Myeclipse的动态web项目转为eclipse的动态web项目

在Myeclipse中重新定义了web服务了目录的文件夹，而这些，都定义在.classpath文件下

删除Myeclipse的javaee容器标签，如下，这一句不改会报找不到的错误

Description	Resource	Path	Location	Type
Classpath entry melibrary.com.genuitec.eclipse.j2eedt.core.MYECLIPSE_JAVAEE_5_CONTAINER will not be exported or published. Runtime ClassNotFoundExceptions may result.  	orderdinner		P/orderdinner	Classpath Dependency Validator Message

删除下面这一句

<classpathentry kind="con" path="melibrary.com.genuitec.eclipse.j2eedt.core.MYECLIPSE_JAVAEE_5_CONTAINER"/>

然后在eclipse中导入这个工程，可能会出现以下错误

Description	Resource	Path	Location	Type
The superclass "javax.servlet.http.HttpServlet" was not found on the Java Build Path	addfood.jsp	/orderdinner/WebRoot/admin	line 1	JSP Problem

servlet相关的类找不到

点击项目名--右键-->Build Path-->Configure Build Path

选择Library,点击Add Library，选择Server Runtime点击Next，选择你配置的服务器，比如说Tomcat点击Finish,点击OK

然后配置以下运行时要用到的服务器

最后映射关系可能会出现问题点击Properties-->Project Facets

勾选Dynamic Web Module，右边的运行时注意选上tomcat

点击下边的Futher configuration available

Content directory改成WebRoot点击Apply点击OK

配置成功！

对比以下Myeclipse和eclipse的.classpath文件吧

myeclipse的文件

<?xml version="1.0" encoding="UTF-8"?>
<classpath>
<classpathentry kind="src" path="src"/>
<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER"/>
<classpathentry kind="con" path="melibrary.com.genuitec.eclipse.j2eedt.core.MYECLIPSE_JAVAEE_5_CONTAINER"/>
<classpathentry kind="lib" path="WebRoot/WEB-INF/lib/commons-fileupload-1.2.1.jar"/>
<classpathentry kind="lib" path="WebRoot/WEB-INF/lib/commons-io-1.4.jar"/>
<classpathentry kind="lib" path="WebRoot/WEB-INF/lib/jstl.jar"/>
<classpathentry kind="lib" path="WebRoot/WEB-INF/lib/mysql-connector-java-5.0.8-bin.jar"/>
<classpathentry kind="lib" path="WebRoot/WEB-INF/lib/standard.jar"/>
<classpathentry kind="output" path="WebRoot/WEB-INF/classes"/>
</classpath>

eclipse的文件

<?xml version="1.0" encoding="UTF-8"?>
<classpath>
<classpathentry kind="src" path="src"/>
<classpathentry kind="lib" path="WebRoot/WEB-INF/lib/commons-fileupload-1.2.1.jar"/>
<classpathentry kind="lib" path="WebRoot/WEB-INF/lib/commons-io-1.4.jar"/>
<classpathentry kind="lib" path="WebRoot/WEB-INF/lib/jstl.jar"/>
<classpathentry kind="lib" path="WebRoot/WEB-INF/lib/mysql-connector-java-5.0.8-bin.jar"/>
<classpathentry kind="lib" path="WebRoot/WEB-INF/lib/standard.jar"/>
<classpathentry kind="con" path="org.eclipse.jst.server.core.container/org.eclipse.jst.server.tomcat.runtimeTarget/Apache Tomcat v7.0">
<attributes>
<attribute name="owner.project.facets" value="jst.web;#system#"/>
</attributes>
</classpathentry>
<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/jre7">
<attributes>
<attribute name="owner.project.facets" value="java"/>
</attributes>
</classpathentry>
<classpathentry kind="con" path="org.eclipse.jst.j2ee.internal.web.container"/>
<classpathentry kind="con" path="org.eclipse.jst.j2ee.internal.module.container"/>
<classpathentry kind="output" path="WebRoot/WEB-INF/classes"/>
</classpath>

此外，还有另一种改法，也是比较常见的，在eclipse下新建动态Web 项目，然后复制src下的文件到src目录，复制WebRoot目录下的文件WebContent目录下

对应的.classpath文件为

<?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-1.7">
<attributes>
<attribute name="owner.project.facets" value="java"/>
</attributes>
</classpathentry>
<classpathentry kind="con" path="org.eclipse.jst.j2ee.internal.web.container"/>
<classpathentry kind="con" path="org.eclipse.jst.j2ee.internal.module.container"/>
<classpathentry kind="con" path="org.eclipse.jst.server.core.container/org.eclipse.jst.server.tomcat.runtimeTarget/Apache Tomcat v7.0"/>
<classpathentry kind="output" path="build/classes"/>
</classpath>