java 如何将 InputStream 输入 CSVReader？
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How do I feed an InputStream into a CSVReader?
提问by user3011731
I want to convert InputStreaminto CSVReader. When I am using the code below
我想转换InputStream成CSVReader. 当我使用下面的代码时
CSVReader reader = new CSVReader(new FileReader(ADDRESS_FILE));
it is working fine, but, if I fetch the file from class path, then this code is not working.
它工作正常，但是，如果我从类路径中获取文件，则此代码不起作用。
How do I convert a InputStreamto CSVReader?
如何将 a 转换InputStream为CSVReader？
This is not working cause InputStreamis not a string type:
这不起作用，原因InputStream不是字符串类型：
InputStream input = ImportCsv.class.getResourceAsStream("/dataUpload/staff.csv");
CSVReader reader = new CSVReader(new FileReader(input));
回答by Joop Eggen
CSVReader reader = new CSVReader(new InputStreamReader(input, "UTF-8"));
The bridge between binary bytes / InputStream, and unicode text (Reader/String) is the InputStreamReader. Specify the encoding of the bytes / InputStream if the file is not local.
二进制字节/InputStream 和Unicode 文本（Reader/String）之间的桥梁是InputStreamReader。如果文件不是本地文件，请指定字节/InputStream 的编码。
回答by Niru
Use
利用
CSVReader reader = new CSVReader(new InputStreamReader(input));
Edit to answer the comment
编辑以回答评论
The problem is because you don't have any constructor for FileReader as you want. See the FileReaderAPI for details. But since you will have to convert the byte stream to character stream so you will have to use InputStreamReader. For better performance you can wrap it with a BufferedReaderalso
问题是因为你没有任何你想要的 FileReader 构造函数。有关详细信息，请参阅FileReaderAPI。但是由于您必须将字节流转换为字符流，因此您必须使用InputStreamReader. 为了获得更好的性能，你可以用它包装BufferedReader也
