eclipse提示java compiler level does not match the version of the installed java

    eclipse提示“Java compiler level does not match the version of the installed java project facet”的解决办法：     在项目的根目录下有个.settings文件夹，用文本编辑软件打开.settings文件夹下的org.eclipse.wst.common.project.facet.core.xml文

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