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:com.igrow.mall.common.util.Struts2Utils.java

/**
 * ./*w  w  w.j a  v a 2 s .c o m*/
        
 * eg.
 * render("text/plain", "hello", "encoding:GBK");
 * render("text/plain", "hello", "no-cache:false");
 * render("text/plain", "hello", "encoding:GBK", "no-cache:false");
 * 
 * @param headers ??header??"encoding:""no-cache:",UTF-8true.
 */
public static void render(final String contentType, final String content, final String... headers) {
    try {
        //?headers?
        String encoding = ENCODING_DEFAULT;
        boolean noCache = NOCACHE_DEFAULT;
        for (String header : headers) {
            String headerName = StringUtils.substringBefore(header, ":");
            String headerValue = StringUtils.substringAfter(header, ":");

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

        HttpServletResponse response = ServletActionContext.getResponse();

        //headers?
        String fullContentType = contentType + ";charset=" + encoding;
        response.setContentType(fullContentType);
        if (noCache) {
            response.setHeader("Pragma", "No-cache");
            response.setHeader("Cache-Control", "no-cache");
            response.setDateHeader("Expires", 0);
        }

        response.getWriter().write(content);
        response.getWriter().flush();

    } catch (IOException e) {
        logger.error(e.getMessage(), e);
    }
}

From source file:com.tn.exam.util.web.springside.Struts2Utils.java

/**
 * ?contentTypeheaders.//from ww  w . j  a v a  2s  .  co 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 = ServletActionContext.getResponse();

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

    return response;
}

From source file:com.mtt.myapp.common.util.FileDownloadUtil.java

/**
 * Provide file download from the given file path.
 * @param response {@link javax.servlet.http.HttpServletResponse}
 * @param desFile file path//from   ww  w .  j a  v  a  2  s.c om
 * @return true if succeeded
 */
public static boolean downloadFile(HttpServletResponse response, File desFile) {
    if (desFile == null || !desFile.exists()) {
        return false;
    }
    boolean result = true;
    response.reset();
    response.addHeader("Content-Disposition", "attachment;filename=" + desFile.getName());
    response.setContentType("application/octet-stream");
    response.addHeader("Content-Length", "" + desFile.length());
    InputStream fis = null;
    byte[] buffer = new byte[FILE_DOWNLOAD_BUFFER_SIZE];
    OutputStream toClient = null;
    try {
        fis = new BufferedInputStream(new FileInputStream(desFile));
        toClient = new BufferedOutputStream(response.getOutputStream());
        int readLength;
        while (((readLength = fis.read(buffer)) != -1)) {
            toClient.write(buffer, 0, readLength);
        }
        toClient.flush();
    } catch (FileNotFoundException e) {
        LOGGER.error("file not found:" + desFile.getAbsolutePath(), e);
        result = false;
    } catch (IOException e) {
        LOGGER.error("read file error:" + desFile.getAbsolutePath(), e);
        result = false;
    } finally {
        IOUtils.closeQuietly(fis);
        IOUtils.closeQuietly(toClient);
    }
    return result;
}

From source file:com.zving.platform.SysInfo.java

public static void downloadDB(HttpServletRequest request, HttpServletResponse response) {
    try {/* w w  w  .  ja va  2 s.  c om*/
        request.setCharacterEncoding(Constant.GlobalCharset);
        response.reset();
        response.setContentType("application/octet-stream");
        response.setHeader("Content-Disposition",
                "attachment; filename=DB_" + DateUtil.getCurrentDate("yyyyMMddHHmmss") + ".dat");
        OutputStream os = response.getOutputStream();

        String path = Config.getContextRealPath() + "WEB-INF/data/backup/DB_"
                + DateUtil.getCurrentDate("yyyyMMddHHmmss") + ".dat";
        new DBExport().exportDB(path);

        byte[] buffer = new byte[1024];
        int read = -1;
        FileInputStream fis = null;
        try {
            fis = new FileInputStream(path);
            while ((read = fis.read(buffer)) != -1)
                if (read > 0) {
                    byte[] chunk = (byte[]) null;
                    if (read == 1024) {
                        chunk = buffer;
                    } else {
                        chunk = new byte[read];
                        System.arraycopy(buffer, 0, chunk, 0, read);
                    }
                    os.write(chunk);
                    os.flush();
                }
        } finally {
            if (fis != null) {
                fis.close();
            }
        }
        os.flush();
        os.close();
    } catch (IOException e) {
        e.printStackTrace();
    } catch (Exception e) {
        e.printStackTrace();
    }
}

From source file:co.edu.UNal.ArquitecturaDeSoftware.Bienestar.Vista.App.Admin.CRUDUsuarios.java

protected static void eliminarUsuario(HttpServletRequest request, HttpServletResponse response)
        throws IOException {
    ArrayList r = CtrlAdmin.eliminarUsuario(Integer.parseInt(request.getParameter("1"))); // id_usuario

    response.setContentType("application/json;charset=UTF-8");
    PrintWriter out = response.getWriter();
    if (r.get(0) == "error") {
        JSONObject obj = new JSONObject();
        if (r.get(1) == "usuario") {
            obj.put("isError", true);
            obj.put("errorDescrip", "El usuario no existe");

        } else {/*from w  w  w. j  av a 2s . com*/
            Util.errordeRespuesta(r, out);
        }
        out.print(obj);
    } else if (r.get(0) == "isExitoso") {
        JSONObject obj = new JSONObject();
        obj.put("Exitoso", true);
        out.print(obj);
    } else
        Util.errordeRespuesta(r, out);
}

From source file:co.edu.UNal.ArquitecturaDeSoftware.Bienestar.Vista.App.Admin.CRUDUsuarios.java

protected static void leerUsuarioId(HttpServletRequest request, HttpServletResponse response)
        throws IOException {
    UsuarioEntity e = CtrlAdmin.leerUsuarioId(Integer.parseInt(request.getParameter("1"))); // id del usuario

    response.setContentType("application/json;charset=UTF-8");
    PrintWriter out = response.getWriter();

    JSONObject obj = new JSONObject();
    obj.put("id", e.getIdUsuario());
    obj.put("nombre", e.getNombres());
    obj.put("apellido", e.getApellidos());
    obj.put("tipoDocumento", e.gettDocumento());
    obj.put("documento", e.getDocumento());
    obj.put("contrasena", e.getPassword());
    obj.put("rol", "" + e.getRol());
    obj.put("email", e.getUsername());
    out.print(obj);/*from  ww w . ja v  a  2s  .c  o m*/
}

From source file:com.szl.common.utils.Struts2Utils.java

/**
 * ?contentTypeheaders.//  ww w  .j a  va 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 = ServletActionContext.getResponse();

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

    return response;
}

From source file:cn.newtouch.util.Struts2Utils.java

/**
 * ?contentTypeheaders./*www . j  a  va 2  s  .c  om*/
 */
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 = ServletActionContext.getResponse();

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

    return response;
}

From source file:com.eryansky.common.web.utils.DownloadUtils.java

/**
 * /*from  w  w  w.j a v a 2  s.  c  om*/
 * @param request
 * @param response
 * @param filePath 
 * @param displayName ??
 * @throws IOException
 */
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();
    }
    if (!file.exists() || !file.canRead()) {
        response.setContentType("text/html;charset=utf-8");
        response.getWriter().write("??");
        return;
    }

    download(request, response, new FileInputStream(file), displayName);
}

From source file:org.jivesoftware.openfire.reporting.graph.GraphServlet.java

private static void writeImageContent(HttpServletResponse response, byte[] imageData, String contentType)
        throws IOException {
    ServletOutputStream os = response.getOutputStream();
    response.setContentType(contentType);
    os.write(imageData);/*from  w w  w.j  av  a2 s  .  c  om*/
    os.flush();
    os.close();
}