1.新建一个代码片段文件
选择File -> Preferences -> User Snippets
选择代码片段类型，此处为New Global Snippets file
选中后，确认新建一个文件
2.设置fileheader的代码片段(json格式)

"File Header Comments": {
    "prefix": "fileheader",
    "body": [
        "/**",
        " * ${1:Undocumented}",
        " * @author: username",
        " * @email: example@qq.com",
        " * @date: ${CURRENT_YEAR}/${CURRENT_MONTH}/${CURRENT_DATE} ${CURRENT_HOUR}:${CURRENT_MINUTE}",
        " */"
    ],
    "description": "File Header Comments"
}