java无法使用mainthread的上下文类加载器将web应用程序添加到@SpringBootApplication的内置Tomcat中
我正在尝试将war
作为独立jar
附带的web应用程序加载。当我的@SpringBootApplication
启动时,我提取war
文件并将其复制到文件系统。在那之后,我做了一个简单的tomcat.addWebapp()
调用,我希望它能起作用。但请看一看:
@Bean
public EmbeddedServletContainerFactory servletContainerFactory() {
return new TomcatEmbeddedServletContainerFactory() {
@Override
protected TomcatEmbeddedServletContainer getTomcatEmbeddedServletContainer(Tomcat tomcat) {
String appHome = System.getProperty(Environment.APP_HOME);
String targetFileName = "web-0.0.1-SNAPSHOT.war";
InputStream resourceAsStream = getClass().getClassLoader().getResourceAsStream(targetFileName);
File target = new File(Paths.get(appHome, targetFileName).toString());
try {
// Copy the file to the file system
java.nio.file.Files.copy(resourceAsStream, target.getAbsoluteFile().toPath(), StandardCopyOption.REPLACE_EXISTING);
// Add the web application and bind it to the context path /web
Context context = tomcat.addWebapp("/web", target.getAbsolutePath());
WebappLoader loader = new WebappLoader(Thread.currentThread().getContextClassLoader());
context.setLoader(loader);
} catch (ServletException ex) {
throw new IllegalStateException("Failed to add webapp", ex);
} catch(Exception e) {
throw new IllegalStateException("Failed to add webapp", e);
}
return super.getTomcatEmbeddedServletContainer(tomcat);
}
};
}
问题是在servletContainerFactory()
返回之后,我得到了FileNotFoundException
的吨。您可以看到完整的输出here,但它可以归结为:
java.io.IOException: Unable to create the directory [/tmp/tomcat.2878705033245220680.8080/webapps/web]
at org.apache.catalina.startup.ExpandWar.expand(ExpandWar.java:115) ~[tomcat-embed-core-8.5.11.jar:8.5.11]
at org.apache.catalina.startup.ContextConfig.fixDocBase(ContextConfig.java:615) [tomcat-embed-core-8.5.11.jar:8.5.11]
..
2017-02-12 19:39:44.393 INFO 10137 --- [ost-startStop-1] o.apache.catalina.startup.ContextConfig : No global web.xml found
2017-02-12 19:39:44.590 WARN 10137 --- [ost-startStop-1] o.a.tomcat.util.scan.StandardJarScanner : Failed to scan [file:/home/stefan/.m2/repository/org/bytedeco/javacv/1.3/javacpp-1.3.jar] from classloader hierarchy
..
java.io.FileNotFoundException: /home/stefan/.m2/repository/org/bytedeco/javacv/1.3/javacpp-1.3.jar (No such file or directory)
at java.util.zip.ZipFile.open(Native Method) ~[na:1.8.0_121]
at java.util.zip.ZipFile.<init>(ZipFile.java:219) ~[na:1.8.0_121]
..
2017-02-12 19:39:44.590 WARN 10137 --- [ost-startStop-1] o.a.tomcat.util.scan.StandardJarScanner : Failed to scan [file:/home/stefan/.m2/repository/org/bytedeco/javacv/1.3/opencv-3.1.0-1.3.jar] from classloader hierarchy
..
java.io.FileNotFoundException: /home/stefan/.m2/repository/org/bytedeco/javacv/1.3/opencv-3.1.0-1.3.jar (No such file or directory)
at java.util.zip.ZipFile.open(Native Method) ~[na:1.8.0_121]
at java.util.zip.ZipFile.<init>(ZipFile.java:219) ~[na:1.8.0_121]
..
2017-02-12 19:39:44.591 WARN 10137 --- [ost-startStop-1] o.a.tomcat.util.scan.StandardJarScanner : Failed to scan [file:/home/stefan/.m2/repository/org/bytedeco/javacv/1.3/ffmpeg-3.2.1-1.3.jar] from classloader hierarchy
..
java.io.FileNotFoundException: /home/stefan/.m2/repository/org/bytedeco/javacv/1.3/ffmpeg-3.2.1-1.3.jar (No such file or directory)
at java.util.zip.ZipFile.open(Native Method) ~[na:1.8.0_121]
at java.util.zip.ZipFile.<init>(ZipFile.java:219) ~[na:1.8.0_121]
..
最后一个例外是ClassNotFoundException
,它肯定与上述错误有关:
java.lang.ClassNotFoundException: org.apache.jasper.servlet.JspServlet
at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1285) ~[tomcat-embed-core-8.5.11.jar:8.5.11]
at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1119) ~[tomcat-embed-core-8.5.11.jar:8.5.11]
at org.apache.catalina.core.DefaultInstanceManager.loadClass(DefaultInstanceManager.java:520) ~[tomcat-embed-core-8.5.11.jar:8.5.11]
at org.apache.catalina.core.DefaultInstanceManager.loadClassMaybePrivileged(DefaultInstanceManager.java:501) ~[tomcat-embed-core-8.5.11.jar:8.5.11]
at org.apache.catalina.core.DefaultInstanceManager.newInstance(DefaultInstanceManager.java:118) ~[tomcat-embed-core-8.5.11.jar:8.5.11]
at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1050) ~[tomcat-embed-core-8.5.11.jar:8.5.11]
at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:989) ~[tomcat-embed-core-8.5.11.jar:8.5.11]
at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:4913) [tomcat-embed-core-8.5.11.jar:8.5.11]
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5223) [tomcat-embed-core-8.5.11.jar:8.5.11]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) [tomcat-embed-core-8.5.11.jar:8.5.11]
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1419) [tomcat-embed-core-8.5.11.jar:8.5.11]
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1409) [tomcat-embed-core-8.5.11.jar:8.5.11]
at java.util.concurrent.FutureTask.run(FutureTask.java:266) [na:1.8.0_121]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [na:1.8.0_121]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [na:1.8.0_121]
at java.lang.Thread.run(Thread.java:745) [na:1.8.0_121]
似乎所有依赖项都丢失了。问题是为了解决这个问题我必须做什么As suggested我还将tomcat-embed-core
依赖关系放在pom上。Spring应用程序的xml,但这不起作用
<dependency>
<groupId>org.apache.tomcat.embed</groupId>
<artifactId>tomcat-embed-core</artifactId>
<version>8.5.11</version>
</dependency>
感谢您的帮助
# 1 楼答案
对于
java.io.FileNotFoundException
,可以在https://stackoverflow.com/a/37857690中找到解决方案可以通过添加以下内容来修复
ClassNotFoundException
: