Java Code Examples for org.apache.velocity.app.Velocity#mergeTemplate()

private String mergeTemplate(Context context) {
    java.util.Properties property = new java.util.Properties();
    property.setProperty(VelocityEngine.RUNTIME_LOG_LOGSYSTEM_CLASS,
            "org.apache.velocity.runtime.log.NullLogChute");
    property.setProperty(VelocityEngine.RESOURCE_LOADER, "class");
    property.setProperty("class.resource.loader.class",
            "org.apache.velocity.runtime.resource.loader.ClasspathResourceLoader");
    Velocity.init(property);

    StringWriter writer = new StringWriter();
    Velocity.mergeTemplate("templates/convert/convert1.tpl", "UTF-8", context, writer);
    return  writer.toString();
}
 

/**
 * 根据Velocity模板，生成相应的文件
 *
 * @param context VelocityHost
 * @param resultFilePath 生成的文件路径
 * @param templateFile Velocity模板文件
 * @return
 */
public static boolean mergeVelocityContext(VelocityContext context, String resultFilePath, String templateFile)
        throws Exception {
    FileWriter daoWriter = null;
    try {
        daoWriter = new FileWriter(resultFilePath);
        Velocity.mergeTemplate(templateFile, "UTF-8", context, daoWriter);
    } catch (Throwable e) {
        throw e;
    } finally {
        JavaIOUtils.closeWriter(daoWriter);
    }

    return true;
}
 

/**
 * 根据Velocity模板，生成相应的文件
 *
 * @param context VelocityHost
 * @param templateFile Velocity模板文件
 * @return
 */
public static String mergeVelocityContext(VelocityContext context, String templateFile) throws Exception {
    Writer writer = null;
    try {
        writer = new StringWriter();
        Velocity.mergeTemplate(templateFile, "UTF-8", context, writer);
    } catch (Throwable e) {
        throw e;
    } finally {
        JavaIOUtils.closeWriter(writer);
    }

    return writer.toString();
}
 

private void showTasks(HttpServletRequest request, HttpServletResponse response, Collection<TaskRecord> tasks, String title, boolean showDbStats)
        throws IOException {
    if ("json".equals(request.getParameter("format"))) {
        response.setContentType("text/plain");
    } else {
        response.setContentType("text/html");
    }
    int offset = getOffset(request);
    int length = getLength(request);
    // Create Velocity context
    VelocityContext context = new VelocityContext();
    context.put("tasks", tasks);
    context.put("title", title);
    context.put("reportStore", metadata);
    context.put("request", request);
    context.put("offset", offset);
    context.put("length", length);
    context.put("lastResultNum", offset + length - 1);
    context.put("prevOffset", Math.max(0, offset - length));
    context.put("nextOffset", offset + length);
    context.put("showStats", showDbStats);
    context.put("JSON_DATE_FORMAT", JSON_DATE_FORMAT);
    context.put("HTML_DATE_FORMAT", HTML_DATE_FORMAT);
    context.put("PAGE_LENGTH", PAGE_LENGTH);
    // Return Velocity results
    try {
        Velocity.mergeTemplate("tasks.vm", "UTF-8", context, response.getWriter());
        response.setStatus(HttpServletResponse.SC_OK);
    } catch (Exception e) {
        LOG.warn("Failed to display tasks.vm", e);
        response.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR, "Failed to display tasks.vm");
    }
}
 

public String generateConfFile(String template, VelocityContext context) {
	StringWriter sw = new StringWriter();
	try {
		Velocity.mergeTemplate(template + ".vm", "UTF-8", context, sw);
	} catch (Exception ex) {
		log.error("Failed to load velocity template '{}'", template, ex);
		return null;
	}

	return sw.toString();
}
 

/**
 * 渲染Velocity模板
 * @param path
 * @param map
 */
public static String mergeTemplate(String path, Map<String, Object> map) throws IOException {
	VelocityContext vc = new VelocityContext();
	if (null != map) {
		for (String key : map.keySet()) {
			vc.put(key, map.get(key));
		}
	}
	StringWriter w = new StringWriter();
	Velocity.mergeTemplate(path, "utf-8", vc, w);
	String content = w.toString();
	w.close();
	return content;
}
 

/**
 * This is the main method that generates the _Messages.java file.
 * The class is generated by extracting the list of messges from the
 * available LogMessages Resource.
 *
 * The extraction is done based on typeIdentifier which is a 3-digit prefix
 * on the messages e.g. BRK for Broker.
 *
 * @throws InvalidTypeException when an unknown parameter type is used in the properties file
 * @throws Exception            thrown by velocity if there is an error
 */
private void createMessageClass(String file)
        throws InvalidTypeException, Exception
{
    VelocityContext context = new VelocityContext();

    String bundle = file.replace(File.separator, ".");

    int packageStartIndex = bundle.indexOf(_packageSource) + _packageSource.length() + 2;

    bundle = bundle.substring(packageStartIndex, bundle.indexOf(".properties"));

    System.out.println("Creating Class for bundle:" + bundle);

    ResourceBundle fileBundle = ResourceBundle.getBundle(bundle, Locale.US);

    // Pull the bit from /os/path/<className>.logMessages from the bundle name
    String className = file.substring(file.lastIndexOf(File.separator) + 1, file.lastIndexOf("_"));
    debug("Creating ClassName form file:" + className);

    String packageString = bundle.substring(0, bundle.indexOf(className));
    String packagePath = packageString.replace(".", File.separator);

    debug("Package path:" + packagePath);

    File outputDirectory = new File(_outputDir + File.separator + packagePath);
    if (!outputDirectory.exists())
    {
        if (!outputDirectory.mkdirs())
        {
            throw new IllegalAccessException("Unable to create package structure:" + outputDirectory);
        }
    }

    // Get the Data for this class and typeIdentifier
    HashMap<String, Object> typeData = prepareType(className, fileBundle);

    context.put("package", packageString.substring(0, packageString.lastIndexOf('.')));
    //Store the resource Bundle name for the macro
    context.put("resource", bundle);

    // Store this data in the context for the macro to access
    context.put("type", typeData);

    // Create the file writer to put the finished file in
    String outputFile = _outputDir + File.separator + packagePath + className + "Messages.java";
    debug("Creating Java file:" + outputFile);
    FileWriter output = new FileWriter(outputFile);

    // Run Velocity to create the output file.
    // Fix the default file encoding to 'ISO-8859-1' rather than let
    // Velocity fix it. This is the encoding format for the macro.
    Velocity.mergeTemplate("LogMessages.vm", "ISO-8859-1", context, output);

    //Close our file.
    output.flush();
    output.close();
}