不用spring框架,只使用jdbcTemplate + proxool

jdbcTemplate + proxool

只使用jdbcTemplate, 連接池用proxool.

1.下載地址
  proxool:
    http://proxool.sourceforge.net/
 
 

2.導入的包
  asm-3.3.1.jar
  cglib-2.2.2.jar
  commons-logging-1.1.1.jar
  log4j-1.2.16.jar
  mysql-connector-java-5.1.8-bin.jar
  org.springframework.beans-3.1.1.RELEASE.jar
  org.springframework.core-3.1.1.RELEASE.jar
  org.springframework.jdbc-3.1.1.RELEASE.jar
  org.springframework.transaction-3.1.1.RELEASE.jar
  proxool-0.9.1.jar
  proxool-cglib.jar

3.配置文件 /WEB-INF/proxool.xml
    <?xml version="1.0" encoding="UTF-8"?>
    <something-else-entirely>
         <proxool>
         <alias>dbname</alias>
         <driver-url>jdbc:mysql://118.186.210.242:447/wucaiju?user=root&amp;password=root&amp;useUnicode=true&amp;characterEncoding=utf-8</driver-url>
         <driver-class>com.mysql.jdbc.Driver</driver-class>
         <driver-properties>
             <property name="user" value="root" />
             <property name="password" value="root" />
         </driver-properties>  
         <maximum-connection-count>100</maximum-connection-count>  
         <minimum-connection-count>10</minimum-connection-count>   
         <house-keeping-sleep-time>30000</house-keeping-sleep-time>
         <maximum-new-connections>10</maximum-new-connections>
         <prototype-count>5</prototype-count>
         </proxool>
    </something-else-entirely>  

4.web.xml
 
<servlet>   
        <servlet-name>ServletConfigurator</servlet-name>   
        <servlet-class>
            org.logicalcobwebs.proxool.configuration.ServletConfigurator
        </servlet-class>   
        <init-param>   
            <param-name>xmlFile</param-name>   
            <param-value>WEB-INF/proxool.xml</param-value>   
        </init-param>   
        <load-on-startup>1</load-on-startup>   
    </servlet>   
    <servlet>   
        <servlet-name>datasource_dbname</servlet-name>   
        <servlet-class>org.logicalcobwebs.proxool.admin.servlet.AdminServlet</servlet-class>   
    </servlet>   
    <servlet-mapping>   
        <servlet-name>datasource_dbname</servlet-name>   
        <url-pattern>/datasource_dbname</url-pattern>   
    </servlet-mapping>   
    <!-- 配置受保護域，只有Tomcat管理員才能察看連接池的信息 -->   
    <security-constraint>   
        <web-resource-collection>   
            <web-resource-name> proxool </web-resource-name>   
            <url-pattern>/datasource_dbname</url-pattern>   
        </web-resource-collection>   
        <auth-constraint>   
            <role-name>manager</role-name>   
        </auth-constraint>   
    </security-constraint>   
    <login-config>   
        <auth-method>BASIC</auth-method>   
        <realm-name>proxool manager Application</realm-name>   
    </login-config>   
    <security-role>   
        <description>   
            The role that is required to log in to the Manager  
            Application  
        </description>   
        <role-name> manager </role-name>   
    </security-role>


5.測試類
 public class TestDao {

    public void test()throws Exception{
        Context context = new InitialContext();  
        //DataSource ds = (DataSource)context.lookup("java:/comp/env/jdbc/mysql");  
        //DataSource ds = (DataSource)context.lookup("proxool.dbname");
        DataSource ds = new ProxoolDataSource("dbname") ;   //此處是alias的名稱,而不是"proxool.別名"
        
        JdbcTemplate jdbcTemplate = new JdbcTemplate(ds);
        jdbcTemplate.afterPropertiesSet();
        System.out.println(jdbcTemplate);
        
        String sql = "select * from t_pic";
        List list = jdbcTemplate.queryForList(sql);
        
        for(int i=0; i<list.size(); i++){
            Map map = (Map)list.get(i);
            System.out.println(map.get("createTime"));
        }
    }
}


6.直接jdbc用proxool
 
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;

import org.logicalcobwebs.proxool.ProxoolException;
import org.logicalcobwebs.proxool.ProxoolFacade;
import org.logicalcobwebs.proxool.admin.SnapshotIF;
import org.logicalcobwebs.proxool.configuration.JAXPConfigurator;

public class PoolManager{
    
    private   static   int  activeCount =  0 ;          
              
              
    public  PoolManager(){          
                  
    }             
    /**        
     * 獲取連接        
     * getConnection        
     * @param name        
     * @return        
     */          
    public  Connection getConnection() {          
        try {          
            Class.forName("org.logicalcobwebs.proxool.ProxoolDriver" ); //proxool驅動類           
            Connection conn = DriverManager.getConnection("proxool.dbname" );    // 注意,此處用的是proxool + 別名   
           //此處的datasource1是在proxool.xml中配置的連接池別名，當然根據需要可以用datasource2          
            showSnapshotInfo();          
                      
            return  conn;          
        }catch (Exception ex){          
            ex.printStackTrace();          
        }          
        return   null ;          
    }          
    /**        
     * 此方法可以得到連接池的信息        
     * showSnapshotInfo        
     */          
    private   void  showSnapshotInfo(){          
        try {          
            SnapshotIF snapshot = ProxoolFacade.getSnapshot("dbname" ,  true );          
            int  curActiveCount=snapshot.getActiveConnectionCount(); //獲得活動連接數           
            int  availableCount=snapshot.getAvailableConnectionCount(); //獲得可得到的連接數           
            int  maxCount=snapshot.getMaximumConnectionCount() ; //獲得總連接數           
            if (curActiveCount!=activeCount) //當活動連接數變化時輸出的信息           
            {          
             System.out.println("活動連接數:" +curActiveCount+ "(active)  可得到的連接數:" +availableCount+ "(available)  總連接數:" +maxCount+ "(max)" );                       
             activeCount=curActiveCount;          
            }          
        }catch (ProxoolException e){          
            e.printStackTrace();          
        }          
    }          
    /**        
     * 獲取連接        
     * getConnection        
     * @param name        
     * @return        
     */          
    public  Connection getConnection(String name){          
        return  getConnection();          
    }          
    /**        
     * 釋放連接        
     * freeConnection        
     * @param conn        
     */          
    public   void  freeConnection(Connection conn){          
        if (conn!= null ){          
            try  {          
                conn.close();          
            } catch  (SQLException e) {                        
                e.printStackTrace();          
            }          
        }          
    }          
    /**        
     * 釋放連接        
     * freeConnection        
     * @param name        
     * @param con        
     */          
    public   void  freeConnection (String name,Connection con){          
        freeConnection(con);          
    }          
              
    public   void  getQuery() {                  
        try  {          
            Connection conn = getConnection();          
            if (conn !=  null ){          
                Statement statement = conn.createStatement();          
                ResultSet rs = statement.executeQuery("select * from t_pic" );          
                int  c = rs.getMetaData().getColumnCount();          
                while (rs.next()){                             
                    System.out.println();          
                    for ( int  i= 1 ;i<=c;i++){          
                        System.out.print(rs.getObject(i));          
                    }          
                }          
                rs.close();          
            }          
            freeConnection(conn);          
        } catch  (SQLException e) {                    
            e.printStackTrace();          
        }          
         
    }       
    
    public static void main(String args[]){
        PoolManager pm = new PoolManager();
        pm.getQuery();
    }
         
}