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Я пытаюсь создать форму входа в систему, используя HTML и логин, используя имя пользователя и пароль из базы данных Oracle, используя DataSource. FirstServlet.javaDataSource с сервлетами - javax.naming.NameNotFoundException
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
import javax.servlet.annotation.*;
import javax.naming.*;
import javax.sql.*;
import oracle.jdbc.*;
import java.sql.*;
import javax.annotation.Resource;
public class FirstServlet extends HttpServlet
{
DataSource ds;
Connection con;
public void init() throws ServletException
{
InitialContext ic=new InitialContext();
Context cont=(Context)ic.lookup("java:comp");
DataSource ds=(DataSource)cont.lookup("jdbc/xe");
}
protected void doPost(HttpServletRequest request,HttpServletResponse response throws ServletException,IOException
{
response.setContentType("text/html");
PrintWriter pw=response.getWriter();
String user=request.getParameter("username");
String pass=request.getParameter("pass");
boolean status=false;
try
{
con=ds.getConnection("sys","password");
PreparedStatement ps=con.prepareStatement("select * from example where name=? and pass=?");
ps.setString(1,user);
ps.setString(2,pass);
ResultSet rs=ps.executeQuery();
status=rs.next();
}
catch(Exception e)
{
System.out.println(e);
}
if(status)
{
RequestDispatcher rd=request.getRequestDispatcher("Welcome");
rd.forward(request,response);
}
else
{
pw.println("Username/Password error");
RequestDispatcher rd=request.getRequestDispatcher("index.html");
rd.include(request,response);
}
pw.close();
}
}
index.html (главная страница)
<html>
<form action="servlet1" method=post>
Name:<input type=text name=username></input>
<br />
Password:<input type=text name=pass>
<input type=submit value=login/>
</html>
web.xml
<?xml version="1.0" encoding="utf-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javae
/web-app_2_5.xsd" id="WebApp_ID" version="2.5">
<resource-ref>
<description>Example </description>
<res-ref-name>jdbc/xe</res-ref-name>
<res-type>javax.sql.DataSource</res-type>
<res-auth>Container</res-auth>
</resource-ref>
<servlet>
<servlet-name>FirstServlet</servlet-name>
<servlet-class>FirstServlet</servlet-class>
</servlet>
<servlet>
<servlet-name>WelcomeServlet</servlet-name>
<servlet-name>WelcomeServlet</servlet-name>
</servlet>
<servlet-mapping>
<servlet-name>FirstServlet</servlet-name>
<url-pattern>servlet1</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>WelcomeServlet</servlet-name>
<url-pattern>servlet2</url-pattern>
</servlet-mapping>
<welcome-file-list>
<welcome-file>index.html</welcome-file>
</welcome-file-list>
</web-app>
WelcomeServlet.java
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
import javax.servlet.annotation.*;
import javax.naming.*;
import javax.sql.*;
import oracle.jdbc.*;
public class WelcomeServlet extends HttpServlet
{
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws IOException,ServletException
{
response.setContentType("text/html");
PrintWriter out=response.getWriter();
String username=request.getParameter("username");
out.println("Welcome "+username);
}
}
И, наконец, context.xml в папке конф:
<?xml version='1.0' encoding='utf-8'?>
<Context>
<WatchedResource>WEB-INF/web.xml</WatchedResource>
<Resource name="jdbc/xe" auth="Container"
type="javax.sql.DataSource" driverClassName="oracle.jdbc.OracleDriver"
url="jdbc:oracle:thin:@127.0.0.1:1521:xe"
username="sys" password="password" maxActive="20" maxIdle="10"
maxWait="-1"/>
</Context>
Но когда я пытаюсь запустить приложение от Tomcat Manager, он не развернуть. Ниже приведена ошибка в файле журнала Catalina:
Apr 12, 2013 3:11:25 PM org.apache.catalina.deploy.NamingResources cleanUp
WARNING: Failed to retrieve JNDI naming context for container [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/login]] so no cleanup was performed for that container
javax.naming.NameNotFoundException: Name [comp/env] is not bound in this Context. Unable to find [comp].
at org.apache.naming.NamingContext.lookup(NamingContext.java:820)
at org.apache.naming.NamingContext.lookup(NamingContext.java:168)
at org.apache.catalina.deploy.NamingResources.cleanUp(NamingResources.java:988)
at org.apache.catalina.deploy.NamingResources.stopInternal(NamingResources.java:970)
at org.apache.catalina.util.LifecycleBase.stop(LifecycleBase.java:232)
at org.apache.catalina.core.StandardContext.stopInternal(StandardContext.java:5590)
at org.apache.catalina.util.LifecycleBase.stop(LifecycleBase.java:232)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:141)
at org.apache.catalina.manager.ManagerServlet.start(ManagerServlet.java:1256)
at org.apache.catalina.manager.HTMLManagerServlet.start(HTMLManagerServlet.java:714)
at org.apache.catalina.manager.HTMLManagerServlet.doPost(HTMLManagerServlet.java:219)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:647)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.filters.CsrfPreventionFilter.doFilter(CsrfPreventionFilter.java:213)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.filters.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:108)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:581)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:947)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1009)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:312)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
В файле context.xml есть что-то не так?
EDIT: Я изменил путь к Java:/сост/окр/JDBC/х, но я получаю другую ошибку:
org.apache.catalina.startup.HostConfig deployDirectory
SEVERE: Error deploying web application directory C:\Program Files\Apache Software Foundation\Tomcat 7.0\webapps\login
java.lang.IllegalStateException: ContainerBase.addChild: start: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/login]]
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:904)
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:877)
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:633)
at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:1114)
at org.apache.catalina.startup.HostConfig$DeployDirectory.run(HostConfig.java:1673)
at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)
at java.util.concurrent.FutureTask.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)