windows环境下启动start_windwos.bat报如下错误：
application server start completed.

• port: 20020.

Exception in thread "main" java.lang.NoClassDefFoundError: org/eclipse/jetty/proxy/AsyncProxyServlet
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:763)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:468)
at java.net.URLClassLoader.access$100(URLClassLoader.java:74)
at java.net.URLClassLoader$1.run(URLClassLoader.java:369)
at java.net.URLClassLoader$1.run(URLClassLoader.java:363)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:362)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:349)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
at com.x.server.console.server.web.WebServerTools.proxyCenter(WebServerTools.java:136)
at com.x.server.console.server.web.WebServerTools.start(WebServerTools.java:114)
at com.x.server.console.server.Servers.startWebServer(Servers.java:73)
at com.x.server.console.Main.startWebServer(Main.java:372)
at com.x.server.console.Main.startAll(Main.java:413)
at com.x.server.console.Main.main(Main.java:136)
Caused by: java.lang.ClassNotFoundException: org.eclipse.jetty.proxy.AsyncProxyServlet
at java.net.URLClassLoader.findClass(URLClassLoader.java:382)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:349)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 18 more