用proxool配置数据库连接池步骤(自写管理类配置)

用proxool配置数据库连接池步骤(自写管理类配置)

2007-09-13 08:56

1、下载proxool 地址：http://proxool.sourceforge.net 2、解压缩proxool-0.9.0RC2.zip，拷贝lib/proxool-0.9.0RC2.jar到web-info/lib     拷贝jdbc驱动到web-info/lib 3、在WEB-INF/classes/下建立文件：Proxool.properties 文件内容如下： //网上查车数据库 jdbc-1.proxool.alias=WEBGIS jdbc-1.proxool.driver-class=oracle.jdbc.driver.OracleDriver jdbc-1.proxool.driver-url=jdbc:oracle:thin:@192.168.0.1:1521:ORCL jdbc-1.user=gis jdbc-1.password=1 jdbc-1.proxool.maximum-connection-count=20 jdbc-1.proxool.prototype-count=4 jdbc-1.proxool.house-keeping-test-sql=select sysdate from DUAL jdbc-1.proxool.verbose=true jdbc-1.proxool.statistics=10s,1m,1d jdbc-1.proxool.statistics-log-level=ERROR //标准版数据库 jdbc-2.proxool.alias=Navtech jdbc-2.proxool.driver-class=oracle.jdbc.driver.OracleDriver jdbc-2.proxool.driver-url=jdbc:oracle:thin:@192.168.0.2:1521:orcl jdbc-2.user=Nav jdbc-2.password=1 jdbc-2.proxool.maximum-connection-count=20 jdbc-2.proxool.prototype-count=4 jdbc-2.proxool.house-keeping-test-sql=select sysdate from DUAL jdbc-2.proxool.verbose=true jdbc-2.proxool.statistics=10s,1m,1d jdbc-2.proxool.statistics-log-level=ERROR //计费数据库 jdbc-3.proxool.alias=Fee jdbc-3.proxool.driver-class=oracle.jdbc.driver.OracleDriver jdbc-3.proxool.driver-url=jdbc:oracle:thin:@192.168.0.3:1521:ORCL jdbc-3.user=fee jdbc-3.password=1 jdbc-3.proxool.maximum-connection-count=20 jdbc-3.proxool.prototype-count=4 jdbc-3.proxool.house-keeping-test-sql=select sysdate from DUAL jdbc-3.proxool.verbose=true jdbc-3.proxool.statistics=10s,1m,1d jdbc-3.proxool.statistics-log-level=ERROR 4、创建连接管理类 import java.sql.*; import java.io.*; import java.util.*; import org.logicalcobwebs.proxool.configuration.PropertyConfigurator; import org.logicalcobwebs.proxool.ProxoolException; public class ConnectionManager {      static private ConnectionManager instance;      static synchronized public ConnectionManager getInstance() {          if (instance == null) {              instance = new ConnectionManager();          }          return instance;      }      private ConnectionManager() {          this.init();      }      public void freeConnection(String name, Connection con) {          try{              if(con!=null) con.close();          }catch(Exception ex){ex.printStackTrace();}      }      public Connection getConnection(String proxoolname) {          try {              return DriverManager.getConnection(proxoolname);          } catch (SQLException ex) {              return null;          }      }      public void release() {}      private void init(){          try {              InputStream is = getClass().getResourceAsStream("/Proxool.properties");              Properties properties = new Properties();              properties.load(is);              PropertyConfigurator.configure(properties);          } catch (IOException ex) {              ex.printStackTrace();          } catch (ProxoolException e1) {              e1.printStackTrace();          }      } } 5、使用示例(节选)      public Vector SqlExcute(String poolname,String sqlString) {          Vector rc = new Vector();          int colCnt = 0;          try {              connmanager = ConnectionManager.getInstance();              conn = connmanager.getConnection(poolname); //此处应为你要使用的连接池的名称,如:proxool.WEBGIS或proxool.Navtech或proxool.Fee              pstam = conn.prepareStatement(sqlString);              rs = pstam.executeQuery();              colCnt = rs.getMetaData().getColumnCount();              while (rs.next()) {                  String[] tempStr = new String[colCnt];                  for (int i = 0; i < colCnt; i++) {                      tempStr[i] = rs.getString(i + 1);                      if (tempStr[i] == null) {                          tempStr[i] = "";                      }                  }                  rc.add(tempStr);              }          } catch (Exception e) {          } finally {              try {                  rs.close();                  pstam.close();              } catch (Exception e) {                  e.printStackTrace();              }              if (conn != null) {                  try {                      connmanager.freeConnection(poolname, conn);                  } catch (Exception e) {                      e.printStackTrace();                  }              }          }          return rc;      }