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chenhaoxiangchenhaoxiang
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敏感词过滤
1 parent 82e376c commit 3e7deee

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‎myWordsFilterWeb/.classpath

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<?xml version="1.0" encoding="UTF-8"?>
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<classpath>
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<classpathentry kind="src" path="src"/>
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<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER"/>
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<classpathentry kind="con" path="melibrary.com.genuitec.eclipse.j2eedt.core.MYECLIPSE_JAVAEE_6_CONTAINER"/>
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<classpathentry kind="con" path="org.eclipse.jst.j2ee.internal.web.container"/>
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<classpathentry kind="con" path="org.eclipse.jst.j2ee.internal.module.container"/>
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<classpathentry kind="output" path="WebRoot/WEB-INF/classes"/>
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</classpath>

‎myWordsFilterWeb/.mymetadata

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<?xml version="1.0" encoding="UTF-8"?>
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<project-module
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type="WEB"
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name="myWordsFilterWeb"
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id="myeclipse.1471510148708"
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context-root="/myWordsFilterWeb"
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j2ee-spec="6.0"
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archive="myWordsFilterWeb.war">
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<attributes>
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<attribute name="webrootdir" value="WebRoot" />
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</attributes>
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</project-module>
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‎myWordsFilterWeb/.project

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<?xml version="1.0" encoding="UTF-8"?>
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<projectDescription>
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<name>myWordsFilterWeb</name>
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<comment></comment>
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<projects>
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</projects>
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<buildSpec>
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<buildCommand>
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<name>org.eclipse.wst.common.project.facet.core.builder</name>
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<arguments>
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</arguments>
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</buildCommand>
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<buildCommand>
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<name>org.eclipse.wst.jsdt.core.javascriptValidator</name>
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<arguments>
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</arguments>
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</buildCommand>
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<buildCommand>
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<name>com.genuitec.eclipse.j2eedt.core.WebClasspathBuilder</name>
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<arguments>
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</arguments>
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</buildCommand>
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<buildCommand>
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<name>org.eclipse.jdt.core.javabuilder</name>
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<arguments>
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</arguments>
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</buildCommand>
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<buildCommand>
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<name>com.genuitec.eclipse.j2eedt.core.J2EEProjectValidator</name>
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<arguments>
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</arguments>
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</buildCommand>
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<buildCommand>
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<name>com.genuitec.eclipse.j2eedt.core.DeploymentDescriptorValidator</name>
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<arguments>
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</arguments>
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</buildCommand>
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<buildCommand>
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<name>org.eclipse.wst.validation.validationbuilder</name>
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<arguments>
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</arguments>
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</buildCommand>
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<buildCommand>
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<name>com.genuitec.eclipse.ast.deploy.core.DeploymentBuilder</name>
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<arguments>
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</arguments>
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</buildCommand>
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</buildSpec>
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<natures>
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<nature>com.genuitec.eclipse.ast.deploy.core.deploymentnature</nature>
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<nature>org.eclipse.jem.workbench.JavaEMFNature</nature>
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<nature>com.genuitec.eclipse.j2eedt.core.webnature</nature>
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<nature>org.eclipse.jdt.core.javanature</nature>
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<nature>org.eclipse.wst.jsdt.core.jsNature</nature>
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<nature>org.eclipse.wst.common.project.facet.core.nature</nature>
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<nature>org.eclipse.wst.common.modulecore.ModuleCoreNature</nature>
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</natures>
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</projectDescription>

‎myWordsFilterWeb/.settings/.jsdtscope

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<?xml version="1.0" encoding="UTF-8"?>
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<classpath>
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<classpathentry kind="src" path="WebRoot"/>
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<classpathentry kind="con" path="org.eclipse.wst.jsdt.launching.JRE_CONTAINER"/>
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<classpathentry kind="con" path="org.eclipse.wst.jsdt.launching.WebProject">
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<attributes>
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<attribute name="hide" value="true"/>
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</attributes>
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</classpathentry>
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<classpathentry kind="con" path="org.eclipse.wst.jsdt.launching.baseBrowserLibrary"/>
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<classpathentry kind="output" path=""/>
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</classpath>

‎myWordsFilterWeb/.settings/org.eclipse.jdt.core.prefs

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#Thu Aug 18 16:49:09 CST 2016
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eclipse.preferences.version=1
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org.eclipse.jdt.core.compiler.codegen.inlineJsrBytecode=enabled
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org.eclipse.jdt.core.compiler.codegen.targetPlatform=1.6
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org.eclipse.jdt.core.compiler.compliance=1.6
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org.eclipse.jdt.core.compiler.problem.assertIdentifier=error
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org.eclipse.jdt.core.compiler.problem.enumIdentifier=error
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org.eclipse.jdt.core.compiler.source=1.6

‎myWordsFilterWeb/.settings/org.eclipse.wst.common.component

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<?xml version="1.0" encoding="UTF-8"?>
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<project-modules id="moduleCoreId" project-version="1.5.0">
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<wb-module deploy-name="myWordsFilterWeb">
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<wb-resource deploy-path="/" source-path="/WebRoot"/>
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<wb-resource deploy-path="/WEB-INF/classes" source-path="/src"/>
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<property name="context-root" value="/myWordsFilterWeb"/>
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<property name="java-output-path" value="/myWordsFilterWeb/WebRoot/WEB-INF/classes"/>
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</wb-module>
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</project-modules>

‎myWordsFilterWeb/.settings/org.eclipse.wst.common.project.facet.core.xml

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<?xml version="1.0" encoding="UTF-8"?>
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<faceted-project>
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<fixed facet="wst.jsdt.web"/>
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<installed facet="java" version="1.6"/>
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<installed facet="jst.web" version="3.0"/>
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<installed facet="wst.jsdt.web" version="1.0"/>
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</faceted-project>

‎myWordsFilterWeb/.settings/org.eclipse.wst.jsdt.ui.superType.container

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org.eclipse.wst.jsdt.launching.baseBrowserLibrary

‎myWordsFilterWeb/.settings/org.eclipse.wst.jsdt.ui.superType.name

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Window

‎myWordsFilterWeb/README.md

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通过Filter来实现留言板的敏感词过滤...
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思路很简单，我们这里的敏感词是直接先放进去的，实际项目中，肯定是存在数据库中。
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在Filter 过滤器中，我们先拿到用户提交的留言，如果出现了敏感词，我们就用*号来替换。

‎myWordsFilterWeb/WebRoot/META-INF/MANIFEST.MF

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Manifest-Version: 1.0
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Class-Path:
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‎myWordsFilterWeb/WebRoot/WEB-INF/classes/cn/hncu/filter/MyRequest.class

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‎myWordsFilterWeb/WebRoot/WEB-INF/classes/cn/hncu/filter/WordFilter.class

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‎myWordsFilterWeb/WebRoot/WEB-INF/classes/cn/hncu/pubs/WordsUtil.class

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‎myWordsFilterWeb/WebRoot/WEB-INF/classes/cn/hncu/servlet/NoteServlet.class

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‎myWordsFilterWeb/WebRoot/WEB-INF/web.xml

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<?xml version="1.0" encoding="UTF-8"?>
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<web-app version="3.0"
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xmlns="http://java.sun.com/xml/ns/javaee"
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xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
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http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd">
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<display-name></display-name>
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<filter>
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<filter-name>wordFilter</filter-name>
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<filter-class>cn.hncu.filter.WordFilter</filter-class>
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</filter>
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<filter-mapping>
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<filter-name>wordFilter</filter-name>
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<url-pattern>/*</url-pattern>
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</filter-mapping>
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<servlet>
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<servlet-name>NoteServlet</servlet-name>
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<servlet-class>cn.hncu.servlet.NoteServlet</servlet-class>
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</servlet>
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<servlet-mapping>
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<servlet-name>NoteServlet</servlet-name>
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<url-pattern>/NoteServlet</url-pattern>
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</servlet-mapping>
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<welcome-file-list>
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<welcome-file>index.jsp</welcome-file>
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</welcome-file-list>
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</web-app>

‎myWordsFilterWeb/WebRoot/index.jsp

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<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
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<%@taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<html>
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<head>
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<title>过滤器应用示例---敏感词过滤</title>
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</head>
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<body>
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<h2>过滤器应用示例---敏感词过滤</h2>
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<form action="<c:url value='/NoteServlet'/>" method="post">
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用户名:<input type="text" name="name" /><br/><br/>
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<fieldset>
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<legend>留言板</legend>
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<textarea name="note" rows="10" cols="20"></textarea>
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</fieldset>
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<input type="submit" value="留言" />
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</form>
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</body>
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</html>

‎myWordsFilterWeb/myWordsFilterWeb.zip

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‎myWordsFilterWeb/src/cn/hncu/filter/WordFilter.java

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package cn.hncu.filter;
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import java.io.IOException;
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import java.util.List;
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import javax.servlet.Filter;
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import javax.servlet.FilterChain;
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import javax.servlet.FilterConfig;
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import javax.servlet.ServletException;
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import javax.servlet.ServletRequest;
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import javax.servlet.ServletResponse;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletRequestWrapper;
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import cn.hncu.pubs.WordsUtil;
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public class WordFilter implements Filter{
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@Override
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public void init(FilterConfig filterConfig) throws ServletException {
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}
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@Override
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public void doFilter(ServletRequest request, ServletResponse response,
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FilterChain chain) throws IOException, ServletException {
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request.setCharacterEncoding("utf-8");
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//在过滤器中用装饰模式把 原装request的功能增强了
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//---拦截后台调用的getParamter()方法
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MyRequest req = new MyRequest((HttpServletRequest)request);
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chain.doFilter(req, response);//放行
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}
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@Override
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public void destroy() {
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}
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}
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class MyRequest extends HttpServletRequestWrapper{
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public MyRequest(HttpServletRequest request) {
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super(request);
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}
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@Override
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public String getParameter(String name) {
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String str = super.getParameter(name);
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List<String> list = WordsUtil.getWords();
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for(String word : list){
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str = str.replaceAll(word, "*");
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}
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return str;
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}
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}

‎myWordsFilterWeb/src/cn/hncu/pubs/WordsUtil.java

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package cn.hncu.pubs;
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import java.util.ArrayList;
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import java.util.List;
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public class WordsUtil {
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private static List<String> list = new ArrayList<String>();
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static{
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//这里应该从数据库中导入敏感词的，我在这里就直接用词来模拟了
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list.add("骂人");
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list.add("sb");
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}
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public static List<String> getWords(){
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return list;
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}
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public static void reBuild(){
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//把list中的内容存储到数据库---每一段时间存储一次
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}
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}

‎myWordsFilterWeb/src/cn/hncu/servlet/NoteServlet.java

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package cn.hncu.servlet;
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import java.io.IOException;
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import java.io.PrintWriter;
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import javax.servlet.ServletException;
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import javax.servlet.http.HttpServlet;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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public class NoteServlet extends HttpServlet {
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public void doGet(HttpServletRequest request, HttpServletResponse response)
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throws ServletException, IOException {
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response.setContentType("text/html;charset=utf-8");
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PrintWriter out = response.getWriter();
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out.println("不支持GET方式留言");
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out.close();
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}
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public void doPost(HttpServletRequest request, HttpServletResponse response)
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throws ServletException, IOException {
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response.setContentType("text/html;charset=utf-8");
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PrintWriter out = response.getWriter();
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out.println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">");
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out.println("<HTML>");
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out.println(" <HEAD><TITLE>A Servlet</TITLE></HEAD>");
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out.println(" <BODY>");
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String name = request.getParameter("name");
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if(name==null || name.trim().length()<=0){
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out.println("名字不能为空!!!");
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}else{
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String words = request.getParameter("note");
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out.println("<br/>"+name+"的留言是:<br/>"+ words);
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}
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out.println(" </BODY>");
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out.println("</HTML>");
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out.flush();
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out.close();
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}
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}

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