Java Code Examples for org.apache.commons.lang3.SystemUtils#getJavaIoTmpDir()

/**
 * 获得自定义的空心字体 STCAIYUN.TTF，该字体已经制成为 jar，需要加入项目的 classpath
 * 经过测试，该空心字体作为 pdf 的水印，不会遮挡 pdf 原文，支持中文
 * 需要注意的是，空心字体不能太小，否则会看不清楚
 *
 * @return
 * @throws IOException
 */
private static PdfFont getPdfFont() throws IOException {

    //空心字体
    String fontName = "/STCAIYUN.TTF";
    String fontPath =
            SystemUtils.getJavaIoTmpDir()
                    + File.separator + MyConstants.JarTempDir + File.separator
                    + fontName;

    //如果已经拷贝过，就不用再拷贝了
    if (!Files.exists(Paths.get(fontPath))) {
        MyFileUtils.copyResourceFileFromJarLibToTmpDir(fontName);
    }
    return PdfFontFactory.createFont(fontPath, PdfEncodings.IDENTITY_H);
}
 

public void log() throws FileNotFoundException, IOException {

	File tempDir = SystemUtils.getJavaIoTmpDir();
	String tempKawanSoftDirStr = tempDir.toString();
	if (! tempKawanSoftDirStr.endsWith(File.separator)) {
	    tempKawanSoftDirStr+=File.separator;
	}
	
	tempKawanSoftDirStr += ".kawansoft";
	File tempKawanSoftDir = new File(tempKawanSoftDirStr);
	if (!tempKawanSoftDir.exists()) {
	    tempKawanSoftDir.mkdirs();
	}
	
	File file = new File(tempKawanSoftDirStr +  File.separator + "aceql_exceptions.log");
	
	// Security delete if more than 200 MB
	if (file.length() > MAX_LENGTH) {
	    file.delete();
	}
	
	try(OutputStream out = new BufferedOutputStream(new FileOutputStream(file, true))) {
	    ServerSqlManager.writeLine(out, getNowFormatted() + " " + ExceptionUtils.getStackTrace(throwable));	
	}
	
    }
 

/**
 * 获取 pdfdecrypt.exe 文件路径
 *
 * @return
 * @throws IOException
 */
private static String getPdfPdfdecryptExec() {

    //命令行模式，只需要两个文件即可
    String exec1 = "/pdfdecrypt.exe";
    String exec2 = "/license.dat";

    String tempPath =
            SystemUtils.getJavaIoTmpDir()
                    + File.separator + MyConstants.JarTempDir + File.separator;

    String exec1Path = tempPath + exec1;
    String exec2Path = tempPath + exec2;

    //如果已经拷贝过，就不用再拷贝了
    if (!Files.exists(Paths.get(exec1Path)))
        MyFileUtils.copyResourceFileFromJarLibToTmpDir(exec1);

    if (!Files.exists(Paths.get(exec2Path)))
        MyFileUtils.copyResourceFileFromJarLibToTmpDir(exec2);


    return exec1Path;
}
 

@GetMapping("/downloadExcleModel")
public ResponseEntity downloadExcleModel() throws Exception {
    File file = null;
    try {
        file = new File(SystemUtils.getJavaIoTmpDir(), "加表模板.xlsx");
        return service.downloadExcleModel(file);
    } catch (Exception e) {
        logger.error(e.getMessage(), e);
        throw e;
    } finally {
        if (file != null && file.exists()) {
            file.deleteOnExit();
        }
    }
}
 

/**
 * 拷贝 classpath 中依赖库 jar 资源中的文件到系统临时目录下
 * jar 文件是必须用 java 命令打包的。
 *
 * @param resourceName 待拷贝的 jar 中的文件名称
 *                     参数写法
 *                     "/license.dat" 在 jar 根目录下
 *                     "/abc/license.dat" 在 jar /abc/ 目录下
 * @return 拷贝完成后的文件
 */
public static File copyResourceFileFromJarLibToTmpDir(String resourceName) {
    // 拷贝资源文件到临时目录
    //  { "/license.dat", "/pdfdecrypt.exe", "/SkinMagic.dll" };
    // { "/STCAIYUN.TTF" };
    InputStream inputStream = getResourceFileInputStream(resourceName);

    if (inputStream == null) {
        log.info(resourceName + " not exist in jar liberary.");
        return null;
    }
    //在系统临时目录下建立文件夹，存放拷贝后的文件
    //建立 java_jar_source_temp 文件夹，不用随机数，否则创建文件夹过多
    String tempFilePath =
            SystemUtils.getJavaIoTmpDir()
                    + File.separator + MyConstants.JarTempDir + File.separator
                    + resourceName;

    File resourceFile = new File(tempFilePath);

    System.out.println("resource copy to :" + tempFilePath);

    try {
        // 拷贝资源文件到临时文件夹，每次都覆盖
        FileUtils.copyInputStreamToFile(inputStream, resourceFile);
    } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
        IOUtils.closeQuietly(inputStream);
        return null;
    }


    IOUtils.closeQuietly(inputStream);
    return resourceFile;
}
 

public static File createTemporaryFolder() {
    File baseDir = SystemUtils.getJavaIoTmpDir();
    String baseName = new StringBuilder(BUFFER_NAME).append(System.currentTimeMillis()).append("-").toString();

    for (int counter = 0; counter < TEMP_DIR_ATTEMPTS; counter++) {
        File tempDir = new File(baseDir, baseName + counter);
        if (tempDir.mkdir()) {
            return tempDir;
        }
    }
    throw new IllegalStateException("Failed to create directory within " + TEMP_DIR_ATTEMPTS + " attempts (tried "
            + baseName + "0 to " + baseName + (TEMP_DIR_ATTEMPTS - 1) + ')');
}