怎么解决呢
官方的解决方案
During installation, there's an error about requiring org.eclipse.wst.sse.ui. How do I fix that?
The Google Plugin for Eclipse depends on other specific Eclipse components, such as WST. Your installation of Eclipse may not yet include all of them, but they can be easily installed by following these instructions. Eclipse 3.6 (Helios)
Select Help > Install New Software...
Click the link for Available Software Sites.
Ensure there is an update site named Helios. If this is not present, click Add... and enter http://download.eclipse.org/releases/helios for the Location.
Now go through the installation steps; Eclipse should download and install the plugin's dependencies.
(以上的那个页面是适合版本 3.5 (Galileo), 3.4 (Ganymede) & 3.3 (Europa)等的)
3.7版本(Indigo)的话步骤一样，只是用http://download.eclipse.org/releases/indigo