DBUtil

import java.io.IOException;
import java.io.InputStream;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.Properties;
import javax.sql.DataSource;
import org.apache.commons.dbcp.BasicDataSourceFactory;

/**
 * 
 * Database Connection Tool
 * 
 */
public class DBUtil {
	
	private static DataSource ds = null;
	static {
		ClassLoader classLoader = DBUtil.class.getClassLoader();
		InputStream is = classLoader.getResourceAsStream("jdbc_mysql.properties");
		Properties p = new Properties();
		try {
			p.load(is);
			ds = BasicDataSourceFactory.createDataSource(p);
		} catch (IOException e) {
			e.printStackTrace();
		} catch (Exception e) {
			e.printStackTrace();
		}
	}

	/**
	 * 获得一个数据库连接对象
	 * 
	 * @returnConnection对象
	 */
	public static Connection getConnection() {
		Connection conn = null;
		try {
			conn = ds.getConnection();
		} catch (SQLException e) {
			e.printStackTrace();
		} catch (Exception e) {
			e.printStackTrace();
		}
		return conn;
	}

	/**
	 * 关闭结果集对象
	 */
	public static void close(ResultSet rs) {
		if (rs != null) {
			try {
				rs.close();
			} catch (SQLException e) {
				e.printStackTrace();
			}
		}
	}

	/**
	 * 关闭语句对象
	 */
	public static void close(Statement stmt) {
		if (stmt != null) {
			try {
				stmt.close();
			} catch (SQLException e) {
				e.printStackTrace();
			}
		}
	}

	/**
	 * 关闭连接对象
	 */
	public static void close(Connection conn) {
		if (conn != null) {
			try {
				conn.close();
			} catch (SQLException e) {
				e.printStackTrace();
			}
		}
	}

	/**
	 * 关闭所有
	 * 
	 * @param rs
	 * @param stmt
	 * @param conn
	 */
	public static void close(ResultSet rs, Statement stmt, Connection conn) {
		close(rs);
		close(stmt);
		close(conn);
	}
}

# jdbc_mysql.properties
driverClassName=com.mysql.jdbc.Driver
url=jdbc\:mysql\://127.0.0.1\:3306/cfs?useUnicode\=true&characterEncoding\=utf8
username=someuser
password=changeme
initialSize=30
maxActive=90
maxIdle=30
maxWait=10000
removeAbandoned=true
removeAbandonedTimeout=300