Java IOUtils类代码示例

import org.apache.tomcat.util.http.fileupload.IOUtils; //导入依赖的package包/类
/**
 * 通过httpClient get 下载文件
 *
 * @param url      网络文件全路径
 * @param savePath 保存文件全路径
 * @return 状态码 200表示成功
 */
public static int doDownload(String url, String savePath) {
	// 创建默认的HttpClient实例.
	CloseableHttpClient closeableHttpClient = HttpClients.createDefault();
	HttpGet get = new HttpGet(url);
	CloseableHttpResponse closeableHttpResponse = null;
	try {
		closeableHttpResponse = closeableHttpClient.execute(get);
		HttpEntity entity = closeableHttpResponse.getEntity();
		if (entity != null) {
			InputStream in = entity.getContent();
			FileOutputStream out = new FileOutputStream(savePath);
			IOUtils.copy(in, out);
			EntityUtils.consume(entity);
			closeableHttpResponse.close();
		}
		int code = closeableHttpResponse.getStatusLine().getStatusCode();
		closeableHttpClient.close();
		return code;
	} catch (IOException e) {
		e.printStackTrace();
	} finally {
		closeSource(closeableHttpClient, closeableHttpResponse);
	}
	return 0;
}
 

import org.apache.tomcat.util.http.fileupload.IOUtils; //导入依赖的package包/类
/**
 * Generates ARCLib XML from the SIP package using SIP profile.
 *
 * @param sipPath path to the SIP package
 * @param sipProfileId id of the SIP profile
 * @param response response with the ARCLib XML
 *
 * @throws ParserConfigurationException
 * @throws IOException
 * @throws SAXException
 * @throws XPathExpressionException
 * @throws TransformerException
 */
@RequestMapping(value = "/generate", method = RequestMethod.PUT)
public void generateArclibXml(
        @RequestParam("sipPath") String sipPath, @RequestParam("sipProfileId") String sipProfileId, HttpServletResponse response)
        throws ParserConfigurationException, IOException, SAXException, XPathExpressionException, TransformerException {

    String xml = generator.generateArclibXml(sipPath, sipProfileId);
    response.setContentType("application/xml");
    response.setStatus(200);
    response.addHeader("Content-Disposition", "attachment; sipPath=" + sipPath + "_sipProfileId_" + sipProfileId);

    ByteArrayInputStream xmlInputStream = new ByteArrayInputStream(xml.getBytes(StandardCharsets.UTF_8.name()));

    IOUtils.copyLarge(xmlInputStream, response.getOutputStream());
    IOUtils.closeQuietly(xmlInputStream);
}
 

import org.apache.tomcat.util.http.fileupload.IOUtils; //导入依赖的package包/类
private void handlerAjax(HttpServletResponse response, Exception ex) {
    // 设置错误的响应状态码
    response.setStatus(org.apache.http.HttpStatus.SC_INTERNAL_SERVER_ERROR);
    PrintWriter writer = null;
    if (ex instanceof GenericException) {
        try {
            writer = response.getWriter();
            CustomResp customResp = CustomResp.withEx((GenericException) ex);
            writer.write(JSON.toJSONString(customResp));
            writer.flush();
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            IOUtils.closeQuietly(writer);
        }
    }
}
 

import org.apache.tomcat.util.http.fileupload.IOUtils; //导入依赖的package包/类
private static List<Image> fetchFavicons() {

		List<Image> favicons = new ArrayList<Image>(FAVICON_RESOURCE_SUFFIXES.length);

		ByteArrayOutputStream faviconOut = new ByteArrayOutputStream();
		for (String faviconSuffix : FAVICON_RESOURCE_SUFFIXES) {
			try {
				faviconOut.reset();

				InputStream resourceIn = WebzLauncherGUI.class.getResourceAsStream(FAVICON_RESOURCE_PREFIX + faviconSuffix);
				if (resourceIn != null) {

					IOUtils.copy(resourceIn, faviconOut);
					favicons.add(new ImageIcon(faviconOut.toByteArray()).getImage());
				}
			} catch (IOException e) {
				// it's just a favicon - ignore
			}
		}
		return favicons;
	}
 

import org.apache.tomcat.util.http.fileupload.IOUtils; //导入依赖的package包/类
@RequestMapping(value = { "/graph **", "/graph **/**" })
public void graphs(HttpServletRequest request, HttpServletResponse response)
        throws IOException {
    response.setContentType("image/png");

    String path = (String) request
            .getAttribute(HandlerMapping.PATH_WITHIN_HANDLER_MAPPING_ATTRIBUTE);
    stataService.saveCmd(path);

    path = path.substring(7);

    stataService.run("graph display " + path);

    File f = stataService.graph(path);

    InputStream in = new FileInputStream(f);
    IOUtils.copy(in, response.getOutputStream());
}
 

import org.apache.tomcat.util.http.fileupload.IOUtils; //导入依赖的package包/类
public static Properties load(String srcpath){
	Properties config = new Properties();
	try {
		config = loadProperties(srcpath);
	} catch (Exception e) {
		InputStream in = null;
		try {
			in = TomcatConfig.class.getResourceAsStream(srcpath);
			if(in==null)
				throw new RuntimeException("can load resource as stream with : " +srcpath );
			config.load(in);
		} catch (Exception e1) {
			throw new RuntimeException("load config error: " + srcpath, e);
		} finally{
			IOUtils.closeQuietly(in);
		}
	}
	return config;
}
 

import org.apache.tomcat.util.http.fileupload.IOUtils; //导入依赖的package包/类
/**
 * Reads the state of this object during deserialization.
 *
 * @param in The stream from which the state should be read.
 *
 * @throws IOException if an error occurs.
 * @throws ClassNotFoundException if class cannot be found.
 */
private void readObject(ObjectInputStream in)
        throws IOException, ClassNotFoundException {
    // read values
    in.defaultReadObject();

    OutputStream output = getOutputStream();
    if (cachedContent != null) {
        output.write(cachedContent);
    } else {
        FileInputStream input = new FileInputStream(dfosFile);
        IOUtils.copy(input, output);
        dfosFile.delete();
        dfosFile = null;
    }
    output.close();

    cachedContent = null;
}
 

import org.apache.tomcat.util.http.fileupload.IOUtils; //导入依赖的package包/类
@Test
public void testSaveAsDocx() throws FileNotFoundException, IOException{
	
	File inputFile = new File("D:/Workspace/kbase-doc/target/classes/static/DATAS/1512561737109/1.doc");
	File outputFile = new File("D:/Workspace/kbase-doc/target/classes/static/DATAS/1512561737109/1.docx");
	IOUtils.copy(new FileInputStream(inputFile), new FileOutputStream(outputFile));
	
}
 

import org.apache.tomcat.util.http.fileupload.IOUtils; //导入依赖的package包/类
/**
 * Copies the contents of the given {@link InputStream}
 * to the given {@link OutputStream}.
 *
 * @param inputStream The input stream, which is being read.
 *   It is guaranteed, that {@link InputStream#close()} is called
 *   on the stream.
 * @param outputStream The output stream, to which data should
 *   be written. May be null, in which case the input streams
 *   contents are simply discarded.
 * @param closeOutputStream True guarantees, that {@link OutputStream#close()}
 *   is called on the stream. False indicates, that only
 *   {@link OutputStream#flush()} should be called finally.
 * @param buffer Temporary buffer, which is to be used for
 *   copying data.
 * @return Number of bytes, which have been copied.
 * @throws IOException An I/O error occurred.
 */
public static long copy(InputStream inputStream,
        OutputStream outputStream, boolean closeOutputStream,
        byte[] buffer)
throws IOException {
    OutputStream out = outputStream;
    InputStream in = inputStream;
    try {
        long total = 0;
        for (;;) {
            int res = in.read(buffer);
            if (res == -1) {
                break;
            }
            if (res > 0) {
                total += res;
                if (out != null) {
                    out.write(buffer, 0, res);
                }
            }
        }
        if (out != null) {
            if (closeOutputStream) {
                out.close();
            } else {
                out.flush();
            }
            out = null;
        }
        in.close();
        in = null;
        return total;
    } finally {
        IOUtils.closeQuietly(in);
        if (closeOutputStream) {
            IOUtils.closeQuietly(out);
        }
    }
}
 

import org.apache.tomcat.util.http.fileupload.IOUtils; //导入依赖的package包/类
@ApiOperation(value = "Get mandate file")
@RequestMapping(method = GET, value = "/{id}/file")
public void getMandateFile(@PathVariable("id") Long mandateId,
                           @ApiIgnore @AuthenticationPrincipal AuthenticatedPerson authenticatedPerson,
                           HttpServletResponse response) throws IOException {

    Mandate mandate = getMandateOrThrow(mandateId, authenticatedPerson.getUserId());
    response.addHeader("Content-Disposition", "attachment; filename=Tuleva_avaldus.bdoc");

    byte[] content = mandate.getMandate().orElseThrow(() -> new RuntimeException("Mandate is not signed"));

    IOUtils.copy(new ByteArrayInputStream(content), response.getOutputStream());
    response.flushBuffer();

}
 

import org.apache.tomcat.util.http.fileupload.IOUtils; //导入依赖的package包/类
/**
 * Copies the contents of the given {@link InputStream} to the given
 * {@link OutputStream}.
 *
 * @param inputStream
 *            The input stream, which is being read. It is guaranteed, that
 *            {@link InputStream#close()} is called on the stream.
 * @param outputStream
 *            The output stream, to which data should be written. May be
 *            null, in which case the input streams contents are simply
 *            discarded.
 * @param closeOutputStream
 *            True guarantees, that {@link OutputStream#close()} is called
 *            on the stream. False indicates, that only
 *            {@link OutputStream#flush()} should be called finally.
 * @param buffer
 *            Temporary buffer, which is to be used for copying data.
 * @return Number of bytes, which have been copied.
 * @throws IOException
 *             An I/O error occurred.
 */
public static long copy(InputStream inputStream, OutputStream outputStream, boolean closeOutputStream,
		byte[] buffer) throws IOException {
	OutputStream out = outputStream;
	InputStream in = inputStream;
	try {
		long total = 0;
		for (;;) {
			int res = in.read(buffer);
			if (res == -1) {
				break;
			}
			if (res > 0) {
				total += res;
				if (out != null) {
					out.write(buffer, 0, res);
				}
			}
		}
		if (out != null) {
			if (closeOutputStream) {
				out.close();
			} else {
				out.flush();
			}
			out = null;
		}
		in.close();
		in = null;
		return total;
	} finally {
		IOUtils.closeQuietly(in);
		if (closeOutputStream) {
			IOUtils.closeQuietly(out);
		}
	}
}
 

import org.apache.tomcat.util.http.fileupload.IOUtils; //导入依赖的package包/类
private FileResource getFileResource(String path,String type){
    InputStream inputStream = null;
    try {
        ClassPathResource resource = new ClassPathResource(path);
        inputStream = resource.getInputStream();
        File tempFile = File.createTempFile("ds_" + System.currentTimeMillis(), type);
        FileUtils.copyInputStreamToFile(inputStream, tempFile);
        return new FileResource(tempFile);
    } catch (Exception e) {
        e.printStackTrace();
        return null;
    } finally {
        IOUtils.closeQuietly(inputStream);
    }
}
 

import org.apache.tomcat.util.http.fileupload.IOUtils; //导入依赖的package包/类
private void cacheInputStream() throws IOException {
  /* Cache the inputstream in order to read it multiple times. For
   * convenience, I use apache.commons IOUtils
   */
  cachedBytes = new ByteArrayOutputStream();
  IOUtils.copy(super.getInputStream(), cachedBytes);
}
 

import org.apache.tomcat.util.http.fileupload.IOUtils; //导入依赖的package包/类
@RequestMapping("/graph")
public void graph(HttpServletResponse response) throws IOException {
    response.setContentType("image/png");

    stataService.saveCmd("/graph");
    File f = stataService.graph();

    InputStream in = new FileInputStream(f);
    IOUtils.copy(in, response.getOutputStream());
}
 

import org.apache.tomcat.util.http.fileupload.IOUtils; //导入依赖的package包/类
@RequestMapping("/est")
public void est(HttpServletRequest request, HttpServletResponse response)
        throws IOException {
    response.setContentType("text/html");

    String path = (String) request
            .getAttribute(HandlerMapping.PATH_WITHIN_HANDLER_MAPPING_ATTRIBUTE);
    stataService.saveCmd(path);

    File f = stataService.est();

    InputStream in = new FileInputStream(f);
    IOUtils.copy(in, response.getOutputStream());
}