struts教程笔记5

最新推荐文章于 2024-04-18 11:29:39 发布

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本文探讨了Struts框架的配置与使用，包括如何通过XML文件定义servlet、filter及参数，实现对请求的过滤与关键字的检测。具体介绍了SafeFilter的作用，即通过检查用户输入来防止不当言论，确保网站内容的健康与安全。

思考怎么灵活过滤禁言关键字
在这里插入图片描述

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" version="2.5" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee   http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
  <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/struts-config.xml</param-value>
    </init-param>
    <init-param>
      <param-name>debug</param-name>
      <param-value>3</param-value>
    </init-param>
    <init-param>
      <param-name>detail</param-name>
      <param-value>3</param-value>
    </init-param>
    <load-on-startup>0</load-on-startup>
  </servlet>
  <servlet>
    <description>This is the description of my J2EE component</description>
    <display-name>This is the display name of my J2EE component</display-name>
    <servlet-name>SafeFilter</servlet-name>
    <servlet-class>com.xing.filter.SafeFilter</servlet-class>
  </servlet>


<!-- 重新部署Myfilter -->
  <filter>
  <filter-name>Myfilter</filter-name>
  <filter-class>com.xing.filter.Myfilter</filter-class>
  <init-param>
  <param-name>encoding</param-name>
  <param-value>utf-8</param-value>
  </init-param>
  </filter>
  
  <filter>
  <filter-name>SafeFilter</filter-name>
  <filter-class>com.xing.filter.SafeFilter</filter-class>
  <init-param>
  <param-name>keywords</param-name>
  <param-value>mmp;shabi;妈卖批;傻逼;垃圾;辣鸡;我操;wocao;laji;shit;wori;caonima</param-value>
  </init-param>
  </filter>
  
  <filter-mapping>
  <filter-name>Myfilter</filter-name>
  <url-pattern>/*</url-pattern>
  </filter-mapping>
  
  <filter-mapping>
  <filter-name>SafeFilter</filter-name>
  <url-pattern>/*</url-pattern>
  </filter-mapping>

  

  <welcome-file-list>
    <welcome-file>index.jsp</welcome-file>
  </welcome-file-list>
</web-app>

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts-config PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 1.2//EN" "http://struts.apache.org/dtds/struts-config_1_2.dtd">

<struts-config>
  <data-sources />
  <form-beans >
    <form-bean name="userForm" type="com.xing.struts.form.UserForm" />

  </form-beans>

  <global-exceptions />
  <global-forwards />
  <action-mappings >
    <action
      attribute="userForm"
      input="/register.jsp"
      name="userForm"
      path="/reg"
      scope="request"
      type="com.xing.struts.action.RegAction"
      validate="false">
      <forward name="ok" path="/ok.jsp" />
      <forward name="err" path="/register.jsp" />
      <forward name="userErr" path="/info.jsp" />
    </action>


  </action-mappings>

  <message-resources parameter="com.xing.struts.ApplicationResources" />
</struts-config>

<%@ 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 'index.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>
    <jsp:forward page="/register.jsp"></jsp:forward>
  </body>
</html>

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%@ taglib uri="http://struts.apache.org/tags-html" prefix="html"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <title>My JSP 'register.jsp' starting page</title>
  </head>
  
  <body>
  	<html:form action="/reg.do" method="post">
  	用户账号<html:text property="userid"></html:text><br/>
  	用户姓名<html:text property="username"></html:text><br/>
  	电子邮件<html:text property="email"></html:text><br/>
  	<html:submit value="注册"></html:submit>
  	<html:cancel value="重新填写"></html:cancel>
  	</html:form>
  </body>
</html>

<%@ 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 'ok.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>
    Register OK!<br>
  </body>
</html>

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>  
    <title>My JSP 'info.jsp' starting page</title>
  </head>
  
  <body>
    用户名设置有问题 <%=request.getAttribute("err2") %><br/>
    <a href="/strutstag/register.jsp">返回重新注册</a>
  </body>
</html>

package com.xing.filter;


import java.io.IOException;

import javax.servlet.http.HttpServlet;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;

public class Myfilter extends HttpServlet implements Filter {
	private String encoding;
	public void doFilter(ServletRequest arg0, ServletResponse arg1, FilterChain arg2) throws IOException, ServletException {
		// TODO Auto-generated method stub
		arg0.setCharacterEncoding(encoding);
		arg2.doFilter(arg0, arg1);
	}

	public void init(FilterConfig arg0) throws ServletException {
		// TODO Auto-generated method stub
		encoding=arg0.getInitParameter("encoding");
	}
	
}

package com.xing.filter;

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;

public class SafeFilter extends HttpServlet implements Filter {
	private String keywords[];
	public void doFilter(ServletRequest arg0, ServletResponse arg1, FilterChain arg2) throws IOException, ServletException {
		// TODO Auto-generated method stub
		String name=arg0.getParameter("username");
		System.out.println("管理安全的过滤器接收到的名字："+name);
		if(name!=null){
			//判断
			for(String key:keywords){
				if(key.equals(name)){
					arg0.setAttribute("err2", "第二个过滤器拦截,用户名不能设置为<font color='red'>"+name+"</font>");
					arg0.getRequestDispatcher("/info.jsp").forward(arg0, arg1);
					return;
				}
			}
		}
		arg2.doFilter(arg0, arg1);
	}

	public void init(FilterConfig arg0) throws ServletException {
		// TODO Auto-generated method stub
		//得到配置的过滤器中的关键字数组
		keywords=arg0.getInitParameter("keywords").split(";");
	}
	
}

/*
 * Generated by MyEclipse Struts
 * Template path: templates/java/JavaClass.vtl
 */
package com.xing.struts.action;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import com.xing.struts.form.UserForm;

/** 
 * MyEclipse Struts
 * Creation date: 02-22-2020
 * 
 * XDoclet definition:
 * @struts.action path="/login" name="userForm" scope="request"
 */
public class RegAction extends Action {
	/*
	 * Generated Methods
	 */

	/** 
	 * Method execute
	 * @param mapping
	 * @param form
	 * @param request
	 * @param response
	 * @return ActionForward
	 */
	public ActionForward execute(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response) {
		UserForm userForm = (UserForm) form;// TODO Auto-generated method stub
		System.out.println("userId: "+userForm.getUserid()+" "+userForm.getUsername()+" "+userForm.getEmail());
		if(true){
			return mapping.findForward("ok");
		}else return mapping.findForward("err");
	}
}

/*
 * Generated by MyEclipse Struts
 * Template path: templates/java/JavaClass.vtl
 */
package com.xing.struts.form;

import org.apache.struts.action.ActionForm;

/** 
 * MyEclipse Struts
 * Creation date: 02-22-2020
 * 
 * XDoclet definition:
 * @struts.form name="userForm"
 */
public class UserForm extends ActionForm {
	private String userid;
	private String username;
	private String email;
	public String getEmail() {
		return email;
	}
	public void setEmail(String email) {
		this.email = email;
	}
	public String getUserid() {
		return userid;
	}
	public void setUserid(String userid) {
		this.userid = userid;
	}
	public String getUsername() {
		return username;
	}
	public void setUsername(String username) {
		this.username = username;
	}
}