二级缓存的试用.doc

二级缓存的试用1.加入ehcase.xml文件；2.在配置文件中加入如下代码：true org.hibernate.cache.EhCacheProviderzhJava代码1. packagecom.bjsxt.hibernate;2. 3. importorg.hibernate.CacheMode;4. importorg.hibernate.Session;5. importorg.hibernate.SessionFactory;6. 7. importjunit.framework.TestCase;8. 9. /*10. *测试二级缓存11. *authorAdministrator12. *13. */14. publicclassCacheLevel2TestextendsTestCase15. 16. /*17. *开启二级缓存，开启两个session，分别调用load方法18. */19. publicvoidtestCache1()20. Sessionsession=null;21. try22. session=HibernateUtils.getSession();23. session.beginTransaction();24. 25. Studentstudent=(Student)session.load(Student.class,1);26. System.out.println(=+student.getName();27. session.getTransaction().commit();28. catch(Exceptione)29. e.printStackTrace();30. session.getTransaction().rollback();31. finally32. HibernateUtils.closeSession(session);33. 34. 35. try36. session=HibernateUtils.getSession();37. session.beginTransaction();38. 39. /不会发出sql，因为开启了二级缓存，session是共享二级缓存的40. Studentstudent=(Student)session.load(Student.class,1);41. System.out.println(=+student.getName();42. session.getTransaction().commit();43. catch(Exceptione)44. e.printStackTrace();45. session.getTransaction().rollback();46. finally47. HibernateUtils.closeSession(session);48. 49. 50. 51. 52. /*53. *开启二级缓存，开启两个session，分别调用get方法54. */55. publicvoidtestCache2()56. Sessionsession=null;57. try58. session=HibernateUtils.getSession();59. session.beginTransaction();60. 61. Studentstudent=(Student)session.get(Student.class,1);62. System.out.println(=+student.getName();63. session.getTransaction().commit();64. catch(Exceptione)65. e.printStackTrace();66. session.getTransaction().rollback();67. finally68. HibernateUtils.closeSession(session);69. 70. 71. try72. session=HibernateUtils.getSession();73. session.beginTransaction();74. 75. /不会发出sql，因为开启了二级缓存，session是共享二级缓存的76. Studentstudent=(Student)session.get(Student.class,1);77. System.out.println(=+student.getName();78. session.getTransaction().commit();79. catch(Exceptione)80. e.printStackTrace();81. session.getTransaction().rollback();82. finally83. HibernateUtils.closeSession(session);84. 85. 86. 87. 88. /*89. *开启二级缓存，先调用load，再使用SessionFactory清除二级缓存90. */91. publicvoidtestCache3()92. Sessionsession=null;93. try94. session=HibernateUtils.getSession();95. session.beginTransaction();96. 97. Studentstudent=(Student)session.load(Student.class,1);98. System.out.println(=+student.getName();99. session.getTransaction().commit();100. catch(Exceptione)101. e.printStackTrace();102. session.getTransaction().rollback();103. finally104. HibernateUtils.closeSession(session);105. 106. 107. /管理二级缓存108. SessionFactoryfactory=HibernateUtils.getFactory();109. /factory.evict(Student.class);110. factory.evict(Student.class,1);111. 112. try113. session=HibernateUtils.getSession();114. session.beginTransaction();115. 116. /会发出sql，因为二级缓存中的数据被清除了117. Studentstudent=(Student)session.load(Student.class,1);118. System.out.println(=+student.getName();119. session.getTransaction().commit();120. catch(Exceptione)121. e.printStackTrace();122. session.getTransaction().rollback();123. finally124. HibernateUtils.closeSession(session);125. 126. 127. 128. 129. /*130. *一级缓存和二级缓存的交互131. */132. publicvoidtestCache4()133. Sessionsession=null;134. try135. session=HibernateUtils.getSession();136. session.beginTransaction();137. 138. /仅向二级缓存读数据，而不向二级缓存写数据139. session.setCacheMode(CacheMode.GET);140. 141. Studentstudent=(Student)session.load(Student.class,1);142. System.out.println(=+student.getName();143. session.getTransaction().commit();144. catch(Exceptione)145. e.printStackTrace();146. session.getTransaction().rollback();147. finally148. HibernateUtils.closeSession(session);149. 150. 151. try152. session=HibernateUtils.getSession();153. session.beginTransaction();154. 155. Studentstudent=(Student)session.load(Student.class,1);156. System.out.println(=+student.getName();157. session.getTransaction().commit();158. catch(Exceptione)159. e.printStackTrace();160. session.getTransaction().rollback();161. finally162. HibernateUtils.closeSession(session);163. 164. 165. try166. session=HibernateUtils.getSession();167. session.beginTransaction();168. 169. /指向二级缓存放数据，而不从二级缓存读数据170. session.setCacheMode(CacheMode.PUT);171. 172. /会发出sql，因为CacheMode设置为PUT，它不会读取二级缓存中的数据173. Studentstudent=(Student)session.load(Student.class,1);174. System.out.println(stud