直接使用java启动下面的main函数,发现Jetty没有到WEB-INF/lib
下面的JAR。代码如下:
/**
* 启动器
*/
public class Launcher {
public static void main(String args[]) throws Exception {
new Launcher().start();
}
void start() throws Exception {
// 服务器的监听端口
Server server = new Server(80);
// 关联一个已经存在的上下文
WebAppContext context = new WebAppContext();
// 设置描述符位置
String path = Launcher.class.getResource("/").getPath();
context.setDescriptor(path + "../web.xml");
// 设置Web内容上下文路径
context.setResourceBase(path + "/../../");
// 设置上下文路径
context.setContextPath("/admin/");
context.setParentLoaderPriority(true);
//开启HTML,CSS,JS热部署
context.setInitParameter("org.eclipse.jetty.servlet.Default.useFileMappedBuffer", "false");
server.setHandler(context);
// 启动
server.start();
server.join();
}
}
错误日志:
2016-06-05 17:01:13.080 [main] ERROR o.s.web.servlet.DispatcherServlet - Context initialization failed
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'addressConsigneeIo' defined in file [D:\Project\CORP\EP\netease-ep\trunk\WebContent\WEB-INF\classes\org\darkgem\io\address\AddressConsigneeIo.class]: Post-processing failed of bean type [class org.darkgem.io.address.AddressConsigneeIo] failed; nested exception is java.lang.IllegalStateException: Failed to introspect bean class [org.darkgem.io.address.AddressConsigneeIo] for resource metadata: could not find class that it depends on
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyMergedBeanDefinitionPostProcessors(AbstractAutowireCapableBeanFactory.java:940)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:518)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:772)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:839)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:538)
at org.springframework.web.servlet.FrameworkServlet.configureAndRefreshWebApplicationContext(FrameworkServlet.java:667)
at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:633)
at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:681)
at org.springframework.web.servlet.FrameworkServlet.initWebApplicationContext(FrameworkServlet.java:552)
at org.springframework.web.servlet.FrameworkServlet.initServletBean(FrameworkServlet.java:493)
at org.springframework.web.servlet.HttpServletBean.init(HttpServletBean.java:136)
at javax.servlet.GenericServlet.init(GenericServlet.java:244)
at org.eclipse.jetty.servlet.ServletHolder.initServlet(ServletHolder.java:640)
at org.eclipse.jetty.servlet.ServletHolder.initialize(ServletHolder.java:419)
at org.eclipse.jetty.servlet.ServletHandler.initialize(ServletHandler.java:875)
at org.eclipse.jetty.servlet.ServletContextHandler.startContext(ServletContextHandler.java:348)
at org.eclipse.jetty.webapp.WebAppContext.startWebapp(WebAppContext.java:1379)
at org.eclipse.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1341)
at org.eclipse.jetty.server.handler.ContextHandler.doStart(ContextHandler.java:774)
at org.eclipse.jetty.servlet.ServletContextHandler.doStart(ServletContextHandler.java:261)
at org.eclipse.jetty.webapp.WebAppContext.doStart(WebAppContext.java:517)
at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68)
at org.eclipse.jetty.util.component.ContainerLifeCycle.start(ContainerLifeCycle.java:132)
at org.eclipse.jetty.server.Server.start(Server.java:405)
at org.eclipse.jetty.util.component.ContainerLifeCycle.doStart(ContainerLifeCycle.java:106)
at org.eclipse.jetty.server.handler.AbstractHandler.doStart(AbstractHandler.java:61)
at org.eclipse.jetty.server.Server.doStart(Server.java:372)
at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68)
at org.darkgem.jetty.Launcher.start(Launcher.java:31)
at org.darkgem.jetty.Launcher.main(Launcher.java:11)
Caused by: java.lang.IllegalStateException: Failed to introspect bean class [org.darkgem.io.address.AddressConsigneeIo] for resource metadata: could not find class that it depends on
at org.springframework.context.annotation.CommonAnnotationBeanPostProcessor.findResourceMetadata(CommonAnnotationBeanPostProcessor.java:334)
at org.springframework.context.annotation.CommonAnnotationBeanPostProcessor.postProcessMergedBeanDefinition(CommonAnnotationBeanPostProcessor.java:287)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyMergedBeanDefinitionPostProcessors(AbstractAutowireCapableBeanFactory.java:935)
... 34 common frames omitted
Caused by: java.lang.NoClassDefFoundError: Lorg/springframework/jdbc/core/JdbcTemplate;
at java.lang.Class.getDeclaredFields0(Native Method)
at java.lang.Class.privateGetDeclaredFields(Class.java:2583)
at java.lang.Class.getDeclaredFields(Class.java:1916)
at org.springframework.util.ReflectionUtils.getDeclaredFields(ReflectionUtils.java:710)
at org.springframework.util.ReflectionUtils.doWithLocalFields(ReflectionUtils.java:652)
at org.springframework.context.annotation.CommonAnnotationBeanPostProcessor.buildResourceMetadata(CommonAnnotationBeanPostProcessor.java:351)
at org.springframework.context.annotation.CommonAnnotationBeanPostProcessor.findResourceMetadata(CommonAnnotationBeanPostProcessor.java:330)
... 36 common frames omitted
Caused by: java.lang.ClassNotFoundException: org.springframework.jdbc.core.JdbcTemplate
at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 43 common frames omitted
天蓬老师2017-04-18 09:08:36
启动的时候,使用 java -cp jetty.jar;WebContentWEB-INFclasses Launcher
启动项目。java -cp jetty.jar;WebContentWEB-INFclasses Launcher
启动项目。
从错误日志可以看出是因为找不到 org.springframework.core.JdbcTemplate
这个类。而发生的问题的源码位于 classes
下面的业务代码中。
所以形成了一个:
AppClassloader(业务代码,依赖spring.jar)
|
WebAppClssLoader(WEB-INF\lib\spring.jar)
这样子的依赖结构,所以在初始化Spring 容器的时候,初始化一个AppCloassLoader
中的类(依赖Spring)发现无法查询到JdbcTemplate
这个Spring类。这是因为加载器的双亲委托机制
。
解决方法:
启动的时候指定所有的lib和jar
或者强制指定,不使用启动jetty Launcher加载的classpath: context.setParentLoaderPriority(false);
使用一个 start.jar这种封装好的jetty启动器来启动,启动的时候,还是需要指定具体的classpath
org.springframework.core.JdbcTemplate
这个类。而发生的问题的源码位于 classes
下面的业务代码中。package org.darkgem.jetty;
import org.eclipse.jetty.server.Server;
import org.eclipse.jetty.webapp.WebAppContext;
import java.io.File;
import java.io.FilenameFilter;
/**
* 启动器
*/
public class Launcher {
public static void main(String args[]) throws Exception {
if (args.length == 0) {
System.err.println("no web-app path");
return;
}
String path = args[0];
// 服务器的监听端口
Server server = new Server(80);
// 关联一个已经存在的上下文
WebAppContext context = new WebAppContext();
context.setDescriptor(path + "/WEB-INF/web.xml");
// 设置Web内容上下文路径
context.setResourceBase(path);
// 设置上下文路径
context.setContextPath("/admin/");
context.setParentLoaderPriority(true);
{
StringBuilder sb = new StringBuilder();
{
sb.append(path);
sb.append("/WEB-INF/classes");
sb.append(";");
}
{
File libDir = new File(path + "/WEB-INF/lib");
if (libDir.exists() && libDir.isDirectory()) {
for (File jar : libDir.listFiles(new FilenameFilter() {
@Override
public boolean accept(File dir, String name) {
if (name.endsWith(".zip") || name.endsWith(".jar")) {
return true;
}
return false;
}
})) {
sb.append(jar.getAbsolutePath());
sb.append(";");
}
}
}
System.out.println(sb.toString());
context.setExtraClasspath(sb.toString());
}
//开启HTML,CSS,JS热部署
context.setInitParameter("org.eclipse.jetty.servlet.Default.useFileMappedBuffer", "false");
server.setHandler(context);
// 启动
server.start();
server.join();
}
}
🎜这样子的依赖结构,所以在初始化Spring 容器的时候,初始化一个AppCloassLoader
中的类(依赖Spring)发现无法查询到JdbcTemplate
这个Spring类。这是因为加载器的双亲委托机制
。🎜
🎜解决方法:🎜
context.setParentLoaderPriority(false);
🎜🎜
classpath
🎜🎜
🎜
rrreee