An experiment was done today:The servlet accesses the file under the Web-inf directory notice.html
At the end of the day, I guess the reason for the use of the Tomcat 8 version is that it's not going to work.
The current results are as follows:
The code and configuration are as follows:
PackageCom.helloxr.servlet;Importjava.io.IOException;ImportJava.io.PrintWriter;Importjava.util.Enumeration;Importjavax.servlet.ServletException;ImportJavax.servlet.http.HttpServlet;Importjavax.servlet.http.HttpServletRequest;ImportJavax.servlet.http.HttpServletResponse;/** servlet accesses files under the Web-inf directory notice.html*/ Public classInitparamservletextendsHttpServlet {Private Static Final LongSerialversionuid = 6272811112212L; Public voiddoget (httpservletrequest request, httpservletresponse response)throwsservletexception, IOException {request.setcharacterencoding ("UTF-8");//set the request encoding methodResponse.setcharacterencoding ("UTF-8");//Setting the response encoding methodResponse.setcontenttype ("Text/html");//set type to HTML typePrintWriter out =Response.getwriter (); Out.println ("<! DOCTYPE HTML public \ "-//W3C//DTD HTML 4.01 transitional//en\" > "); Out.println ("<HTML>"); Out.println ("<HEAD><TITLE> please log in and view Notice file </TITLE>"); Out.println ("<style>body,td,div {font-size:12px;} </style> "); Out.println ("</HEAD>"); Out.println ("<BODY>"); Out.println ("<form action=" + request.getrequesturi () + "' method= ' post ' >"); Out.println ("Account: <input type= ' text ' name= ' username ' style= ' width:200px; ' > <br/><br/> "); Out.println ("Password: <input type= ' password ' name= ' password ' style= ' width:200px; ' > <br/><br/> "); Out.println ("<input type= ' submit ' value= ' login ' >"); Out.println ("</form>"); Out.println ("</BODY>"); Out.println ("</HTML>"); Out.flush (); Out.close (); } Public voidDoPost (httpservletrequest request, httpservletresponse response)throwsservletexception, IOException {String username= Request.getparameter ("username");//Usernmae parameters for submissionString Password = request.getparameter ("password");//Password parameters for submissionenumeration<string> params = This. Getinitparameternames ();//all initialization parameter names while(Params.hasmoreelements ()) {String Usernameparam= (String) params.nextelement ();//parameter name, which is the user nameString Passnameparam = Getinitparameter (Usernameparam);//parameter value, which is the password if(Usernameparam.equals (username) && passnameparam.equals (password)) {//Displays if the user name and password are matchedRequest.getrequestdispatcher ("/web-inf/notice.html"). Forward (Request,response); return; } } This. doget (Request, response);//username, password mismatch, show login page }}
Web. xml File Related content:
<servlet> <Servlet-name>Initparamservlet</Servlet-name> <Servlet-class>Com.helloxr.servlet.InitParamServlet</Servlet-class> <Init-param> <Param-name>Helloxr</Param-name> <Param-value>Password</Param-value> </Init-param> <Init-param> <Param-name>Admin</Param-name> <Param-value>Admin</Param-value> </Init-param> <Init-param> <Param-name>Babyface</Param-name> <Param-value>Babyface</Param-value> </Init-param></servlet>
< servlet-mapping > < Servlet-name > Initparamservlet</servlet-name> <Url-pattern >/servlet/initparamservlet</url-pattern> </ servlet-mapping>
Java Web Learning Note 3
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