解决Maven项目，无法显示src/main/java资源文件夹

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1. <?xml version="1.0" encoding="UTF-8"?>  
2. <classpath>  
3.     <classpathentry kind="src" output="target/test-classes" path="src/test/java">  
4.         <attributes>  
5.             <attribute name="optional" value="true"/>  
6.             <attribute name="maven.pomderived" value="true"/>  
7.         </attributes>  
8.     </classpathentry>  
9.     <classpathentry kind="src" path="src/main/java"/>  
10.     <classpathentry kind="src" path="src/main/resources"/>  
11.     <classpathentry kind="src" output="target/test-classes" path="src/test/resources"/>  
12.     <classpathentry kind="con" path="org.eclipse.m2e.MAVEN2_CLASSPATH_CONTAINER">  
13.         <attributes>  
14.             <attribute name="maven.pomderived" value="true"/>  
15.             <attribute name="org.eclipse.jst.component.dependency" value="/WEB-INF/lib"/>  
16.         </attributes>  
17.     </classpathentry>  
18.     <classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-1.6">  
19.         <attributes>  
20.             <attribute name="owner.project.facets" value="java"/>  
21.         </attributes>  
22.     </classpathentry>  
23.     <classpathentry kind="output" path="target/classes"/>  
24. </classpath>  

     会出现path属性为：src/main/java的classpathentry节点，这时删除我们需要新建的的节点就可以，比如 <classpathentry kind="src" path="src/main/java"/>。在Java Resources下重新建立src/main/java文件夹，就不会出现问题了。