filter

本文介绍了一个用于处理用户非法登录尝试的过滤器组件。该过滤器通过检查用户的会话状态来确定是否允许用户访问特定资源,并在未授权访问时重定向至登录页面。
/*
* Created on 2004-11-19
*
* TODO To change the template for this generated file go to
* Window - Preferences - Java - Code Style - Code Templates
*/
package com.aisino.common.util;

import java.io.IOException;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import com.aisino.privisys.Constants;

/**
*
* @author vincent.shan
*
* 功能:用户非法登录访问跳转处理
*/
public class AuthFilter extends HttpServlet implements Filter {


/**
*
*/
private static final long serialVersionUID = 3435621465821410076L;
private FilterConfig fileterConfig;

public void init(FilterConfig arg0) throws ServletException {
this.fileterConfig = arg0;

}

public void doFilter(ServletRequest request, ServletResponse response, FilterChain filterChain) throws IOException,
ServletException {
HttpServletRequest httpRequest = (HttpServletRequest) request;
String uri = httpRequest.getRequestURI();
boolean flag=(httpRequest.getSession().getAttribute(Constants.userKey)==null);
uri=uri.replaceAll("([?].*)|([/].*[/])","");
String authUrls = fileterConfig.getInitParameter("authUrls");
if (flag) {
if(authUrls.length()>0&&authUrls.indexOf(uri)!=-1){
filterChain.doFilter(request, response);
return;
}
((HttpServletResponse) response).sendRedirect(WebUtil.getCompeleteContext(httpRequest)+"login.jsp");
return;
} else {
filterChain.doFilter(request, response);
return;
}
}
public void destroy() {
this.fileterConfig = null;
}


}

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE web-app PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN" "http://java.sun.com/dtd/web-app_2_3.dtd">

<web-app>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/classes/config/spring/*.xml</param-value>
</context-param>
<context-param>
<param-name>javax.servlet.jsp.jstl.fmt.localizationContext</param-name>
<param-value>config/i18n/messages_zh_CN</param-value>
</context-param>
<context-param>
<param-name>extremecomponentsPreferencesLocation</param-name>
<param-value>/config/i18n/extremetable.properties</param-value>
</context-param>
<context-param>
<param-name>extremecomponentsMessagesLocation</param-name>
<param-value>config/i18n/extremetableResourceBundle</param-value>
</context-param>
<filter>
<filter-name>encodingFilter</filter-name>
<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
<init-param>
<param-name>encoding</param-name>
<param-value>UTF-8</param-value>
</init-param>
</filter>
<filter>
<filter-name>eXtremeExport</filter-name>
<filter-class>org.extremecomponents.table.filter.ExportFilter</filter-class>
<init-param>
<param-name>responseHeadersSetBeforeDoFilter</param-name>
<param-value>true</param-value>
</init-param>
</filter>
<filter>
<filter-name>Auth</filter-name>
<filter-class>com.aisino.common.util.AuthFilter</filter-class>
<init-param>
<param-name>authUrls</param-name>
<param-value>ctaisRequest.do,login.do,authQueryService.do</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>encodingFilter</filter-name>
<url-pattern>*.do</url-pattern>
</filter-mapping>
<filter-mapping>
<filter-name>encodingFilter</filter-name>
<url-pattern>*.jsp</url-pattern>
</filter-mapping>
<filter-mapping>
<filter-name>eXtremeExport</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<filter-mapping>
<filter-name>Auth</filter-name>
<url-pattern>*.do</url-pattern>
</filter-mapping>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<listener>
<listener-class>org.springframework.web.util.IntrospectorCleanupListener</listener-class>
</listener>
<servlet>
<servlet-name>action</servlet-name>
<servlet-class>org.apache.struts.action.ActionServlet</servlet-class>
<init-param>
<param-name>config</param-name>
<param-value>/WEB-INF/classes/config/struts/struts-config.xml,
/WEB-INF/classes/config/struts/privisys-struts-config.xml,
/WEB-INF/classes/config/struts/netinv-struts-config.xml,
/WEB-INF/classes/config/struts/notice-struts-config.xml,
/WEB-INF/classes/config/struts/baseInf-struts-config.xml,
/WEB-INF/classes/config/struts/invoiceFail-struts-config.xml,
/WEB-INF/classes/config/struts/fpyj-struts-config.xml
</param-value>
</init-param>
<init-param>
<param-name>debug</param-name>
<param-value>2</param-value>
</init-param>
<init-param>
<param-name>detail</param-name>
<param-value>2</param-value>
</init-param>
<load-on-startup>2</load-on-startup>
</servlet>
<!--
<servlet>
<servlet-name>xfire</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:org/codehaus/xfire/spring/xfire.xml,/WEB-INF/classes/config/spring/xfire-servlet.xml</param-value>
</init-param>
</servlet>
-->
<!--
<servlet-mapping>
<servlet-name>xfire</servlet-name>
<url-pattern>/webservice/*</url-pattern>
</servlet-mapping>

-->
<servlet-mapping>
<servlet-name>action</servlet-name>
<url-pattern>*.do</url-pattern>
</servlet-mapping>

<session-config>
<session-timeout>600</session-timeout>
</session-config>
<welcome-file-list>
<welcome-file>index.html</welcome-file>
<welcome-file>welcome.jsp</welcome-file>
<welcome-file>login.jsp</welcome-file>
</welcome-file-list>

<error-page>
<error-code>500</error-code>
<location>/errorPage.jsp</location>
</error-page>
<error-page>
<error-code>404</error-code>
<location>/404.jsp</location>
</error-page>
<error-page>
<error-code>403</error-code>
<location>/errorPage.jsp</location>
</error-page>
<error-page>
<exception-type>java.lang.Exception</exception-type>
<location>/errorPage.jsp</location>
</error-page>
<taglib>
<taglib-uri>struts-bean</taglib-uri>
<taglib-location>/WEB-INF/tld/struts-bean.tld</taglib-location>
</taglib>
<taglib>
<taglib-uri>struts-html</taglib-uri>
<taglib-location>/WEB-INF/tld/struts-html.tld</taglib-location>
</taglib>
<taglib>
<taglib-uri>struts-logic</taglib-uri>
<taglib-location>/WEB-INF/tld/struts-logic.tld</taglib-location>
</taglib>
<taglib>
<taglib-uri>extremecomponents</taglib-uri>
<taglib-location>/WEB-INF/tld/extremecomponents.tld</taglib-location>
</taglib>
<taglib>
<taglib-uri>http://java.sun.com/jstl/core</taglib-uri>
<taglib-location>/WEB-INF/tld/c-1_0.tld</taglib-location>
</taglib>
<taglib>
<taglib-uri>/tags/struts-menu</taglib-uri>
<taglib-location>/WEB-INF/tld/struts-menu.tld</taglib-location>
</taglib>
<taglib>
<taglib-uri>/tags/struts-menu-el</taglib-uri>
<taglib-location>/WEB-INF/tld/struts-menu-el.tld</taglib-location>
</taglib>
<taglib>
<taglib-uri>automatic</taglib-uri>
<taglib-location>/WEB-INF/tld/automatic.tld</taglib-location>
</taglib>
<resource-ref>
<res-ref-name>login</res-ref-name>
<res-type>javax.sql.DataSource</res-type>
<res-auth>Container</res-auth>
</resource-ref>

</web-app>
基于51单片机,实现对直流电机的调速、测速以及正反转控制。项目包含完整的仿真文件、源程序、原理图和PCB设计文件,适合学习和实践51单片机在电机控制方面的应用。 功能特点 调速控制:通过按键调整PWM占空比,实现电机的速度调节。 测速功能:采用霍尔传感器非接触式测速,实时显示电机转速。 正反转控制:通过按键切换电机的正转和反转状态。 LCD显示:使用LCD1602液晶显示屏,显示当前的转速和PWM占空比。 硬件组成 主控制器:STC89C51/52单片机(与AT89S51/52、AT89C51/52通用)。 测速传感器:霍尔传感器,用于非接触式测速。 显示模块:LCD1602液晶显示屏,显示转速和占空比。 电机驱动:采用双H桥电路,控制电机的正反转和调速。 软件设计 编程语言:C语言。 开发环境:Keil uVision。 仿真工具:Proteus。 使用说明 液晶屏显示: 第一行显示电机转速(单位:转/分)。 第二行显示PWM占空比(0~100%)。 按键功能: 1键:加速键,短按占空比加1,长按连续加。 2键:减速键,短按占空比减1,长按连续减。 3键:反转切换键,按下后电机反转。 4键:正转切换键,按下后电机正转。 5键:开始暂停键,按一下开始,再按一下暂停。 注意事项 磁铁和霍尔元件的距离应保持在2mm左右,过近可能会在电机转动时碰到霍尔元件,过远则可能导致霍尔元件无法检测到磁铁。 资源文件 仿真文件:Proteus仿真文件,用于模拟电机控制系统的运行。 源程序:Keil uVision项目文件,包含完整的C语言源代码。 原理图:电路设计原理图,详细展示了各模块的连接方式。 PCB设计:PCB布局文件,可用于实际电路板的制作。
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