在Codename One中，为什么我不能让FileInputStream导入或编译？ [英] In Codename One, why can I not get FileInputStream to import or compile?

问题描述

这是我的进口商品：

import com.codename1.ui.*;
import com.codename1.ui.util.*;
import com.codename1.ui.plaf.*;
import com.codename1.ui.events.*;
import com.codename1.io.*;
import com.codename1.ui.layouts.*;
import java.io.*;

我无法编译此代码：

InputStream in = new FileInputStream("users.csv");

这是错误：

C:\Users\Isaac\Documents\NetBeansProjects\CodenameOne_TESTING\src\com\fakecompany\testapp\MyApplication.java:119: error: cannot find symbol
    InputStream in = new FileInputStream("users.csv");
  symbol:   class FileInputStream
  location: class MyApplication

我认为这可能是导入问题，而且确实可以肯定，当我专门导入 java.io.FileImputStream 时，它给了我一个额外的错误：

I thought this might be a problem with the imports, and sure enough, when I specifically imported java.io.FileImputStream it gave me an additional error:

C:\Users\Isaac\Documents\NetBeansProjects\CodenameOne_TESTING\src\com\fakecompany\testapp\MyApplication.java:13: error: cannot find symbol
import java.io.FileInputStream;
  symbol:   class FileInputStream
  location: package java.io

发生了什么上？我应该以其他方式导入Codename One中的文件吗？让我知道这是否还不足以找到错误。

What is going on? Is there a different way I am supposed to import files in Codename One? Let me know if this is not enough of my code to find the error.

PS：我需要实现一个输入流，以便可以解析csv文件：

PS: I need to get an input stream implemented so I can parse the csv file:

    CSVParser parser = new CSVParser();
    String[][] data = parser.parse(in);

推荐答案

似乎代号One省略了该类-并且

It looks like Codename One has omitted that class - and others, I suspect.

从文档来看，我怀疑您要使用 com.codename1.io.FileSystemStorage 类及其 openInputStream 方法。

Judging by the documentation, I suspect you want to use the com.codename1.io.FileSystemStorage class and its openInputStream method.

您可能希望观看有关将数据存储到持久性存储中的视频。

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