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:

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

写RegisterAction.java类：

 1 public class RegisterAction extends ActionSupport{
 2     private static final long serialVersionUID = 1L;
 3     private User user;
 4     public User getUser() {
 5         return user;
 6     }
 7     public void setUser(User user) {
 8         this.user = user;
 9     }
10     @Override
11     public String execute() throws Exception {
12         System.out.println("传入的用户："+user);
13         return SUCCESS;
14     }
15 }

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!

 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 <validators>
 4     <field name="user.userName">
 5         <field-validator type="requiredstring">
 6             <message>请输入用户名</message>
 7         </field-validator>
 8          <field-validator type="stringlength">
 9              <param name="minLength">6</param>
10              <param name="maxLength">10</param>
11             <message>用户名必须在${minLength}和${maxLength}之间</message>
12         </field-validator>
13     </field>
14     <field name="user.name">
15         <field-validator type="requiredstring">
16             <message>请输入姓名</message>
17         </field-validator>
18     </field>
19     <field name="user.age">
20         <field-validator type="int">
21             <param name="min">18</param>
22             <message>年龄必须满18周岁</message>
23         </field-validator>
24     </field>
25     <field name="user.email">
26         <field-validator type="requiredstring">
27             <message>请输入邮件</message>
28         </field-validator>
29         <field-validator type="email">
30             <message>邮件格式不对</message>
31         </field-validator>
32     </field>
33     <field name="user.homePage">
34         <field-validator type="requiredstring">
35             <message>请输入主页</message>
36         </field-validator>
37         <field-validator type="url">
38             <message>主页格式不对</message>
39         </field-validator>
40 </field>
41 //验证表达式
42     <validator type="expression">
43         <param name="expression"><![CDATA[!user.name.equal(user.userName)]]></param>
44         <message>用户名和真实姓名不能相同！</message>
45     </validator>
46 </validators>

View Code

在struts.xml中配置：

1 <struts>
2     <package name="manager" extends="struts-default">
3         <action name="registerAction" class="com.java1234.action.RegisterAction">
4             <result name="input">/register.jsp</result>
5             <result name="success">/success.jsp</result>
6         </action>
7     </package>
8 </struts>

注册页面register.jsp:

 1 <body>
 2 <s:actionerror/>  //可以将验证表达式的值输出；
 3 用户注册
 4 <s:form action="/registerAction" method="post">
 5     <s:textfield name="user.userName" label="用户名"></s:textfield>
 6     <s:textfield name="user.name" label="真实姓名"></s:textfield>
 7     <s:textfield name="user.age" label="年龄"></s:textfield>
 8     <s:textfield name="user.email" label="邮件"></s:textfield>
 9     <s:textfield name="user.homePage" label="主页"></s:textfield>
10     <s:submit value="注册"></s:submit>
11 </s:form>
12 </body>

success.jsp页面：

1 <body>
2 　　注册成功
3 </body>

开始验证：

其中struts的默认的Validators：

 1 <validators>
 2     <validator name="required" class="com.opensymphony.xwork2.validator.validators.RequiredFieldValidator"/>
 3     <validator name="requiredstring" class="com.opensymphony.xwork2.validator.validators.RequiredStringValidator"/>
 4     <validator name="int" class="com.opensymphony.xwork2.validator.validators.IntRangeFieldValidator"/>
 5     <validator name="double" class="com.opensymphony.xwork2.validator.validators.DoubleRangeFieldValidator"/>
 6     <validator name="date" class="com.opensymphony.xwork2.validator.validators.DateRangeFieldValidator"/>
 7     <validator name="expression" class="com.opensymphony.xwork2.validator.validators.ExpressionValidator"/>
 8     <validator name="fieldexpression" class="com.opensymphony.xwork2.validator.validators.FieldExpressionValidator"/>
 9     <validator name="email" class="com.opensymphony.xwork2.validator.validators.EmailValidator"/>
10     <validator name="url" class="com.opensymphony.xwork2.validator.validators.URLValidator"/>
11     <validator name="visitor" class="com.opensymphony.xwork2.validator.validators.VisitorFieldValidator"/>
12     <validator name="conversion" class="com.opensymphony.xwork2.validator.validators.ConversionErrorFieldValidator"/>
13     <validator name="stringlength" class="com.opensymphony.xwork2.validator.validators.StringLengthFieldValidator"/>
14     <validator name="regex" class="com.opensymphony.xwork2.validator.validators.RegexFieldValidator"/>
15     <validator name="conditionalvisitor" class="com.opensymphony.xwork2.validator.validators.ConditionalVisitorFieldValidator"/>
16     </validators>

现在我们自创建检查敏感词汇的验证器ValidationAction:

 1 public class ValidationAction extends ActionSupport{
 2     private static final long serialVersionUID = 1L;
 3     private String name;
 4     public String getName() {
 5         return name;
 6     }
 7     public void setName(String name) {
 8         this.name = name;
 9     }
10     @Override
11     public String execute() throws Exception {
12         System.out.println("姓名："+name);
13         return SUCCESS;
14     }
15 }

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 <validators>
 4     <field name="name">
 5         <field-validator type="requiredstring">
 6             <message>请输入姓名</message>
 7         </field-validator>
 8          <field-validator type="sensitive">
 9             <message>有敏感词汇！</message>
10         </field-validator>
11     </field>
12 </validators>

Validators配置：

 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 <validators>
 4     <field name="name">
 5         <field-validator type="requiredstring">
 6             <message>请输入姓名</message>
 7         </field-validator>
 8          <field-validator type="sensitive">
 9             <message>有敏感词汇！</message>
10         </field-validator>
11     </field>
12 </validators>

设置验证器SensitiveWordValidators：

 1 public class SensitiveWordValidators extends FieldValidatorSupport{
 2     @Override
 3     public void validate(Object object) throws ValidationException {
 4         // TODO Auto-generated method stub
 5         //获取输入的用户字段
 6         String fieldName=this.getFieldName();
 7         String value=this.getFieldValue(fieldName, object).toString();
 8         if(!check(value)){
 9             this.addFieldError(fieldName, object);
10         }
11     }
12     public boolean check(String value){
13         String sensitive[]={"王八","tmd","md"};
14         for(int i=0;i<sensitive.length;i++){
15                 if(value.indexOf(sensitive[i])>-1){
16                     return false;
17                 }
18         }
19         return true;
20     }
21 }

在validators.xml中加入：

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

配置struts.xml：

1 <struts>
2     <package name="manager" extends="struts-default">
3         <action name="validationAction" class="com.java1234.action.ValidationAction">
4             <result name="input">/validation.jsp</result>
5             <result name="success">/success.jsp</result>
6         </action>
7     </package>
8 </struts>

创建validation.jsp文件：

1 自定义验证
2 <s:form action="/validationAction" method="post">
3     <s:textfield name="name" label="姓名"></s:textfield>
4     <s:submit value="提交"></s:submit>
5 </s:form>

验证结果：

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原文地址：https://www.cnblogs.com/zyxsblogs/p/10941017.html