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Nullpointer podczas korzystania z response.sendRedirect()

2017-12-05 149 views
5

Przesyłam tę aplikację z weblogic do Jboss z maven i mam teraz ten komunikat na drugiej stronie. Masz pojęcie o tym, czego mógłbym przegapić?Nullpointer podczas korzystania z response.sendRedirect()

Nie działa z żadną stroną JSP, którą utworzę, ani z żadnym kontrolerem, który nazywam. Próbowałem utworzyć wystąpienie PrintWriter i wyprowadza String. Problem polega na kompilowaniu dowolnego jsp za pomocą tej funkcji. Ponadto index.jsp działa dobrze.

StackTrace w Server.log:

ESC[0mESC[31m09:51:38,753 ERROR [org.apache.catalina.core.ContainerBase.[jboss.web].[default-host].[/cashvariance].[jsp]] (http-/0.0.0.0:8180-1) JBWEB 
000236: Servlet.service() for servlet jsp threw exception: java.lang.NullPointerException 
     at java.io.Writer.write(Writer.java:157) [rt.jar:1.8.0_101] 
     at java.io.PrintWriter.newLine(PrintWriter.java:480) [rt.jar:1.8.0_101] 
     at java.io.PrintWriter.println(PrintWriter.java:629) [rt.jar:1.8.0_101] 
     at java.io.PrintWriter.println(PrintWriter.java:740) [rt.jar:1.8.0_101] 
     at org.apache.jasper.compiler.ServletWriter.printil(ServletWriter.java:130) [jbossweb-7.5.7.Final-redhat-1.jar:7.5.7.Final-redhat-1] 
     at org.apache.jasper.compiler.Generator.genPreamblePackage(Generator.java:481) [jbossweb-7.5.7.Final-redhat-1.jar:7.5.7.Final-redhat-1] 
     at org.apache.jasper.compiler.Generator.generatePreamble(Generator.java:584) [jbossweb-7.5.7.Final-redhat-1.jar:7.5.7.Final-redhat-1] 
     at org.apache.jasper.compiler.Generator.generate(Generator.java:3462) [jbossweb-7.5.7.Final-redhat-1.jar:7.5.7.Final-redhat-1] 
     at org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:244) [jbossweb-7.5.7.Final-redhat-1.jar:7.5.7.Final-redhat-1] 
     at org.apache.jasper.compiler.Compiler.compile(Compiler.java:359) [jbossweb-7.5.7.Final-redhat-1.jar:7.5.7.Final-redhat-1] 
     at org.apache.jasper.compiler.Compiler.compile(Compiler.java:339) [jbossweb-7.5.7.Final-redhat-1.jar:7.5.7.Final-redhat-1] 
     at org.apache.jasper.compiler.Compiler.compile(Compiler.java:326) [jbossweb-7.5.7.Final-redhat-1.jar:7.5.7.Final-redhat-1] 
     at org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:606) [jbossweb-7.5.7.Final-redhat-1.jar:7.5.7.Final-redhat-1] 
     at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:308) [jbossweb-7.5.7.Final-redhat-1.jar:7.5.7.Final-redhat-1] 
     at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:309) [jbossweb-7.5.7.Final-redhat-1.jar:7.5.7.Final-redhat-1] 
     at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:242) [jbossweb-7.5.7.Final-redhat-1.jar:7.5.7.Final-redhat-1] 
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:847) [jboss-servlet-api_3.0_spec-1.0.2.Final-redhat-2.jar:1.0.2.Final-redhat-2] 
     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:295) [jbossweb-7.5.7.Final-redhat-1.jar:7.5.7.Final-redhat-1] 
     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:214) [jbossweb-7.5.7.Final-redhat-1.jar:7.5.7.Final-redhat-1] 
     at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:231) [jbossweb-7.5.7.Final-redhat-1.jar:7.5.7.Final-redhat-1] 
     at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:149) [jbossweb-7.5.7.Final-redhat-1.jar:7.5.7.Final-redhat-1] 
     at org.jboss.as.web.security.SecurityContextAssociationValve.invoke(SecurityContextAssociationValve.java:169) [jboss-as-web-7.5.0.Final-redhat-21.jar:7.5.0.Final-redhat-21] 
     at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:150) [jbossweb-7.5.7.Final-redhat-1.jar:7.5.7.Final-redhat-1] 
     at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:97) [jbossweb-7.5.7.Final-redhat-1.jar:7.5.7.Final-redhat-1] 
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:102) [jbossweb-7.5.7.Final-redhat-1.jar:7.5.7.Final-redhat-1] 
     at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:344) [jbossweb-7.5.7.Final-redhat-1.jar:7.5.7.Final-redhat-1] 
     at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:854) [jbossweb-7.5.7.Final-redhat-1.jar:7.5.7.Final-redhat-1] 
     at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:653) [jbossweb-7.5.7.Final-redhat-1.jar:7.5.7.Final-redhat-1] 
     at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:926) [jbossweb-7.5.7.Final-redhat-1.jar:7.5.7.Final-redhat-1] 
     at java.lang.Thread.run(Thread.java:745) [rt.jar:1.8.0_101]

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/xsd/maven-4.0.0.xsd"> 
    <modelVersion>4.0.0</modelVersion> 
    <groupId>cashvariance</groupId> 
    <artifactId>cashvariance</artifactId> 
    <version>0.0.1-SNAPSHOT</version> 
    <packaging>war</packaging> 
    <build> 
     <resources> 
      <resource> 
       <directory>WebContent</directory> 
      </resource> 
     </resources> 
     <finalName>cashvariance</finalName> 
     <sourceDirectory>src</sourceDirectory> 

     <plugins> 
      <plugin> 
       <artifactId>maven-compiler-plugin</artifactId> 
       <version>3.5.1</version> 
       <configuration> 
        <source>1.7</source> 
        <target>1.7</target> 
       </configuration> 
      </plugin> 
      <plugin> 
       <artifactId>maven-war-plugin</artifactId> 
       <version>3.0.0</version> 
       <configuration> 
        <warSourceDirectory>WebContent</warSourceDirectory> 
       </configuration> 
      </plugin> 
     </plugins> 
    </build> 
    <dependencies> 
     <dependency> 
      <groupId>javax.servlet</groupId> 
      <artifactId>javax.servlet-api</artifactId> 
      <version>3.1.0</version> 
      <scope>provided</scope> 
     </dependency> 

     <dependency> 
      <groupId>javax.servlet.jsp</groupId> 
      <artifactId>jsp-api</artifactId> 
      <version>2.1</version> 
      <scope>provided</scope> 
     </dependency> 

     <!-- https://mvnrepository.com/artifact/log4j/log4j --> 
     <dependency> 
      <groupId>log4j</groupId> 
      <artifactId>log4j</artifactId> 
      <version>1.2.17</version> 
     </dependency> 
     <!-- https://mvnrepository.com/artifact/javax.mail/mail --> 
     <dependency> 
      <groupId>javax.mail</groupId> 
      <artifactId>mail</artifactId> 
      <version>1.4</version> 
     </dependency> 
     <!-- https://mvnrepository.com/artifact/com.unboundid/unboundid-ldapsdk --> 
     <dependency> 
      <groupId>com.unboundid</groupId> 
      <artifactId>unboundid-ldapsdk</artifactId> 
      <version>4.0.0</version> 
      <scope>test</scope> 
     </dependency> 
     <!-- https://mvnrepository.com/artifact/org.apache.taglibs/taglibs-standard-spec --> 
     <dependency> 
      <groupId>org.apache.taglibs</groupId> 
      <artifactId>taglibs-standard-spec</artifactId> 
      <version>1.2.5</version> 
     </dependency> 
     <dependency> 
      <groupId>org.apache.tomcat</groupId> 
      <artifactId>jasper</artifactId> 
      <version>6.0.32</version> 
     </dependency> 
    </dependencies> 
</project>

web.xml

<?xml version="1.0" encoding="UTF-8"?> 
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" id="WebApp_ID" version="3.1"> 
    <display-name>cashvariance</display-name> 

    <servlet> 
    <servlet-name>jsp</servlet-name> 
    <servlet-class>org.apache.jasper.servlet.JspServlet</servlet-class> 
    <init-param> 
     <param-name>pageCheckSeconds</param-name> 
     <param-value>-1</param-value> 
    </init-param> 
    <init-param> 
     <param-name>debug</param-name> 
     <param-value>true</param-value> 
    </init-param> 
    <init-param> 
     <param-name>keepgenerated</param-name> 
     <param-value>true</param-value> 
    </init-param> 
    <load-on-startup>0</load-on-startup> 
    </servlet> 

    <servlet> 
     <servlet-name>HelloWorldServlet</servlet-name> 
     <servlet-class>HelloWorldServlet</servlet-class> 
    </servlet> 
    <servlet> 
     <servlet-name>CashVarianceController</servlet-name>  
     <servlet-class>cashvariance.controller.CashVarianceServlet</servlet-class> 
    </servlet> 

    <servlet> 
     <servlet-name>DropDownController</servlet-name>  
     <servlet-class>cashvariance.controller.CashVarianceServletForDropDown</servlet-class> 
    </servlet> 
    <servlet> 
     <servlet-name>ManageRPAController</servlet-name> 
     <servlet-class>cashvariance.controller.ManageRPAServlet</servlet-class> 
    </servlet> 
    <servlet> 
     <servlet-name>AddRPAController</servlet-name> 
     <servlet-class>cashvariance.controller.AddRPAServlet</servlet-class> 
    </servlet> 
    <servlet> 
     <servlet-name>UpdateDeleteController</servlet-name> 
     <servlet-class>cashvariance.controller.UpdateDeleteServlet</servlet-class> 
    </servlet> 
    <servlet> 
     <servlet-name>DataDumpController</servlet-name> 
     <servlet-class>cashvariance.controller.DataDumpServlet</servlet-class> 
    </servlet> 
    <servlet> 
     <servlet-name>Main</servlet-name> 
     <servlet-class>cashvariance.controller.LoginController</servlet-class> 
    </servlet> 
    <servlet> 
     <servlet-name>SnoopServlet</servlet-name> 
     <servlet-class>SnoopServlet</servlet-class> 
    </servlet> 
    <servlet> 
     <servlet-name>logon</servlet-name> 
     <servlet-class>demo.log4j.servlet.LogonServlet</servlet-class> 
    </servlet> 
    <servlet> 
     <servlet-name>ForgotPassword</servlet-name> 
     <servlet-class>demo.log4j.servlet.ForgotPasswordServlet</servlet-class> 
    </servlet> 
    <servlet> 
     <servlet-name>Register</servlet-name> 
     <servlet-class>demo.log4j.servlet.RegisterServlet</servlet-class> 
    </servlet> 
    <servlet> 
     <servlet-name>GetComments</servlet-name> 
     <servlet-class>demo.log4j.servlet.GetCommentsServlet</servlet-class> 
    </servlet> 

    <servlet> 
     <servlet-name>log4jsetup</servlet-name> 
     <servlet-class>demo.log4j.servlet.Log4jSetupServlet</servlet-class> 
     <init-param> 
      <param-name>props</param-name> 
      <param-value>log4j.properties</param-value> 
     </init-param> 
     <init-param> 
      <param-name>watch</param-name> 
      <param-value>true</param-value> 
     </init-param> 
     <init-param> 
      <param-name>userDB</param-name> 
      <param-value>userDB.properties</param-value> 
     </init-param> 
     <load-on-startup>1</load-on-startup> 
    </servlet> 

    <servlet-mapping> 
     <servlet-name>HelloWorldServlet</servlet-name> 
     <url-pattern>/HelloWorldServlet</url-pattern> 
    </servlet-mapping> 
    <servlet-mapping> 
     <servlet-name>CashVarianceController</servlet-name> 
     <url-pattern>/CashVarianceController</url-pattern> 
    </servlet-mapping> 

    <servlet-mapping> 
     <servlet-name>DropDownController</servlet-name> 
     <url-pattern>/DropDownController</url-pattern> 
    </servlet-mapping> 
    <servlet-mapping> 
     <servlet-name>ManageRPAController</servlet-name> 
     <url-pattern>/ManageRPAController</url-pattern> 
    </servlet-mapping> 
    <servlet-mapping> 
     <servlet-name>AddRPAController</servlet-name> 
     <url-pattern>/AddRPAController</url-pattern> 
    </servlet-mapping> 
    <servlet-mapping> 
     <servlet-name>UpdateDeleteController</servlet-name> 
     <url-pattern>/UpdateDeleteController</url-pattern> 
    </servlet-mapping> 
    <servlet-mapping> 
     <servlet-name>DataDumpController</servlet-name> 
     <url-pattern>/DataDumpController</url-pattern> 
    </servlet-mapping> 
    <servlet-mapping> 
     <servlet-name>Main</servlet-name> 
     <url-pattern>/Main</url-pattern> 
    </servlet-mapping> 

    <servlet-mapping> 
     <servlet-name>SnoopServlet</servlet-name> 
     <url-pattern>/SnoopServlet</url-pattern> 
    </servlet-mapping> 

    <servlet-mapping> 
     <servlet-name>logon</servlet-name> 
     <url-pattern>/log4j_demo/logon</url-pattern> 
    </servlet-mapping> 

    <servlet-mapping> 
     <servlet-name>ForgotPassword</servlet-name> 
     <url-pattern>/log4j_demo/ForgotPassword</url-pattern> 
    </servlet-mapping> 
    <servlet-mapping> 
     <servlet-name>Register</servlet-name> 
     <url-pattern>/log4j_demo/Register</url-pattern> 
    </servlet-mapping> 
    <servlet-mapping> 
     <servlet-name>GetComments</servlet-name> 
     <url-pattern>/log4j_demo/GetComments</url-pattern> 
    </servlet-mapping> 


    <welcome-file-list> 
     <welcome-file>index.jsp</welcome-file> 
    </welcome-file-list> 

    <error-page> 
     <error-code>404</error-code> 
     <location>/jsp/error.jsp</location> 
    </error-page> 
<!-- <welcome-file-list> --> 
<!--  <welcome-file>index.html</welcome-file> --> 
<!--  <welcome-file>index.htm</welcome-file> --> 
<!--  <welcome-file>index.jsp</welcome-file> --> 
<!--  <welcome-file>default.html</welcome-file> --> 
<!--  <welcome-file>default.htm</welcome-file> --> 
<!--  <welcome-file>default.jsp</welcome-file> --> 
<!-- </welcome-file-list> --> 
</web-app>

Podsystem JSP w standalone.xml

<subsystem xmlns="urn:jboss:domain:web:2.2" default-virtual-server="default-host" native="false"> 
      <configuration> 
       <jsp-configuration development="true" java-encoding="ISO8859_1"/> 
      </configuration> 
      <connector name="http" protocol="HTTP/1.1" scheme="http" socket-binding="http"/> 
      <virtual-server name="default-host" enable-welcome-root="true"> 
       <alias name="localhost"/> 
       <alias name="example.com"/> 
      </virtual-server> 
     </subsystem>

Źródło

2017-12-05 davis

+0

Jest to bardzo trudne bez wyświetlenia kodu. Patrząc na stacktrace, istnieje wyjątek NullPointerException. Czy dzwonisz out.println (null)? – Santosh

+0

@santo jedyny out.print() w kodzie jest out.print (sdf.format (now.getTime())) ;, gdzie sdf to SimpleDateFormater. Plik jest zbyt długi, aby go udostępnić. :( – davis

+0

Oto jeden link, w którym znalazł się ten sam problem http://javafree.uol.com.br/topic-13194-Erro-ao-Gerar-PDF-iText-Strtus.html. – Santosh

Odpowiedz

1

Nie pracuję z JBoss, więc nie mogę powiedzieć, gdzie naprawić ten problem, ale StackTrace wyraźnie wskazuje, że system-property line.separator nie jest ustawiony lub nie może być poprawnie pobrany.

Z komentarzem @davis

mam ustawić właściwość wewnątrz .Properties złożyć, że mam i to działa!

Źródło

2017-12-14 15:07:31 Edwardth

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