java ArrayList集合中的某个对象属性进行排序的实现代码

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);	
}