在STS中启动jetty时报错

[Jonas_peng]

java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.eclipse.jetty.start.Main.invokeMain(Main.java:469)
at org.eclipse.jetty.start.Main.start(Main.java:612)
at org.eclipse.jetty.start.Main.parseCommandLine(Main.java:265)
at org.eclipse.jetty.start.Main.main(Main.java:79)
Caused by: java.lang.NoClassDefFoundError: javax/transaction/UserTransaction
at java.lang.Class.getDeclaredConstructors0(Native Method)
at java.lang.Class.privateGetDeclaredConstructors(Class.java:2483)
at java.lang.Class.getConstructors(Class.java:1507)
at org.eclipse.jetty.xml.XmlConfiguration$JettyXmlConfiguration.newObj(XmlConfiguration.java:748)
at org.eclipse.jetty.xml.XmlConfiguration$JettyXmlConfiguration.configure(XmlConfiguration.java:383)
at org.eclipse.jetty.xml.XmlConfiguration$JettyXmlConfiguration.configure(XmlConfiguration.java:335)
at org.eclipse.jetty.xml.XmlConfiguration.configure(XmlConfiguration.java:288)
at org.eclipse.jetty.xml.XmlConfiguration$1.run(XmlConfiguration.java:1191)
at java.security.AccessController.doPrivileged(Native Method)
at org.eclipse.jetty.xml.XmlConfiguration.main(XmlConfiguration.java:1126)
... 8 more
Caused by: java.lang.ClassNotFoundException: javax.transaction.UserTransaction
at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 18 more

Usage: java -jar start.jar [options] [properties] [configs]
java -jar start.jar --help # for more information

在网上找了很多资料，不知道缺少了哪个jar包，求各位大神帮忙，在线等