【SpringBoot】-- 实现当地文件/图片上传到服务器天生url所在
在java项目中你大概会有以下需求：用户上传当地图片，然后展示在网页上。本篇文章将使用阿里云oss实现上传图片到oss，oss天生url。一、预备工作
首先进入阿里云，按如下操纵
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https://img-blog.csdnimg.cn/direct/21ed8c0d646841e7a011087f11a14c9c.png
https://img-blog.csdnimg.cn/direct/bf99d2a619e549a896d323731497c913.png
进入创建页面，修改读写权限为公共读
https://img-blog.csdnimg.cn/direct/10d13bb756ab4e38b6feac9095db51c3.png
然后进入bucket，创建AccessKey
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创建后，保存好AccessKeyID和AccessKey Secret
二、代码
将以下依靠添加到项目的pom.xml文件中
<dependency>
<groupId>com.aliyun.oss</groupId>
<artifactId>aliyun-sdk-oss</artifactId>
<version>3.15.1</version>
</dependency>
<dependency>
<groupId>javax.xml.bind</groupId>
<artifactId>jaxb-api</artifactId>
<version>2.3.1</version>
</dependency>
<dependency>
<groupId>javax.activation</groupId>
<artifactId>activation</artifactId>
<version>1.1.1</version>
</dependency>
<!-- no more than 2.3.3-->
<dependency>
<groupId>org.glassfish.jaxb</groupId>
<artifactId>jaxb-runtime</artifactId>
<version>2.3.3</version>
</dependency> 创建一个工具类，用于设置aliyunoss
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添加以下代码：（留意修改）
import com.aliyun.oss.ClientException;
import com.aliyun.oss.OSS;
import com.aliyun.oss.OSSClientBuilder;
import com.aliyun.oss.OSSException;
import com.aliyun.oss.model.PutObjectRequest;
import com.aliyun.oss.model.PutObjectResult;
import java.io.FileInputStream;
import java.io.InputStream;
public class AliOssUtil {
// Endpoint以华东1（杭州）为例，其它Region请按实际情况填写。
private static final String ENPOINT = "地区";
// 从环境变量中获取访问凭证。运行本代码示例之前，请确保已设置环境变量OSS_ACCESS_KEY_ID和OSS_ACCESS_KEY_SECRET。
// EnvironmentVariableCredentialsProvider credentialsProvider = CredentialsProviderFactory.newEnvironmentVariableCredentialsProvider();
private static final String ACCESS_KEY_ID="你的ID";
private static final String ACCESS_KEY_SECRT="KEY";
// 填写Bucket名称，例如examplebucket。
private static final String BUCKETNAME = "你的bucket名称";
public static String uploadFile(String objectName, InputStream in) throws Exception {
// 创建OSSClient实例。
OSS ossClient = new OSSClientBuilder().build(ENPOINT,ACCESS_KEY_ID,ACCESS_KEY_SECRT);
String url = "";
try {
// 填写字符串。
String content = "Hello OSS，你好世界";
// 创建PutObjectRequest对象。
PutObjectRequest putObjectRequest = new PutObjectRequest(BUCKETNAME, objectName,in);
// 如果需要上传时设置存储类型和访问权限，请参考以下示例代码。
// ObjectMetadata metadata = new ObjectMetadata();
// metadata.setHeader(OSSHeaders.OSS_STORAGE_CLASS, StorageClass.Standard.toString());
// metadata.setObjectAcl(CannedAccessControlList.Private);
// putObjectRequest.setMetadata(metadata);
// 上传字符串。
PutObjectResult result = ossClient.putObject(putObjectRequest);
//url组成:http://bucket名称.区域节点
url = "https://" + BUCKETNAME + "." + ENPOINT.substring(ENPOINT.lastIndexOf("/")+1)+"/"+objectName;
} 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();
}
}
return url;
}
} 然后在控制类中使用
@RestController
public class FileUploadController {
@PostMapping("/upload")
public Result<String> upload(MultipartFile file) throws Exception {
String originalFilename = file.getOriginalFilename();
//保证文件名字唯一，防止文件覆盖
String filename = UUID.randomUUID().toString()+originalFilename.substring(originalFilename.lastIndexOf("."));
String url = AliOssUtil.uploadFile(filename,file.getInputStream());
return Result.success(url);
}
} 三、测试接口
这里使用apifox进行测试
https://img-blog.csdnimg.cn/direct/38ecf7fe018b4d4ab8477cb3624e8c13.png
发送哀求后，可以看到图片已经存储到oss上，并且返回了所在。
https://img-blog.csdnimg.cn/direct/260934d054124ffdab20c56f8e6fc2b3.png
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