.classpath和jdk jre jar schema

<classpathentry kind="con" path="melibrary.com.genuitec.eclipse.j2eedt.core.MYECLIPSE_JAVAEE_5_CONTAINER"/> is related to jdk jre, the interface operation can change



the schema in different configuration files of the jar package version and the

java compiler level does not match the version of the installed java project facet: The level of the Java compiler does not match the version of the installed Java project facet. How to solve this problem?
Right-click project "Properties", on the left side of the pop-up "Properties" window, click "Project" Facets" to open the Project Facets page. In the "Java" drop-down list on the page, select the corresponding version and it's OK