·project facet java version 1.6 is not supported 是因为jdk不符合当前，改变则直接，project->project Facts->java
·遇到这Several ports (8080, 8009) required by Tomcat v6.0 Server at localhost are already in use. The server may already be running in another process, or a system process may be using the port. To start
this server you will need to stop the other process or change the port number(s).那就是tomcat已经打开了，得关掉后再在eclipse中使用。
·把myeclipse给卸载掉了，换成了eclipse，到位了，全部的软件都给安装完毕且配置完毕了。
·eclipse的配置过程与myeclipse之间无差别，但是其中也出现一些如上述问题一样的小插曲，不过还好没出现么大问题，但是有的以前写的java却运行不出来。