转String

public String getNpdhStrBySqdh(String sqdh){

    List<String> npdhList =dispatcherFeign.getNpdhBySqdId(sqdh);

StringBuffer npbhStr =new StringBuffer();

for (String npdh: npdhList) {

        npbhStr.append(npdh +",");

}

    return npbhStr.toString();

}