JDBC

JDBC-ODBC橋連接數據庫

不足：需要在客戶端安裝ODBC驅動程序,ODBC驅動程序還需要具有客戶端的控制權限。
方法：
1.創建數據源
2.裝載驅動並與DBMS建立連接
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");     
Connection con=DriverManager.getConnectio("jdbc:odbc:jia","sa","123");
3.查詢   
Statement stmt = con.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE,ResultSet.CONCUR_READ_ONLY);
ResultSet rs = stmt.executeQuery(sql);   
4.更新   
Statement stmt = con.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE,ResultSet.CONCUR_READ_ONLY);         
if(stmt.executeUpdate(sql)<=0){return false;}   
else{return true;}      
5.讀取數據
Statement 接口提供了3種執行SQL語句的方法：
qexecuteQuery()
qexecuteUpdate()
qexecute()
6.tTransaction     
Connection con=DriverManager.getConnectio("jdbc:odbc:jia","sa","123");
con.setAutoCommit(false);//關閉自動提交模式
Statement stmt = con.createStatement();   
stmt.qexecute(sql);   
stmt.qexecute(sql);   
stmt.qexecute(sql);     
con.commit();           //提交 
con.setAutoCommit(true);//開啓自動提交模式
con.rollback();         //回滾
7.關閉連接對象
con.close();
con.isClosed();

JDBC連接數據庫

方法:
1.Oracle8/8i/9i數據庫（thin模式）
Class.forName("oracle.jdbc.driver.OracleDriver").newInstance();
String url="jdbc:oracle:thin:@localhost:1521:orcl"; //orcl爲數據庫SID
String user="test";
String password="test";
Connection conn= DriverManager.getConnection(url,user,password); 
2.DB2數據庫
Class.forName("com.ibm.db2.jdbc.app.DB2Driver ").newInstance();
String url="jdbc:db2://localhost:5000/sample"; //sample爲你的數據庫名
String user="admin";
String password="";
Connection conn= DriverManager.getConnection(url,user,password); 
3.Sql Server7.0/2000數據庫
Class.forName("com.microsoft.jdbc.sqlserver.SQLServerDriver").newInstance();
String url="jdbc:microsoft:sqlserver://localhost:1433;DatabaseName=mydb"; //mydb爲數據庫
String user="sa";
String password="";
Connection conn= DriverManager.getConnection(url,user,password); 
4.Sybase數據庫
Class.forName("com.sybase.jdbc.SybDriver").newInstance();
String url =" jdbc:sybase:Tds:localhost:5007/myDB";//myDB爲你的數據庫名
Properties sysProps = System.getProperties();
SysProps.put("user","userid");
SysProps.put("password","user_password");
Connection conn= DriverManager.getConnection(url, SysProps); 
5.Informix數據庫
Class.forName("com.informix.jdbc.IfxDriver").newInstance();
String url = "jdbc:informix-sqli://123.45.67.89:1533/myDB:INFORMIXSERVER=myserver;
user=testuser;password=testpassword"; //myDB爲數據庫名
Connection conn= DriverManager.getConnection(url); 
6.MySQL數據庫
Class.forName("org.gjt.mm.mysql.Driver").newInstance();
String url ="jdbc:mysql://localhost/myDB?user=soft&password=soft1234&useUnicode=true&characterEncoding=8859_1" //myDB爲數據庫名
Connection conn= DriverManager.getConnection(url); 
7.PostgreSQL數據庫
Class.forName("org.postgresql.Driver").newInstance();
String url ="jdbc:postgresql://localhost/myDB" //myDB爲數據庫名
String user="myuser";
String password="mypassword";
Connection conn= DriverManager.getConnection(url,user,password); 
8.access數據庫直連用ODBC的
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver") ;
String url="jdbc:odbc:Driver={MicroSoft Access Driver (*.mdb)};DBQ="+application.getRealPath("/Data/ReportDemo.mdb");
Connection conn = DriverManager.getConnection(url,"","");
Statement stmtNew=conn.createStatement() ;