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package cn.wisenergy.chnmuseum.party.common.util;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.net.FileNameMap;
import java.net.URLConnection;
public class FileUtil {
private static final Logger logger = LoggerFactory.getLogger(FileUtil.class);
/**
* Get the Mime Type from a File
* <p>
* 参考：http://www.rgagnon.com/javadetails/java-0487.html，http://dada89007.
* iteye.com/blog/1392606
* </p>
*
* @param fileName
* @return
*/
public static String getMimeType(String fileName) {
FileNameMap fileNameMap = URLConnection.getFileNameMap();
String type = fileNameMap.getContentTypeFor(fileName);
logger.debug("type:" + type);
return type;
}
/**
* 获得指定文件的byte数组
*/
public static byte[] getBytes(String filePath) {
byte[] buffer = null;
File file = new File(filePath);
buffer = getBytes(file);
return buffer;
}
/**
* 获得指定文件的byte数组
*/
public static byte[] getBytes(File file) {
byte[] buffer = null;
try {
FileInputStream fis = new FileInputStream(file);
buffer = new byte[fis.available()];
long length = fis.read(buffer);
fis.close();
logger.debug("length:" + length);
} catch (FileNotFoundException e) {
logger.error("FileNotFoundException异常", e);
} catch (IOException e) {
logger.error("IOException异常", e);
}
return buffer;
}
}