网站制作需要学什么下拉词排名
实际工作中，需要用阿里云对象存储保存图片，并且在上传图片到阿里云对象存储服务器后，获取图片在阿里云对象存储服务器的URL地址，以便给 WEB 前端显示。
阿里云对象存储上传图片的工具类
package zhangchao;import com.aliyun.oss.ClientException;
import com.aliyun.oss.OSS;
import com.aliyun.oss.OSSClientBuilder;
import com.aliyun.oss.OSSException;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.net.URL;
import java.util.Date;
import java.util.UUID;/*** 阿里云对象存储工具类*/
public class OSSUtils {// OSS阿里云对象存储的AK和SKprivate static final String OSS_AK = "yourAK";private static final String OSS_SK = "yourSK";// OSS阿里云对象存储的Bucket名称private static final String OSS_BUCKET_NAME = "your-files";// Endpoint以华东1（杭州）为例，其它Region请按实际情况填写。private static final String OSS_ENDPOINT = "https://oss-cn-hangzhou.aliyuncs.com";/*** 上传图片并返回图片URL* @return 图片URL*/public static String uploadImage(String imageFilePath) {String result = null;// 创建OSSClient实例。OSS ossClient = new OSSClientBuilder().build(OSS_ENDPOINT, OSS_AK, OSS_SK);FileInputStream fis = null;try {// 创建存储空间。fis = new FileInputStream(imageFilePath);String uuid = UUID.randomUUID().toString().replaceAll("-", "");ossClient.putObject(OSS_BUCKET_NAME, uuid, fis);// 设置URL过期时间为10年 3600l * 1000 * 24 * 365 * 10Date expiration = new Date(System.currentTimeMillis() + 3600L * 1000L *24L * 365L * 10L);URL url = ossClient.generatePresignedUrl(OSS_BUCKET_NAME, uuid, expiration);if (url != null) {result = url.toString();}} catch (OSSException oe) {StringBuilder sb = new StringBuilder();sb.append("Caught an OSSException, which means your request made it to OSS, ").append("but was rejected with an error response for some reason.");sb.append("Error Message:").append(oe.getErrorMessage());sb.append("Error Code:").append(oe.getErrorCode());sb.append("Request ID:").append(oe.getRequestId());sb.append("Host ID:").append(oe.getHostId());System.out.println(sb.toString());} catch (ClientException ce) {StringBuilder sb = new StringBuilder();sb.append("Caught an ClientException, which means the client encountered ").append("a serious internal problem while trying to communicate with OSS, ").append("such as not being able to access the network.");sb.append("Error Message:" + ce.getMessage());System.out.println(sb.toString());ce.printStackTrace();} catch (FileNotFoundException e) {e.printStackTrace();} finally {try {if (null != fis) {fis.close();}} catch (IOException e) {e.printStackTrace();}if (ossClient != null) {ossClient.shutdown();}}return result;}
}调用的 main 方法：
package zhangchao;public class Main {public static void main(String[] args) {String imgUrl = OSSUtils.uploadImage("E:\\ws\\zc\\Java8OSSImg\\src\\main\\resources\\q1.jpg");System.out.println(imgUrl);}
}
运行结果，这里显示了返回的图片 URL 地址：
https://your-files.oss-cn-hangzhou.aliyuncs.com/abc123?Expires=2021599742&OSSAccessKeyId=youAK&Signature=xxxxxx
这个地址没办法用浏览器直接看，需要写个HTML来测试一下。
<!DOCTYPE html>
<html lang="en">
<head><meta charset="UTF-8"><title>Title</title>
</head>
<body><img src="https://your-files.oss-cn-hangzhou.aliyuncs.com/abc123?Expires=2021599742&OSSAccessKeyId=youAK&Signature=xxxxxx">
</body>
</html>