public class Student {
 private int age;
 
 private String name;
 
 private String weight;
 public String getWeight() {
  return weight;
 }
 public void setWeight(String weight) {
  this.weight = weight;
 }
 public int getAge() {
  return age;
 }
 public void setAge(int age) {
  this.age = age;
 }
 public String getName() {
  return name;
 }
 public void setName(String name) {
  this.name = name;
 }
}

 /**
 * 按照List中的某个Int类型的属性进行排序
 * @param list
 */
@SuppressWarnings("unchecked")
public static void sortIntMethod(List list){
  Collections.sort(list, new Comparator(){
  @Override
  public int compare(Object o1, Object o2) {
   Student stu1=(Student)o1;
   Student stu2=(Student)o2;
   if(stu1.getAge()>stu2.getAge()){
    return 1;
   }else if(stu1.getAge()==stu2.getAge()){
    return 0;
   }else{
    return -1;
   }
  }    
  });
  System.out.println("/////////////排序之后///////////////");
  for(int i=0;i<list.size();i++){
   Student st=(Student)list.get(i);
   System.out.println("st.age="+st.getAge()+",st.name="+st.getName());
  }
}

 /**
 * 按照List中的某个String类型的属性进行排序
 * @param list
 */
@SuppressWarnings("unchecked")
public static void sortStringMethod(List list){
  Collections.sort(list, new Comparator(){
  @Override
  public int compare(Object o1, Object o2) {
   Student stu1=(Student)o1;
   Student stu2=(Student)o2;
   return stu1.getName().compareTo(stu2.getName());
  }    
  });
  System.out.println("/////////////排序之后///////////////");
  for(int i=0;i<list.size();i++){
   Student st=(Student)list.get(i);
   System.out.println("st.age="+st.getAge()+",st.name="+st.getName());
  }
}

/**
  * 按照List中的某个String类型的属性进行排序
  * @param list
  */
 @SuppressWarnings("unchecked")
 public static void sortByRuleBasedCollator(List list){
  Collections.sort(list, new Comparator(){
   @Override
   public int compare(Object o1, Object o2) {
     return ((java.text.RuleBasedCollator)java.text.Collator.getInstance(java.util.Locale.CHINA)).compare(((Student)o1).getName(), ((Student)o2).getName());
   }  
  });
  System.out.println("/////////////排序之后///////////////");
   for(int i=0;i<list.size();i++){
    Student st=(Student)list.get(i);
    System.out.println("st.age="+st.getAge()+",st.name="+st.getName());
   }
 }

    @SuppressWarnings("unchecked")
public static void main(String[] args) {

 ArrayList list=new ArrayList();
 Student t1=new Student();
 t1.setAge(35);
 t1.setName("wanglei");
 list.add(t1);
 
 Student t2=new Student();
 t2.setAge(4);
 t2.setName("lisi");
 list.add(t2);
 
 Student t3=new Student();
 t3.setAge(56);
 t3.setName("zhonghua");
 list.add(t3);
 
 Student t4=new Student();
 t4.setAge(39);
 t4.setName("waanglei");
 list.add(t4);
 System.out.println("/////////////排序之前///////////////");
 for(int i=0;i<list.size();i++){
   Student st=(Student)list.get(i);
   System.out.println("st.age="+st.getAge()+",st.name="+st.getName());
  }
        //按照List中的某个Int类型的属性进行排序
 sortIntMethod(list);
 //按照List中的某个String类型的属性进行排序
 sortStringMethod(list); 
}