使用JDBC連接Oracle數(shù)據(jù)庫(kù)

1、import java.sql.*; public class JDBCConn private String url="" private String username="" private String password=""/*<br> 方法說(shuō)明：獲得數(shù)據(jù)連接*<br> 輸入?yún)?shù)：*<br> 返回類型： Connection 連接對(duì)象*/public Connection conn()try /加載 JDBC 驅(qū)動(dòng) Class.forName("oracle.jdbc.driver

2、.OracleDriver"); /創(chuàng)建數(shù)據(jù)庫(kù)連接Connection conDriverManager.getConnection("jdbc:oracle:thin:127.0.0.1:1521:ORCL", "test", "test"); return con;catch(ClassNotFoundException cnf) System.out.println("driver not find:"+cnf); return null;catch(SQLException sqle) Syste

3、m.out.println("can't connection db:"+sqle); return null; catch (Exception e) System.out.println("Failed to load JDBC/ODBC driver.");return null;/*<br> 方法說(shuō)明：執(zhí)行查詢 SQL 語(yǔ)句*<br> 輸入?yún)?shù)： Connection con 數(shù)據(jù)庫(kù)連接*<br> 輸入?yún)?shù)： String sql 要執(zhí)行的 SQL 語(yǔ)句*<br> 返回類型：*/public

4、 void query(Connection con, String sql)tryif(con=null)throw new Exception("database connection can't use!");if(sql=null) throw new Exception("check your parameter: 'sql'! don't input null!"); /聲明語(yǔ)句Statement stmt = con.createStatement();/執(zhí)行查詢ResultSet rs = stmt.exe

5、cuteQuery(sql);ResultSetMetaData rmeta = rs.getMetaData();/獲得數(shù)據(jù)字段個(gè)數(shù)int numColumns = rmeta.getColumnCount();while(rs.next()for(int i = 0;i< numColumns;i+)String sTemp = rs.getString(i+1);System.out.print(sTemp+" ");System.out.println("");catch(Exception e)System.out.println(&qu

6、ot;query error:"+e);*<br>方法說(shuō)明：執(zhí)行插入、更新、刪除等沒(méi)有返回結(jié)果集的SQL語(yǔ)句*<br> 輸入?yún)?shù)： Connection con 數(shù)據(jù)庫(kù)連接*<br> 輸入?yún)?shù)： String sql 要執(zhí)行的 SQL 語(yǔ)句*<br> 返回類型：*/public void execute(Connection con, String sql)tryif(con=null) return;Statement stmt = con.createStatement();stmt.executeUpdate(sql);catch

7、(Exception e)System.out.println("execute error: sql = "+sql); System.out.println(e);*<br> 方法說(shuō)明：實(shí)例演示*<br> 輸入?yún)?shù)：*<br> 返回類型：*/public void demo()tryJDBCConn oc = new JDBCConn();Connection conn = oc.conn();"insertintoStringsql=TBL_USER(id,name,password)values(seq_user.nex

8、tval,'switch','haorenpingan')"oc.execute(conn,sql);sql = "select * from TBL_USER"oc.query(conn,sql);conn.close();catch(SQLException se)System.out.println(se);catch(Exception e)System.out.println(e);/*<br> 方法說(shuō)明：主方法*<br> 輸入?yún)?shù)：*<br> 返回類型：*/public static void main(String arg)if(arg.length!=3)System.out.println("use: java JDB