java list给对象进行排序

java 8 特性利用sort进行排序 //按照List中对象的id属性升序 list.sort(Comparator.comparing(Stu::getId)) //按照List中对象的id属性降序 list.sort(Comparator.comparing(Stu::getId).reversed()); //多条件升序 list.sort(Comparator.comparing(Stu::getId).thenComparing(Stu::getSid)); //id升序,sid降序 list.sort(Comparator.comparing(Stu::getId).reversed().thenComparing(Stu::getSid)); //key值重复的map MultiValueMap<Integer, String> timeMap = new LinkedMultiValueMap<>(); //集合升序排序 Collections.sort(student, new Comparator(){ public int compare(StudentVo p1, StudentVo p2) { return Integer.parseInt(p1.getStudentCode()) - Integer.parseInt(p2.getStudentCode()); } }); java 1.8以下进行排序 重写sort中compare方法 list.sort((x, y) -> Double.compare(x.getModuleId(), y.getModuleId()));