第十二部分_Struts2输入校验

最新推荐文章于 2024-10-28 15:26:02 发布

转载最新推荐文章于 2024-10-28 15:26:02 发布 · 48 阅读

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CC 4.0 BY-SA版权

原文链接：http://www.cnblogs.com/Code-Rush/p/4662751.html

下面提供一个输入校验的一个实例，递进式学习：

首先，建立输入页面：register.jsp:

<%@ page language="java" import="java.util.*" pageEncoding="GBK"%>
<%@ taglib uri="/struts-tags" prefix="s" %>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <base href="<%=basePath%>">
    
    <title>My JSP 'register.jsp' starting page</title>
    
	<meta http-equiv="pragma" content="no-cache">
	<meta http-equiv="cache-control" content="no-cache">
	<meta http-equiv="expires" content="0">    
	<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
	<meta http-equiv="description" content="This is my page">
	<!--
	<link rel="stylesheet" type="text/css" href="styles.css">
	-->

  </head>
  
  <body>
  
  	<table align="center" width="40%" border="0">
    		<tr>
    			<td> 
    				 <s:actionerror cssStyle="color:red"/><%--actionerror中增加的所有信息显示到页面上 --%> 
    				 __________________________________________________
    				 <s:fielderror cssStyle="color:blue"></s:fielderror>
    			</td>
    		</tr>
    </table>
   
    <form action="register.action" method="post">
    
    	<table align="center" width="40%" border=1">
    		<tr>
    			<td> 
    				username: 
    			</td>
    				
    			<td>
    				<input type="text" name="username" size="20">
    			</td>
    		</tr>
    		
    		
    		<tr>
    			<td>
    				password:
    			</td>
    				
    			<td>
    				<input type="password" name="password" size="20">
    			</td>
    		</tr>
    		
    		
    		<tr>
    			<td>
    				re-password:
    			</td>
    				
    			<td>
    				<input type="password" name="repassword" size="20">
    			</td>
    		</tr>
    	
    	
    		<tr>
    			<td>
    				age:
    			</td>
    				
    			<td>
    				<input type="text" name="age" size="20">
    			</td>
    		</tr>
    	
    	
    		<tr>
    			<td>
    				birthday:
    			</td>
    				
    			<td>
    				<input type="text" name="birthday" size="20">
    			</td>
    		</tr>
    		
    		
    		<tr>
    			<td>
    				graduation:
    			</td>
    				
    			<td>
    				<input type="text" name="graduation" size="20">
    			</td>
    		</tr>
    		
    		<tr>
    			<td>
    				<input type="submit" value="submit"/>
    			</td>
    				
    			<td>
    				<input type="reset" value="reset"/>
    			</td>
    		</tr>
    	</table>
    
    
    
    
    
    
    </form>
    
 
  </body>
</html>

接着建立处理类RegisterAction：

package com.test.action;

import java.util.Calendar;
import java.util.Date;

import com.opensymphony.xwork2.ActionSupport;

public class RegisterAction extends ActionSupport
{
	private String username;
	
	private String password;
	
	private String repassword;
	
	private int age;
	
	private Date birthday;
	
	private Date graduation;

	public String getUsername()
	{
		return username;
	}

	public void setUsername(String username)
	{
		this.username = username;
	}

	public String getPassword()
	{
		return password;
	}

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

	public String getRepassword()
	{
		return repassword;
	}

	public void setRepassword(String repassword)
	{
		this.repassword = repassword;
	}

	public int getAge()
	{
		return age;
	}

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

	public Date getBirthday()
	{
		return birthday;
	}

	public void setBirthday(Date birthday)
	{
		this.birthday = birthday;
	}

	public Date getGraduation()
	{
		return graduation;
	}

	public void setGraduation(Date graduation)
	{
		this.graduation = graduation;
	}

	@Override
	public String execute() throws Exception
	{
		System.out.println("execute invoked");
		return SUCCESS;
	}
	
	public String test() throws Exception
	{
		System.out.println("test invoked");
		return SUCCESS;
	}
	
	public void validateTest()
	{
		
	}
	
	@Override
	public void validate()
	{
		System.out.println("validate~~~~~~~~~~~~~~~~");
		
		if(null == username || username.length() < 6 || username.length() > 10)
		{
			// 进行错误消息输出
			this.addActionError("username invalid");
			this.addFieldError("username", "field error: username invalid");
		}
		
		if(null == password || password.length() < 6 || password.length() > 10)
		{
			this.addActionError("password invalid");
		}
		else if(null == repassword || repassword.length() < 6 || repassword.length() > 10)
		{
			this.addActionError("repassword invalid");
		}
		else if(!password.equals(repassword))
		{
			this.addActionError("two passwords not the same");
		}
		
		if(age < 1 || age > 150)
		{
			this.addActionError("age invalid");
			// this.addFieldError("age", "field error: age invalid");
		}
		
		if(null == birthday)
		{
			this.addActionError("birthday invalid");
		}
		
		if(null == graduation)
		{
			this.addActionError("graduation invalid");
		}
		
		if(null != birthday && null != graduation) // 可以不写，因为前面验证通过了
		{
			Calendar c1 = Calendar.getInstance();
			c1.setTime(birthday);
			
			Calendar c2 = Calendar.getInstance();
			c2.setTime(graduation);
			
			if(!c1.before(c2))
			{
				this.addActionError("birthday should be before graduation");
			}
		}
	}
}

success.jsp如下：

<%@ page language="java" import="java.util.*" pageEncoding="ISO-8859-1"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <base href="<%=basePath%>">
    
    <title>My JSP 'success.jsp' starting page</title>
    
	<meta http-equiv="pragma" content="no-cache">
	<meta http-equiv="cache-control" content="no-cache">
	<meta http-equiv="expires" content="0">    
	<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
	<meta http-equiv="description" content="This is my page">
	<!--
	<link rel="stylesheet" type="text/css" href="styles.css">
	-->

  </head>
  
  <body>
    
    <table align="center" width="40%" border=1">
    		<tr>
    			<td>
    				username:
    			</td>
    				
    			<td>
    				${requestScope.username }
    			</td>
    		</tr>
    		
    		
    		<tr>
    			<td>
    				password:
    			</td>
    				
    			<td>
    				${requestScope.password }
    			</td>
    		</tr>
    
    		<tr>
    			<td>
    				age:
    			</td>
    				
    			<td>
    				${requestScope.age }
    			</td>
    		</tr>
    	
    	
    		<tr>
    			<td>
    				birthday:
    			</td>
    				
    			<td>
    				${requestScope.birthday }
    			</td>
    		</tr>
    		
    		
    		<tr>
    			<td>
    				graduation:
    			</td>
    				
    			<td>
    				${requestScope.graduation }
    			</td>
    		</tr>
    	</table>
    
  
    
  </body>
</html>

web.xml文件配置如下：

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" 
	xmlns="http://java.sun.com/xml/ns/javaee" 
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
	xsi:schemaLocation="http://java.sun.com/xml/ns/javaee 
	http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
  
  <filter>
  	<filter-name>struts2</filter-name>
  	<filter-class>
  		org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter
  	</filter-class>
  </filter>
  
  <filter-mapping>
  	<filter-name>struts2</filter-name>
  	<url-pattern>/*</url-pattern>
  </filter-mapping>
  
  
</web-app>

struts.xml配置如下：

<?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="struts2" extends="struts-default">
		
			<action name="helloworld" class="com.test.action.HelloWorld">
				<result name="success">/helloworld.jsp</result>
			</action>
			
			<action name="login" class="com.test.action.LoginAction">
				<result name="success">/result.jsp</result>
			</action>
			
			<action name="converterAction" class="com.test.action.PointAction" method="test">
				<result name="success">/output.jsp</result>
			</action>
			
			<action name="register" class="com.test.action.RegisterAction" method="test">
				<result name="success">/success.jsp</result>
				<result name="input">/register.jsp</result>
			</action>
		</package>
	
	
	</struts>

为了实现本地化，在RegisterAction.java所在的包com.test.action下新建一个RegisterAction.properties文件，通过Add的方式添加以下内容：

访问http://localhost:8080/struts2/register.jsp，这里是一个输出案例：

这里需要注意的几点：校验方法中自己定义的校验方法首先执行，最后执行validate方法；Action级别的消息struts是不会帮助我们自动生成的，而field级别的错误消息会帮助我们生成，同时还可以写自己的错误消息，这是field级别的struts定义的和字节定义的消息都会输出；为了在页面上输出信息，需要在form表单上面添加类似下面这样的信息：

<s:actionerror cssStyle="color:red"/><%--actionerror中增加的所有信息显示到页面上 --%>
<s:fielderror cssStyle="color:blue"></s:fielderror>

转载于:https://www.cnblogs.com/Code-Rush/p/4662751.html