“{“key_one“:1,“key_two“:2}“转成小驼峰命名

package com.teamnavi.digitalCampus.utils;


import java.util.Optional;
import java.util.StringJoiner;

/**
 * 驼峰转换
 */
public class HumpConversionUtils {

/*    public static void main(String[] args) {
        String s = "{\"key_one\":\"1\",\"key_two\":\"2\"}";
        String conversion = conversion(s);
        System.out.println(conversion);
    }*/

    //"{"key_one":"1","key_two":"2"}"

    public static String conversion(String underLineStr){
        String[] split = underLineStr.split(",");
        StringJoiner sj = new StringJoiner(",");
        for (String s : split) {
            StringBuilder sb = new StringBuilder();
            String[] tmp = s.split(":");
            sb.append(tabCol2GetHump(tmp[0], ""));
            sb.append(":");
            sb.append(tmp[1]);
            sj.add(sb);
        }

        return sj.toString();
    }


    public static String tabCol2GetHump(String tableColumn,String prefix) {
        Optional<String> tableColumn1 = Optional.of(tableColumn.toLowerCase());
        String s = tableColumn1.get();
        String[] s1 = s.split("_");
        StringBuilder result = new StringBuilder(getPrefix(prefix));
        for (String value : s1) {
            result.append(first2UpperCase(value));
        }
        return result.toString();
    }


    /**
     * 首字母转大写
     * @param split
     * @return
     */
    public static String first2UpperCase(String split) {

        String substring = split.substring(0, 1);
        String upper = substring.toUpperCase();

        return upper + split.substring(1);
    }


    private static String getPrefix(String prefix) {
        Optional<String> prefix1 = Optional.ofNullable(prefix);
        return prefix1.orElse("");
    }
}