本文整理了Java中jodd.io.FileUtil.checkExists()方法的一些代码示例，展示了FileUtil.checkExists()的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。FileUtil.checkExists()方法的具体详情如下：
包路径：jodd.io.FileUtil
类名称：FileUtil
方法名：checkExists
[英]Checks if File exists. Throws IOException if not.
[中]检查文件是否存在。如果不是，则抛出IOException。
代码示例来源：origin: oblac/jodd
/**
* Checks if {@link File} exists. Throws IllegalArgumentException if not.
*
* @param file {@link File}
* @throws IllegalArgumentException if file does not exist.
*/
private static void checkReferenceExists(final File file) throws IllegalArgumentException {
try {
checkExists(file);
} catch (FileNotFoundException e) {
throw new IllegalArgumentException("Reference file not found: " + file);
}
}代码示例来源：origin: oblac/jodd
/**
* @see #unicodeInputStreamOf(InputStream, String)
* @see #checkExists(File)
* @see #checkIsFile(File)
*/
private static UnicodeInputStream unicodeInputStreamOf(final File file) throws IOException {
checkExists(file);
checkIsFile(file);
return unicodeInputStreamOf(new FileInputStream(file), null);
}代码示例来源：origin: oblac/jodd
/**
* Read file and returns byte array with contents.
*
* @param file {@link File} to read
* @param count number of bytes to read
* @return byte array from {@link File} contents.
* @throws IOException if not a {@link File} or {@link File} does not exist or file size is
* larger than {@link Integer#MAX_VALUE}.
*/
public static byte[] readBytes(final File file, final int count) throws IOException {
checkExists(file);
checkIsFile(file);
long numToRead = file.length();
if (numToRead >= Integer.MAX_VALUE) {
throw new IOException("File is larger then max array size");
}
if (count > NEGATIVE_ONE && count < numToRead) {
numToRead = count;
}
byte[] bytes = new byte[(int) numToRead];
RandomAccessFile randomAccessFile = new RandomAccessFile(file, "r");
randomAccessFile.readFully(bytes);
randomAccessFile.close();
return bytes;
}代码示例来源：origin: oblac/jodd
/**
* Checks that srcDir exists, that it is a directory and if srcDir and destDir are not equal.
*
* @param srcDir Source directory
* @param destDir Destination directory
* @throws IOException if any of the above conditions are not true.
*/
private static void checkDirCopy(final File srcDir, final File destDir) throws IOException {
checkExists(srcDir);
checkIsDirectory(srcDir);
if (equals(srcDir, destDir)) {
throw new IOException("Source '" + srcDir + "' and destination '" + destDir + "' are equal");
}
}代码示例来源：origin: oblac/jodd
/**
* Checks that file copy can occur.
*
* @param srcFile Source {@link File}
* @param destFile Destination {@link File}
* @throws IOException if srcFile does not exist or is not a file or
* srcFile and destFile are equal or cannot create ancestor directories.
*/
private static void checkFileCopy(final File srcFile, final File destFile) throws IOException {
checkExists(srcFile);
checkIsFile(srcFile);
if (equals(srcFile, destFile)) {
throw new IOException("Files '" + srcFile + "' and '" + destFile + "' are equal");
}
File destParent = destFile.getParentFile();
if (destParent != null && !destParent.exists()) {
checkCreateDirectory(destParent);
}
}代码示例来源：origin: oblac/jodd
/**
* Cleans a directory without deleting it.
*
* @param destDir destination to clean.
* @throws IOException if something went wrong.
*/
public static void cleanDir(final File destDir) throws IOException {
checkExists(destDir);
checkIsDirectory(destDir);
File[] files = destDir.listFiles();
if (files == null) {
throw new IOException("Failed to list contents of: " + destDir);
}
IOException exception = null;
for (File file : files) {
try {
if (file.isDirectory()) {
deleteDir(file);
} else {
file.delete();
}
} catch (IOException ioex) {
exception = ioex;
continue;
}
}
if (exception != null) {
throw exception;
}
}代码示例来源：origin: oblac/jodd
/**
* Reads lines from source {@link File} with specified encoding and returns lines as {@link String}s in array.
*
* @param file {@link File} to read.
* @param encoding Endoing to use.
* @return array of Strings which represents lines in the {@link File}.
* @throws IOException if {@link File} does not exist or is not a {@link File} or there is an issue reading
* the {@link File}.
*/
public static String[] readLines(final File file, final String encoding) throws IOException {
checkExists(file);
checkIsFile(file);
List<String> list = new ArrayList<>();
InputStream in = streamOf(file, encoding);
try {
BufferedReader br = new BufferedReader(StreamUtil.inputStreamReadeOf(in, encoding));
String strLine;
while ((strLine = br.readLine()) != null) {
list.add(strLine);
}
} finally {
StreamUtil.close(in);
}
return list.toArray(new String[0]);
}代码示例来源：origin: oblac/jodd
/**
* Reads file content as char array.
*
* @param file {@link File} to read.
* @param encoding Encoding to use.
* @return array of characters.
* @throws IOException if something went wrong.
*/
public static char[] readChars(final File file, final String encoding) throws IOException {
checkExists(file);
checkIsFile(file);
InputStream in = streamOf(file, encoding);
try {
return StreamUtil.readChars(in, encoding);
} finally {
StreamUtil.close(in);
}
}代码示例来源：origin: oblac/jodd
/**
* Reads UTF file content as char array.
*
* @param file {@link File} to read.
* @return array of characters.
* @throws IOException if something went wrong.
*/
public static char[] readUTFChars(final File file) throws IOException {
checkExists(file);
checkIsFile(file);
UnicodeInputStream in = unicodeInputStreamOf(file);
try {
return StreamUtil.readChars(in, detectEncoding(in));
} finally {
StreamUtil.close(in);
}
}代码示例来源：origin: oblac/jodd
/**
* Reads {@link File} content as {@link String} encoded in provided encoding.
* For UTF encoded files, detects optional BOM characters.
*
* @param file {@link File} to read.
* @param encoding Encoding to use.
* @return String representing {@link File} content.
* @throws IOException if copy to {@link InputStream} errors.
* @see #streamOf(File, String)
* @see StreamUtil#copy(InputStream, String)
*/
public static String readString(final File file, final String encoding) throws IOException {
checkExists(file);
checkIsFile(file);
InputStream in = streamOf(file, encoding);
try {
return StreamUtil.copy(in, encoding).toString();
} finally {
StreamUtil.close(in);
}
}代码示例来源：origin: org.jodd/jodd-core
/**
* Checks if {@link File} exists. Throws IllegalArgumentException if not.
*
* @param file {@link File}
* @throws IllegalArgumentException if file does not exist.
*/
private static void checkReferenceExists(final File file) throws IllegalArgumentException {
try {
checkExists(file);
} catch (FileNotFoundException e) {
throw new IllegalArgumentException("Reference file not found: " + file);
}
}代码示例来源：origin: org.jodd/jodd-core
/**
* @see #unicodeInputStreamOf(InputStream, String)
* @see #checkExists(File)
* @see #checkIsFile(File)
*/
private static UnicodeInputStream unicodeInputStreamOf(final File file) throws IOException {
checkExists(file);
checkIsFile(file);
return unicodeInputStreamOf(new FileInputStream(file), null);
}代码示例来源：origin: org.jodd/jodd-core
/**
* Read file and returns byte array with contents.
*
* @param file {@link File} to read
* @param count number of bytes to read
* @return byte array from {@link File} contents.
* @throws IOException if not a {@link File} or {@link File} does not exist or file size is
* larger than {@link Integer#MAX_VALUE}.
*/
public static byte[] readBytes(final File file, final int count) throws IOException {
checkExists(file);
checkIsFile(file);
long numToRead = file.length();
if (numToRead >= Integer.MAX_VALUE) {
throw new IOException("File is larger then max array size");
}
if (count > NEGATIVE_ONE && count < numToRead) {
numToRead = count;
}
byte[] bytes = new byte[(int) numToRead];
RandomAccessFile randomAccessFile = new RandomAccessFile(file, "r");
randomAccessFile.readFully(bytes);
randomAccessFile.close();
return bytes;
}代码示例来源：origin: org.jodd/jodd-core
/**
* Checks that srcDir exists, that it is a directory and if srcDir and destDir are not equal.
*
* @param srcDir Source directory
* @param destDir Destination directory
* @throws IOException if any of the above conditions are not true.
*/
private static void checkDirCopy(final File srcDir, final File destDir) throws IOException {
checkExists(srcDir);
checkIsDirectory(srcDir);
if (equals(srcDir, destDir)) {
throw new IOException("Source '" + srcDir + "' and destination '" + destDir + "' are equal");
}
}代码示例来源：origin: org.jodd/jodd-core
/**
* Cleans a directory without deleting it.
*
* @param destDir destination to clean.
* @throws IOException if something went wrong.
*/
public static void cleanDir(final File destDir) throws IOException {
checkExists(destDir);
checkIsDirectory(destDir);
File[] files = destDir.listFiles();
if (files == null) {
throw new IOException("Failed to list contents of: " + destDir);
}
IOException exception = null;
for (File file : files) {
try {
if (file.isDirectory()) {
deleteDir(file);
} else {
file.delete();
}
} catch (IOException ioex) {
exception = ioex;
continue;
}
}
if (exception != null) {
throw exception;
}
}代码示例来源：origin: org.jodd/jodd-core
/**
* Checks that file copy can occur.
*
* @param srcFile Source {@link File}
* @param destFile Destination {@link File}
* @throws IOException if srcFile does not exist or is not a file or
* srcFile and destFile are equal or cannot create ancestor directories.
*/
private static void checkFileCopy(final File srcFile, final File destFile) throws IOException {
checkExists(srcFile);
checkIsFile(srcFile);
if (equals(srcFile, destFile)) {
throw new IOException("Files '" + srcFile + "' and '" + destFile + "' are equal");
}
File destParent = destFile.getParentFile();
if (destParent != null && !destParent.exists()) {
checkCreateDirectory(destParent);
}
}代码示例来源：origin: org.jodd/jodd-core
/**
* Reads lines from source {@link File} with specified encoding and returns lines as {@link String}s in array.
*
* @param file {@link File} to read.
* @param encoding Endoing to use.
* @return array of Strings which represents lines in the {@link File}.
* @throws IOException if {@link File} does not exist or is not a {@link File} or there is an issue reading
* the {@link File}.
*/
public static String[] readLines(final File file, final String encoding) throws IOException {
checkExists(file);
checkIsFile(file);
List<String> list = new ArrayList<>();
InputStream in = streamOf(file, encoding);
try {
BufferedReader br = new BufferedReader(StreamUtil.inputStreamReadeOf(in, encoding));
String strLine;
while ((strLine = br.readLine()) != null) {
list.add(strLine);
}
} finally {
StreamUtil.close(in);
}
return list.toArray(new String[0]);
}代码示例来源：origin: org.jodd/jodd-core
/**
* Reads file content as char array.
*
* @param file {@link File} to read.
* @param encoding Encoding to use.
* @return array of characters.
* @throws IOException if something went wrong.
*/
public static char[] readChars(final File file, final String encoding) throws IOException {
checkExists(file);
checkIsFile(file);
InputStream in = streamOf(file, encoding);
try {
return StreamUtil.readChars(in, encoding);
} finally {
StreamUtil.close(in);
}
}代码示例来源：origin: org.jodd/jodd-core
/**
* Reads UTF file content as char array.
*
* @param file {@link File} to read.
* @return array of characters.
* @throws IOException if something went wrong.
*/
public static char[] readUTFChars(final File file) throws IOException {
checkExists(file);
checkIsFile(file);
UnicodeInputStream in = unicodeInputStreamOf(file);
try {
return StreamUtil.readChars(in, detectEncoding(in));
} finally {
StreamUtil.close(in);
}
}代码示例来源：origin: org.jodd/jodd-core
/**
* Reads {@link File} content as {@link String} encoded in provided encoding.
* For UTF encoded files, detects optional BOM characters.
*
* @param file {@link File} to read.
* @param encoding Encoding to use.
* @return String representing {@link File} content.
* @throws IOException if copy to {@link InputStream} errors.
* @see #streamOf(File, String)
* @see StreamUtil#copy(InputStream, String)
*/
public static String readString(final File file, final String encoding) throws IOException {
checkExists(file);
checkIsFile(file);
InputStream in = streamOf(file, encoding);
try {
return StreamUtil.copy(in, encoding).toString();
} finally {
StreamUtil.close(in);
}
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