java集合类多条件排序

package sort;

import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;

/**
 * 排序规则，按照年龄排序，若年龄相同，按照工资排序，若工资相同，按照身高排序
 * @author Administrator
 *
 */
public class TestObjectSort {
	public static void main(String[] args) {
		List<Student> students=new ArrayList<Student>();
		students.add(new Student("zhangsan",21,3000,180));
		students.add(new Student("zhangsan",27,4000,180));
		students.add(new Student("zhangsan",15,1000,180));
		students.add(new Student("zhangsan",21,5000,180));
		students.add(new Student("zhangsan",45,4000,180));
		students.add(new Student("zhangsan",21,5000,174));
		students.add(new Student("zhangsan",20,4000,180));
		students.add(new Student("zhangsan",33,4000,180));
		students.add(new Student("zhangsan",45,4000,180));
		students.add(new Student("zhangsan",76,4000,180));
		students.add(new Student("zhangsan",99,4000,180));
		students.add(new Student("zhangsan",21,5000,160));
		
		Collections.sort(students, new Comparator<Student>(){
				      public int compare(Student a1, Student a2) {
				 	            int x = a1.getAge() - a2.getAge();
				                int y = a1.getSalary() - a2.getSalary();
				 	            int z = a1.getHeight() - a2.getHeight();
				          if(x==0){
				                 if(y==0){
				                        return z;
				                  }
				                return y;
				            }
				            return x;
				        }
				         
					    });
		
		for(Student s:students){
			System.out.println(s.getName()+"\t"+s.getAge()+"\t"+s.getSalary()+"\t"+s.getHeight());
		}
	}
}



class Student{
	
	Student(String name,int age,int salary,int height){
		
		this.name=name;
		this.age=age;
		this.salary=salary;
		this.height=height;
		
	}
	private String name;
	
	private int  age;
	
	private int salary;
	
	private int height;

	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}

	public int getAge() {
		return age;
	}

	public void setAge(int age) {
		this.age = age;
	}

	public int getSalary() {
		return salary;
	}

	public void setSalary(int salary) {
		this.salary = salary;
	}

	public int getHeight() {
		return height;
	}

	public void setHeight(int height) {
		this.height = height;
	}
	
	
	
	
}
	
	
	
	
	

 打印结果

zhangsan	15	1000	180
zhangsan	20	4000	180
zhangsan	21	3000	180
zhangsan	21	5000	160
zhangsan	21	5000	174
zhangsan	21	5000	180
zhangsan	27	4000	180
zhangsan	33	4000	180
zhangsan	45	4000	180
zhangsan	45	4000	180
zhangsan	76	4000	180
zhangsan	99	4000	180

 

评论

2 楼 java门徒CZP 2012-11-06  

数据量大时的速度？？

1 楼 showtimes52007 2012-11-06  

也就相当于分组,然后排序嘛.