1 public class HumpUtils { 2     private static final Pattern linePattern = Pattern.compile("_(\\w)"); 3     private static final Pattern humpPattern = Pattern.compile("[A-Z]"); 4  5     /**下划线转驼峰*/ 6     public static String lineHump(String str){ 7         str = str.toLowerCase(); 8         Matcher matcher = linePattern.matcher(str); 9         StringBuffer sb = new StringBuffer();10         while(matcher.find()){11             matcher.appendReplacement(sb, matcher.group(1).toUpperCase());12         }13         matcher.appendTail(sb);14         return sb.toString();15     }16     /**驼峰转下划线*/17     public static String hump2Line(String str){18         Matcher matcher = humpPattern.matcher(str);19         StringBuffer sb = new StringBuffer();20         while(matcher.find()){21             matcher.appendReplacement(sb, "_"+matcher.group(0).toLowerCase());22         }23         matcher.appendTail(sb);24         return sb.toString();25     }26     public static void main(String[] args) {27         String lineToHump = lineHump("45hhf_parent_no_leader");28         System.out.println(lineToHump);29         System.out.println(hump2Line(lineToHump));30     }31 }