Proxool 0.9.1的配置与应用

<? xml  version ="1.0"  encoding ="UTF-8" ?> 
< something-else-entirely > 
         < proxool > 
                 < alias >ds </ alias > 
                <!-- 数据源的别名--> 
                 < driver-url >jdbc:mysql://192.168.104.191:3306/testdb?useUnicode=true&characterEncoding=utf8&autoReconnect=true&zeroDateTimeBehavior=convertToNull </ driver-url > 
                <!-- url连接串--> 
                 < driver-class >com.mysql.jdbc.Driver </ driver-class > 
                <!-- 驱动类--> 
                 < driver-properties > 
                         < property  name ="user"  value ="vcom" /> 
                        <!-- 用户名--> 
                         < property  name ="password"  value ="vcom" /> 
                        <!-- 密码--> 
                 </ driver-properties > 
                 <!-- 是指在任一时刻，可以（同时）建立的最大连接数，也就是说，就是已经请求的、但还没可用的新连接数量--> 
                <simultaneous-build-throttle>10</simultaneous-build-throttle> 
                <!-- 最大连接数(默认5个),超过了这个连接数,再有请求时,就排在队列中等候,最大的等待请求数由maximum-new-connections决定 --> 
                 < maximum-connection-count >100 </ maximum-connection-count > 
                <!-- 最小连接数(默认2个)--> 
                 < minimum-connection-count >10 </ minimum-connection-count > 
                <!-- proxool自动侦察各个连接状态的时间间隔(毫秒),侦察到空闲的连接就马上回收,超时的销毁 默认30秒--> 
                 < house-keeping-sleep-time >120000 </ house-keeping-sleep-time > 
                <!-- 最少保持的空闲连接数(默认2个)--> 
                 < prototype-count >10 </ prototype-count > 
                <!-- 在使用之前测试--> 
                 < test-before-use >true </ test-before-use > 
                <!-- 用于保持连接的测试语句 --> 
                 < house-keeping-test-sql >select 1 </ house-keeping-test-sql > 
         </ proxool > 
</ something-else-entirely >

package lavasoft; 

import org.apache.commons.logging.Log; 
import org.apache.commons.logging.LogFactory; 
import org.logicalcobwebs.proxool.ProxoolException; 
import org.logicalcobwebs.proxool.configuration.JAXPConfigurator; 

import java.io.FileNotFoundException; 
import java.io.IOException; 
import java.sql.*; 
import java.util.List; 
import java.util.Properties; 

/** 
* 简单的JDBC工具类 
* 
* @author leizhimin 2009-11-23 17:35:26 
*/ 
public  class MyDB { 
         private  static  final Log log = LogFactory.getLog(MyDB. class); 
         private  static  final  boolean useDBPool =  true;     //是否使用数据库连接池 
         private  static String dburl =  null; 
         private  static String user =  null; 
         private  static String password =  null; 
         private  static Properties props =  new Properties(); 

         static { 
                init(); 
        } 

         public  static  void init() { 
                 if (useDBPool) { 
                         try { 
                                JAXPConfigurator.configure( "proxool.xml",  false); 
//                                JAXPConfigurator.configure("src/proxool.xml", false); 
                        }  catch (ProxoolException e) { 
                                e.printStackTrace(); 
                        } 
                         return; 
                } 
                 try { 
//                        props.load(new FileInputStream("/jdbc.properties")); 
                        props.load(MyDB. class.getResourceAsStream( "/jdbc.properties")); 
                }  catch (IOException e) { 
                        log.error( "#ERROR# :系统加载sysconfig.properties配置文件异常，请检查！", e); 
                } 
                dburl = props.getProperty( "jdbc.url"); 
                user = props.getProperty( "jdbc.username").trim(); 
                password = props.getProperty( "jdbc.password").trim(); 
                System.out.println(dburl); 
                System.out.println(user); 
                System.out.println(password); 
                 //注册驱动类 
                 try { 
                        Class.forName(props.getProperty( "jdbc.driver")); 
                }  catch (ClassNotFoundException e) { 
                        log.error( "#ERROR# :加载数据库驱动异常，请检查！", e); 
                         throw  new RuntimeException(e); 
                } 
        } 


         public  static  void main(String[] args)  throws FileNotFoundException { 

                 for ( int i = 0; i < 5; i++) { 
                        Connection conn = getConnection(); 
                        System.out.println(conn ==  null ?  "没连上" :  "连上了"); 
//                        System.out.println("--------"); 
//                closeConnection(conn);                         
                } 

        } 

         /** 
         * 创建一个数据库连接 
         * 
         * @return 一个数据库连接 
         */ 
         public  static Connection getConnection() { 
                Connection conn =  null; 
                 //根据连接池配置创建数据库连接 
                 if (useDBPool) { 
                         try { 
                                conn = DriverManager.getConnection( "proxool.ds"); 
                        }  catch (SQLException e) { 
                                log.error( "#ERROR# :无法从数据库连接池获取到数据库连接！"); 
                                 throw  new RuntimeException(e); 
                        } 
                         return conn; 
                } 
                 //根据JDBC配置创建数据库连接 
                 try { 
                        conn = DriverManager.getConnection(dburl, user, password); 
                }  catch (SQLException e) { 
                        log.error( "#ERROR# :创建数据库连接发生异常，请检查！", e); 
                         throw  new RuntimeException(e); 
                } 
                 return conn; 
        } 

         /** 
         * 在一个数据库连接上执行一个静态SQL语句查询 
         * 
         * @param conn            数据库连接 
         * @param staticSql 静态SQL语句字符串 
         * @return 返回查询结果集ResultSet对象 
         */ 
         public  static ResultSet executeQuery(Connection conn, String staticSql) { 
                ResultSet rs =  null; 
                 try { 
                         //创建执行SQL的对象 
                        Statement stmt = conn.createStatement(); 
                         //执行SQL，并获取返回结果 
                        rs = stmt.executeQuery(staticSql); 
                }  catch (SQLException e) { 
                        log.error( "#ERROR# :执行SQL语句出错，请检查！\n" + staticSql, e); 
                         throw  new RuntimeException(e); 
                } 
                 return rs; 
        } 

         /** 
         * 在一个数据库连接上执行一个静态SQL语句 
         * 
         * @param conn            数据库连接 
         * @param staticSql 静态SQL语句字符串 
         */ 
         public  static  void executeSQL(Connection conn, String staticSql) { 
                 try { 
                         //创建执行SQL的对象 
                        Statement stmt = conn.createStatement(); 
                         //执行SQL，并获取返回结果 
                        stmt.execute(staticSql); 
                }  catch (SQLException e) { 
                        log.error( "#ERROR# :执行SQL语句出错，请检查！\n" + staticSql, e); 
                         throw  new RuntimeException(e); 
                } 
        } 

         /** 
         * 在一个数据库连接上执行一批静态SQL语句 
         * 
         * @param conn        数据库连接 
         * @param sqlList 静态SQL语句字符串集合 
         */ 
         public  static  void executeBatchSQL(Connection conn, List<String> sqlList) { 
                 try { 
                         //创建执行SQL的对象 
                        Statement stmt = conn.createStatement(); 
                         for (String sql : sqlList) { 
                                stmt.addBatch(sql); 
                        } 
                         //执行SQL，并获取返回结果 
                        stmt.executeBatch(); 
                }  catch (SQLException e) { 
                        log.error( "#ERROR# :执行批量SQL语句出错，请检查！", e); 
                } 
        } 

         public  static  void closeConnection(Connection conn) { 
                 if (conn ==  null)  return; 
                 try { 
                         if (!conn.isClosed()) { 
                                 //关闭数据库连接 
                                conn.close(); 
                        } 
                }  catch (SQLException e) { 
                        log.error( "#ERROR# :关闭数据库连接发生异常，请检查！", e); 
                         throw  new RuntimeException(e); 
                } 
        } 
}