java 大写字符串字符串转成小写驼峰格式

 public static PageData getPageData(PageData chargeData) {
        Iterator iterator = chargeData.entrySet().iterator();
        PageData page =new PageData();
        while (iterator.hasNext()) {
            Map.Entry<String, Object> entry = (Map.Entry<String, Object>) iterator.next();
            String str = toCamel(entry.getKey(), false);
            if (!str.equals("id")){
                page.put(str,entry.getValue());
            }
        }
        return page;
    }



    public static String toCamel(String varName,boolean isClass) {
        String str = varName.toLowerCase();
        String[] names = str.split("_");
        StringBuilder finalName = new StringBuilder();
        int i = 0;
        if(!isClass) {
            if(names.length == 1) {
                return str;
            }
            i = 1;
            finalName.append(names[0]);
        }
        for(; i < names.length; i++) {
            String temp = names[i];
            char ch = temp.charAt(0);
            ch = Character.toUpperCase(ch);
            temp = ch + temp.substring(1);

            finalName.append(temp);
        }
        return finalName.toString();
    }