public class JSONEncodeUtil {
  /**
  * 将奇数个转义字符变为偶数个
  * @param s
  * @return
  */
  public static String getDecodeJSONStr(String s){
   StringBuilder sb = new StringBuilder();
   char c;
   for (int i = 0; i < s.length(); i++) {
    c = s.charAt(i);
    switch (c) {
    case '\\':
     sb.append("\\\\");
     break;
    default:
     sb.append(c);
    }
   }
   return sb.toString();
  }
 }