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；
Struts2 内置验证
struts2内置的验证器
第三节 ：自定义验证
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，下面，将以一个注册的例子来举例：
首先创建一个pojo类
package com.mrlv.pojo;
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 + "]";
}
}
然后。创建一个jsp表单，注意：这里的<s:actionerror/>是显示验证表达式错误提示。
<%@ 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>
</html>
然后，创建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("执行RegisterAction，接收："+user);
return SUCCESS;
}
}
如果想调用内部验证框架则，需要在Action同一个包内下创建RegisterAction-validation.xml，名字要求有规范。
<?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">
<!-- 这里是错误返回提示语 -->
<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>
<!-- 这里是表达式验证 -->
<validator type="expression">
<param name="expression"><![CDATA[!user.name.equals(user.userName)]]></param>
<message>用户名和真实姓名不能相同</message>
</validator>
</validators>
最后配置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">
<!-- 这里input是错误后返回的页面 -->
<result name="input">/register.jsp</result>
<result name="success">/success.jsp</result>
</action>
</package>
</struts>
自定义验证器
如果你需要添加一些自定义的验证器的话，可以创建一个验证器，如下。
package com.mrlv.validators;
import com.opensymphony.xwork2.validator.ValidationException;
import com.opensymphony.xwork2.validator.validators.FieldValidatorSupport;
/**
* 自定义校验器
*/
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);
}
}
//判断传入字符是否含有敏感字符
public boolean check(String value){
String sensitiveWords[]={"操","你妈"};
for(int i=0;i<sensitiveWords.length;i++){
if(value.indexOf(sensitiveWords[i])>-1){
return false;
}
}
return true;
}
}
接下来就是把这个验证器配置到配置文件里，接下来需要在src文件夹下创建一个validators.xml文件
注意：这里是必须规定名字。
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"/>
<!-- 添加新增的验证器 -->
<validator name="sensitive" class="com.mrlv.validators.SensitiveWordValidators"/>
</validators>
调用的时候，只需要在action包内调用的***Action下创建***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>有敏感词汇</message>
</field-validator>
</field>
</validators>
以上便是struts的校验框架。
时间： 2024-10-12 19:41:34