方式一：保存到特定文件
@Value("${oss.accessKeyId}")
private String accessKeyId;
@Value("${oss.accessKeySecret}")
private String accessKeySecret;
@Value("${oss.bucketName}")
private String bucketName;
@Value("${oss.endpoint}")
private String endpoint;
/**
* 下载 OSS 文件，保存到特定路径
*/
@RequestMapping("/downloadOSSFile")
public void downloadOSSFile(){
// Endpoint以华东1（杭州）为例，其它Region请按实际情况填写。
// String endpoint = "https://oss-cn-hangzhou.aliyuncs.com";
// // 阿里云账号AccessKey拥有所有API的访问权限，风险很高。强烈建议您创建并使用RAM用户进行API访问或日常运维，请登录RAM控制台创建RAM用户。
// String accessKeyId = accessKeyId;
// String accessKeySecret = "yourAccessKeySecret";
// // 填写Bucket名称，例如examplebucket。
// String bucketName = "examplebucket";
// // 填写不包含Bucket名称在内的Object完整路径，例如testfolder/exampleobject.txt。
String objectName = "debugging/onlineDebuggingTemplate.docx";
String pathName = "/Users/changyou/Desktop/test/线上联调申请（模板）.docx";
// 创建OSSClient实例。
OSS ossClient = new OSSClientBuilder().build(endpoint, accessKeyId, accessKeySecret);
try {
// 下载Object到本地文件，并保存到指定的本地路径中。如果指定的本地文件存在会覆盖，不存在则新建。
// 如果未指定本地路径，则下载后的文件默认保存到示例程序所属项目对应本地路径中。
ossClient.getObject(new GetObjectRequest(bucketName, objectName), new File(pathName));
} catch (OSSException oe) {
System.out.println("Caught an OSSException, which means your request made it to OSS, "
+ "but was rejected with an error response for some reason.");
System.out.println("Error Message:" + oe.getErrorMessage());
System.out.println("Error Code:" + oe.getErrorCode());
System.out.println("Request ID:" + oe.getRequestId());
System.out.println("Host ID:" + oe.getHostId());
} catch (ClientException ce) {
System.out.println("Caught an ClientException, which means the client encountered "
+ "a serious internal problem while trying to communicate with OSS, "
+ "such as not being able to access the network.");
System.out.println("Error Message:" + ce.getMessage());
} finally {
if (ossClient != null) {
ossClient.shutdown();
}
}
}
/**
* 如果只是将oss文件响应给前端浏览器，可以使用下面的案例
* @param response
*/
@RequestMapping("/downloadOSSFileForFrontEnd")
public void downloadOSSFileForFrontEnd(HttpServletResponse response) {
BufferedInputStream input = null;
OutputStream outputStream = null;
// 填写不包含Bucket名称在内的Object完整路径，例如testfolder/exampleobject.txt。
String objectName = "onlineDebugging/onlineDebuggingTemplate.docx";
String outputFileName = "onlineDebuggingTemplate.docx";
// 创建OSSClient实例。
OSS ossClient = new OSSClientBuilder().build(endpoint, accessKeyId, accessKeySecret);
OSSObject ossObject = ossClient.getObject(bucketName, objectName);
try {
response.reset();
response.setCharacterEncoding("utf-8");
response.setContentType("application/x-msdownload");
response.addHeader("Content-Disposition",
"attachment;filename=" + new String(outputFileName.getBytes("gb2312"), "ISO8859-1"));
input = new BufferedInputStream(ossObject.getObjectContent());
byte[] buffBytes = new byte[1024];
outputStream = response.getOutputStream();
int read = 0;
while ((read = input.read(buffBytes)) != -1) {
outputStream.write(buffBytes, 0, read);
}
outputStream.flush();
// 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。
ossObject.close();
} catch (IOException ex) {
ex.printStackTrace();
} finally {
try {
if (outputStream != null) {
outputStream.close();
}
if (input != null) {
input.close();
}
} catch (IOException e) {
e.printStackTrace();
}
}
ossClient.shutdown();
}
方式二：只是将oss文件响应给前端浏览器
/**
* 如果只是将oss文件响应给前端浏览器，可以使用下面的案例
* @param response
*/
@RequestMapping("/downloadOSSFileForFrontEnd")
public void downloadOSSFileForFrontEnd(HttpServletResponse response) {
BufferedInputStream input = null;
OutputStream outputStream = null;
// 填写不包含Bucket名称在内的Object完整路径，例如testfolder/exampleobject.txt。
String objectName = "onlineDebugging/onlineDebuggingTemplate.docx";
String outputFileName = "onlineDebuggingTemplate.docx";
// 创建OSSClient实例。
OSS ossClient = new OSSClientBuilder().build(endpoint, accessKeyId, accessKeySecret);
OSSObject ossObject = ossClient.getObject(bucketName, objectName);
try {
response.reset();
response.setCharacterEncoding("utf-8");
response.setContentType("application/x-msdownload");
response.addHeader("Content-Disposition",
"attachment;filename=" + new String(outputFileName.getBytes("gb2312"), "ISO8859-1"));
input = new BufferedInputStream(ossObject.getObjectContent());
byte[] buffBytes = new byte[1024];
outputStream = response.getOutputStream();
int read = 0;
while ((read = input.read(buffBytes)) != -1) {
outputStream.write(buffBytes, 0, read);
}
outputStream.flush();
// 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。
ossObject.close();
} catch (IOException ex) {
ex.printStackTrace();
} finally {
try {
if (outputStream != null) {
outputStream.close();
}
if (input != null) {
input.close();
}
} catch (IOException e) {
e.printStackTrace();
}
}
ossClient.shutdown();
}
参考：
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