以mac版 eclipse为例
java代码自动提示：Preferences->java->Editor->Content Assist
输入：QWERTYUIOPASDFGHJKLZXCVBNM[]{};’:”,./<>?\|`~!@#$%^&*()_+-=
xml代码自动提示：Preferences->XML->XML Files->Editor->Content Assist
输入：QWERTYUIOPASDFGHJKLZXCVBNM[]{};’:”,./<>?\|`~!@#$%^&*()_+-=
