阿里云文件上传 返回文件路径

package com.mochain.epay.utils;

import com.aliyun.oss.OSSClient;
import com.aliyun.oss.model.ObjectMetadata;
import com.aliyun.oss.model.PutObjectResult;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Controller;
import org.springframework.util.StringUtils;
import org.springframework.web.multipart.MultipartFile;

import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.util.Date;
import java.util.Random;

/**
 * 阿里云 OSS工具类
 *
 * @author Monkey
 * @date 2017年9月30日下午3:38:09
 * @version 1.0
 */
@Controller
public class OSSClientUtil {

    public static final Logger logger = LoggerFactory.getLogger(OSSClientUtil.class);
    // endpoint
    private String endpoint = "##";
    // accessKey
    private String accessKeyId = "##";
    private String accessKeySecret = "##";
    // 空间
    private String bucketName = "##";
    // 文件存储目录
    private String filedir = "##";

    private OSSClient ossClient;

    public OSSClientUtil() {
        ossClient = new OSSClient(endpoint, accessKeyId, accessKeySecret);
    }

    public String uploadImg2Oss(MultipartFile file) {
        if (file.getSize() > 5 * 1024 * 1024) {
            System.out.println("上传图片大小不能超过10M！");
            return null;
        }
        String originalFilename = file.getOriginalFilename();
        String substring = originalFilename.substring(originalFilename.lastIndexOf(".")).toLowerCase();
        Random random = new Random();
        String name = random.nextInt(10000) + System.currentTimeMillis() + substring;
        try {
            InputStream inputStream = file.getInputStream();
            this.uploadFile2OSS(inputStream, name);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return name;
    }

    /**
     * 获得图片路径
     *
     * @param fileUrl
     * @return
     */
    public String getImgUrl(String fileUrl) {
        System.out.println(fileUrl);
        if (!StringUtils.isEmpty(fileUrl)) {
            String[] split = fileUrl.split("/");
            return this.getUrl(this.filedir + split[split.length - 1]);
        }
        return null;
    }

    /**
     * 上传到OSS服务器 如果同名文件会覆盖服务器上的
     *
     * @param instream
     *            文件流
     * @param fileName
     *            文件名称 包括后缀名
     * @return 出错返回"" ,唯一MD5数字签名
     */
    public String uploadFile2OSS(InputStream instream, String fileName) {
        String ret = "";
        try {
            // 创建上传Object的Metadata
            ObjectMetadata objectMetadata = new ObjectMetadata();
            objectMetadata.setContentLength(instream.available());
            objectMetadata.setCacheControl("no-cache");
            objectMetadata.setHeader("Pragma", "no-cache");
            objectMetadata.setContentType(getcontentType(fileName.substring(fileName.lastIndexOf("."))));
            objectMetadata.setContentDisposition("inline;filename=" + fileName);
            // 上传文件
            PutObjectResult putResult = ossClient.putObject(bucketName, filedir + fileName, instream, objectMetadata);
            ret = putResult.getETag();
        } catch (IOException e) {
            logger.error(e.getMessage(), e);
        } finally {
            try {
                if (instream != null) {
                    instream.close();
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        return ret;
    }

    /**
     * Description: 判断OSS服务文件上传时文件的contentType
     *
     * @param filenameExtension
     *            文件后缀
     * @return String
     */
    public static String getcontentType(String filenameExtension) {
        if (filenameExtension.equalsIgnoreCase("bmp")) {
            return "image/bmp";
        }
        if (filenameExtension.equalsIgnoreCase("gif")) {
            return "image/gif";
        }
        if (filenameExtension.equalsIgnoreCase("jpeg") || filenameExtension.equalsIgnoreCase("jpg")
                || filenameExtension.equalsIgnoreCase("png")) {
            return "image/jpeg";
        }
        if (filenameExtension.equalsIgnoreCase("html")) {
            return "text/html";
        }
        if (filenameExtension.equalsIgnoreCase("txt")) {
            return "text/plain";
        }
        if (filenameExtension.equalsIgnoreCase("vsd")) {
            return "application/vnd.visio";
        }
        if (filenameExtension.equalsIgnoreCase("pptx") || filenameExtension.equalsIgnoreCase("ppt")) {
            return "application/vnd.ms-powerpoint";
        }
        if (filenameExtension.equalsIgnoreCase("docx") || filenameExtension.equalsIgnoreCase("doc")) {
            return "application/msword";
        }
        if (filenameExtension.equalsIgnoreCase("xml")) {
            return "text/xml";
        }
        return "image/jpeg";
    }

    /**
     * 获得url链接
     *
     * @param key
     * @return
     */
    public String getUrl(String key) {
        // 设置URL过期时间为10年 3600l* 1000*24*365*10
        Date expiration = new Date(System.currentTimeMillis() + 3600L * 1000 * 24 * 365 * 10);
        // 生成URL
        URL url = ossClient.generatePresignedUrl(bucketName, key, expiration);
        if (url != null) {
            return url.toString();
        }
        return null;
    }
}

package com.mochain.epay.web;

import com.alibaba.fastjson.JSONObject;
import com.mochain.epay.utils.OSSClientUtil;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;

import java.util.HashMap;
import java.util.Map;


/**
 * 图片上传
 * @author Monkey
 * @date 2017年9月30日下午3:37:00
 * @version 1.0
 */
@RestController
@RequestMapping(value="file")
public class FileController {

    @RequestMapping(value = "/upload", method= RequestMethod.POST)
    @ResponseBody
    public String headImgUpload(MultipartFile file) {
        Map data = new HashMap<>();
        try {
            if (file == null || file.getSize() <= 0) {
                System.out.println("file不能为空");
            }
            OSSClientUtil ossClient=new OSSClientUtil();
            String name = ossClient.uploadImg2Oss(file);
            String imgUrl = ossClient.getImgUrl(name);
            String[] split = imgUrl.split("\\?");
            data.put("data", split);
            data.put("code", 0);
            data.put("msg", "图片上传成功");
        } catch (Exception e) {
            e.printStackTrace();
            data.put("code", 2000);
            data.put("msg", "图片上传成功");
        }
        return JSONObject.toJSONString(data);
    }
}

默认上传文件的大小最大为1Mb
添加配置文件：spring.servlet.multipart.max-file-size = 10Mb

image.png