Java中如何对多个字段进行sort操作呢？

实现思路:
    使用Collections.sort即可进行多个字段的sort操作

Collections.sort(reportlist, new Comparator<Report>() {

@Override
public int compare(final Report record1, final Report record2) {
      return (record1.getReportKey() + record1.getStudentNumber() + record1.getSchool())                      
        .compareTo(record2.getReportKey() + record2.getStudentNumber() + record2.getSchool());
      }

});