oracle jdbc 连接字符串

Connection conn = null;
conn = DriverManager.getConnection("jdbc:oracle:thin:@152.146.231.183:1521:crm", "crm", "p");
		    java.sql.Statement stmt = conn.createStatement();
		    java.sql.ResultSet rs = stmt.executeQuery(sql.toString());
		    rs.close();
		    stmt.close();
		    conn.close();