/** * FreeMarker 辅助类 * @author Rubekid * */public class FreeMarkerHelper {        /**     * 模板文件存放目录     */    private static final String TEMPLATE_PATH = "/templates/freemarker/";        /**     * 获取模板内容     * @param tpl     * @param rootMap     * @return     * @throws IOException     * @throws TemplateException     */    public static String fetch(String tpl, Object rootMap) throws IOException, TemplateException{        Template template = getTemplate(tpl);        Writer out= new StringWriter();        template.process(rootMap, out);        String result = out.toString();        out.flush();        return result;    }        /**     * 输出显示     * @param tpl     * @param rootMap     * @param out     * @throws IOException     * @throws TemplateException     */    public static void display(String  tpl, Object rootMap, Writer out) throws IOException, TemplateException{        Template template = getTemplate(tpl);        template.process(rootMap, out);        out.flush();    }        /**     * 获取模板     * @param tpl     * @return     * @throws IOException     */    private static Template getTemplate(String tpl) throws IOException{        Configuration config = new Configuration();        String path = WebUtils.getContextPath() + TEMPLATE_PATH;        String name =  tpl;        int pos = tpl.lastIndexOf("/");        if(pos > -1){            path += tpl.substring( 0, pos+1 );            name += tpl.substring( pos+1 );        }                config.setDirectoryForTemplateLoading(new File(path));        config.setObjectWrapper(new DefaultObjectWrapper());        return  config.getTemplate(name ,"utf-8");    }        /**     * 获取模板（通过字符串）     * @param source     * @throws IOException      */    private static Template getTemplate(String name, String source) throws IOException{        Configuration config = new Configuration();        StringTemplateLoader loader = new StringTemplateLoader();        loader.putTemplate(name, source);        config.setTemplateLoader(loader);        return config.getTemplate(name, "utf-8");    }