[JAVA] Case Format 변경 (UPPER_CAMEL, LOWER_HYPEN...)

google guava 사용

 

1. google CaseFormat import
   • import com.google.common.base.CaseFormat;
2. 원하는 포맷으로 변경
   String upperCamelVndr = CaseFormat.LOWER_HYPHEN.to(CaseFormat.UPPER_CAMEL, "text_test"); //TextTest
   
   
3. 포맷 종류

   //CaseFormat enum 가보면 자세하게 확인 가능
   
   LOWER_HYPHEN(CharMatcher.is('-'), "-") {
       String normalizeWord(String word) {
           return Ascii.toLowerCase(word);
       }
   
       String convert(CaseFormat format, String s) {
           if (format == LOWER_UNDERSCORE) {
               return s.replace('-', '_');
           } else {
               return format == UPPER_UNDERSCORE ? Ascii.toUpperCase(s.replace('-', '_')) : super.convert(format, s);
           }
       }
   },
   LOWER_UNDERSCORE(CharMatcher.is('_'), "_") {
       String normalizeWord(String word) {
           return Ascii.toLowerCase(word);
       }
   
       String convert(CaseFormat format, String s) {
           if (format == LOWER_HYPHEN) {
               return s.replace('_', '-');
           } else {
               return format == UPPER_UNDERSCORE ? Ascii.toUpperCase(s) : super.convert(format, s);
           }
       }
   },
   LOWER_CAMEL(CharMatcher.inRange('A', 'Z'), "") {
       String normalizeWord(String word) {
           return CaseFormat.firstCharOnlyToUpper(word);
       }
   
       String normalizeFirstWord(String word) {
           return Ascii.toLowerCase(word);
       }
   },
   UPPER_CAMEL(CharMatcher.inRange('A', 'Z'), "") {
       String normalizeWord(String word) {
           return CaseFormat.firstCharOnlyToUpper(word);
       }
   },
   UPPER_UNDERSCORE(CharMatcher.is('_'), "_") {
       String normalizeWord(String word) {
           return Ascii.toUpperCase(word);
       }
   
       String convert(CaseFormat format, String s) {
           if (format == LOWER_HYPHEN) {
               return Ascii.toLowerCase(s.replace('_', '-'));
           } else {
               return format == LOWER_UNDERSCORE ? Ascii.toLowerCase(s) : super.convert(format, s);
           }
       }
   };