方法1:采用String的split,验证代码如下:
  import java.util.Arrays;
  public class TestSplit {
   public static void main(String[] args) {
    String orignString = new String("5,8,7,4,3,9,1");
    String[] testString = orignString.split(",");
    int[] test = { 0, 0, 0, 0, 0, 0, 0 };
    //String to int
    for (int i = 0; i  testString.length; i++) {
     test[i] = Integer.parseInt(testString[i]);
    }
    //sort
    Arrays.sort(test);
    //asc sort
    for (int j = 0; j  test.length; j++) {
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