文件下载下载方法修改

platform/src/main/java/com/jzg/controller/FileUploadController.java

@@ -20,9 +20,11 @@ import org.springframework.web.multipart.MultipartFile;
 import java.io.IOException;
 import java.io.InputStream;
 import java.net.MalformedURLException;
+import java.net.URI;
 import java.net.URL;
 import java.net.URLConnection;
-import java.net.URLDecoder;
+import java.net.URLEncoder;
+import java.nio.charset.StandardCharsets;
 import java.time.LocalDateTime;
 
 /**
@@ -75,7 +77,9 @@ public class FileUploadController extends BaseController {
     public HttpResult<SysUploadFiles> uploadUrlFile(String urlString, String fileName) {
         SysUploadFiles sysUploadFiles = new SysUploadFiles();
         try {
-            URL url = new URL(URLDecoder.decode(urlString));
+            // Spring MVC 会自动 URL 解码，需重新编码含中文的 URL
+            String safeUrl = encodeUrlQuery(urlString);
+            URL url = new URL(safeUrl);
             URLConnection connection = url.openConnection();
             // 获取文件大小
             long contentLength = connection.getContentLengthLong();
@@ -101,6 +105,45 @@ public class FileUploadController extends BaseController {
     }
 
 
+    /**
+     * 对 URL 中的 query 参数进行编码（Spring @RequestParam 会自动解码，需在此重新编码中文等非ASCII字符）
+     */
+    private String encodeUrlQuery(String urlStr) {
+        try {
+            URL url = new URL(urlStr);
+            String query = url.getQuery();
+            if (query == null || query.isEmpty()) {
+                return urlStr;
+            }
+            // 逐个参数编码
+            StringBuilder encodedQuery = new StringBuilder();
+            String[] params = query.split("&");
+            for (int i = 0; i < params.length; i++) {
+                if (i > 0) {
+                    encodedQuery.append("&");
+                }
+                int eqIdx = params[i].indexOf('=');
+                if (eqIdx > 0) {
+                    String key = params[i].substring(0, eqIdx);
+                    String value = params[i].substring(eqIdx + 1);
+                    encodedQuery.append(URLEncoder.encode(key, StandardCharsets.UTF_8))
+                            .append("=")
+                            .append(URLEncoder.encode(value, StandardCharsets.UTF_8));
+                } else {
+                    encodedQuery.append(params[i]);
+                }
+            }
+            // 用 URI 重建 URL，确保路径和 query 都正确编码
+            int port = url.getPort();
+            String authority = port == -1 ? url.getHost() : url.getHost() + ":" + port;
+            URI uri = new URI(url.getProtocol(), authority, url.getPath(),
+                    encodedQuery.toString(), url.getRef());
+            return uri.toASCIIString();
+        } catch (Exception e) {
+            return urlStr; // 兜底返回原值
+        }
+    }
+
     private String getFileExtension(String fileName) {
         return fileName.substring(fileName.lastIndexOf("."));
     }