1.在Eclipse中菜单help选项中选择install new software选项
2.在work with 栏中输入 Juno - http://download.eclipse.org/releases/juno，点add
3.拉到后面选择Web, XML, Java EE and OSGi Enterprise Development选项，然后选择
- Eclipse Java EE Developer Tools
- Eclipse Java Web Developer Tools
- Eclipse Web Developer Tools
- Eclipse XML Editors and Tools
4.安装等待,一直下一步导finish
5、如果还没有的话，新建一下项目