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@ -9,24 +9,50 @@ import java.io.InputStream;
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import java.io.OutputStream; |
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import java.util.UUID; |
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import org.apache.poi.util.DefaultTempFileCreationStrategy; |
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import org.apache.poi.util.TempFile; |
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import com.alibaba.excel.exception.ExcelAnalysisException; |
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import com.alibaba.excel.exception.ExcelGenerateException; |
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import com.alibaba.excel.exception.ExcelCommonException; |
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/** |
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* |
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* @author jipengfei |
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*/ |
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public class FileUtils { |
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public static final String POI_FILES = "poifiles"; |
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public static final String EX_CACHE = "excache"; |
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/** |
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* If a server has multiple projects in use at the same time, a directory with the same name will be created under |
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* the temporary directory, but each project is run by a different user, so there is a permission problem, so each |
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* project creates a unique UUID as a separate Temporary Files. |
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*/ |
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private static String tempFilePrefix = |
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System.getProperty(TempFile.JAVA_IO_TMPDIR) + UUID.randomUUID().toString() + File.separator; |
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/** |
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* Used to store poi temporary files. |
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*/ |
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private static String poiFilesPath = tempFilePrefix + POI_FILES + File.separator; |
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/** |
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* Used to store easy excel temporary files. |
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*/ |
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private static String cachePath = tempFilePrefix + EX_CACHE + File.separator; |
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private static final String JAVA_IO_TMPDIR = "java.io.tmpdir"; |
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private static final String POIFILES = "poifiles"; |
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private static final String CACHE = "excache"; |
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private static final int WRITE_BUFF_SIZE = 8192; |
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private FileUtils() {} |
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static { |
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// Create a temporary directory in advance
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File tempFile = new File(tempFilePrefix); |
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createDirectory(tempFile); |
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tempFile.deleteOnExit(); |
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// Initialize the cache directory
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File cacheFile = new File(cachePath); |
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createDirectory(cacheFile); |
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cacheFile.deleteOnExit(); |
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} |
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/** |
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* Reads the contents of a file into a byte array. * The file is always closed. |
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* |
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@ -106,19 +132,30 @@ public class FileUtils {
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} |
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} |
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/** |
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*/ |
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public static void createPoiFilesDirectory() { |
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createTmpDirectory(POIFILES); |
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File poiFilesPathFile = new File(poiFilesPath); |
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createDirectory(poiFilesPathFile); |
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TempFile.setTempFileCreationStrategy(new DefaultTempFileCreationStrategy(poiFilesPathFile)); |
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poiFilesPathFile.deleteOnExit(); |
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} |
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public static File createCacheTmpFile() { |
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File directory = createTmpDirectory(CACHE); |
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File cache = new File(directory.getPath(), UUID.randomUUID().toString()); |
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if (!cache.mkdir()) { |
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throw new ExcelGenerateException("Can not create temp file!"); |
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return createDirectory(new File(cachePath + UUID.randomUUID().toString())); |
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} |
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public static File createTmpFile(String fileName) { |
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return createDirectory(new File(tempFilePrefix + fileName)); |
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} |
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/** |
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* |
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* @param directory |
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*/ |
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private static File createDirectory(File directory) { |
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if (!directory.exists() && !directory.mkdirs()) { |
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throw new ExcelCommonException("Cannot create directory:" + directory.getAbsolutePath()); |
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} |
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return cache; |
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return directory; |
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} |
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/** |
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@ -144,35 +181,27 @@ public class FileUtils {
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} |
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} |
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public static File createTmpDirectory(String path) { |
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String tmpDir = System.getProperty(JAVA_IO_TMPDIR); |
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if (tmpDir == null) { |
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throw new RuntimeException( |
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"Systems temporary directory not defined - set the -D" + JAVA_IO_TMPDIR + " jvm property!"); |
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} |
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File directory = new File(tmpDir, path); |
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if (!directory.exists()) { |
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syncCreatePoiFilesDirectory(directory); |
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} |
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return directory; |
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public static String getTempFilePrefix() { |
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return tempFilePrefix; |
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} |
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public static File createTmpFile(String fileName) { |
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String tmpDir = System.getProperty(JAVA_IO_TMPDIR); |
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if (tmpDir == null) { |
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throw new RuntimeException( |
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"Systems temporary directory not defined - set the -D" + JAVA_IO_TMPDIR + " jvm property!"); |
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} |
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return new File(tmpDir, fileName); |
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public static void setTempFilePrefix(String tempFilePrefix) { |
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FileUtils.tempFilePrefix = tempFilePrefix; |
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} |
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/** |
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* |
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* @param directory |
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*/ |
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private static synchronized void syncCreatePoiFilesDirectory(File directory) { |
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if (!directory.exists()) { |
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directory.mkdirs(); |
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} |
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public static String getPoiFilesPath() { |
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return poiFilesPath; |
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} |
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public static void setPoiFilesPath(String poiFilesPath) { |
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FileUtils.poiFilesPath = poiFilesPath; |
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} |
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public static String getCachePath() { |
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return cachePath; |
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} |
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public static void setCachePath(String cachePath) { |
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FileUtils.cachePath = cachePath; |
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} |
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} |
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Jiaju Zhuang
5 years ago