对不同类型的数据处理

DatabaseEntry来绑定基本的JAVA数据类型，主要有String、Character、Boolean、Byte、Short、Integer、Long、Float、Double.

还是要在你的D盘中创建bdb文件夹。

例子:

1. package test;
2. import java.io.File;
3. import java.io.UnsupportedEncodingException;
4. import com.sleepycat.bind.EntityBinding;
5. import com.sleepycat.bind.EntryBinding;
6. import com.sleepycat.bind.tuple.LongBinding;
7. import com.sleepycat.bind.tuple.TupleBinding;
8. import com.sleepycat.je.Database;
9. import com.sleepycat.je.DatabaseConfig;
10. import com.sleepycat.je.DatabaseEntry;
11. import com.sleepycat.je.DatabaseException;
12. import com.sleepycat.je.Environment;
13. import com.sleepycat.je.EnvironmentConfig;
14. import com.sleepycat.je.EnvironmentLockedException;
15. import com.sleepycat.je.LockMode;
16. import com.sleepycat.je.OperationStatus;
17. /**
18. * 对java中的内置对象的存储
19. * @author Administrator
20. *
21. */
22. public class MyTest {
23. public static void main(String[] args) {
24. Environment env=null;
25. Database db = null;
26. EnvironmentConfig envconfig=new EnvironmentConfig();
27. envconfig.setAllowCreate(true);
28. try {
29. env=new Environment(new File("D://bdb"),envconfig);
30. DatabaseConfig dbconfig=new DatabaseConfig();
31. dbconfig.setAllowCreate(true);
32. db=env.openDatabase(null, "dbac.db", dbconfig);
33. String key="mykey";
34. DatabaseEntry thekey=new DatabaseEntry();
35. thekey.setData(key.getBytes("utf-8"));
36. Long value=new Long(123456);
37. DatabaseEntry thevalue=new DatabaseEntry();
38. EntryBinding myBinging=TupleBinding.getPrimitiveBinding(Long.class);
39. myBinging.objectToEntry(value, thevalue);
40. //LongBinding myLongBinging=(LongBinding)TupleBinding.getPrimitiveBinding(Long.class);
41. //myLongBinging.objectToEntry(value, thevalue);
42. db.put(null, thekey, thevalue);
43. DatabaseEntry valueEntry = new DatabaseEntry();
44. OperationStatus status= db.get(null, thekey, valueEntry, LockMode.DEFAULT);
45. if(status==OperationStatus.SUCCESS){
46. //Long number=myLongBinging.entryToObject(valueEntry);
47. Long number=(Long) myBinging.entryToObject(valueEntry);
48. System.out.println(env.getDatabaseNames());
49. System.out.println(number);
50. }
51. } catch (EnvironmentLockedException e) {
52. e.printStackTrace();
53. } catch (Exception e) {
54. e.printStackTrace();
55. } finally{
56. if(db!=null){
57. try {
58. db.close();
59. } catch (DatabaseException e) {
60. e.printStackTrace();
61. }
62. }
63. if(env!=null){
64. try {
65. env.cleanLog();
66. env.close();
67. } catch (DatabaseException e) {
68. e.printStackTrace();
69. }
70. }
71. }
72. }
73. }