Example usage for javax.servlet.http HttpServletResponse setContentType

List of usage examples for javax.servlet.http HttpServletResponse setContentType

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Introduction

In this page you can find the example usage for javax.servlet.http HttpServletResponse setContentType.

Prototype


public void setContentType(String type);

Source Link

Document

Sets the content type of the response being sent to the client, if the response has not been committed yet.

Usage

From source file:cn.guoyukun.spring.web.utils.DownloadUtils.java

public static void download(HttpServletRequest request, HttpServletResponse response, String filePath,
        String displayName) throws IOException {
    File file = new File(filePath);

    if (StringUtils.isEmpty(displayName)) {
        displayName = file.getName();//from w  w  w .j  ava  2s  .  co  m
    }

    if (!file.exists() || !file.canRead()) {
        response.setContentType("text/html;charset=utf-8");
        response.getWriter().write("??");
        return;
    }

    String userAgent = request.getHeader("User-Agent");
    boolean isIE = (userAgent != null) && (userAgent.toLowerCase().indexOf("msie") != -1);

    response.reset();
    response.setHeader("Pragma", "No-cache");
    response.setHeader("Cache-Control", "must-revalidate, no-transform");
    response.setDateHeader("Expires", 0L);

    response.setContentType("application/x-download");
    response.setContentLength((int) file.length());

    String displayFilename = displayName.substring(displayName.lastIndexOf("_") + 1);
    displayFilename = displayFilename.replace(" ", "_");
    if (isIE) {
        displayFilename = URLEncoder.encode(displayFilename, "UTF-8");
        response.setHeader("Content-Disposition", "attachment;filename=\"" + displayFilename + "\"");
    } else {
        displayFilename = new String(displayFilename.getBytes("UTF-8"), "ISO8859-1");
        response.setHeader("Content-Disposition", "attachment;filename=" + displayFilename);
    }
    BufferedInputStream is = null;
    OutputStream os = null;
    try {

        os = response.getOutputStream();
        is = new BufferedInputStream(new FileInputStream(file));
        IOUtils.copy(is, os);
    } catch (Exception e) {
        e.printStackTrace();
    } finally {
        IOUtils.closeQuietly(is);
    }
}

From source file:com.dgq.utils.Struts2Utils.java

/**
 * ?contentTypeheaders.//from w w w .  j ava  2  s. c o m
 */
private static HttpServletResponse initResponseHeader(final String contentType, final String... headers) {
    // ?headers?
    String encoding = DEFAULT_ENCODING;
    boolean noCache = DEFAULT_NOCACHE;
    for (String header : headers) {
        String headerName = StringUtils.substringBefore(header, ":");
        String headerValue = StringUtils.substringAfter(header, ":");

        if (StringUtils.equalsIgnoreCase(headerName, HEADER_ENCODING)) {
            encoding = headerValue;
        } else if (StringUtils.equalsIgnoreCase(headerName, HEADER_NOCACHE)) {
            noCache = Boolean.parseBoolean(headerValue);
        } else {
            throw new IllegalArgumentException(headerName + "??header");
        }
    }

    HttpServletResponse response = getResponse();

    // headers?
    String fullContentType = contentType + ";charset=" + encoding;
    response.setContentType(fullContentType);
    if (noCache) {
        ServletUtils.setNoCacheHeader(response);
    }

    return response;
}

From source file:co.edu.UNal.ArquitecturaDeSoftware.Bienestar.Vista.App.Usuario.Read.java

protected static void obtenerTotalConvocatorias(HttpServletRequest request, HttpServletResponse response)
        throws IOException {
    int numC = CtrlUsuario.obtenerTotalConvocatorias();
    response.setContentType("application/json;charset=UTF-8");
    PrintWriter out = response.getWriter();
    JSONObject obj = new JSONObject();
    obj.put("total", numC);
    out.print(obj);// w w  w . j a v  a  2s.  c o  m
}

From source file:net.mindengine.oculus.frontend.web.controllers.display.FileDisplayController.java

public static void showFile(HttpServletResponse response, String path, String fileName, String contentType)
        throws IOException {
    File file = new File(path);
    response.setBufferSize((int) file.length());
    response.setHeader("Content-Disposition", "attachment; filename=\"" + fileName + "\"");

    response.setContentType(contentType);
    response.setContentLength((int) file.length());

    byte[] bytes = new byte[(int) file.length()];
    FileInputStream fis = new FileInputStream(file);
    fis.read(bytes);/*  w w  w.  java 2  s . com*/
    fis.close();

    FileCopyUtils.copy(bytes, response.getOutputStream());
}

From source file:jease.site.Streams.java

/**
 * Write given file to response./* ww  w. j  av  a 2  s  .c o  m*/
 * 
 * If the given content type denotes a browser supported image, the image
 * will be automatically scaled if either "scale" is present as request
 * paramter or JEASE_IMAGE_LIMIT is set in Registry.
 */
public static void write(HttpServletRequest request, HttpServletResponse response, File file,
        String contentType) throws IOException {
    if (Images.isBrowserCompatible(contentType)) {
        int scale = NumberUtils.toInt(request.getParameter("scale"));
        if (scale > 0) {
            java.io.File scaledImage = Images.scale(file, scale);
            scaledImage.deleteOnExit();
            response.setContentType(contentType);
            response.setContentLength((int) scaledImage.length());
            Files.copy(scaledImage.toPath(), response.getOutputStream());
            return;
        }
        int limit = NumberUtils.toInt(Registry.getParameter(Names.JEASE_IMAGE_LIMIT));
        if (limit > 0) {
            java.io.File scaledImage = Images.limit(file, limit);
            scaledImage.deleteOnExit();
            response.setContentType(contentType);
            response.setContentLength((int) scaledImage.length());
            Files.copy(scaledImage.toPath(), response.getOutputStream());
            return;
        }

    }
    response.setContentType(contentType);
    response.setContentLength((int) file.length());
    Files.copy(file.toPath(), response.getOutputStream());
}

From source file:ch.rasc.downloadchart.DownloadChartServlet.java

private static void handlePng(HttpServletResponse response, byte[] imageData, Integer width, Integer height,
        String filename) throws IOException {

    response.setContentType("image/png");
    response.setHeader("Content-Disposition", "attachment; filename=\"" + filename + ".png\";");

    writeImage(response, imageData, width, height, "png");
}

From source file:ch.rasc.downloadchart.DownloadChartServlet.java

private static void handleGif(HttpServletResponse response, byte[] imageData, Integer width, Integer height,
        String filename) throws IOException {

    response.setContentType("image/gif");
    response.setHeader("Content-Disposition", "attachment; filename=\"" + filename + ".gif\";");

    writeImage(response, imageData, width, height, "gif");
}

From source file:com.age.core.utils.web.ServletUtils.java

/**
 * ?json// w ww .  jav a  2s .  c  om
 * @param response
 * @param object
 */
public static void responseJson(HttpServletResponse response, Object object) {
    JsonMapper jsonMapper = JsonMapper.buildNormalMapper();
    String jsonStr = jsonMapper.toJson(object);
    try {
        response.setContentType("text/plain");
        response.getWriter().write(jsonStr);
        response.getWriter().flush();
        response.getWriter().close();
    } catch (IOException e) {
    }
}

From source file:com.eucalyptus.www.X509Download.java

public static void hasError(int statusCode, String message, HttpServletResponse response) {
    try {/* www .  j  a va 2s . co  m*/
        response.setStatus(statusCode);
        response.setContentType("text/plain; charset=utf-8");
        response.getWriter().print(getError(message));
        response.getWriter().flush();
    } catch (IOException e) {
        e.printStackTrace();
    }
}

From source file:net.mindengine.oculus.frontend.web.controllers.display.FileDisplayController.java

public static void showTextFile(HttpServletResponse response, String path, String fileName, String contentType)
        throws IOException {

    OutputStream os = response.getOutputStream();
    OutputStreamWriter w = new OutputStreamWriter(os);
    response.setHeader("Content-Disposition", "attachment; filename=\"" + fileName + "\"");
    response.setContentType(contentType);
    response.setCharacterEncoding("UTF-8");
    String content = readFileAsString(path);
    w.write(content);//w w  w  .  j  ava  2  s  . c  om
    w.flush();
    os.flush();
    os.close();
}