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优化fileUtil

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This commit is contained in:
maxf 2018-11-27 14:45:04 +08:00
parent c85efeb4a6
commit a9f8c7aca3
1 changed files with 88 additions and 11 deletions
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99
src/main/java/com/yexuejc/base/util/FileUtil.java
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@ -11,6 +11,7 @@ import java.nio.MappedByteBuffer;
import java.nio.channels.FileChannel; import java.nio.channels.FileChannel;
import java.security.MessageDigest; import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException; import java.security.NoSuchAlgorithmException;
import java.util.logging.Logger;
import java.util.zip.CRC32; import java.util.zip.CRC32;
/** /**
@ -22,6 +23,8 @@ import java.util.zip.CRC32;
* @time 2017年11月3日 下午3:12:49 * @time 2017年11月3日 下午3:12:49
*/ */
public class FileUtil { public class FileUtil {
static Logger logger = Logger.getLogger(FileUtil.class.getName());
private FileUtil() { private FileUtil() {
} }
@ -37,15 +40,16 @@ public class FileUtil {
* @param fileName * @param fileName
* @return * @return
*/ */
public static String getFileType(String fileName) throws FileNotFoundException { public static String getFileType(String fileName) {
try { try {
if (fileName.lastIndexOf(TYPE_TAR_GZ) > 0) { if (fileName.lastIndexOf(TYPE_TAR_GZ) > 0) {
return TAR_GZ; return TAR_GZ;
} }
return fileName.substring(fileName.lastIndexOf(".") + 1); return fileName.substring(fileName.lastIndexOf(".") + 1);
} catch (Exception e) { } catch (Exception e) {
throw new FileNotFoundException("文件类型未能解析"); logger.severe("file doesn't exist or is not a file");
} }
return null;
} }
/** /**
@ -56,12 +60,13 @@ public class FileUtil {
public static void judeFileExists(File file) { public static void judeFileExists(File file) {
if (file.exists()) { if (file.exists()) {
System.out.println("file exists"); logger.severe("file exists");
} else { } else {
System.out.println("file not exists, create it ..."); logger.info("file not exists, create it ...");
try { try {
file.createNewFile(); file.createNewFile();
} catch (IOException e) { } catch (IOException e) {
logger.severe("file create fail");
e.printStackTrace(); e.printStackTrace();
} }
} }
@ -84,12 +89,12 @@ public class FileUtil {
public static boolean judeDirExists(File file) { public static boolean judeDirExists(File file) {
if (file.exists()) { if (file.exists()) {
if (file.isDirectory()) { if (file.isDirectory()) {
System.out.println("dir exists"); logger.severe("dir exists");
} else { } else {
System.out.println("the same name file exists, can not create dir"); logger.severe("the same name file exists, can not create dir");
} }
} else { } else {
System.out.println("dir not exists, create it ..."); logger.info("dir not exists, create it ...");
return file.mkdirs(); return file.mkdirs();
} }
return false; return false;
@ -121,10 +126,13 @@ public class FileUtil {
} }
return sha1; return sha1;
} catch (NoSuchAlgorithmException e) { } catch (NoSuchAlgorithmException e) {
logger.severe("system algorithm error.");
e.printStackTrace(); e.printStackTrace();
} catch (FileNotFoundException e) { } catch (FileNotFoundException e) {
logger.severe("file doesn't exist or is not a file");
e.printStackTrace(); e.printStackTrace();
} catch (IOException e) { } catch (IOException e) {
logger.severe("The operation file is an IO exception.");
e.printStackTrace(); e.printStackTrace();
} finally { } finally {
try { try {
@ -132,6 +140,7 @@ public class FileUtil {
in.close(); in.close();
} }
} catch (IOException e) { } catch (IOException e) {
logger.severe("close FileInputStream IO exception.");
} }
} }
return null; return null;
@ -154,10 +163,13 @@ public class FileUtil {
messagedigest.update(byteBuffer); messagedigest.update(byteBuffer);
return StrUtil.toHex(messagedigest.digest()); return StrUtil.toHex(messagedigest.digest());
} catch (NoSuchAlgorithmException e) { } catch (NoSuchAlgorithmException e) {
logger.severe("system algorithm error.");
e.printStackTrace(); e.printStackTrace();
} catch (FileNotFoundException e) { } catch (FileNotFoundException e) {
logger.severe("file doesn't exist or is not a file");
e.printStackTrace(); e.printStackTrace();
} catch (IOException e) { } catch (IOException e) {
logger.severe("The operation file is an IO exception.");
e.printStackTrace(); e.printStackTrace();
} }
return null; return null;
@ -189,16 +201,16 @@ public class FileUtil {
} }
return md5; return md5;
} catch (IOException e) { } catch (IOException e) {
System.out.println(e); logger.severe("The operation file is an IO exception.");
} catch (NoSuchAlgorithmException e) { } catch (NoSuchAlgorithmException e) {
System.out.println(e); logger.severe("system algorithm error.");
} finally { } finally {
try { try {
if (in != null) { if (in != null) {
in.close(); in.close();
} }
} catch (IOException e) { } catch (IOException e) {
System.out.println(e); logger.severe("close FileInputStream IO exception.");
} }
} }
return null; return null;
@ -222,10 +234,13 @@ public class FileUtil {
messagedigest.update(byteBuffer); messagedigest.update(byteBuffer);
return StrUtil.toHex(messagedigest.digest()); return StrUtil.toHex(messagedigest.digest());
} catch (NoSuchAlgorithmException e) { } catch (NoSuchAlgorithmException e) {
logger.severe("system algorithm error.");
e.printStackTrace(); e.printStackTrace();
} catch (FileNotFoundException e) { } catch (FileNotFoundException e) {
logger.severe("file doesn't exist or is not a file");
e.printStackTrace(); e.printStackTrace();
} catch (IOException e) { } catch (IOException e) {
logger.severe("The operation file is an IO exception.");
e.printStackTrace(); e.printStackTrace();
} }
return null; return null;
@ -249,9 +264,11 @@ public class FileUtil {
} }
return crc32.getValue() + ""; return crc32.getValue() + "";
} catch (FileNotFoundException e) { } catch (FileNotFoundException e) {
logger.severe("file doesn't exist or is not a file");
e.printStackTrace(); e.printStackTrace();
return null; return null;
} catch (IOException e) { } catch (IOException e) {
logger.severe("The operation file is an IO exception.");
e.printStackTrace(); e.printStackTrace();
return null; return null;
} finally { } finally {
@ -260,6 +277,7 @@ public class FileUtil {
fileInputStream.close(); fileInputStream.close();
} }
} catch (IOException e) { } catch (IOException e) {
logger.severe("close FileInputStream IO exception.");
e.printStackTrace(); e.printStackTrace();
} }
} }
@ -281,6 +299,7 @@ public class FileUtil {
fileInputStream.read(data); fileInputStream.read(data);
fileInputStream.close(); fileInputStream.close();
} catch (IOException e) { } catch (IOException e) {
logger.severe("The operation file is an IO exception.");
e.printStackTrace(); e.printStackTrace();
} }
// 对字节数组Base64编码 // 对字节数组Base64编码
@ -288,8 +307,66 @@ public class FileUtil {
return encoder.encode(data); return encoder.encode(data);
} }
/**
* 获取文件大小 ：直接返回大小
*
* @param f
* @return f.length()
*/
public static long size(File f) {
if (f.exists() && f.isFile()) {
return f.length();
} else {
logger.info("file doesn't exist or is not a file");
}
return 0;
}
/* public static void main(String[] args) { /**
* 获取文件大小 : 用流的方式获取
*
* @param f
* @return
*/
public static long size4Stream(File f) {
FileChannel fc = null;
try {
if (f.exists() && f.isFile()) {
FileInputStream fis = new FileInputStream(f);
fc = fis.getChannel();
return fc.size();
} else {
logger.info("file doesn't exist or is not a file");
}
} catch (FileNotFoundException e) {
logger.severe("file doesn't exist or is not a file");
} catch (IOException e) {
logger.severe("The operation file is an IO exception.");
} finally {
if (null != fc) {
try {
fc.close();
} catch (IOException e) {
logger.severe("close FileInputStream IO exception.");
}
}
}
return 0;
}
/*public static void main(String[] args) {
long size = FileUtil.size(new File("E:\\OS\\deepin-15.6-amd64\\DeepinCloudPrintServerInstaller_1.0.0.1.exe"));
System.out.println(size);
System.out.println(1024 * 1024 * 5);
if (size > 1024 * 1024 * 5) {
System.out.println("文件最大5M");
return;
}
long s1 = fileSize(new File("E:\\OS\\cn_windows_10_consumer_editions_version_1803_updated_march_2018_x64_dvd_12063766.iso"));
System.out.println(s1);
long s2 = fileSize4Stream(new File("E:\\OS\\cn_windows_10_consumer_editions_version_1803_updated_march_2018_x64_dvd_12063766.iso"));
System.out.println(s2);
String s1 = base64(new File("C:\\Users\\Administrator\\Desktop\\a.html")); String s1 = base64(new File("C:\\Users\\Administrator\\Desktop\\a.html"));
System.out.println(s1); System.out.println(s1);