式验证 -->
 7     <field name="user.userName">
 8         <field-validator type="requiredstring">
 9             <message>请输入用户名</message>
10         </field-validator>
11          <field-validator type="stringlength">
12              <param name="minLength">6</param>
13              <param name="maxLength">10</param>
14             <message>用户名必须在${minLength}和${maxLength}之间</message>
15         </field-validator>
16     </field>
17     
18     <!-- 真实姓名格式验证 -->
19     <field name="user.name">
20         <field-validator type="requiredstring">
21             <message>请输入姓名</message>
22         </field-validator>
23     </field>
24     
25     <!-- 年龄格式验证 -->
26     <field name="user.age">
27         <field-validator type="int">
28             <param name="min">18</param>
29             <message>年龄必须满18周岁</message>
30         </field-validator>
31     </field>
32     
33     <!-- 邮件格式验证 -->
34     <field name="user.email">
35         <field-validator type="requiredstring">
36             <message>请输入邮件</message>
37         </field-validator>
38         <field-validator type="email">
39             <message>邮件格式不对</message>
40         </field-validator>
41     </field>
42     
43     <!-- 主页格式验证 -->
44     <field name="user.homePage">
45         <field-validator type="requiredstring">
46             <message>请输入主页</message>
47         </field-validator>
48         <field-validator type="url">
49             <message>主页格式不对</message>
50         </field-validator>
51     </field>
52     
53     <!-- 用户名和真实姓名不能相同验证 -->
54     <!-- !user.name.equals(user.userName)     用户名和真实姓名不能相等，如果相等就是错误的信息，前端页面会有"<s:actionerror>"表达式显示错误信息 -->
55     <validator type="expression">
56         <param name="expression"><![CDATA[!user.name.equals(user.userName)]]></param>
57         <message>用户名和真实姓名不能相同</message>
58     </validator>
59 </validators>

 1 <%@ page language="java" contentType="text/html; charset=UTF-8"
 2     pageEncoding="UTF-8"%>
 3 <%@taglib prefix="s" uri="/struts-tags" %>
 4 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
 5 <html>
 6 <head>
 7 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
 8 <title>Insert title here</title>
 9 </head>
10 <body>
11 
12 <!-- 这是就是用户名和真实姓名错误后显示的信息 -->
13 <s:actionerror/>
14 
15 用户注册
16 <s:form action="/registerAction" method="post">
17     <s:textfield name="user.userName" label="用户名"></s:textfield>
18     <s:textfield name="user.name" label="真实姓名"></s:textfield>
19     <s:textfield name="user.age" label="年龄"></s:textfield>
20     <s:textfield name="user.email" label="邮件"></s:textfield>
21     <s:textfield name="user.homePage" label="主页"></s:textfield>
22     <s:submit value="注册"></s:submit>
23 </s:form>
24 </body>
25 </html>

success.jsp

 1 <%@ page language="java" contentType="text/html; charset=UTF-8"
 2     pageEncoding="UTF-8"%>
 3 <%@taglib prefix="s" uri="/struts-tags" %>
 4 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
 5 <html>
 6 <head>
 7 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
 8 <title>Insert title here</title>
 9 </head>
10 <body>
11 注册成功
12 </body>
13 </html>

结果显示：（什么都没有写就提交了的结果显示）

第三节：自定义验证

例子：

validators.xml

 1 <?xml version="1.0" encoding="UTF-8"?>
 2 <!DOCTYPE validators PUBLIC
 3         "-//Apache Struts//XWork Validator Config 1.0//EN"
 4         "http://struts.apache.org/dtds/xwork-validator-config-1.0.dtd">
 5 <validators>
 6     <validator name="required" class="com.opensymphony.xwork2.validator.validators.RequiredFieldValidator"/>
 7     <validator name="requiredstring" class="com.opensymphony.xwork2.validator.validators.RequiredStringValidator"/>
 8     <validator name="int" class="com.opensymphony.xwork2.validator.validators.IntRangeFieldValidator"/>
 9     <validator name="double" class="com.opensymphony.xwork2.validator.validators.DoubleRangeFieldValidator"/>
10     <validator name="date" class="com.opensymphony.xwork2.validator.validators.DateRangeFieldValidator"/>
11     <validator name="expression" class="com.opensymphony.xwork2.validator.validators.ExpressionValidator"/>
12     <validator name="fieldexpression" class="com.opensymphony.xwork2.validator.validators.FieldExpressionValidator"/>
13     <validator name="email" class="com.opensymphony.xwork2.validator.validators.EmailValidator"/>
14     <validator name="url" class="com.opensymphony.xwork2.validator.validators.URLValidator"/>
15     <validator name="visitor" class="com.opensymphony.xwork2.validator.validators.VisitorFieldValidator"/>
16     <validator name="conversion" class="com.opensymphony.xwork2.validator.validators.ConversionErrorFieldValidator"/>
17     <validator name="stringlength" class="com.opensymphony.xwork2.validator.validators.StringLengthFieldValidator"/>
18     <validator name="regex" class="com.opensymphony.xwork2.validator.validators.RegexFieldValidator"/>
19     <validator name="conditionalvisitor" class="com.opensymphony.xwork2.validator.validators.ConditionalVisitorFieldValidator"/>
20     
21     <!-- 自己定义配置的validatiors验证敏感词汇 -->
22     <validator name="sensitive" class="com.wishwzp.validators.SensitiveWordValidators"/>
23 </validators>

SensitiveWordValidators.java

 1 package com.wishwzp.validators;
 2 
 3 import com.opensymphony.xwork2.validator.ValidationException;
 4 import com.opensymphony.xwork2.validator.validators.FieldValidatorSupport;
 5 
 6 public class SensitiveWordValidators extends FieldValidatorSupport{
 7 
 8     @Override
 9     public void validate(Object object) throws ValidationException {
10         String fieldName=this.getFieldName();//获取字段名称
11         String value=this.getFieldValue(fieldName, object).toString();//获取用户输入的值
12         if(!check(value)){
13             this.addFieldError(fieldName, object);
14         }
15     }
16     
17     public boolean check(String value){
18         String sensitiveWords[]={"你妹","你妈"};//敏感词汇
19         for(int i=0;i<sensitiveWords.length;i++){
20             if(value.indexOf(sensitiveWords[i])>-1){
21                 return false;
22             }
23         }
24         return true;
25     }
26 
27 }

struts.xml

 1 <?xml version="1.0" encoding="UTF-8" ?>
 2 <!DOCTYPE struts PUBLIC
 3     "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
 4     "http://struts.apache.org/dtds/struts-2.0.dtd">
 5 
 6 <struts>
 7     
 8     <package name="manager" extends="struts-default">
 9         
10         <action name="validationAction" class="com.wishwzp.action.ValidationAction">
11             <result name="input">/validation.jsp</result>
12             <result name="success">/success.jsp</result>
13         </action>
14         
15     </package>
16  
17 </struts>

ValidationAction.java

 1 package com.wishwzp.action;
 2 
 3 import com.wishwzp.model.User;
 4 import com.opensymphony.xwork2.ActionSupport;
 5 
 6 public class ValidationAction extends ActionSupport{
 7 
 8     /**
 9      * 
10      */
11     private static final long serialVersionUID = 1L;
12     
13     private String name;
14     
15     
16 
17     public String getName() {
18         return name;
19     }
20 
21 
22 
23     public void setName(String name) {
24         this.name = name;
25     }
26 
27 
28 
29     @Override
30     public String execute() throws Exception {
31         System.out.println("姓名："+name);
32         return SUCCESS;
33     }
34     
35     
36 
37 }

ValidationAction-validation.xml

 1 <?xml version="1.0" encoding="UTF-8"?>
 2 <!DOCTYPE validators PUBLIC "-//Apache Struts//XWork Validator 1.0.2//EN" "http://struts.apache.org/dtds/xwork-validator-1.0.2.dtd">
 3 
 4 <validators>
 5     <field name="name">
 6         <field-validator type="requiredstring">
 7             <message>请输入姓名</message>
 8         </field-validator>
 9         
10         <field-validator type="sensitive">
11             <message>有敏感词汇</message>
12         </field-validator>
13     </field>
14     
15 </validators>

validation.jsp

 1 <%@ page language="java" contentType="text/html; charset=UTF-8"
 2     pageEncoding="UTF-8"%>
 3 <%@taglib prefix="s" uri="/struts-tags" %>
 4 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
 5 <html>
 6 <head>
 7 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
 8 <title>Insert title here</title>
 9 </head>
10 <body>
11 简单自定义验证
12 <s:form action="/validationAction" method="post">
13     <s:textfield name="name" label="姓名"></s:textfield>
14     <s:submit value="提交"></s:submit>
15 </s:form>
16 </body>
17 </html>

结果：

如果输入敏感词提交的话：

如果输入不是敏感词提交的话：