How do I customize HttpServletRequest, HttpServletResponse?

How do I customize a httpservletrequest?

Like spring MVC, we usually write

@RequestMapping (value = "/helloworld", method = requestmethod.get) public modelandview test (HttpServletRequest req, HttpServletResponse Res) {return new Modelandview ("index.jsp");}

have been thinking, can not httpservletrequest, and httpservletresponse it? Finally, I studied the following wording.

@RequestMapping (value = "/helloworld", method = requestmethod.get) public modelandview test (WebRequest req, WebResponse RES) {return new Modelandview ("index.jsp");}

Public void dofilter (servletrequest request, servletresponse response,  Filterchain filterchain)  throws IOException, ServletException {     HttpServletRequest httpRequest =  (HttpServletRequest)  request;     if (! ( httprequest instanceof webrequest))     {         httprequest = new webrequest (HttpRequest);    }     HttpServletResponse httpResponse =  (HttpServletResponse)  response;     if (! ( Httpresponse instanceof webresponse))     {         httpresponse = new webresponse (HttpResponse);    }     filterchain.dofilter (httprequest, httpresponse);}

The principle is to customize an interceptor in Web. XML, intercept all URLs and give httpservletrequest to ServletRequest.

Private ServletRequest request;public Servletrequestwrapper (ServletRequest request) {if (request = = null) {thro    W New IllegalArgumentException ("Request cannot be null");    } else {this.request = Request; }}

Attach the code OK (everyone can paste directly-haha-my favorite):

Xml

<?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 ">    <listener>         <listener-class>org.springframework.web.context.contextloaderlistener</ listener-class>    </listener>    <!--  Set Spring container load profile path  -->    <context-param>         <param-name>contextConfigLocation</param-name>         <param-value>classpath:spring-*.xml</param-value>    </context-param>    <servlet>         <servlet-name>springmvc</servlet-name>         <servlet-class>org.springframework.web.servlet.DispatcherServlet< /servlet-class>        <load-on-startup>1</load-on-startup >    </servlet>    <servlet-mapping>         <servlet-name>springmvc</servlet-name>         <url-pattern>/</url-pattern>    </servlet-mapping>     <filter>        <filter-name> Interceptallfilter</filter-name>        <filter-class> Com.test.filter.RequestFIlter</filter-class>    </filter>    <filter-mapping >        <filter-name>interceptAllFilter</filter-name>         <url-pattern>/*</url-pattern>     </filter-mapping></web-app>

Pom.xml

<project xmlns= "http://maven.apache.org/POM/4.0.0"  xmlns:xsi= "http://www.w3.org/2001/ Xmlschema-instance "  xsi:schemalocation=" http://maven.apache.org/POM/4.0.0 http:// Maven.apache.org/maven-v4_0_0.xsd ">  <modelVersion>4.0.0</modelVersion>   <groupId>Test</groupId>  <artifactId>test</artifactId>  < Packaging>war</packaging>  <version>1.0-snapshot</version>  <name >com.test Maven Webapp</name>  <url>http://maven.apache.org</url>     <dependencies>        <dependency>             <groupid>com.alibaba</groupid >            <artifactid>fastjson</ artifactid>            <version>1.2.6</version>         </dependency>        <dependency>             <groupId>org.springframework</groupId>             <artifactid>spring-webmvc</ artifactid>            <version>4.0.1. Release</version>            <type>jar </type>        </dependency>       <dependency>        <groupId>org.springframework< /groupid>        <artifactid>spring-core</artifactid>         <version>4.0.1.release</version>         <type>jar</type>      </dependency>       <dependency>        <groupId> Org.springframework</groupid>        <artifactid> Spring-context</artifactid>        <version>4.0.1.release </version>        <type>jar</type>       </dependency>      <dependency>         <groupId>org.springframework</groupId>         <artifactId>spring-context-support</artifactId>         <version>4.0.1.release</version>      </dependency>       <dependency>        <groupId> Org.springframework</groupid>        <artifactid> spring-web</artifactid>        <version>4.0.1.release</ version>      </dependency>         <dependency>            <groupid >javax.servlet</groupId>            < artifactid>servlet-api</artifactid>             <version>2.5</version>             <scope>provided</scope>        </dependency>    </dependencies>   <build>    <finalName>test</finalName>       <pluginmanagement>          <plugins >              <plugin>                   < groupid>org.apache.tomcat.maven</groupid>                   <artifactId>tomcat6-maven-plugin</artifactId>                    <version>2.2</version>               </plugin>              <plugin>                   <groupId> org.apache.tomcat.maven</groupid>                   <artifactId>tomcat7-maven-plugin</artifactId>                   < version>2.2</version>               </plugin>          </plugins>       </pluginManagement>  </build></project>

Webrequest.java

/** * Created by Shaoyongyang on 2015/6/5. */package Com.test.core;import Javax.servlet.http.httpservletrequest;import Javax.servlet.http.httpservletrequestwrapper;public class WebRequest extends Httpservletrequestwrapper {public    WebRequest (HttpServletRequest request) {super (request); }}

Webresponse.java

/** * Created by Shaoyongyang on 2015/6/5. */package Com.test.core;import Javax.servlet.http.httpservletresponse;import Javax.servlet.http.httpservletresponsewrapper;public class WebResponse extends Httpservletresponsewrapper {public    WebResponse (HttpServletResponse response) {super (response); }}

Requestfilter.java

/** * created by shaoyongyang on 2015/6/5. */package com.test.filter; Import com.test.core.webrequest;import com.test.core.webresponse;import javax.servlet.*;import  javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import  java.io.ioexception;public class requestfilter implements filter {     public void init (Filterconfig filterconfig)  throws servletexception {     }    public void dofilter (ServletRequest request,  servletresponse response, filterchain filterchain)  throws IOException,  Servletexception {        httpservletrequest httprequest  =  (httpservletrequest)  request;        if (!) ( Httprequest instanceof webrequEST))         {             httprequest = new webrequest (HttpRequest);         }        HttpServletResponse httpResponse  =  (HttpServletResponse)  response;        if (! ( Httpresponse instanceof webresponse))         {             httpresponse = new webresponse ( HttpResponse);        }         filterchain.dofilter (Httprequest, httpresponse);    }     Public void destroy ()  {    }}

Testcontroller.java

/** * created by shaoyongyang on 2015/6/5. */package com.test.action; import com.alibaba.fastjson.jsonobject;import com.test.core.webrequest;import  com.test.core.webresponse;import org.springframework.stereotype.controller;import  org.springframework.web.bind.annotation.requestmapping;import  Org.springframework.web.bind.annotation.requestmethod;import org.springframework.web.servlet.modelandview ; import javax.servlet.http.httpservletrequest;import javax.servlet.http.httpservletresponse;import  java.io.PrintWriter; @Controllerpublic  class testcontroller{    @ Requestmapping (value =  "/helloworld",  method = requestmethod.get)      public modelandview test (webrequest req, webresponse res)  {         return new modelandview ("index.jsp");     }} 

Springmvc-servlet.xml in Web-inf

<?xml version= "1.0"  encoding= "UTF-8"? ><beans xmlns= "http://www.springframework.org/ Schema/beans "   xmlns:mvc=" Http://www.springframework.org/schema/mvc "     Xmlns:util= "Http://www.springframework.org/schema/util"       xmlns:xsi= "http// Www.w3.org/2001/XMLSchema-instance "   xmlns:p=" http://www.springframework.org/schema/p "  xmlns:context= "Http://www.springframework.org/schema/context"    xsi:schemalocation= "http// www.springframework.org/schema/beans    http://www.springframework.org/schema/beans/ spring-beans-3.0.xsd    http://www.springframework.org/schema/context     http://www.springframework.org/schema/context/spring-context-3.0.xsd    http:// Www.springframework.org/schema/mvc    http://www.springframework.org/schema/mvc/ Spring-mvc-3.0.xsd   http://www. springframework.org/schema/util            http:/ /www.springframework.org/schema/util/spring-util-3.0.xsd ">    <mvc:annotation-driven  />    <!--  Automatically scans all classes under the controller package to make it think of Spring mvc's controllers  -->    <context:component-scan base-package= "Com.test.action"  /></beans>

Code copy of the more, in fact, the key is still on the top. Inside the Requestfilter.

MAVEN projects can be directly mvn Tomcat:run

reference to a foreign brother on GitHub wrote the code, attached to the address:https://github.com/surenrao/nsr-bookstore/tree/ 1a7e56d306819e9939d9d67bd12ee2043e8997ce/java/bookstore-web

How do I customize HttpServletRequest, HttpServletResponse?