freemaker js封装

import freemarker.template.Configuration;
import freemarker.template.Template;
import freemarker.template.TemplateExceptionHandler;

import java.io.StringWriter;
import java.util.Map;

public class FreeMarkerUtil {

    private static Configuration cfg;

    static {
        cfg = new Configuration(Configuration.VERSION_2_3_30);
        // 设置模板目录
        cfg.setClassForTemplateLoading(FreeMarkerUtil.class, "/templates");
        // 设置异常处理器
        cfg.setDefaultEncoding("UTF-8");
        cfg.setTemplateExceptionHandler(TemplateExceptionHandler.RETHROW_HANDLER);
        cfg.setLogTemplateExceptions(false);
        cfg.setWrapUncheckedExceptions(true);
        cfg.setFallbackOnNullLoopVariable(false);
    }

    public static String processTemplate(String templateName, Map<String, Object> dataModel) throws Exception {
        Template template = cfg.getTemplate(templateName);
        StringWriter out = new StringWriter();
        template.process(dataModel, out);
        return out.toString();
    }
}

Map<String, Object> data = new HashMap<>();
data.put("message", "Hello, FreeMarker!");
String renderedHtml = FreeMarkerUtil.processTemplate("hello.ftl", data);