Interpreter 其实就是整个项目的核心，代码运行都是在里面进行执行的，首先来看下Interpreter的抽象类

以jdbc-Interpreter为例，可以参考下测试代码(这个代码里面可以直接测试jdbc的sql执行过程和数据返回过程)

参数和介绍可以参考官方文档：Apache Zeppelin 0.10.1 Documentation: Generic JDBC Interpreter for Apache Zeppelin

  @Test
  public void testSelectQueryMaxResult() throws IOException, InterpreterException {
    Properties properties = new Properties();
    properties.setProperty("common.max_count", "1");
    properties.setProperty("common.max_retry", "3");
    properties.setProperty("default.driver", "org.h2.Driver");
    properties.setProperty("default.url", getJdbcConnection());
    properties.setProperty("default.user", "");
    properties.setProperty("default.password", "");
    JDBCInterpreter t = new JDBCInterpreter(properties);
    t.open();

    String sqlQuery = "select * from test_table";

    InterpreterResult interpreterResult = t.interpret(sqlQuery, context);

    assertEquals(InterpreterResult.Code.SUCCESS, interpreterResult.code());

    List<InterpreterResultMessage> resultMessages = context.out.toInterpreterResultMessage();
    assertEquals(InterpreterResult.Type.TABLE, resultMessages.get(0).getType());
    assertEquals("ID\tNAME\na\ta_name\n", resultMessages.get(0).getData());
    assertEquals(InterpreterResult.Type.HTML, resultMessages.get(1).getType());
    assertTrue(resultMessages.get(1).getData().contains("Output is truncated"));
  }