feat: 本地下载功能

增加本地文件下载功能

adc-da-report/src/main/java/com/adc/da/report/controller/ReportManageConroller.java

@@ -361,7 +361,7 @@ public class ReportManageConroller {
             }else if ("alioss".equals(uploadType)){
                 ossClientUtil.downloadFileFromOSS(entity.getSavePath(),response);
             }else if ("local".equals(uploadType)){
-                //do nothing
+                localFileUtil.downFile(entity.getSavePath(), response);
             }
 
         } catch (Exception ex) {

adc-da-report/src/main/java/com/adc/da/report/util/LocalFileUtil.java

@@ -1,10 +1,15 @@
 package com.adc.da.report.util;
 
+import com.adc.da.util.exception.AdcDaBaseException;
+import com.obs.services.exception.ObsException;
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.beans.factory.annotation.Value;
 import org.springframework.stereotype.Component;
 
+import javax.servlet.http.HttpServletResponse;
 import java.io.*;
+import java.nio.file.Files;
+import java.nio.file.Paths;
 
 /**
  * @author Caihaohan
@@ -56,4 +61,26 @@ public class LocalFileUtil {
         inputStream.close();
         outputStream.close();
     }
+
+    public void downFile(String savePath, HttpServletResponse response) throws IOException {
+        String filePath = uploadFile + savePath;
+
+        //复制到本地
+        FileOutputStream fileOutputStream = new FileOutputStream(filePath);
+        getFileFromLocal(savePath, fileOutputStream);
+
+        //将文件写到response中
+        try (InputStream objectContent = Files.newInputStream(Paths.get(filePath))) {
+            byte[] bt = new byte[1024 * 1024];
+            int len = 0;
+            while ((len = objectContent.read(bt)) != -1) {
+                response.getOutputStream().write(bt, 0, len);
+            }
+        } catch (ObsException | IOException oe) {
+            throw new AdcDaBaseException("获取本地文件失败");
+        } finally {
+            // 数据读取完成后，获取的流必须关闭，否则会造成连接泄漏，导致请求无连接可用，程序无法正常工作。
+            response.getOutputStream().close();
+        }
+    }
 }