java - 带有 xml 配置的 Struts2 validator 不起作用

Question

这个问题已经有答案了:

The validation concept understanding in Struts 2 (2 个回答)

已关闭 6 年前。

我是Struts2的初学者。当我尝试使用验证框架来验证表单中的输入数据时，我遇到了一个问题: validator 根本不起作用。我可以得到当你通过验证而没有输入任何内容时应该返回的页面。

以下是我的代码和包，我在StackOverFlow上搜索过，但没有找到解决我的问题的解决方案。

注册.java

package validation;

/**
 * Created by xiangang.wei on 2016/10/26.
 */
public class Register {
    private String userName;
    private String password;
    private String rpassword;
    private int age;
    private int phone;
    private String email;

    public String getRpassword() {
        return rpassword;
    }

    public void setRpassword(String rpassword) {
        this.rpassword = rpassword;
    }

    public void setUserName(String userName) {
        this.userName = userName;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    public void setAge(int age) {
        this.age = age;
    }

    public void setPhone(int phone) {
        this.phone = phone;
    }

    public void setEmail(String email) {
        this.email = email;
    }

    public String getUserName() {

        return userName;
    }

    public String getPassword() {
        return password;
    }

    public int getAge() {
        return age;
    }

    public int getPhone() {
        return phone;
    }

    public String getEmail() {
        return email;
    }

    public String execute(){
        return "success";
    }
}

注册验证.xml

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE validators PUBLIC
        "-//OpenSymphony Group//XWork Validator 1.0.2//EN"
        "http://www.opensymphony.com/xwork/xwork-validator-1.0.2.dtd">


 <validators>
    <validator type="stringlength" >
        <param name="fieldName">userName</param>
        <param name="maxLength">10</param>
        <param name="minLength">1</param>
        <message>The length is wrong!</message>
    </validator>
    <validator type="fieldexpression">
        <param name="fieldName">password</param>
        <param name="expression">![CDATA[password == rpassword]]</param>
        <message>The password is not the same!</message>
    </validator>
    <validator type="int">
        <param name="fieldName">age</param>
        <param name="max">130</param>
        <param name="min">1</param>
        <message>The age must be 1 - 130</message>
    </validator>
    <validator type="email">
        <param name="fieldName">email</param>
        <message> Please enter a valid email address!</message>
    </validator>
</validators>

struts.xml

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE struts PUBLIC
        "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"
        "http://struts.apache.org/dtds/struts-2.3.dtd">

<struts>
<package name="register" extends="struts-default" namespace="/">
    <action name="register" class="validation.Register">
        <result name="success">/register-view/register-success.jsp</result>
        <result name="input">/index.jsp</result>
    </action>
</package>
</struts>

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
         version="3.1">


    <filter>
        <filter-name>struts2</filter-name>
        <filter-class>org.apache.struts2.dispatcher.filter.StrutsPrepareAndExecuteFilter</filter-class>
    </filter>
    <filter-mapping>
        <filter-name>struts2</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
</web-app>

构建.gradle

group 'xiangang.wei'
version '1.0-SNAPSHOT'

apply plugin: 'java'
apply plugin: 'war'

sourceCompatibility = 1.8

repositories {
    jcenter()
}

dependencies {
    testCompile group: 'junit', name: 'junit', version: '4.11'
    compile 'org.apache.struts:struts2-core:2.5'
}

index.jsp

<%@ taglib prefix="s" uri="/struts-tags" %>
<%--
  Created by IntelliJ IDEA.
  User: xiangang.wei
  Date: 2016/10/26
  Time: 11:19
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>User Register！</title>
</head>
<body>
<s:form action="register" method="POST">
    <table>
        <tr>
            <td><s:textfield label="Name" name="userName"/></td>
        </tr>
        <tr>
            <td><s:password label="Password" name="password"/></td>
        </tr>
        <tr>
            <td><s:password label="Confirm Password" name="rpassword"/></td>
        </tr>
        <tr>
            <td><s:textfield label="age" name="age"/></td>
        </tr>
        <tr>
            <td><s:textfield label="Phone" name="phone"/></td>
        </tr>
        <tr>
            <td><s:textfield label="Email" name="email"/></td>
        </tr>
        <tr>
            <td>
                <s:submit value="Submit"/>
            </td>
            <td>
                <s:reset value="Reset"/>
            </td>
        </tr>
    </table>
</s:form>
</body>
</html>

注册成功.jsp

<%@ taglib prefix="s" uri="/struts-tags" %>
<%--
  Created by IntelliJ IDEA.
  User: xiangang.wei
  Date: 2016/10/26
  Time: 13:55
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>注册成功！</title>
</head>
<body>
<h3>Congratulation!</h3>
<hr/>
<h5>Here is your registering info：</h5>
Name：<s:property value="userName"/>
Password：<s:property value="password"/>
Age：<s:property value="age"/>
E-mail：<s:property value="email"/>
Phone Number：<s:property value="phone"/>
</body>
</html>

Answer 1

验证由 Validation Interceptor 执行。来自其文档:

This interceptor runs the action through the standard validation framework, which in turn checks the action against any validation rules (found in files such as ActionClass-validation.xml) and adds field-level and action-level error messages (provided that the action implements ValidationAware).

您的操作不是扩展 ActionSupport(实现 ValidationAware 等)，也不是手动实现 ValidationAware。

您根本没有指示框架验证您的操作。

作为一条黄金法则，始终让您的操作扩展 ActionSupport。

更好的是，创建一个扩展 ActionSupport 的 BaseAction，您将在其中放置通用逻辑和设置，例如。区域设置/时区、日期解析格式等...然后使您的操作扩展 BaseAction。

<小时/>

编辑

在最近的 Struts2 版本中，DTD 发生了变化；替换这个

<!DOCTYPE validators PUBLIC "-//OpenSymphony Group//XWork Validator 1.0.2//EN"
                            "http://www.opensymphony.com/xwork/xwork-validator-1.0.2.dtd">

有了这个

<!DOCTYPE validators PUBLIC "-//Apache Struts//XWork Validator 1.0.3//EN"
                            "http://struts.apache.org/dtds/xwork-validator-1.0.3.dtd">

如上所述in the docs .