fileinputstream
- 网络字节流;文件输入流;字节输入流
fileinputstream-
FileInputStream represents a file that might not be made of regular text .
FileInputStream表示一个不由常规文本构成的文件。
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When instantiating the FileInputStream , pass it a String describing the path to the Excel file to read .
在实例化FileInputStream时，向它传递一个String，用于描述要读取的Excel文件的路径。
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Because Excel files contain binary data , use FileInputStream instead of the FileReader class , which reads files containing only text characters .
由于Excel文件包含二进制数据，所以这里使用FileInputStream而不是FileReader类，后者读取只包含文本字符的文件。
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It has a constructor that consumes a FileInputStream so that the task of recovering a certificate from a file is a straightforward one .
它是一个使用FileInputStream的构造器，因此从文件中检索证书的工作很简单。