程序代码：

public static  Connection getconnection2() throws Exception{
        Properties properties=new Properties();
        InputStream in=
                JDBCtools.class.getClass().getClassLoader().getResourceAsStream("jdbc.properties");//这里出错！！！
    properties.load(in);
    String user=properties.getProperty("user");
    String password=properties.getProperty("password");
    String jdbcUrl=properties.getProperty("jdbcUrl");
    String driver=properties.getProperty("driver");
    Class.forName(driver);
    return DriverManager.getConnection(jdbcUrl,user,password)

程序代码：

public void  testResultSet() {
        Connection conn=null;
        Statement statement=null;
        ResultSet rs=null;
        try {
            conn=JDBCtools.getconnection2();//这里出错
            statement=conn.createStatement();
            String sql="SELECTid,name,email,brith"
                    + "FROM customers WHERE id=2";
            rs=statement.executeQuery(sql);
            if(rs.next()){
                int id=rs.getInt(1);
                String name=rs.getString("name");
                String email=rs.getString(3);
                Date brith=rs.getDate(4);
                System.out.println(id);
                System.out.println(name);
                System.out.println(email);
                System.out.println(brith);
            }
                    
        } catch (Exception e) {
            // TODO 自动生成的 catch 块
            e.printStackTrace();
        }finally{
            JDBCtools.release(rs, statement, conn);
        }
        
        
    }