eclipse启动不了，

edsion 2006-05-07 04:01:04

一段时间没用。一启动就报错
下面是日志文件的内容
高手帮我看看
是怎么回事
!SESSION 四月 16, 2006 07:57:32.515 ----------------------------------------------
eclipse.buildId=M200503110845
java.version=1.3.1_01
java.vendor=Sun Microsystems Inc.
BootLoader constants: OS=win32, ARCH=x86, WS=win32, NL=zh_CN

!ENTRY org.eclipse.osgi 四月 16, 2006 07:57:32.515
!MESSAGE Error registering XML parser services.
!STACK 0
java.lang.ClassNotFoundException: javax.xml.parsers.SAXParserFactory
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClassInternal(Unknown Source)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Unknown Source)
at org.eclipse.core.runtime.adaptor.EclipseAdaptor.registerEndorsedXMLParser(EclipseAdaptor.java:272)
at org.eclipse.core.runtime.adaptor.EclipseAdaptor.frameworkStart(EclipseAdaptor.java:253)
at org.eclipse.osgi.framework.internal.core.SystemBundleActivator.start(SystemBundleActivator.java:61)
at org.eclipse.osgi.framework.internal.core.BundleContextImpl$1.run(BundleContextImpl.java:958)
at java.security.AccessController.doPrivileged(Native Method)
at org.eclipse.osgi.framework.internal.core.BundleContextImpl.startActivator(BundleContextImpl.java:954)
at org.eclipse.osgi.framework.internal.core.BundleContextImpl.start(BundleContextImpl.java:937)
at org.eclipse.osgi.framework.internal.core.StartLevelManager.resumeBundles(StartLevelManager.java:553)
at org.eclipse.osgi.framework.internal.core.StartLevelManager.incFWSL(StartLevelManager.java:477)
at org.eclipse.osgi.framework.internal.core.StartLevelManager.doSetStartLevel(StartLevelManager.java:273)
at org.eclipse.osgi.framework.internal.core.StartLevelManager.launch(StartLevelManager.java:243)
at org.eclipse.osgi.framework.internal.core.SystemBundle.resume(SystemBundle.java:166)
at org.eclipse.osgi.framework.internal.core.Framework.launch(Framework.java:425)
at org.eclipse.osgi.framework.internal.core.OSGi.launch(OSGi.java:51)
at org.eclipse.core.runtime.adaptor.EclipseStarter.startup(EclipseStarter.java:216)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:127)
at java.lang.reflect.Method.invoke(Native Method)
at org.eclipse.core.launcher.Main.basicRun(Main.java:185)
at org.eclipse.core.launcher.Main.run(Main.java:704)
at org.eclipse.core.launcher.Main.main(Main.java:688)

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