winneryong

梦魇

test code highlight

hello
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private static void showAllDatas(EntityManagerFactory emf) {
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EntityManager em = emf.createEntityManager();
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em.getTransaction().begin();
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List < Teacher > allTeachers = em.createQuery(
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" select teacher from Teacher teacher " ).getResultList();
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for ( int i = 0 ; i < allTeachers.size(); i ++ ) {
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Teacher teacher = allTeachers.get(i);
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System.out.println(teacher);
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for ( int j = 0 ; j < teacher.getStudents().size(); j ++ ) {
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System.out.println( " " + teacher.getStudents().get(j));
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}
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}
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em.getTransaction().commit();
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em.close();
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}

posted on 2006-07-26 10:52 爱生活爱JAVA 阅读(73) 评论(0) 编辑收藏所属分类: Core Java