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