我的问题是，在关闭eclipse之后，保存工作区甚至在两个小时之后都没有完成，这使得我根本无法在eclipse上做任何事情。我签入了c:..\workspace.metadata.log，错误是：

!ENTRY org.eclipse.jdt.ui 4 10001 2016-12-25 12:51:13.037
!MESSAGE Internal Error
!STACK 1
Java Model Exception: Core Exception [code 3] Some characters cannot be mapped using "Cp1252" character encoding.
Either change the encoding or remove the characters which are not supported by the "Cp1252" character encoding.
    at org.eclipse.jdt.internal.ui.javaeditor.DocumentAdapter.save(DocumentAdapter.java:474)
    at org.eclipse.jdt.internal.core.CommitWorkingCopyOperation.executeOperation(CommitWorkingCopyOperation.java:123)
    at org.eclipse.jdt.internal.core.JavaModelOperation.run(JavaModelOperation.java:729)
    at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:2313)
    at org.eclipse.jdt.internal.core.JavaModelOperation.runOperation(JavaModelOperation.java:794)
    at org.eclipse.jdt.internal.core.CompilationUnit.commitWorkingCopy(CompilationUnit.java:391)
    at org.eclipse.jdt.ui.wizards.NewTypeWizardPage.createType(NewTypeWizardPage.java:2233)
    at org.eclipse.jdt.internal.ui.wizards.NewClassCreationWizard.finishPage(NewClassCreationWizard.java:71)
    at org.eclipse.jdt.internal.ui.wizards.NewElementWizard$2.run(NewElementWizard.java:118)
    at org.eclipse.jdt.internal.core.BatchOperation.executeOperation(BatchOperation.java:39)
    at org.eclipse.jdt.internal.core.JavaModelOperation.run(JavaModelOperation.java:729)
    at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:2313)
    at org.eclipse.jdt.core.JavaCore.run(JavaCore.java:5358)
    at org.eclipse.jdt.internal.ui.actions.WorkbenchRunnableAdapter.run(WorkbenchRunnableAdapter.java:106)
    at org.eclipse.jface.operation.ModalContext$ModalContextThread.run(ModalContext.java:122)
Caused by: java.nio.charset.UnmappableCharacterException: Input length = 1
    at java.nio.charset.CoderResult.throwException(Unknown Source)
    at java.nio.charset.CharsetEncoder.encode(Unknown Source)
    at org.eclipse.core.internal.filebuffers.ResourceTextFileBuffer.commitFileBufferContent(ResourceTextFileBuffer.java:366)
    at org.eclipse.core.internal.filebuffers.ResourceFileBuffer.commit(ResourceFileBuffer.java:327)
    at org.eclipse.jdt.internal.ui.javaeditor.DocumentAdapter.save(DocumentAdapter.java:472)
    ... 14 more
Caused by: org.eclipse.core.runtime.CoreException: Some characters cannot be mapped using "Cp1252" character encoding.
Either change the encoding or remove the characters which are not supported by the "Cp1252" character encoding.
    at org.eclipse.core.internal.filebuffers.ResourceTextFileBuffer.commitFileBufferContent(ResourceTextFileBuffer.java:378)
    at org.eclipse.core.internal.filebuffers.ResourceFileBuffer.commit(ResourceFileBuffer.java:327)
    at org.eclipse.jdt.internal.ui.javaeditor.DocumentAdapter.save(DocumentAdapter.java:472)
    at org.eclipse.jdt.internal.core.CommitWorkingCopyOperation.executeOperation(CommitWorkingCopyOperation.java:123)
    at org.eclipse.jdt.internal.core.JavaModelOperation.run(JavaModelOperation.java:729)
    at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:2313)
    at org.eclipse.jdt.internal.core.JavaModelOperation.runOperation(JavaModelOperation.java:794)
    at org.eclipse.jdt.internal.core.CompilationUnit.commitWorkingCopy(CompilationUnit.java:391)
    at org.eclipse.jdt.ui.wizards.NewTypeWizardPage.createType(NewTypeWizardPage.java:2233)
    at org.eclipse.jdt.internal.ui.wizards.NewClassCreationWizard.finishPage(NewClassCreationWizard.java:71)
    at org.eclipse.jdt.internal.ui.wizards.NewElementWizard$2.run(NewElementWizard.java:118)
    at org.eclipse.jdt.internal.core.BatchOperation.executeOperation(BatchOperation.java:39)
    at org.eclipse.jdt.internal.core.JavaModelOperation.run(JavaModelOperation.java:729)
    at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:2313)
    at org.eclipse.jdt.core.JavaCore.run(JavaCore.java:5358)
    at org.eclipse.jdt.internal.ui.actions.WorkbenchRunnableAdapter.run(WorkbenchRunnableAdapter.java:106)
    at org.eclipse.jface.operation.ModalContext$ModalContextThread.run(ModalContext.java:122)
Caused by: java.nio.charset.UnmappableCharacterException: Input length = 1
    at java.nio.charset.CoderResult.throwException(Unknown Source)
    at java.nio.charset.CharsetEncoder.encode(Unknown Source)
    at org.eclipse.core.internal.filebuffers.ResourceTextFileBuffer.commitFileBufferContent(ResourceTextFileBuffer.java:366)
    ... 16 more

问题是我不知道如何在不打开eclipse的情况下修复它（我不能，因为它保存了工作区）。
我会非常感谢你的帮助。
对不起，我的英语不是以英语为母语的。