新增cad三维看图能力相关

cf-framework/cf-common/src/main/java/com/cf/imes/framework/common/util/servlet/ServletUtils.java

@@ -50,6 +50,21 @@ public class ServletUtils {
         IoUtil.write(response.getOutputStream(), false, content);
     }
 
+    /**
+     * 返回附件文本
+     *
+     * @param response 响应
+     * @param filename 文件名
+     * @param content  附件内容
+     */
+    public static void writeAttachmentText(HttpServletResponse response, String filename, byte[] content) throws IOException {
+        // 设置 header 和 contentType
+        response.setHeader("Content-Disposition", "attachment;filename=" + URLEncoder.encode(filename, "UTF-8"));
+        response.setContentType(MediaType.TEXT_PLAIN_VALUE);
+        // 输出附件
+        IoUtil.write(response.getOutputStream(), false, content);
+    }
+
     /**
      * @param request 请求
      * @return ua