字符转换

1.转换驼峰命名

/**
     * 转换驼峰命名 如：External English name->externalEnglishName
     * @param param
     * @return
     */
    private String conversionHumpNaming(String param) {
        String[] split = param.split("\\s+");

        if(split.length==1){
            return param;
        }

        StringBuilder sb = new StringBuilder();
        for (int i = 0; i < split.length; i++) {
            char[] ch = split[i].toCharArray();
            if(i==0){
                if (ch[0] >= 'A' && ch[0] <= 'Z') {
                    ch[0] = (char) (ch[0] + 32);
                }
                String strT = new String(ch);
                sb.append(strT);
            }else {
                if (ch[0] >= 'a' && ch[0] <= 'z') {
                    ch[0] = (char) (ch[0] - 32);
                }
                String strT = new String(ch);
                sb.append(strT);
            }
        }
        return sb.toString().trim();
    }