小贝子编程

加载WebappClassLoader时出错(获取错误)



我正在使用resteasy/jersy执行Web服务。在tomcat上运行时，我收到以下错误，但无法确定发生了什么。我清理并运行了很多次项目，但它不起作用。我使用maven添加依赖项。我的Stacktrace位于下方

Apr 14, 2015 7:21:43 PM org.apache.catalina.core.AprLifecycleListener init
INFO: The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: C:Program FilesJavajre7bin;C:WINDOWSSunJavabin;C:WINDOWSsystem32;C:WINDOWS;C:/Program Files/Java/jre7/bin/client;C:/Program Files/Java/jre7/bin;C:/Program Files/Java/jre7/lib/i386;C:WINDOWSsystem32;C:WINDOWS;C:WINDOWSSystem32Wbem;C:Program FilesMicrosoft SQL Server100ToolsBinn;C:Program FilesMicrosoft SQL Server100DTSBinn;D:javaeclipseeclipse;;.
Apr 14, 2015 7:21:43 PM org.apache.tomcat.util.digester.SetPropertiesRule begin
WARNING: [SetPropertiesRule]{Server/Service/Engine/Host/Context} Setting property 'source' to 'org.eclipse.jst.jee.server:SnapshotHealthApp' did not find a matching property.
Apr 14, 2015 7:21:43 PM org.apache.coyote.http11.Http11Protocol init
INFO: Initializing Coyote HTTP/1.1 on http-9999
Apr 14, 2015 7:21:43 PM org.apache.catalina.startup.Catalina load
INFO: Initialization processed in 394 ms
Apr 14, 2015 7:21:43 PM org.apache.catalina.core.StandardService start
INFO: Starting service Catalina
Apr 14, 2015 7:21:43 PM org.apache.catalina.core.StandardEngine start
INFO: Starting Servlet Engine: Apache Tomcat/6.0.43
Apr 14, 2015 7:21:43 PM org.apache.catalina.core.ApplicationContext log
INFO: Marking servlet jersey-serlvet as unavailable
Apr 14, 2015 7:21:43 PM org.apache.catalina.core.ApplicationContext log
SEVERE: Error loading WebappClassLoader
context: /SnapshotHealthApp
delegate: false
repositories:
/WEB-INF/classes/
----------> Parent Classloader:
org.apache.catalina.loader.StandardClassLoader@5a384a
com.sun.jersey.spi.container.servlet.ServletContainer
java.lang.ClassNotFoundException: com.sun.jersey.spi.container.servlet.ServletContainer
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1680)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1526)
at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1128)
at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:1026)
at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:4425)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:4738)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1060)
at org.apache.catalina.core.StandardHost.start(StandardHost.java:822)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1060)
at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:463)
at org.apache.catalina.core.StandardService.start(StandardService.java:525)
at org.apache.catalina.core.StandardServer.start(StandardServer.java:759)
at org.apache.catalina.startup.Catalina.start(Catalina.java:595)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:289)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414)
Apr 14, 2015 7:21:43 PM org.apache.catalina.core.StandardContext loadOnStartup
SEVERE: Servlet /SnapshotHealthApp threw load() exception
java.lang.ClassNotFoundException: com.sun.jersey.spi.container.servlet.ServletContainer
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1680)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1526)
at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1128)
at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:1026)
at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:4425)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:4738)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1060)
at org.apache.catalina.core.StandardHost.start(StandardHost.java:822)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1060)
at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:463)
at org.apache.catalina.core.StandardService.start(StandardService.java:525)
at org.apache.catalina.core.StandardServer.start(StandardServer.java:759)
at org.apache.catalina.startup.Catalina.start(Catalina.java:595)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:289)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414)
Apr 14, 2015 7:21:43 PM org.apache.coyote.http11.Http11Protocol start
INFO: Starting Coyote HTTP/1.1 on http-9999
Apr 14, 2015 7:21:43 PM org.apache.jk.common.ChannelSocket init
INFO: JK: ajp13 listening on /0.0.0.0:8009
Apr 14, 2015 7:21:43 PM org.apache.jk.server.JkMain start
INFO: Jk running ID=0 time=0/16  config=null
Apr 14, 2015 7:21:43 PM org.apache.catalina.startup.Catalina start
INFO: Server startup in 252 ms

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>SnapshotHealthApp</display-name>
<servlet>
<servlet-name>jersey-servlet</servlet-name>
<servlet-class>com.sun.jersey.spi.container.servlet.ServletContainer</servlet-class>
<init-param>
<param-name>com.sun.jersey.config.property.packages</param-name>
<param-value>com.snapshothealthapp.controller</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>jersey-servlet</servlet-name>
<url-pattern>/api/*</url-pattern>
</servlet-mapping>
</web-app>

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>snapshot</groupId>
<artifactId>snapshot</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>war</packaging>
<repositories>
<repository>
<id>maven2-repository.java.net</id>
<name>Java.net Repository for Maven</name>
<url>http://download.java.net/maven/2/</url>
<layout>default</layout>
</repository>
</repositories>
<dependencies>
<dependency>
<groupId>javax.ws.rs</groupId>
<artifactId>jsr311-api</artifactId>
<version>1.1.1</version>
</dependency>
<dependency>
<groupId>com.sun.jersey</groupId>
<artifactId>jersey-client</artifactId>
<version>1.9.1</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.8.2</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>com.google.code.gson</groupId>
<artifactId>gson</artifactId>
<version>2.2.4</version>
</dependency>
<dependency>
<groupId>com.googlecode.json-simple</groupId>
<artifactId>json-simple</artifactId>
<version>1.1</version>
</dependency>
<dependency>
<groupId>com.codesnippets4all</groupId>
<artifactId>quick-json</artifactId>
<version>1.0.4</version>
</dependency>
<dependency>
<groupId>org.json</groupId>
<artifactId>json</artifactId>
<version>20141113</version>
</dependency>
<dependency>
<groupId>org.codehaus.jackson</groupId>
<artifactId>jackson-mapper-asl</artifactId>
<version>1.8.5</version>
</dependency>
<dependency>
<groupId>javax.json</groupId>
<artifactId>javax.json-api</artifactId>
<version>1.0</version>
</dependency>
<dependency>
<groupId>com.sun.jersey</groupId>
<artifactId>jersey-servlet</artifactId>
<version>1.12</version>
</dependency>
<dependency>
<groupId>com.sun.jersey</groupId>
<artifactId>jersey-server</artifactId>
<version>1.8</version>
</dependency>
</dependencies>
<build>
<finalName>SnapshotHealthApp</finalName>
<plugins>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<compilerVersion>1.5</compilerVersion>
<source>1.5</source>
<target>1.5</target>
</configuration>
</plugin>
</plugins>
</build>
</project>

尝试了很多方法来解决上述错误。如有任何帮助，我们将不胜感激。。。。。

  1. 不要混合泽西岛版本。这个

    <dependency>
<groupId>com.sun.jersey</groupId>
<artifactId>jersey-servlet</artifactId>
<version>1.12</version>
</dependency>

    是将所有内容都拉进来的主要依赖项。所以你不需要

    <dependency>
<groupId>com.sun.jersey</groupId>
<artifactId>jersey-server</artifactId>
<version>1.8</version>
</dependency>

    把它扔掉。它将被拉入。并相应地更改jersey-client以匹配。

  2. 这个

    <dependency>
<groupId>javax.ws.rs</groupId>
<artifactId>jsr311-api</artifactId>
<version>1.1.1</version>
</dependency>

    是一场冲突。jersey-core-1.12将JAX-RSapi重新打包到其模块中，并且上面的jar与之冲突。

我的其他建议

  • 正如我所说，不要混合使用Jersey依赖版本。最好的做法是保留一个Maven属性，并将其用于所有Jersey依赖项

    <properties>
<jersey.version>1.12<jersey.version>
</properties>
...
<dependency>
<groupId>com.sun.jersey</groupId>
<artifactId>jersey-servlet</artifactId>
<version>${jersey.version}</version>
</dependency>

  • 除非你有严格的要求使用泽西1.12，否则我建议升级到1.19。这将引入您尝试使用的jsr311:1.1.1。

注意

这可能无法解决问题，因为我无法复制ClassNotFoundException，但我能够产生由您的依赖关系引起的其他异常。我想一旦加载了ServletContainer，就会导致另一个问题。

我建议您在部署应用程序时查看Tomcatwebapps目录，看看是否所有jar都在应用程序的WEB-INF/lib中。也许这些罐子不是随着战争而建的。

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