数组转String

pk = [ABC,DEF];

//根据逗号截取数组

String[] str = pk.split(",");

//根据数组的长度循环遍历

for (int w = 0; w < str.length; w++) {

System.out.print(str[w])；

}

for (int w = 0; w < str.length; w++) {

               //格式强转换

              list = Collections.singletonList(SaloutbillService.findByNumber(str[w]));

}