自定义指令(示例)

<@BlockList title="fdsaf" fdsaf="fsdsd">
    <p>fdsafd</p>
</@BlockList>
<@test title = "fds" />

package ljj;
import freemarker.core.Environment;

import freemarker.template.*;

import ljj.api.type.BlockNode;
import java.io.IOException;

import java.io.Writer;

import java.util.Map;
public class NotionBlockListTagDirective implements TemplateDirectiveModel {

private BlockNode[] blockNodes;
@Override
public void execute(Environment environment, Map map, TemplateModel[] templateModels, TemplateDirectiveBody templateDirectiveBody) throws TemplateException, IOException, IOException {
    if (map.containsKey("blockNodes")) {
        DefaultObjectWrapperBuilder builder = new DefaultObjectWrapperBuilder(Configuration.VERSION_2_3_25);
        String method = map.get("blockNodes").toString();
        switch (method) {
            case "tagsList":
                // 将数据对象转换成对应的TemplateModel
                TemplateModel tm = builder.build().wrap("");
                environment.setVariable("tagsList", tm);
                break;
            default:
                break;
        }

    }
    Writer out = environment.getOut();
    out.append("<@test title = \"fds\" />");

    templateDirectiveBody.render(out);
}

}

Configuration cfg = new Configuration(Configuration.VERSION_2_3_29);
ClassLoader classLoader = cfg.getClass().getClassLoader();

URL resource = classLoader.getResource("htmlTemplate/");

if (null == resource) return;

String jsonPath = URLDecoder.decode(resource.getPath(), "UTF-8");

// 如果运行在windows上，获取到的path会变成"/E:/Convert..."，直接使用的话会报错（会提示：the char ':' is illegal），需要处理一下

System.out.println(jsonPath);

cfg.setDirectoryForTemplateLoading(new File(jsonPath.contains(":") ? jsonPath.substring(1) : jsonPath));
Template temp = cfg.getTemplate("page.ftl");

//输出到console

Writer out = new OutputStreamWriter(System.out);

HashMap<String, Object> dataModel = new HashMap<>();

dataModel.put("blocksTemplate", sb.toString());

//自定义标签

cfg.setSharedVariable("BlockList", new NotionBlockListTagDirective());



temp.process(dataModel, out);

StringWriter stringWriter = new StringWriter();
temp.process(dataModel, stringWriter);
String pageTemplate = stringWriter.toString();