通过本文章学习，可以掌握java中对实体类的多个属性分别升序降序自由排序的知识点,并在最后附上代码
工具/原料
eclipse
方法/步骤
1、定义一个实体类Student,因为主要关注排序，所以实体类略显简单。
2、添加几条数据，为后续实验做准备
3、定义两个排序对象，先按chinese由低到高排序，chinese相同，则english由低到高排序。
4、按chinese由低咦筋庑檗到高排序，chinese相同，则英语由高到低排序。（即调用排序对象的reversed（）方法）
5、按chinese由高到低排序，chinese相同，则english由高到低排序。
6、全部代码：impo筠续师诈rtjava.util.ArrayList;importjava.util.Collections;import惺绅寨瞀java.util.Comparator;importjava.util.List;classStudent{ //学号 privateStringsno; //语文分数 privatefloatchinese; //英语分数 privatefloatenglish; publicStudent(Stringsno,floatchinese,floatenglish){ super(); this.sno=sno; this.chinese=chinese; this.english=english; } publicStringgetSno(){ returnsno; } publicfloatgetChinese(){ returnchinese; } publicvoidsetChinese(floatchinese){ this.chinese=chinese; } publicfloatgetEnglish(){ returnenglish; } publicvoidsetEnglish(floatenglish){ this.english=english; }}publicclassMain{ publicstaticvoidmain(String[]args){ List<Student>students=newArrayList<Student>(); students.add(newStudent("01",63.0f,75f)); students.add(newStudent("02",65.0f,72f)); students.add(newStudent("03",63.0f,82f)); students.add(newStudent("04",72.0f,72f)); students.add(newStudent("05",63.0f,65f)); Comparator<Student>compareChinese= Comparator.comparing(Student::getChinese); Comparator<Student>compareEnglish= Comparator.comparing(Student::getEnglish); Collections.sort(students, compareChinese.thenComparing(compareEnglish)); for(Students:students){ System.out.println(s.getSno()+","+s.getChinese()+"," +s.getEnglish()); } System.out.println("---------------------------------------"); Collections.sort(students, compareChinese.thenComparing(compareEnglish.reversed())); for(Students:students){ System.out.println(s.getSno()+","+s.getChinese()+"," +s.getEnglish()); } System.out.println("---------------------------------------"); Collections.sort(students, compareChinese.reversed(). thenComparing(compareEnglish.reversed())); for(Students:students){ System.out.println(s.getSno()+","+s.getChinese()+"," +s.getEnglish()); } }}