struts2验证框架

struts2验证简介：基于struts2拦截器为开发者提供一套验证框架，并且可扩展，一般验证都支持

a.继承ActionSupport类

b.修改struts2.xml文件：删除method属性

c.在需要验证的Action类的相同包下，写一个"类名-validation.xml"文件

d.在"类名-validation.xml"文件加入头信息以具有提示功能

e."类名-validation.xml"文件验证代码示例




true
用户名必填






true
10
4
去掉两端空格后，字符串长度应为4-10






6
10
age必须在 ${min} 和${max}之间






 
 
 




         
             
             
             年龄必须大于100
         
    





必须输入一个生日

一、内置验证

User.java

package com.java.model;

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 + "]";
	}
	
}

RegisterAction.java

package com.java.action;

import com.java.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;
	}
	
	

}

struts.xml







		
		
			/register.jsp
			/success.jsp

RegisterAction-validation.xml(要写在action的包下面)





    
        
            请输入用户名
        
         
         	6
         	10
            用户名必须在${minLength}和${maxLength}之间
        
    
    
    	
            请输入姓名
        
    
    
    	
    		18
            年龄必须满18周岁
        
    
    
    	
            请输入邮件
        
        
            邮件格式不对
        
    
    
    	
            请输入主页
        
        
            主页格式不对
        
    
    
    
    
    	
    	用户名和真实姓名不能相同

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%@taglib prefix="s" uri="/struts-tags" %>




Insert title here

结果：

验证表达式：

二、自定义验证

在下载的struts2的源码包找到这个路径struts-2.3.16.3\src\apps\portlet\src\main\resources

的validators.xml这个xml文件

将他复制到项目的src下面

写自定义验证敏感词方法：

SensitiveWordValidators.java

package com.java.validators;

import com.opensymphony.xwork2.validator.ValidationException;
import com.opensymphony.xwork2.validator.validators.FieldValidatorSupport;

public class SensitiveWordValidators extends FieldValidatorSupport{

	public void validate(Object object) throws ValidationException {
		//调试发现fieldName得到"name"
		String fieldName=this.getFieldName();
		//获取用户输入的值
		String value=this.getFieldValue(fieldName, object).toString();
		if(!check(value)){
			//返回错误信息给input页面
			this.addFieldError(fieldName, object);
		}
	}
	//验证方法
	//返回字符中indexof（string）中字串string在父串中首次出现的位置，从0开始！没有返回-1；
	public boolean check(String value){
		String sensitiveWords[]={"操","傻逼"};
		for(int i=0;i-1){
				return false;
			}
		}
		return true;
		
	}

}

在validators.xml加入刚刚写的验证方法

ValidationAction.java

package com.java.action;

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

struts.xml








		
			/validation.jsp
			/success.jsp

视图层

validation.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%@taglib prefix="s" uri="/struts-tags" %>




Insert title here


简单自定义验证

结果：

struts2验证框架

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