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
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