MongoDB operation: Update ()

2. @Override
4. public boolean update (string dbName, String CollectionName,
6. DBObject OldValue, DBObject newvalue) {
8. DB db = null;
10. Dbcollection dbcollection = null;
12. Writeresult result = null;
14. String resultstring = null;
18. if (Oldvalue.equals (NewValue)) {
20. return true;
22. }else{
24. try {
26. db = Mongoclient.getdb (dbName); Get DB Instance
28. Dbcollection = Db.getcollection (CollectionName); Gets the specified collection collection in the database
32. result = Dbcollection.update (OldValue, newvalue);
34. resultstring = Result.geterror ();
38. Return (resultstring!=null)? False:true;
40. } catch (Exception e) {
42. Todo:handle exception
44. E.printstacktrace ();
46. } finally{
48. if (null! = db) {
50. Db.requestdone (); Turn off DB
52. db = null;
54. }
56. }
60. }
64. return false;
66. }

MongoDB operation: Update ()