implementation 'org.springframework.boot:spring-boot-starter-freemarker'

@Slf4j
public class FreeMarkerUtils {

    static Configuration cfg = new Configuration(Configuration.DEFAULT_INCOMPATIBLE_IMPROVEMENTS);

    static {
        cfg.setEncoding(Locale.ENGLISH, "utf-8");
        cfg.setTemplateLoader(new SpringTemplateLoader(new DefaultResourceLoader(),"templates/"));
    }

    /**
     * 獲取模板
     *
     * @param templateName
     * @return
     */
    public static Template getTpl(String templateName){
        try {
            Template template = cfg.getTemplate(templateName);
            return template;
        } catch (Exception e) {
            log.error("獲取模板失敗 {}",templateName,e);
            return null;
        }
    }

    /**
     * 獲取模板寫入后的內(nèi)容
     *
     * @param templateName
     * @param model
     * @return
     */
    public static Optional<String> getTplText(String templateName, Map<String, Object> model){
        try {
            Template template = cfg.getTemplate(templateName);
            String text = FreeMarkerTemplateUtils.processTemplateIntoString(template, model);
            return Optional.ofNullable(text);
        } catch (Exception e) {
            log.error("獲取模板內(nèi)容失敗 {}",templateName,e);
            return Optional.empty();
        }
    }


}

<#list list as item>
    ${item.url} | ${item.name} | ${item.age}
</#list>

Map<String, Object> model = new HashMap<>();
model.put("list", new ArrayList())
FreeMarkerUtils.getTplText("a.html", model);