导入做好的java项目出现下面的错误The project cannot be built until build pa

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导入做好的java项目出现下面的错误The project cannot be built until build path errors are resolved
我将一本J2EE书送的光盘里的一个项目拷到myeclipse,但是出现下面一些错误,
The project cannot be built until build path errors are resolved
Project 'newsRelease' is missing required library:'E:\tomcat\apache-tomcat-5.5.27\lib\annotations-api.jar'
Project 'newsRelease' is missing required library:'E:\tomcat\apache-tomcat-5.5.27\lib\el-api.jar'
Project 'newsRelease' is missing required library:'E:\tomcat\apache-tomcat-5.5.27\lib\jasper.jar'
Project 'newsRelease' is missing required library:'E:\tomcat\apache-tomcat-5.5.27\lib\jsp-api.jar'
Project 'newsRelease' is missing required library:'E:\tomcat\apache-tomcat-5.5.27\lib\servlet-api.jar'

首先说明原因:
这个工程,作者在写的时候呢,在build path中添加了他的机器里面的E:\tomcat\apache-tomcat-5.5.27\lib下的一些包,这些细节会被工程记下来.当你导入这个项目的时候呢,会自动到你的E:\tomcat\apache-tomcat-5.5.27\lib下面找这些jar包,很显然,你没有这个路径.
然后呢,解决办法：
右键工程,选择build path->configure build path,弹出的窗口里面选择libraries选项卡,你应该会看到一些标有红叉叉的jar包（可能做成了一个用户Lib的话,把那些加号都点开）,把这些删掉,然后点击add external jars,选择你的tomcat下的lib下的那几个对应的jar(annotations-api.jar,el-api.jar,jasper.jar,jsp-api.jar,servlet-api.jar)包即可,如果没有tomcat的话,下一个吧.:)

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