Three methods for connecting Java JDBC Thin Driver to Oracle

Source: Internet
Author: User

Three methods for connecting Java JDBC Thin Driver to Oracle
1. JDBC connection Oracle explain JDBC application connection Oracle problems, the error is as follows: ORA-12505, TNS: listener does not currently know of SID given in connect descriptor TheConnection descriptor used by the client was. I configured static registration at the DB level, and GLOBAL_DBNAME and SID_NAME are different. The previous configuration is the same, so I did not find this problem. (SID_DESC = (GLOBAL_DBNAME = dave) (ORACLE_HOME = D: \ app \ Administrator \ product \ 11.2.0 \ dbhome_1) (SID_NAME = NEWCCS) Oracle Listener Dynamic Registration and static registration After logging on to the Internet, I found that the formats of JDBC Thin Driver has three formats: Format 1: Oracle JDBC Thin using a ServiceName: jdbc: oracle: thin: @ //

Listener.oraSID_LIST_LISTENER = (SID_LIST =   (SID_DESC =     (GLOBAL_DBNAME = dave)         (ORACLE_HOME =D:\app\Administrator\product\11.2.0\dbhome_1)     (SID_NAME = NEWCCS)    )  )Tnsnames.oraDVD = (DESCRIPTION =   (ADDRESS_LIST =     (ADDRESS = (PROTOCOL = TCP)(HOST = = 1521))    )   (CONNECT_DATA =     (SERVICE_NAME = dave)    )  )


2.2 Test 1, using SID: newccs
Import java. SQL. *; public class jdbc {String dbUrl = "jdbc: oracle: thin: @ 1521: newccs"; String theUser = "dave"; String thePw = "dave "; connection c = null; Statement conn; ResultSet rs = null; public jdbc () {try {Class. forName ("oracle. jdbc. driver. oracleDriver "). newInstance (); c = DriverManager. getConnection (dbUrl, theUser, thePw); conn = c. createStatement ();} catch (Exception e) {e. printStackTrace () ;}} public boolean executeUpdate (String SQL) {try {conn.exe cuteUpdate (SQL); return true;} catch (SQLException e) {e. printStackTrace (); return false ;}} public ResultSet executeQuery (String SQL) {rs = null; try {rs = conn.exe cuteQuery (SQL);} catch (SQLException e) {e. printStackTrace ();} return rs;} public void close () {try {conn. close (); c. close ();} catch (Exception e) {e. printStackTrace () ;}} public static void main (String [] args) {ResultSet rs; jdbc conn = new jdbc (); rs = conn.exe cuteQuery ("select * from dave where rownum <5"); try {while (rs. next () {System. out. println (rs. getString ("username") + "--" + rs. getString ("user_id") ;}} catch (Exception e) {e. printStackTrace () ;}}--- output normal: MGMT_VIEW--97 ANQING--94 DVD--93 SYSMAN--95


2.3 use service_name: dave to change the dbUrl in section 2.2 to the following: String dbUrl = "jdbc: oracle: thin: @ // 1521/dave"; output result: MGMT_VIEW--97 ANQING--94 DVD--93 if the SYSMAN--95 encounters the following error in 11g: Test to run Java class, error: java. SQL. SQLException: The Network Adapter cocould not establish the connection can try to change The corresponding jdbc connection driver. the official website describes JDBC Thin Driver 11g Causes "Java. SQL. sqlexception: Io Exception: The Network Adapter cocould NotEstab Lish The Connection "While Connecting to Oracle Database 11g [ID947653.1] Change the JDBC connection driver class inyour application server from: oracle. jdbc. driver. oracleDriver to oracle. jdbc. oracleDriver 2.4 uses TNS name: dvd String dbUrl = "jdbc: oracle: thin: @ dvd"; the following error is returned: java. SQL. SQLException: Unknown host specified. This problem occurs because the JVM does not have system property OF tns_admin. There are two solutions: Method 1: Add the following parameter when starting the VM: tns_admin = D: \ app \ Administrator \ product \ 11.2.0 \ dbhome_1 \ NETWORK \ ADMIN Method 2: Add System in java code. setProperty (" tns_admin "," D :\\ app \ Administrator \ product \ 11.2.0 \ dbhome_1 \ NETWORK \ ADMIN "); after adding, you can use tnsnama in JDBC normally.
import java.sql.*;     public class jdbc {      String dbUrl = "jdbc:oracle:thin:@dvd";  //  String dbUrl = "jdbc:oracle:thin:@//";  //  String dbUrl = "jdbc:oracle:thin:@";      String theUser = "dave";      String thePw = "dave";      Connection c = null;      Statement conn;      ResultSet rs = null;         public jdbc() {         try {         System.setProperty("","D:\\app\\Administrator\\product\\11.2.0\\dbhome_1\\NETWORK\\ADMIN");             Class.forName("oracle.jdbc.driver.OracleDriver").newInstance();  //         Class.forName("oracle.jdbc.OracleDriver").newInstance();             c = DriverManager.getConnection(dbUrl, theUser, thePw);             conn = c.createStatement();         } catch (Exception e) {             e.printStackTrace();         }      }         public boolean executeUpdate(String sql) {         try {             conn.executeUpdate(sql);             return true;         } catch (SQLException e) {             e.printStackTrace();             return false;         }      }         public ResultSet executeQuery(String sql) {         rs = null;         try {             rs = conn.executeQuery(sql);         } catch (SQLException e) {             e.printStackTrace();         }         return rs;      }         public void close() {         try {             conn.close();             c.close();         } catch (Exception e) {             e.printStackTrace();         }      }         public static void main(String[] args) {         ResultSet rs;         jdbc conn = new jdbc();         rs = conn.executeQuery("select * from dave where rownum<5");         try {             while ( {                System.out.println(rs.getString("username")+"--"+rs.getString("user_id"));             }         } catch (Exception e) {             e.printStackTrace();         }      }  }     


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