标签:resource 数据库链接 插入 cat print getc webapp 发送 buffer
需求:系统A 需要为 系统B数据库插入数据。
应用场景:《核心系统》中计算出有关薪资的数据,为《财务系统》发送凭证。
实现过程:
driver=oracle.jdbc.driver.OracleDriver url=********************* username=****** password=******
package cn.com.cis.acic.util; import java.io.IOException; import java.io.InputStream; import java.sql.Connection; import java.sql.DriverManager; import java.sql.ResultSet; import java.sql.SQLException; import java.sql.Statement; import java.util.Properties; /** * 定义一个工具类,负责连接数据库及其关闭数据资源 */ public class DBUtil { private static final String LOCATION="dbOracle.properties"; private static Properties props=new Properties(); static{ ClassLoader loader=DBUtil.class.getClassLoader(); InputStream is=loader.getResourceAsStream(LOCATION); try { props.load(is); } catch (IOException e) { System.out.println("填充Properties对象失败!"); e.printStackTrace(); } } private DBUtil(){} public static Connection getConnection(){ String driver=props.getProperty("driver"); String url=props.getProperty("url"); String username=props.getProperty("username"); String password=props.getProperty("password"); try { Class.forName(driver); } catch (ClassNotFoundException e) { System.out.println("数据库驱动类加载失败!"); e.printStackTrace(); } Connection conn=null; try { conn=DriverManager.getConnection(url, username, password); } catch (SQLException e) { System.out.println("连接数据库失败!"); e.printStackTrace(); } return conn; } public static void close(ResultSet rs,Statement stmt, Connection conn){ if(rs!=null){ try { rs.close(); } catch (SQLException e) { System.out.println("关闭结果集对象失败!"); e.printStackTrace(); } } if(stmt!=null){ try { stmt.close(); } catch (SQLException e) { System.out.println("关闭语句对象失败!"); e.printStackTrace(); } } if(conn!=null){ try { conn.close(); } catch (SQLException e) { System.out.println("关闭连接对象失败!"); e.printStackTrace(); } } } public static void close(ResultSet rs, Statement stmt){ close(rs,stmt,null); } public static void close(Statement stmt, Connection conn){ close(null,stmt,conn); } public static void close(Connection conn){ close(null,null,conn); } }
也可以直接读取,如:
//读取数据库链接: InputStream in = FeeManageServiceSpringImpl.class.getResourceAsStream("/accountjdbc.properties");//文件名称 InputStream in = new BufferedInputStream(new FileInputStream("D:\\tomcat-7\\webapps\\sales\\WEB-INF\\classes\\accountjdbc.proerties"));//详细地址 Properties p = new Properties(); p.load(in); String className2 = p.getProperty("DRIVER"); String url = p.getProperty("URL"); String user = p.getProperty("USER"); String password = p.getProperty("PASSWORD"); Class.forName(className2);
标签:resource 数据库链接 插入 cat print getc webapp 发送 buffer
原文地址:http://www.cnblogs.com/forever2h/p/6925217.html