您需要将此更新站点添加到Eclipse。
http://download.eclipse.org/windowbuilder/WB/发布/ R201106211200 / 3.7 /

You need to add this update site to Eclipse. http://download.eclipse.org/windowbuilder/WB/release/R201106211200/3.7/

我在此页面上找到了 http://eclipse.org/windowbuilder/download.php