ServletDataHora Erro

package servlet;

import java.io.IOException;

import java.io.PrintWriter;

import java.text.SimpleDateFormat;

import java.util.Date;

import javax.servlet.ServletConfig;

import javax.servlet.ServletException;

import javax.servlet.annotation.WebServlet;

import javax.servlet.http.HttpServlet;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

/**

Servlet implementation class ServletDataHora

*/

@WebServlet("/ServletDataHora")

public class ServletDataHora extends HttpServlet {

private static final long serialVersionUID = 1L;

private SimpleDateFormat format =

new SimpleDateFormat(“dd/MM/yyyy - hh:mm:ss”);

public void init(ServletConfig config) throws ServletException {

super.init();

log("ServletDataHora iniciado às "+ format.format(new Date()));

}

protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

PrintWriter saida = response.getWriter();

saida.write(“Olá! A data/hora atual é: “);

saida.write(format.format(new Date()));

saida.write(””);

saida.close();

}

public void destroy() {

log("ServletDataHora finalizado às " + format.format(new Date()));

super.destroy();

}

}

erro

INFO: Server startup in 822 ms

jan 24, 2021 3:58:10 PM org.apache.catalina.core.ApplicationContext log

SEVERE: StandardWrapper.Throwable

java.lang.NullPointerException

at javax.servlet.GenericServlet.getServletContext(GenericServlet.java:123)

at javax.servlet.GenericServlet.log(GenericServlet.java:188)

at servlet.ServletDataHora.init(ServletDataHora.java:26)

at org.apache.catalina.core.StandardWrapper.initServlet(StandardWrapper.java:1124)

at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1079)

at org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:761)

at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:133)

at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)

at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:494)

at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:137)

at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)

at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:651)

at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)

at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)

at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:407)

at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)

at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:754)

at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1376)

at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)

at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)

at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)

at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)

at java.base/java.lang.Thread.run(Thread.java:834)

jan 24, 2021 3:58:10 PM org.apache.catalina.core.StandardWrapperValve invoke
SEVERE: Allocate exception for servlet [servlet.ServletDataHora]
java.lang.NullPointerException
	at javax.servlet.GenericServlet.getServletContext(GenericServlet.java:123)
	at javax.servlet.GenericServlet.log(GenericServlet.java:188)
	at servlet.ServletDataHora.init(ServletDataHora.java:26)
	at org.apache.catalina.core.StandardWrapper.initServlet(StandardWrapper.java:1124)
	at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1079)
	at org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:761)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:133)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:494)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:137)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)
	at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:651)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)
	at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:407)
	at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
	at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:754)
	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1376)
	at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
	at java.base/java.lang.Thread.run(Thread.java:834)

2 Respostas

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