java类上注释
File -> setting -> File and Code Templates
选择Includes
/**
*
*
* @author ${USER}
* @date ${DATE} ${TIME}
*/

方法上注释
File -> setting -> Live Templates
选择右侧加号 添加一个分组
选择Template Group
选择右侧加号 添加一个模板
选择Live Template

Abbreviation(缩写)
**
Template text(模板)
**
*
* @author $USER$
* @date $DATE$ $TIME$
$param$
$return$
*/
Edit Variables
param
groovyScript("def result = '';def params = \"${_1}\".replaceAll('[\\\\[|\\\\]|\\\\s]', '').split(',').toList(); for(i = 0; i < params.size(); i++) {if(params[i] != '')result+='* @param ' + params[i] + ' ' +((i < params.size() - 1) ? '\\r\\n ' : '')}; return result == '' ? null : result", methodParameters());
return
groovyScript("def returnType = \"${_1}\"; def result ='';if(returnType=='null'||returnType=='void'){return '* @return ';}else{result += '* @return ';cls = returnType.split('<');for(i = 0; i < cls.size(); i++){temp = cls[i].tokenize('.');result += temp[temp.size() - 1] + ((i < cls.size() - 1) ? '<' : '');};return result + ' ';}", methodReturnType());

Expand with(补全键)
选择Enter
Define(选择文件类型)
选择java