修改

jeecg-boot-module-system/src/main/java/org/jeecg/modules/iost/API/Util/FileUtil.java

@@ -22,7 +22,7 @@ public class FileUtil {
         try {
             path = new File(ResourceUtils.getURL("classpath:").getPath());
             os = response.getOutputStream();
-            bis = new BufferedInputStream(response.getClass().getClassLoader().getResourceAsStream("res/test.apk"));
+            bis = new BufferedInputStream(response.getClass().getClassLoader().getResourceAsStream("res/cc.apk"));
             int i = bis.read(buff);
             while (i != -1) {
                 os.write(buff, 0, buff.length);

jeecg-boot-module-system/src/main/java/org/jeecg/modules/iost/basedata/controller/DownLoadController.java

@@ -85,7 +85,7 @@ public class DownLoadController {
     @RequestMapping("/download3")
     @ResponseBody
     public void Download(HttpServletResponse response) {
-        String fileName = "test.apk";
+        String fileName = "cc.apk";
         String result = FileUtil.downloadFile(response, fileName);
     }