Spring MVC 4 Hello World StandardWrapper.Throwable java.lang.NullPointerException

我正在使用項目和GlassFish v2.1的Maven結構來執行此應用程序。Spring MVC 4 Hello World StandardWrapper.Throwable java.lang.NullPointerException

我的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>com.spring.proj3</groupId> 
<artifactId>Spring4MVCApp</artifactId> 
<packaging>war</packaging> 
<version>1.0-SNAPSHOT</version> 
<name>Spring4MVCApp Maven Webapp</name> 
<url>http://maven.apache.org</url> 

<properties> 
    <java-version>1.7</java-version> 
    <org.springframework-version>4.0.3.RELEASE</org.springframework-version> 
    <org.springframework.security-version>3.2.3.RELEASE</org.springframework.security-version> 
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> 
</properties> 


<dependencies> 
    <dependency> 
     <groupId>junit</groupId> 
     <artifactId>junit</artifactId> 
     <version>4.12</version> 
     <scope>test</scope> 
    </dependency> 

    <dependency> 
     <groupId>javax.servlet</groupId> 
     <artifactId>servlet-api</artifactId> 
     <version>2.5</version> 
     <scope>provided</scope> 
    </dependency> 
    <dependency> 
     <groupId>javax.servlet</groupId> 
     <artifactId>jsp-api</artifactId> 
     <version>2.0</version> 
     <scope>provided</scope> 
    </dependency> 
    <dependency> 
     <groupId>javax.servlet</groupId> 
     <artifactId>jstl</artifactId> 
     <version>1.2</version> 
     <scope>provided</scope> 
    </dependency> 

    <!-- Spring --> 
    <!-- Spring Dependencies --> 
    <!-- Spring --> 
    <dependency> 
     <groupId>org.springframework</groupId> 
     <artifactId>spring-context</artifactId> 
     <version>${org.springframework-version}</version> 
     <exclusions> 
      <!-- Exclude Commons Logging in favor of SLF4j --> 
      <exclusion> 
       <groupId>commons-logging</groupId> 
       <artifactId>commons-logging</artifactId> 
      </exclusion> 
     </exclusions> 
    </dependency> 
    <dependency> 
     <groupId>org.springframework</groupId> 
     <artifactId>spring-web</artifactId> 
     <version>${org.springframework-version}</version> 
    </dependency> 
    <dependency> 
     <groupId>org.springframework</groupId> 
     <artifactId>spring-webmvc</artifactId> 
     <version>${org.springframework-version}</version> 
    </dependency> 
</dependencies> 
<build> 
    <plugins> 
    <plugin> 
     <groupId>org.apache.maven.plugins</groupId> 
     <artifactId>maven-compiler-plugin</artifactId> 
     <configuration> 
     <source>1.7</source> 
     <target>1.7</target> 
     </configuration> 
    </plugin> 
    <plugin> 
     <groupId>org.apache.maven.plugins</groupId> 
     <artifactId>maven-resources-plugin</artifactId> 
     <version>2.4</version> 
    </plugin> 
    </plugins> 

    <finalName>SpringSample2</finalName> 

</build>

我的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/javaee/web-app_2_5.xsd" 
id="WebApp_ID" version="2.5"> 

<display-name>Archetype Created Web Application</display-name> 

<servlet> 
<servlet-name>dispatcher</servlet-name> 
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> 
<load-on-startup>1</load-on-startup> 
</servlet> 

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

<context-param> 
<param-name>contextConfigLocation</param-name> 
<param-value>/WEB-INF/dispatcher-servlet.xml</param-value> 
</context-param> 

<listener> 
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> 
</listener> 
</web-app>

調度-servlet.xml中

<beans xmlns="http://www.springframework.org/schema/beans" 
xmlns:context="http://www.springframework.org/schema/context" 
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
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"> 

<context:component-scan base-package="com.javahash.spring.controller" /> 

<bean 
    class="org.springframework.web.servlet.view.InternalResourceViewResolver"> 
    <property name="prefix"> 
     <value>/WEB-INF/views/</value> 
    </property> 
    <property name="suffix"> 
     <value>.jsp</value> 
    </property> 
</bean>

控制器

package com.javahash.spring.controller; 

import org.springframework.stereotype.Controller; 
import org.springframework.ui.Model; 
import org.springframework.web.bind.annotation.RequestMapping; 
import org.springframework.web.bind.annotation.RequestParam; 

@Controller 
public class HelloWorldController { 

@RequestMapping("/hello") 
public String hello(
     @RequestParam(value = "name", required = false, defaultValue = "World") String name, 
     Model model) { 
    model.addAttribute("name", name); 
    return "helloworld"; 
    } 

}

我的問題：

無法部署代碼獲得上述錯誤的稱號。

步驟嘗試：

（一）修改web.xml中時的頂配版本 - 沒有工作（二）不同的，更春末的版本。

這裏什麼都不起作用。

堆棧跟蹤

Severe: WebModule[/Spring4MVCApp]StandardWrapper.Throwable 
java.lang.NullPointerException 
at  org.springframework.core.SerializableTypeWrapper$TypeProxyInvocationHandler.invoke(SerializableTypeWrapper.java:239) 
at org.springframework.core.$Proxy34.hashCode(Unknown Source) 
at org.springframework.util.ObjectUtils.nullSafeHashCode(ObjectUtils.java:273) 
at org.springframework.core.ResolvableType.hashCode(ResolvableType.java:794) 
at org.springframework.util.ConcurrentReferenceHashMap.getHash(ConcurrentReferenceHashMap.java:214) 
at org.springframework.util.ConcurrentReferenceHashMap.getReference(ConcurrentReferenceHashMap.java:246) 
at org.springframework.util.ConcurrentReferenceHashMap.get(ConcurrentReferenceHashMap.java:226) 
at org.springframework.core.ResolvableType.forType(ResolvableType.java:1169) 
at org.springframework.core.ResolvableType.forType(ResolvableType.java:1148) 
at org.springframework.core.ResolvableType.forTypes(ResolvableType.java:827) 
at org.springframework.core.ResolvableType.getInterfaces(ResolvableType.java:403) 
at org.springframework.core.ResolvableType.as(ResolvableType.java:365) 

Severe: WebModule[/Spring4MVCApp]PWC1396: Servlet /Spring4MVCApp threw load() exception 
java.lang.NullPointerException 
at  org.springframework.core.SerializableTypeWrapper$TypeProxyInvocationHandler.invoke(SerializableTypeWrapper.java:239) 
at org.springframework.core.$Proxy34.hashCode(Unknown Source) 
at org.springframework.util.ObjectUtils.nullSafeHashCode(ObjectUtils.java:273) 
at org.springframework.core.ResolvableType.hashCode(ResolvableType.java:794) 
at org.springframework.util.ConcurrentReferenceHashMap.getHash(ConcurrentReferenceHashMap.java:214) 
at org.springframework.util.ConcurrentReferenceHashMap.getReference(ConcurrentReferenceHashMap.java:246) 
at org.springframework.util.ConcurrentReferenceHashMap.get(ConcurrentReferenceHashMap.java:226) 
at org.springframework.core.ResolvableType.forType(ResolvableType.java:1169) 
at org.springframework.core.ResolvableType.forType(ResolvableType.java:1148) 
at org.springframework.core.ResolvableType.forTypes(ResolvableType.java:827) 
at org.springframework.core.ResolvableType.getInterfaces(ResolvableType.java:403) 
at org.springframework.core.ResolvableType.as(ResolvableType.java:365) 
at org.springframework.core.convert.support.GenericConversionService.getRequiredTypeInfo(GenericConversionService.java:266) 

Severe: ContainerBase.addChild: start: 
LifecycleException: java.lang.NullPointerException 
at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:4927) 
at org.apache.catalina.core.StandardContext.start(StandardContext.java:5324) 
at com.sun.enterprise.web.WebModule.start(WebModule.java:353) 
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:989) 
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:973) 
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:704) 
at com.sun.enterprise.web.WebContainer.loadWebModule(WebContainer.java:1627) 
at com.sun.enterprise.web.WebContainer.loadWebModule(WebContainer.java:1232) 
at com.sun.enterprise.server.WebModuleDeployEventListener.moduleDeployed(WebModuleDeployEventListener.java:182) 
at com.sun.enterprise.server.WebModuleDeployEventListener.moduleDeployed(WebModuleDeployEventListener.java:278) 
at com.sun.enterprise.admin.event.AdminEventMulticaster.invokeModuleDeployEventListener(AdminEventMulticaster.java:1005) 
at com.sun.enterprise.admin.event.AdminEventMulticaster.handleModuleDeployEvent(AdminEventMulticaster.java:992) 
at com.sun.enterprise.admin.event.AdminEventMulticaster.processEvent(AdminEventMulticaster.java:470) 
at com.sun.enterprise.admin.event.AdminEventMulticaster.multicastEvent(AdminEventMulticaster.java:182) 
at com.sun.enterprise.admin.server.core.DeploymentNotificationHelper.multicastEvent(DeploymentNotificationHelper.java:308) 
at com.sun.enterprise.deployment.phasing.DeploymentServiceUtils.multicastEvent(DeploymentServiceUtils.java:231) 
at com.sun.enterprise.deployment.phasing.ServerDeploymentTarget.sendStartEvent(ServerDeploymentTarget.java:298) 
at com.sun.enterprise.deployment.phasing.ApplicationStartPhase.runPhase(ApplicationStartPhase.java:132)

出現剪切數低於他們每個人由於空間的限制

來源

2015-01-14 swateek

張貼堆棧跟蹤 –

請檢查現在的問題@JigarJoshi – swateek

您排除'公地logging'（你應該從'彈簧core'不'彈簧context'排除使它棒），但不要不包括SLF4J（根據您要使用的評論來判斷）。你也在使用一個非常古老的應用服務器，你真的需要glassfish嗎？嘗試一個普通的tomcat。 –

-1

的線條從下面的pom.xml依賴刪除。
春天真的不需要在你的舞臺上。

<dependency> 
     <groupId>org.springframework</groupId> 
     <artifactId>spring-web</artifactId> 
     <version>${org.springframework-version}</version> 
</dependency>

來源

2015-01-14 08:31:59

這沒有任何意義，儘管刪除的確如此，因爲它已經包含了'spring-webmvc'依賴項，因爲它依賴於'spring-web'。 –

沒有對不起葉..我不認爲這會工作。 – swateek

Spring MVC 4 Hello World StandardWrapper.Throwable java.lang.NullPointerException

回答

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