新增markdown格式预览支持

jodconverter-web/src/main/java/cn/keking/service/impl/MarkdownFilePreviewImpl.java

@@ -0,0 +1,27 @@
+package cn.keking.service.impl;
+
+import cn.keking.model.FileAttribute;
+import cn.keking.service.FilePreview;
+import org.springframework.stereotype.Service;
+import org.springframework.ui.Model;
+
+/**
+ * @author kl (http://kailing.pub)
+ * @since 2020/12/25
+ */
+@Service
+public class MarkdownFilePreviewImpl implements FilePreview {
+
+    private final SimTextFilePreviewImpl simTextFilePreview;
+
+    public MarkdownFilePreviewImpl(SimTextFilePreviewImpl simTextFilePreview) {
+        this.simTextFilePreview = simTextFilePreview;
+    }
+
+
+    @Override
+    public String filePreviewHandle(String url, Model model, FileAttribute fileAttribute) {
+        model.addAttribute("markdown","true");
+        return simTextFilePreview.filePreviewHandle(url, model, fileAttribute);
+    }
+}