（七）Struts2 验证框架
2016-05-09 01:32
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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
<?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.wishwzp.action.RegisterAction"> <result name="input">/register.jsp</result> <result name="success">/success.jsp</result> </action> </package> </struts>
User.java
package com.wishwzp.model;
public class User {
private String userName;//用户名
private String name;//真实姓名
private int age;//年龄
private String email;//邮件
private String homePage;//主页
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 + "]";
}
}RegisterAction.java
package com.wishwzp.action;
import com.wishwzp.model.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("传入的用户："+user);
return SUCCESS;
}
}RegisterAction-validation.xml （这个文件命名规范：XXXX-validation.xml,其中XXXX就是后台action类）
<?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>
<!-- 用户名格式验证 -->
<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>
<!-- 真实姓名格式验证 -->
<field name="user.name">
<field-validator type="requiredstring">
<message>请输入姓名</message>
</field-validator>
</field>
<!-- 年龄格式验证 -->
<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>
<!-- 邮件格式验证 -->
<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>
<!-- 主页格式验证 -->
<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>
<!-- 用户名和真实姓名不能相同验证 -->
<!-- !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 -->
<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>register.jsp
<%@ 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> <!-- 这是就是用户名和真实姓名错误后显示的信息 --> <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>
success.jsp
<%@ 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> 注册成功 </body> </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
<?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"/> <!-- 自己定义配置的validatiors验证敏感词汇 --> <validator name="sensitive" class="com.wishwzp.validators.SensitiveWordValidators"/> </validators>
SensitiveWordValidators.java
package com.wishwzp.validators;
import com.opensymphony.xwork2.validator.ValidationException;
import com.opensymphony.xwork2.validator.validators.FieldValidatorSupport;
public class SensitiveWordValidators extends FieldValidatorSupport{
@Override
public void validate(Object object) throws ValidationException {
String fieldName=this.getFieldName();//获取字段名称
String value=this.getFieldValue(fieldName, object).toString();//获取用户输入的值
if(!check(value)){
this.addFieldError(fieldName, object);
}
}
public boolean check(String value){
String sensitiveWords[]={"你妹","你妈"};//敏感词汇
for(int i=0;i<sensitiveWords.length;i++){
if(value.indexOf(sensitiveWords[i])>-1){
return false;
}
}
return true;
}
}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="validationAction" class="com.wishwzp.action.ValidationAction"> <result name="input">/validation.jsp</result> <result name="success">/success.jsp</result> </action> </package> </struts>
ValidationAction.java
package com.wishwzp.action;
import com.wishwzp.model.User;
import com.opensymphony.xwork2.ActionSupport;
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>
validation.jsp
<%@ 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> 简单自定义验证 <s:form action="/validationAction" method="post"> <s:textfield name="name" label="姓名"></s:textfield> <s:submit value="提交"></s:submit> </s:form> </body> </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：
内容来自用户分享和网络整理，不保证内容的准确性，如有侵权内容，可联系管理员处理 
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