java实现阿里云上传图片，并解决上传图片文件的强制性下载

实现步骤:
    1、导入依赖
    2、配置文件（application.properties）
    3、配置OssConfig
    4、书写Service(interface)
    2、书写Service(实现类)
    3、书写Controller

1、导入依赖

<dependency>
        <groupId>com.aliyun.oss</groupId>
        <artifactId>aliyun-sdk-oss</artifactId>
        <version>3.8.0</version>
</dependency>

2、配置文件（application.properties）

# 阿里云云存储 OSS
oss.endpoint=oss-cn-shenzhen.aliyuncs.com
oss.domain=https://demo-project.com/
oss.bucket=demo-project
oss.accessId=***IQ3**rz***fx**
oss.accessKey=***y28hrO***B9eB0******
oss.default.dir=static/upload/

3、配置OssConfig

package com.mine.luotj.config.oss;

import com.aliyun.oss.ClientConfiguration;
import com.aliyun.oss.OSSClient;
import com.aliyun.oss.common.auth.CredentialsProvider;
import com.aliyun.oss.common.auth.DefaultCredentialProvider;
import lombok.Data;
import org.apache.logging.log4j.util.Strings;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
import org.springframework.context.annotation.Bean;
import org.springframework.stereotype.Component;

/**
 * @author: create by luotj
 * date: 2020-03-30 14:10
 **/
@Data
@Component
@ConditionalOnProperty({"oss.endpoint", "oss.domain", "oss.bucket", "oss.accessId", "oss.accessKey", "oss.default.dir"})
public class OssConfig{

    @Value("${oss.endpoint}")
    private String endpoint;

    @Value("${oss.domain}")
    private String domain;

    @Value("${oss.bucket}")
    private String bucket;

    @Value("${oss.accessId}")
    private String accessId;

    @Value("${oss.accessKey}")
    private String accessKey;

    @Value("${oss.default.dir}")
    private String dir;

    @Bean
    public CredentialsProvider provideCredentialsProvider() {
        if (!Strings.isBlank(this.accessId) && !Strings.isBlank(this.accessKey)) {
            return new DefaultCredentialProvider(this.accessId, this.accessKey);
        } else {
            throw new IllegalArgumentException("oss.accessId 或 oss.accessKey properties 不能为空");
        }
    }

    @Bean
    public ClientConfiguration provideClientConfiguration() {
        return new ClientConfiguration();
    }

    @Bean(
            destroyMethod = "shutdown"
    )
    public OSSClient provideOSSClient(@Autowired CredentialsProvider credentialsProvider, @Autowired ClientConfiguration clientConfiguration) {
        return new OSSClient(this.endpoint, credentialsProvider, clientConfiguration);
    }
}

4、书写Service(interface)

package com.mine.luotj.Service.oss;

import org.springframework.web.multipart.MultipartFile;

/**
 * @author: create by luotj
 * date: 2020-03-30 12:43
 **/
public interface OssService {

    String uploadPicture(MultipartFile multipartFile);

}

5、书写Service(实现类)

package com.mine.luotj.Service.oss;

import com.aliyun.oss.OSSClient;
import com.aliyun.oss.model.ObjectMetadata;
import com.mine.luotj.config.oss.OssConfig;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.web.multipart.MultipartFile;

import java.io.InputStream;
import java.security.SecureRandom;
import java.text.SimpleDateFormat;
import java.util.Date;

/**
 * @author: create by luotj
 * date: 2020-03-30 12:43
 **/
@Slf4j
@Service
public class OssServiceImpl implements OssService {

    @Autowired
    private OssConfig ossConfig;

    @Autowired
    private OSSClient mOssClient;

    @Override
    public String uploadPicture(MultipartFile multipartFile) {
        try {
            /* 文件名 */
            String fileName = multipartFile.getOriginalFilename();
            /* 后缀名 */
            String prefix = fileName.substring(fileName.lastIndexOf("."));

            /* 获取文件流 */
            InputStream inputStream = multipartFile.getInputStream();

            SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMdd");
            String finalFileName = System.currentTimeMillis() + "" + new SecureRandom().nextInt(0x0400) + prefix;

            //此处设置Content-type = image/jpg(解决上传图片访问链接强制性下载的情况,不设置则访问的路径打开效果是下载)
            ObjectMetadata objectMetadata = new ObjectMetadata();
            objectMetadata.setContentType("image/jpg");

            String objectName = sdf.format(new Date()) + "/" + finalFileName;

            mOssClient.putObject(ossConfig.getBucket(), ossConfig.getDir() + objectName, inputStream, objectMetadata);
            String accessUrl = ossConfig.getDomain().endsWith("/")
                    ? ossConfig.getDomain() + ossConfig.getDir() + objectName
                    : ossConfig.getDomain() + ossConfig.getDir() + "/" + objectName;
            return accessUrl;
        } catch (Exception ex) {
            log.error("msg:{}", ex.getMessage());
        }
        return null;
    }
}

6、书写Controller

package com.mine.luotj.ui.controller.api.oss;

import com.mine.luotj.Service.oss.OssService;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestPart;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;

/**
 * 阿里云上传
 *
 * @author: create by luotj
 * date: 2020-03-30 12:27
 **/
@Api(tags = "05. 阿里云上传")
@RestController
@RequestMapping("/api/oss")
public class OssController {



    @Autowired
    private OssService ossService;

    @ApiOperation("图片上传(返回路径)")
    @PostMapping("/upload")
    public String uploadPicture(@RequestPart(value = "file") MultipartFile multipartFile) {
        return ossService.uploadPicture(multipartFile);
    }

}

上传效果：

 

java解决文件oss上传强制性下载友情链接：
https://blog.csdn.net/oRanXiaoLuo/article/details/103364928
https://segmentfault.com/q/1010000015459762?sort=created