判断文件是否存在

jaychuo · Jan 4, 2024 · 15e9cb6 · 15e9cb6
1 parent 36d984a
commit 15e9cb6
Show file tree

Hide file tree

Showing 2 changed files with 8 additions and 3 deletions.
diff --git a/...d-core/src/main/java/com/github/linyuzai/download/core/source/file/FileSourceFactory.java b/...d-core/src/main/java/com/github/linyuzai/download/core/source/file/FileSourceFactory.java
@@ -1,6 +1,7 @@
 package com.github.linyuzai.download.core.source.file;
 
 import com.github.linyuzai.download.core.context.DownloadContext;
+import com.github.linyuzai.download.core.exception.DownloadException;
 import com.github.linyuzai.download.core.options.DownloadOptions;
 import com.github.linyuzai.download.core.source.Source;
 import com.github.linyuzai.download.core.source.SourceFactory;
@@ -20,10 +21,14 @@ public boolean support(Object source, DownloadContext context) {
 
     @Override
     public Source create(Object source, DownloadContext context) {
+        File file = (File) source;
+        if (!file.exists()) {
+            throw new DownloadException("File not exists: '" + file.getAbsolutePath() + "'");
+        }
         DownloadOptions options = DownloadOptions.get(context);
         Charset charset = options.getCharset();
         return new FileSource.Builder<>()
-                .file((File) source)
+                .file(file)
                 .charset(charset)
                 .build();
     }

diff --git a/...src/main/java/com/github/linyuzai/concept/sample/download/ConceptDownloadController2.java b/...src/main/java/com/github/linyuzai/concept/sample/download/ConceptDownloadController2.java
@@ -40,8 +40,8 @@ public void error() {
 
     @Download
     @GetMapping("/empty")
-    public void empty() {
-
+    public String empty() {
+        return "file:/empty";
     }
 
     @GetMapping("text")