DBCP使用例子

Apache Tomcat7.02 集成了DBCP连接池，JAR文件为tomcat-dbcp.jar，以下是一个使用例子：
1package myBean; 2 3import java.sql.*; 4import javax.sql.DataSource; 5 6//DBCP原版包为org.apache.commons.dbcp.BasicDataSource; 7import org.apache.tomcat.dbcp.dbcp.BasicDataSource; 8 9public class test { 10 public test() { 11 12 } 13 14 public void haha() { 15 DataSource dataSource = setupDataSource("jdbc:sqlserver://LOCALHOST:1433;DatabaseName=BBS"); 16 Connection conn = null; 17 Statement stmt = null; 18 ResultSet rset = null; 19 try { 20 System.out.println("Creating connection."); 21 conn = dataSource.getConnection(); 22 System.out.println("Creating statement."); 23 stmt = conn.createStatement(); 24 System.out.println("Executing statement."); 25 rset = stmt.executeQuery("select * from tblUserInfo"); 26 System.out.println("Results:"); 27 int numcols = rset.getMetaData().getColumnCount(); 28 while (rset.next()) { 29 for (int i = 1; i <= numcols; i++) { 30 System.out.print("/t" + rset.getString(i)); 31 } 32 System.out.println(""); 33 } 34 } catch (SQLException e) { 35 e.printStackTrace(); 36 } finally { 37 try { 38 if (rset != null) 39 rset.close(); 40 } catch (Exception e) { 41 } 42 try { 43 if (stmt != null) 44 stmt.close(); 45 } catch (Exception e) { 46 } 47 try { 48 if (conn != null) 49 conn.close(); 50 } catch (Exception e) { 51 } 52 } 53 } 54 55 public static DataSource setupDataSource(String connectURI) { 56 BasicDataSource ds = new BasicDataSource(); 57 ds.setDriverClassName("com.microsoft.sqlserver.jdbc.SQLServerDriver"); 58 ds.setUsername("sa"); 59 ds.setPassword("******"); 60 ds.setUrl(connectURI); 61 return ds; 62 } 63 64 public static void printDataSourceStats(DataSource ds) { 65 BasicDataSource bds = (BasicDataSource) ds; 66 System.out.println("NumActive: " + bds.getNumActive()); 67 System.out.println("NumIdle: " + bds.getNumIdle()); 68 } 69 70 public static void shutdownDataSource(DataSource ds) throws SQLException { 71 BasicDataSource bds = (BasicDataSource) ds; 72 bds.close(); 73 } 74 75}