方法一：

package abc;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;
public class TestSort {
 /*
  请将A:1,C:8,D:1,B:3,B:1,F:1,E:5,Z:0,C:1...这样的一组数据进行按“:”的前半部分和后半部分排序
 */
 public static void main(String[] args) {
  List<Str> list = new ArrayList<Str>();
  StringBuffer b = new StringBuffer();
  String a = "A:1,C:8,D:1,B:3,B:1,F:1,E:5,Z:0,C:1";
  String[] arr = a.split(","); 
  for (int i = 0; i < arr.length; i++) {
   Str str = new Str(arr[i].split(":")[0], arr[i].split(":")[1]);
   list.add(str);
  }
  Collections.sort(list);
  Iterator iterator = list.iterator();
  while (iterator.hasNext()) {
   Str str = (Str)iterator.next();
   b.append(str.leftStr + ":" + str.rightStr + ",");
  }
  System.out.print("排序后序列是：" + b);
 }

}
class Str implements Comparable {
 String leftStr;
 String rightStr;
 public Str(String leftStr, String rightStr) {
  this.leftStr = leftStr;
  this.rightStr = rightStr;
 }
 public int compareTo(Object o) {
  Str str = (Str)o;
  int rs1 = str.leftStr.compareTo(this.leftStr);
  int rs2 = str.rightStr.compareTo(this.rightStr);
  int rs = -1;
  if (rs1 == rs2) {
   rs = rs1;
  } else if (rs1 > 0) {
   rs = 1;
  } else if (rs1 < 0) {
   rs = -1;
  } else if (rs1 == 0 && rs2 > 0) {
   rs = 1;
  } else if (rs1 == 0 && rs2 < 0) {
   rs = -1;
  }
  return rs;
 }
}


方法二：

package abc;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;
import java.util.Comparator;

public class TestSort2 {
 /*
  请将A:1,C:8,D:1,B:3,B:1,F:1,E:5,Z:0,C:1...这样的一组数据进行按“:”的前半部分和后半部分排序
 */
 public static void main(String[] args) {
  Comparator comparator = new MyComparator();
  List<Stri> list = new ArrayList<Stri>();
  StringBuffer b = new StringBuffer();
  String a = "A:1,C:8,D:1,B:3,B:1,F:1,E:5,Z:0,C:1";
  String[] arr = a.split(","); 
  for (int i = 0; i < arr.length; i++) {
   Stri str = new Stri(arr[i].split(":")[0], arr[i].split(":")[1]);
   list.add(str);
  }
  Collections.sort(list, comparator);
  Iterator iterator = list.iterator();
  while (iterator.hasNext()) {
   Stri str = (Stri)iterator.next();
   b.append(str.getLeftStr() + ":" + str.getRightStr() + ",");
  }
  System.out.print("排序后序列是：" + b);
 }
}
class Stri{
 private String leftStr;
 private String rightStr;
 public Stri(String leftStr, String rightStr) {
  this.leftStr = leftStr;
  this.rightStr = rightStr;
 }
 public String getLeftStr() {
  return leftStr;
 }
 public void setLeftStr(String leftStr) {
  this.leftStr = leftStr;
 }
 public String getRightStr() {
  return rightStr;
 }
 public void setRightStr(String rightStr) {
  this.rightStr = rightStr;
 }
}
class MyComparator implements Comparator<Stri>{
 public int compare(Stri str1, Stri str2) {
  int rs1 = str1.getLeftStr().compareTo(str2.getLeftStr());
  int rs2 = str1.getRightStr().compareTo(str2.getRightStr());
  int rs = -1;
  if (rs1 == rs2) {
   rs = rs1;
  } else if (rs1 > 0) {
   rs = 1;
  } else if (rs1 < 0) {
   rs = -1;
  } else if (rs1 == 0 && rs2 > 0) {
   rs = 1;
  } else if (rs1 == 0 && rs2 < 0) {
   rs = -1;
  }
  return rs;  
 }
}