✨ 增加系统监控及日志下载功能

src/main/java/im/zhaojun/common/util/FileUtil.java

@@ -0,0 +1,68 @@
+package im.zhaojun.common.util;
+
+import cn.hutool.core.util.URLUtil;
+import org.springframework.core.io.FileSystemResource;
+import org.springframework.http.HttpHeaders;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.MediaType;
+import org.springframework.http.ResponseEntity;
+
+import java.io.File;
+import java.util.Date;
+
+/**
+ * @author zhaojun
+ */
+public class FileUtil {
+
+    public static ResponseEntity<Object> export(File file, String fileName) {
+        if (!file.exists()) {
+            return ResponseEntity.status(HttpStatus.NOT_FOUND).body("404 FILE NOT FOUND");
+        }
+
+        MediaType mediaType = MediaType.APPLICATION_OCTET_STREAM;
+
+        HttpHeaders headers = new HttpHeaders();
+        headers.add("Cache-Control", "no-cache, no-store, must-revalidate");
+
+        if (StringUtils.isNullOrEmpty(fileName)) {
+            fileName = file.getName();
+        }
+
+        headers.setContentDispositionFormData("attachment", URLUtil.encode(fileName));
+
+        headers.add("Pragma", "no-cache");
+        headers.add("Expires", "0");
+        headers.add("Last-Modified", new Date().toString());
+        headers.add("ETag", String.valueOf(System.currentTimeMillis()));
+        return ResponseEntity
+                .ok()
+                .headers(headers)
+                .contentLength(file.length())
+                .contentType(mediaType)
+                .body(new FileSystemResource(file));
+    }
+
+    public static ResponseEntity<Object> export(File file) {
+        if (!file.exists()) {
+            return ResponseEntity.status(HttpStatus.NOT_FOUND).body("404 FILE NOT FOUND");
+        }
+
+        MediaType mediaType = MediaType.APPLICATION_OCTET_STREAM;
+
+        HttpHeaders headers = new HttpHeaders();
+        headers.add("Cache-Control", "no-cache, no-store, must-revalidate");
+        headers.setContentDispositionFormData("attachment", URLUtil.encode(file.getName()));
+
+        headers.add("Pragma", "no-cache");
+        headers.add("Expires", "0");
+        headers.add("Last-Modified", new Date().toString());
+        headers.add("ETag", String.valueOf(System.currentTimeMillis()));
+        return ResponseEntity
+                .ok()
+                .headers(headers)
+                .contentLength(file.length())
+                .contentType(mediaType)
+                .body(new FileSystemResource(file));
+    }
+}