今天写项目时，在使用hibernate封装的插入方法时，由于需要同时保存多个数据,导致出现identifier of an instance of
如下代码 :(由于最大最小分数不同所以需要插入两条数据)
ExamScoreDivide examScoreDivide=new ExamScoreDivide();
ExamCourse examCourse=new ExamCourse();
examCourse.setExamCourseId(examCourseId); Exam exam=new Exam();
exam.setExamId(examId); examScoreDivide.setDivideId(StringUtil.getUuid());
examScoreDivide.setMinScore(minScore1);
examScoreDivide.setMaxScore(maxScore1);
examScoreDivide.setExamCourse(examCourse);
examScoreDivide.setExam(exam);
examScoreDivide.setCreator(userInfo.getUserName());
examScoreDivide.setCreateTime(DateUtil.currentDate());
examScoreDivide.setDivideName(divideName);
gradExamScoreDivideService.save(examScoreDivide); examScoreDivide.setDivideId(StringUtil.getUuid());
examScoreDivide.setMinScore(minScore2);
examScoreDivide.setMaxScore(maxScore2);
examScoreDivide.setExamCourse(examCourse);
examScoreDivide.setExam(exam);
examScoreDivide.setCreator(userInfo.getUserName());
examScoreDivide.setCreateTime(DateUtil.currentDate());
examScoreDivide.setDivideName(divideName);
gradExamScoreDivideService.save(examScoreDivide);
但结果报该错误,后来知道了原因：
报错的原因是，在没有给对象examScoreDivide 分配初始的内存地址的时候，就进行对象生成，不管生成多少个，都是多个对象的内存指针指向一个内存地址，所以hibernate在存储时就会保存。放在内存里面每次new就等一个新的内存空间，所以不会报错。
解决后的代码：
ExamScoreDivide examScoreDivide=new ExamScoreDivide();
ExamCourse examCourse=new ExamCourse();
examCourse.setExamCourseId(examCourseId); Exam exam=new Exam();
exam.setExamId(examId); examScoreDivide.setDivideId(StringUtil.getUuid());
examScoreDivide.setMinScore(minScore1);
examScoreDivide.setMaxScore(maxScore1);
examScoreDivide.setExamCourse(examCourse);
examScoreDivide.setExam(exam);
examScoreDivide.setCreator(userInfo.getUserName());
examScoreDivide.setCreateTime(DateUtil.currentDate());
examScoreDivide.setDivideName(divideName);
gradExamScoreDivideService.save(examScoreDivide); ExamScoreDivide examScoreDivide1=new ExamScoreDivide();
ExamCourse examCourse1=new ExamCourse();
examCourse1.setExamCourseId(examCourseId); Exam exam1=new Exam();
exam1.setExamId(examId); examScoreDivide1.setDivideId(StringUtil.getUuid());
examScoreDivide1.setMinScore(minScore2);
examScoreDivide1.setMaxScore(maxScore2);
examScoreDivide1.setExamCourse(examCourse1);
examScoreDivide1.setExam(exam1);
examScoreDivide1.setDivideName(divideName);
examScoreDivide1.setCreator(userInfo.getUserName());
examScoreDivide1.setCreateTime(DateUtil.currentDate());
gradExamScoreDivideService.save(examScoreDivide1);