title: Workspace defines a VM that does not contain a valid jre/lib/rt.jar: C:\Program Files\Java\jre7
body: <p>I am new to maven and i have been creating simple web application with maven using hibernate, spring etc. i get following error occur when i run <code>mvn eclipse:eclipse</code> command.</p>
  <pre><code>[WARNING] Workspace defines a VM that does not contain a valid jre/lib/rt.jar: C:\Program Files\Java\jre7
  [WARNING] could not read workspace project:c:\Users\Acer\workspace\.metadata\.plugins\org.eclipse.core.resources\.projects\myproject
  org.codehaus.plexus.util.xml.pull.XmlPullParserException: processing instruction can not have PITarget with reserveld xml name (position: START_D
  OCUMENT seen \r\n&lt;?xml ... @2:7)
          at org.codehaus.plexus.util.xml.pull.MXParser.parsePI(MXParser.java:2453)
          at org.codehaus.plexus.util.xml.pull.MXParser.parseProlog(MXParser.java:1447)
          at org.codehaus.plexus.util.xml.pull.MXParser.nextImpl(MXParser.java:1395)
          at org.codehaus.plexus.util.xml.pull.MXParser.next(MXParser.java:1093)
          at org.codehaus.plexus.util.xml.Xpp3DomBuilder.build(Xpp3DomBuilder.java:187)
          at org.codehaus.plexus.util.xml.Xpp3DomBuilder.build(Xpp3DomBuilder.java:83)
          at org.codehaus.plexus.util.xml.Xpp3DomBuilder.build(Xpp3DomBuilder.java:48)
          at org.apache.maven.plugin.eclipse.reader.ReadWorkspaceLocations.readArtefact(ReadWorkspaceLocations.java:341)
          at org.apache.maven.plugin.eclipse.reader.ReadWorkspaceLocations.readWorkspace(ReadWorkspaceLocations.java:536)
          at org.apache.maven.plugin.eclipse.reader.ReadWorkspaceLocations.init(ReadWorkspaceLocations.java:94)
          at org.apache.maven.plugin.eclipse.EclipsePlugin.getWorkspaceConfiguration(EclipsePlugin.java:2063)
          at org.apache.maven.plugin.eclipse.EclipsePlugin.fillDefaultClasspathContainers(EclipsePlugin.java:1580)
          at org.apache.maven.plugin.eclipse.EclipsePlugin.setup(EclipsePlugin.java:978)
          at org.apache.maven.plugin.ide.AbstractIdeSupportMojo.execute(AbstractIdeSupportMojo.java:500)
          at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:101)
          at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:209)
          at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:153)
          at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:145)
          at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:84)
          at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:59)
          at org.apache.maven.lifecycle.internal.LifecycleStarter.singleThreadedBuild(LifecycleStarter.java:183)
          at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:161)
          at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:320)
          at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:156)
          at org.apache.maven.cli.MavenCli.execute(MavenCli.java:537)
          at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:196)
          at org.apache.maven.cli.MavenCli.main(MavenCli.java:141)
          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:601)
          at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:290)
          at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:230)
          at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:409)
          at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:352)
  [INFO] no substring wtp server match.
  </code></pre>
  <p>this is my <a href="http://pastebin.com/KEiNw2e5" rel="nofollow noreferrer">pom.xml</a></p>
  <p>could anybody tell me what i am doing wrong here. thanks in advance for any help</p>