Poi Unable to read entire header 0 bytes read expected 512 bytesJava 使用POI 读取 excel文件，错误：
Poi Unable to read entire header; 0 bytes read; expected 512 bytes
Java 使用POI 读取 excel文件，错误：
Unable to read entire header; 0 bytes read; expected 512 bytes
原因可能：
FileInputStream 使用了两次，第二次就会报这个错
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