在練習eclipse建立maven web工程時,工程下只有src/main/resources目錄(顯然這種結構是不對的),沒有相應的src/main/java, src/test/java,src/test/resources這三個目錄,具體原因不太清楚,估計是eclipse建立maven web 專案時候的bug吧.
解決辦法:
1.開啟Navigator檢視
2.找到.classpath檔案,複製以下內容

<classpath>
    <classpathentry kind="src" output="target/classes" path
 
="src/main/java"/>
    <classpathentry excluding="**" kind="src" output="target/classes" path="src/main/resources"/>
    <classpathentry kind="src" output="target/test-classes" path="src/test/java"/>
    <classpathentry excluding="**" kind="src" output="target/test-classes" path="src/test/resources"
 
/>
    <classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER"/>
    <classpathentry kind="con" path="org.eclipse.m2e.MAVEN2_CLASSPATH_CONTAINER">
        <attributes>
            <attribute name="org.eclipse.jst.component.dependency" value="/WEB-INF/lib"/>
        </attributes
 
>
    </classpathentry>
    <classpathentry kind="output" path="target/classes"/>
</classpath>

3.重新building時候可能專案會有問題, 需要將java build path的JRE System Library換成Workspace default JRE 即可