List 排序

package collection.list;

import java.text.Collator;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;

import testforstring.stringsomemonth;

public class listCustomSort {
    
    public static void main(String[] args) {
        //一、数字、英文排序（保证list集合只有数字或者英文一种情况）
        List li = new ArrayList();
        li.add("1");
        li.add("email");
        li.add("2");
        li.add("comparator");
        li.add("admin");
        
//        li.add(3);
//        li.add(2);
//        li.add(1);
        Collections.sort(li);
        System.out.println("升序："+li);
        Collections.reverse(li);  
        System.out.println("降序："+li);
        System.out.println("==================================================");
        
        //二、中文排序：（中文：阿拉伯最前、其次拼音、再次汉字）
        List<String> li2 = new ArrayList<String>();
        li2.add("梁朝伟");
        li2.add("周星驰");
        li2.add("黎明");
        li2.add("张学友");
        li2.add("Eason");
        li2.add("5566");
        Comparator<Object> Chinacompa = Collator.getInstance(java.util.Locale.CHINA);
        Collections.sort(li2, Chinacompa);
        System.out.println(li2);
        System.out.println("==================================================");
        
        //三、实体类排序
        List<Applicant> userlist = new ArrayList<Applicant>();
        userlist.add(new Applicant("Eason(e)",33,"本科",8.5));
        userlist.add(new Applicant("周星驰(z)",47,"大专",11.8));
        userlist.add(new Applicant("黎姿(l)",28,"本科",8.5));
        userlist.add(new Applicant("吴孟达(w)",28,"大专以下",9.7));
        Comparator<Applicant> cmp = new ComparatorUser();
        Collections.sort(userlist, cmp);
        for (Applicant user : userlist) {
            System.out.println(user.getName());
        }
        
        //mian foot
    }
}

class ComparatorUser implements Comparator<Applicant> {
    @Override
    public int compare(Applicant u1, Applicant u2) {
        Integer u1xl = xlComparator(u1.getXl());
        Integer u2xl = xlComparator(u2.getXl());
        //1、先按学历排序
        int flag = u1xl.compareTo(u2xl);
        //2、学历相同比较经验
        if (flag==0) {
            flag=u1.getGzjy().compareTo(u2.getGzjy());
            //3、经验相同比较年龄
            if (flag==0) {
                flag=u1.getAge().compareTo(u2.getAge());
                if (flag==0) {
                    return u1.getName().compareTo(u2.getName());
                } else {
                    return flag;
                }
            } else {
                return flag;
            }
        } else {
            return flag;
        }
    }
    
    public Integer xlComparator(String xl){
        int flag = 0;
        if ("本科".equals(xl)) {
            flag = 0;
        } else if("大专".equals(xl)){
            flag = 1;
        } else if("大专以下".equals(xl)){
            flag = 2;
        }
        return flag;
    }
}

class Applicant {
    private String name;
    private Integer age;
    private String xl;
    private Double gzjy;
    
    public Applicant() {
        super();
    }
    public Applicant(String name, Integer age,String xl,Double gzjy) {
        super();
        this.name = name;
        this.age = age;
        this.xl = xl;
        this.gzjy = gzjy;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public Integer getAge() {
        return age;
    }
    public void setAge(Integer age) {
        this.age = age;
    }
    public String getXl() {
        return xl;
    }
    public void setXl(String xl) {
        this.xl = xl;
    }
    public Double getGzjy() {
        return gzjy;
    }
    public void setGzjy(Double gzjy) {
        this.gzjy = gzjy;
    }
}