From a1724279470ee5b869c7dd94cb01e37e3a6479f3 Mon Sep 17 00:00:00 2001
From: xuhy <3313886187@qq.com>
Date: 星期三, 22 一月 2025 15:36:55 +0800
Subject: [PATCH] 文件下载
---
ruoyi-admin/src/main/java/com/ruoyi/web/controller/tool/TencentCosUtil.java | 55 ++++++++++++++++++++++++++++++++++++++++++++++++++++++-
1 files changed, 54 insertions(+), 1 deletions(-)
diff --git a/ruoyi-admin/src/main/java/com/ruoyi/web/controller/tool/TencentCosUtil.java b/ruoyi-admin/src/main/java/com/ruoyi/web/controller/tool/TencentCosUtil.java
index a492575..be2bdbb 100644
--- a/ruoyi-admin/src/main/java/com/ruoyi/web/controller/tool/TencentCosUtil.java
+++ b/ruoyi-admin/src/main/java/com/ruoyi/web/controller/tool/TencentCosUtil.java
@@ -4,15 +4,26 @@
import com.qcloud.cos.ClientConfig;
import com.qcloud.cos.auth.BasicCOSCredentials;
import com.qcloud.cos.auth.COSCredentials;
+import com.qcloud.cos.exception.CosClientException;
+import com.qcloud.cos.exception.CosServiceException;
import com.qcloud.cos.http.HttpProtocol;
+import com.qcloud.cos.model.COSObject;
+import com.qcloud.cos.model.GetObjectRequest;
import com.qcloud.cos.model.ObjectMetadata;
import com.qcloud.cos.model.PutObjectResult;
import com.qcloud.cos.region.Region;
+import com.qcloud.cos.utils.IOUtils;
+import com.ruoyi.common.utils.WebUtils;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Component;
import org.springframework.web.multipart.MultipartFile;
+import javax.servlet.ServletOutputStream;
+import javax.servlet.http.HttpServletResponse;
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
import java.io.InputStream;
+import java.io.OutputStream;
import java.util.UUID;
/**
@@ -46,6 +57,11 @@
*/
@Value("${cos.client.bucket}")
private String bucketName;
+ /**
+ * 文件存放位置
+ */
+ @Value("${cos.client.location}")
+ private String location;
/**
* 1.调用静态方法getCosClient()就会获得COSClient实例
@@ -82,7 +98,7 @@
//使用UUID工具 创建唯一名称，放置文件重名被覆盖，在拼接上上命令获取的文件类型
String fileName = UUID.randomUUID() + fileType;
// 指定文件上传到 COS 上的路径，即对象键。最终文件会传到存储桶名字中的images文件夹下的fileName名字
- String key = "xizang/" + fileName;
+ String key = location+"/" + fileName;
// 创建上传Object的Metadata
ObjectMetadata objectMetadata = new ObjectMetadata();
// - 使用输入流存储，需要设置请求长度
@@ -105,4 +121,41 @@
}
}
+ /**
+ * 下载文件
+ * @param file
+ * @return
+ */
+ public void downLoadFile(String file) {
+ HttpServletResponse response = WebUtils.response();
+ String replace = file.replace(rootSrc, "");
+ COSCredentials cred = new BasicCOSCredentials(
+ secretId,
+ secretKey);
+ // 2.1 设置存储桶的地域（上文获得）
+ Region region = new Region(bucketAddr);
+ ClientConfig clientConfig = new ClientConfig(region);
+ // 2.2 使用https协议传输
+ clientConfig.setHttpProtocol(HttpProtocol.https);
+ COSClient cosClient = new COSClient(cred, clientConfig);
+ try {
+ // 5. 下载文件并获取输入流
+ InputStream inputStream = cosClient.getObject(bucketName, replace).getObjectContent();
+ ServletOutputStream outputStream = response.getOutputStream();
+ // 6. 处理输入流，例如读取内容或保存到本地文件
+ // 这里仅作示例，实际应用中需要根据需求处理输入流
+ byte[] buffer = new byte[1024];
+ int len;
+ while ((len = inputStream.read(buffer)) != -1) {
+ // 处理读取到的数据
+ outputStream.write(buffer, 0, len);
+ }
+ } catch (Exception e) {
+ e.printStackTrace();
+ } finally {
+ // 7. 关闭输入流
+ cosClient.shutdown();
+ }
+ }
+// https://xzgttest-1305134071.cos.ap-chengdu.myqcloud.com/xizang/e4ea88b8-5470-456e-bf97-75cf47f38e84.jpg
}
\ No newline at end of file
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