使用jdbc操作数据库

基本过程

1.获取连接 (Connection)

2.创建语句 (PrepareStatement)

3.绑定参数(setxxx)

4.执行语句(execute)

5.清理资源(close)

public static void main(String[] args) {
        ApplicationContext context = new ClassPathXmlApplicationContext(
                new String[] { "system.spring.xml" });
        DataSource dataSource = (DataSource) context.getBean("datasource");
        Connection conn = null;
        PreparedStatement ps = null;
        ResultSet rs = null;
        try {
            conn = dataSource.getConnection();
            ps = conn.prepareStatement("select id,username,fullname from t_spitter where id = ?");
            ps.setLong(1, 1);
            rs = ps.executeQuery();
            if (rs.next()) {
                System.out.println(rs.getLong(1));
                System.out.println(rs.getString("username"));
            }
        } catch (SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }finally{
            if(rs!=null){
                try {
                    rs.close();
                } catch (SQLException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            }
            if(ps!=null){
                try {
                    ps.close();
                } catch (SQLException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            }
            if(conn!=null){
                try {
                    conn.close();
                } catch (SQLException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            }
        }
    }

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转载自shaw-n-lu.iteye.com/blog/2268045