修改STS.ini，指定一个JRE路径：

-vm
D:\Program\Java\jdk1.7.0_79\bin\javaw.exe
-startup
plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar
--launcher.library
plugins/org.eclipse.equinox.launcher.win32.win32.x86_64_1.1.300.v20150602-1417
-product
org.springsource.sts.ide
--launcher.defaultAction
openFile
--launcher.XXMaxPermSize
256M
-vmargs
-Dosgi.requiredJavaVersion=1.7
-Xms40m
-XX:MaxPermSize=256m
-Xverify:none
-Dorg.eclipse.swt.browser.IEVersion=10001
-Xmx1200m