public  Connection getConnection () throws SQLException {

		//对池进行四大参数的配置

		ConfigInfo cf=ConfigInfo.getInstance();

		try {

			dataSource.setDriverClass(cf.getDbDriver());

			dataSource.setJdbcUrl(cf.getDbUrl());

			dataSource.setUser(cf.getDbUser());

			dataSource.setPassword(cf.getDbPwd());

			

			//池配置，可以不配，有默认值

			dataSource.setAcquireIncrement(5);

			dataSource.setInitialPoolSize(20);

			dataSource.setMinPoolSize(10);

			dataSource.setMaxPoolSize(100);

			dataSource.setMaxIdleTime(60);

			//dataSource.setMaxConnectionAge(60);

			dataSource.setCheckoutTimeout(3000);

			dataSource.setAcquireRetryDelay(1000);

			dataSource.setBreakAfterAcquireFailure(false);

			dataSource.setIdleConnectionTestPeriod(60);

			dataSource.setMaxStatements(100);

			return dataSource.getConnection();

		}catch(Exception e){

			e.printStackTrace();

		}

		return null;

		

	}

这是信息：2015-11-25 09:44:54 [DEBUG] - com.mchange.v2.resourcepool.BasicResourcePool -BasicResourcePool.java(641) -acquire test -- pool is already maxed out. [managed: 50; max: 50]
    2015-11-25 09:44:54 [DEBUG] - com.mchange.v2.resourcepool.BasicResourcePool -BasicResourcePool.java(1441) -awaitAvailable(): com.mchange.v2.c3p0.impl.NewPooledConnection@bd8716
    2015-11-25 09:44:54 [DEBUG] - com.mchange.v2.resourcepool.BasicResourcePool -BasicResourcePool.java(1801) -trace com.mchange.v2.resourcepool.BasicResourcePool@16fffda [managed: 50, unused: 0, excluded: 0] (e.g. com.mchange.v2.c3p0.impl.NewPooledConnection@bd8716)
频繁操作数据库的时候就会阻塞，