java application在myeclipse中的.project配置檔案為

<?xml version="1.0" encoding="UTF-8"?>
<projectDescription>
	<name>ProjectName</name>
	<comment></comment>
	<projects>
	</projects>
	<buildSpec>
		<buildCommand>
			<name>org.eclipse.jdt.core.javabuilder</name>
			<arguments>
			</arguments>
		</buildCommand>
	</buildSpec>
	<natures>
		<nature>org.eclipse.jdt.core.javanature</nature>
	</natures>
</projectDescription>

 將上面的檔案開啟後，替換為如下程式碼

<?xml version="1.0" encoding="UTF-8"?>
<projectDescription>
	<name>ProjectName</name>
	<comment></comment>
	<projects>
	</projects>
	<buildSpec>
		<buildCommand>
			<name>com.genuitec.eclipse.j2eedt.core.WebClasspathBuilder</name>
			<arguments>
			</arguments>
		</buildCommand>
		<buildCommand>
			<name>org.eclipse.jdt.core.javabuilder</name>
			<arguments>
			</arguments>
		</buildCommand>
		<buildCommand>
			<name>com.genuitec.eclipse.j2eedt.core.J2EEProjectValidator</name>
			<arguments>
			</arguments>
		</buildCommand>
		<buildCommand>
			<name>com.genuitec.eclipse.j2eedt.core.DeploymentDescriptorValidator
			</name>
			<arguments>
			</arguments>
		</buildCommand>
		<buildCommand>
			<name>org.eclipse.wst.validation.validationbuilder</name>
			<arguments>
			</arguments>
		</buildCommand>
	</buildSpec>
	<natures>
		<nature>com.genuitec.eclipse.j2eedt.core.webnature</nature>
		<nature>org.eclipse.jdt.core.javanature</nature>
	</natures>
</projectDescription>

 其中ProjectName為你的專案名稱

再將.classpath檔案中的

<classpathentry kind="src" path="src"/> 

<classpathentry kind="output" path="WebRoot/WEB-INF/classes"/> 

兩個path改為你專案中對應的路徑，其中src對應的path就是java專案中的src,

outpath 一般改為WebRoot/WEB-INF/classes，修改後的檔案如下

<?xml version="1.0" encoding="UTF-8"?>
<classpath>
	<classpathentry kind="src" path="src"/>
	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-1.6"/>
	<classpathentry kind="con" path="melibrary.com.genuitec.eclipse.j2eedt.core.MYECLIPSE_JAVAEE_6_CONTAINER"/>
	<classpathentry kind="output" path="WebRoot/WEB-INF/classes"/>
</classpath>

儲存兩個檔案後，在myEclipse中重新整理專案即可,這時，原來的java專案圖示

 就變成了web專案圖示