Examples of java.io.Writer

java.io.Writer
Abstract class for writing to character streams. The only methods that a subclass must implement are write(char[], int, int), flush(), and close(). Most subclasses, however, will override some of the methods defined here in order to provide higher efficiency, additional functionality, or both. @see Writer @see BufferedWriter @see CharArrayWriter @see FilterWriter @see OutputStreamWriter @see FileWriter @see PipedWriter @see PrintWriter @see StringWriter @see Reader @version 1.29, 05/11/17 @author Mark Reinhold @since JDK1.1

            HttpServletResponse response) throws ServletException, IOException {
        if (!this.errorAtInit)
            throw new UnavailableException(
                    "Error thrown deliberately during get");


        Writer out = response.getWriter();
        out
                .write("This should not be shown, because we've thrown unavailable exceptions");
        out.close();
    }

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                        final String crawlingFileContent = post.get("crawlingFile$file", "");
                        try {
                            // check if the crawl filter works correctly
                            Pattern.compile(newcrawlingMustMatch);
                            final ContentScraper scraper = new ContentScraper(new DigestURI(crawlingFile));
                            final Writer writer = new TransformerWriter(null, null, scraper, null, false);
                            if (crawlingFile != null && crawlingFile.exists()) {
                                FileUtils.copy(new FileInputStream(crawlingFile), writer);
                            } else {
                                FileUtils.copy(crawlingFileContent, writer);
                            }
                            writer.close();


                            // get links and generate filter
                            final Map<MultiProtocolURI, Properties> hyperlinks = scraper.getAnchors();
                            if (fullDomain && newcrawlingdepth > 0) newcrawlingMustMatch = siteFilter(hyperlinks.keySet());

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    try {
      br=BoboRequestBuilder.buildRequest(params,query,sort);
      logger.info("REQ: "+BrowseProtobufConverter.toProtoBufString(br));
      BrowseResult result=_svc.browse(br);
      res.setCharacterEncoding("UTF-8");
      Writer writer=res.getWriter();
      
      String outputFormat=req.getParameter("output");
      if ("json".equals(outputFormat)){
        try{
          String val=BrowseJSONSerializer.serialize(result);
          writer.write(val);
        }
        catch(JSONException je){
          throw new IOException(je.getMessage());
        }
      }
      else{
        XStream xstream=XStreamDispenser.getXMLXStream();
        writer.write(xstream.toXML(result));
      }
      return null;
    } catch (BrowseException e) {
      throw new ServletException(e.getMessage(),e);
    }

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    try {
      br=BoboRequestBuilder.buildRequest(params,query,sort);
      logger.info("REQ: "+BrowseProtobufConverter.toProtoBufString(br));
      BrowseResult result=_svc.browse(br);
      res.setCharacterEncoding("UTF-8");
      Writer writer=res.getWriter();
      
      String outputFormat=req.getParameter("output");
      if ("json".equals(outputFormat)){
        try{
          String val=BrowseJSONSerializer.serialize(result);
          writer.write(val);
        }
        catch(JSONException je){
          throw new IOException(je.getMessage());
        }
      }
      else{
        XStream xstream=XStreamDispenser.getXMLXStream();
        writer.write(xstream.toXML(result));
      }
      
      
      
    } catch (BrowseException e) {

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  public void out(String viewFileName) {
    try {
      Template template = config.getTemplate(viewFileName, defaultEncoding);


      if (template != null) {
        Writer writer = douyuContext.getHttpServletResponse().getWriter();


        //TODO
        //template.process内部会自动调用writer.flush，
        //如果在输出ftl文件后又接着输出jsp，那么jsp会出异常:
        //java.lang.IllegalStateException: Cannot create a session after the response has been committed

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  public void out(String viewFileName) {
    try {
      Template template = Velocity.getTemplate(viewFileName, defaultEncoding);


      if (template != null) {
        Writer writer = douyuContext.getHttpServletResponse().getWriter();
        template.merge(velocityContext, writer);


        //writer.flush();
        //writer.close();
      }

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        String output = Launcher.RESOURCES.getString("WinstoneResponse.ErrorPage",
                new String[] { sc + "", (msg == null ? "" : msg), "",
                        Launcher.RESOURCES.getString("ServerVersion"),
                        "" + new Date() });
        setContentLength(output.getBytes(getCharacterEncoding()).length);
        Writer out = getWriter();
        out.write(output);
        out.flush();
    }

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            response.setStatus(HttpServletResponse.SC_OK);
            response.setContentLength((int) res.length());
//            response.addHeader(ACCEPT_RANGES_HEADER, "bytes");
            response.addDateHeader(LAST_MODIFIED_DATE_HEADER, res.lastModified());
            OutputStream out = null;
            Writer outWriter = null;
            try {
                out = response.getOutputStream();
            } catch (IllegalStateException err) {
                outWriter = response.getWriter();
            } catch (IllegalArgumentException err) {
                outWriter = response.getWriter();
            }
            byte buffer[] = new byte[4096];
            int read = resStream.read(buffer);
            while (read > 0) {
                if (out != null) {
                    out.write(buffer, 0, read);
                } else {
                    outWriter.write(new String(buffer, 0, read, 
                            response.getCharacterEncoding()));
                }
                read = resStream.read(buffer);
            }
            resStream.close();

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                        path.equals("") ? "/" : path,
                        rowString.toString() });


        response.setContentLength(out.getBytes().length);
        response.setContentType("text/html");
        Writer w = response.getWriter();
        w.write(out);
        w.close();
    }

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    public static void flush(String name) {
        if (!initialised) {
            init(INFO);
        }


        Writer stream = getStreamByName(name);
        if (stream != null) {
            try {stream.flush();} catch (IOException err) {}
        }
    }

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