SpringCloud整合阿里云OSS，实现后端上传 或 分布式版后端生成签名vuejs前端上传模式 或 postman测试签名前端上传

目录

• 云存储开通与使用
• 实战一、后端上传
• 实战二、1. OSS获取服务端签名
• 实战二、1. 前后联调测试上传
• 不用Vuejs，利用postman测试前端携带签名上传
• 代码gitee地址

云存储开通与使用

两种文件存储位置模式

登录阿里云网站，推荐使用支付宝登录方式（不用再实名认证）

开通对象存储服务：

进入管理控制台

点击oss新手入门查看文档


必须了解如下资源术语

创建一个Bucket：

测试手动上传文件

在线访问图片：复制该URL地址浏览器访问即可，图片会下载到本地打开

分析分布式微服务上传访问图片形式：

实战一、后端上传

返回目录

首先在之前进入的API文档里查看java版SDK文件上传详情

第一步安装（引入Maven依赖包，java8版本，更高java版本引入下面的更多依赖）

<dependency>
    <groupId>com.aliyun.ossgroupId>
    <artifactId>aliyun-sdk-ossartifactId>
    <version>3.10.2version>
dependency>

创建一个测试的SpringBoot项目，并引入刚刚的依赖包

查看上传文件文档

找到上传文件流的代码，复制测试

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.InputStream;

public class Demo {

    public static void main(String[] args) throws Exception {
        // 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 = "yourAccessKeyId";
        String accessKeySecret = "yourAccessKeySecret";
        // 填写Bucket名称，例如examplebucket。
        String bucketName = "examplebucket";
        // 填写Object完整路径，完整路径中不能包含Bucket名称，例如exampledir/exampleobject.txt。
        String objectName = "exampledir/exampleobject.txt";
        // 填写本地文件的完整路径，例如D:\\localpath\\examplefile.txt。
        // 如果未指定本地路径，则默认从示例程序所属项目对应本地路径中上传文件流。
        String filePath= "D:\\localpath\\examplefile.txt";

        // 创建OSSClient实例。
        OSS ossClient = new OSSClientBuilder().build(endpoint, accessKeyId, accessKeySecret);

        try {
            InputStream inputStream = new FileInputStream(filePath);            
            // 创建PutObject请求。
            ossClient.putObject(bucketName, objectName, inputStream);
        } 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();
            }
        }
    }
}                    

复制方法体，在测试代码中进行测试

复制自己存储空间的地域节点：


配置阿里云的accessKeyId和accessKeySecret（这里需要我们创建一个子账号用于管理上传）

点击新建我们的子用户账号



勾选同意Open Api调用访问，以便我们外部接口访问

创建成功后就能看到AccessKey ID和AccessKey Secret了，写在测试代码程序中

给用户赋予管理对象存储服务OSS权限

再写自己的Bucket名称

本地选择一个图片文件测试上传，点击图片文件查看属性


运行测试效果：

查看：


成功完成

注意：这里只是测试原理，如果要配合前端，前端就要写上传文件的组件，然后后端动态接收文件。

SpringCloud Alibaba为我们提供了上传的API starter

Maven依赖：

 		<dependency>
            <groupId>com.alibaba.cloudgroupId>
            <artifactId>spring-cloud-starter-alicloud-ossartifactId>
        dependency>

要把SpringCloud的版本控制加上：

<dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>com.alibaba.cloudgroupId>
                <artifactId>spring-cloud-alibaba-dependenciesartifactId>
                <version>2.1.0.RELEASEversion>
                <type>pomtype>
                <scope>importscope>
            dependency>
        dependencies>
    dependencyManagement>

在配置文件yml中配置信息

 	@Resource
    OSSClient ossClient;

    @Test
    public void test2(){
        String bucketName = "gulimall-charm";
        // 填写Object完整路径，完整路径中不能包含Bucket名称，例如exampledir/exampleobject.txt。
        String objectName = "test3.png";
        // 填写本地文件的完整路径，例如D:\\localpath\\examplefile.txt。
        // 如果未指定本地路径，则默认从示例程序所属项目对应本地路径中上传文件流。
        String filePath= "C:\\Users\\86198\\Pictures\\Camera Roll\\HH8V}7FK~S9339X5IS0]ZWU.png";
        try {
            InputStream inputStream = new FileInputStream(filePath);
            // 创建PutObject请求。
            ossClient.putObject(bucketName, objectName, inputStream);
        } 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 | FileNotFoundException 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();
            }
        }
    }

测试结果一样成功

实战二、1. OSS获取服务端签名

返回目录

应用服务器不再担当上传中间件，只负责生成可以让阿里云检测的签名

查看API文档：

找到以下代码：


粘贴在这里：

package com.aliyun.oss.appservermaven;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.URI;
import java.security.KeyFactory;
import java.security.PublicKey;
import java.security.spec.X509EncodedKeySpec;
import java.sql.Date;
import java.util.LinkedHashMap;
import java.util.Map;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.http.HttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;

import com.aliyun.oss.OSSClient;
import com.aliyun.oss.common.utils.BinaryUtil;
import com.aliyun.oss.model.MatchMode;
import com.aliyun.oss.model.PolicyConditions;

//import org.junit.Assert;
import net.sf.json.JSONObject;

@SuppressWarnings("deprecation")
@WebServlet(asyncSupported = true)
public class CallbackServer extends HttpServlet {
    /**
     *
     */
    private static final long serialVersionUID = 5522372203700422672L;

    /**
     * Get请求
     */
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {

        // 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 accessId = "yourAccessKeyId";
        String accessKey = "yourAccessKeySecret";
        // Endpoint以华东1（杭州）为例，其它Region请按实际情况填写。
        String endpoint = "oss-cn-hangzhou.aliyuncs.com";
        // 填写Bucket名称，例如examplebucket。
        String bucket = "examplebucket";
        // 填写Host地址，格式为https://bucketname.endpoint。
        String host = "https://examplebucket.oss-cn-hangzhou.aliyuncs.com";
        // 设置上传回调URL，即回调服务器地址，用于处理应用服务器与OSS之间的通信。OSS会在文件上传完成后，把文件上传信息通过此回调URL发送给应用服务器。
        String callbackUrl = "https://192.168.0.0:8888";
        // 设置上传到OSS文件的前缀，可置空此项。置空后，文件将上传至Bucket的根目录下。
        String dir = "exampledir/";

        OSSClient client = new OSSClient(endpoint, accessId, accessKey);
        try {
            long expireTime = 30;
            long expireEndTime = System.currentTimeMillis() + expireTime * 1000;
            Date expiration = new Date(expireEndTime);
            PolicyConditions policyConds = new PolicyConditions();
            policyConds.addConditionItem(PolicyConditions.COND_CONTENT_LENGTH_RANGE, 0, 1048576000);
            policyConds.addConditionItem(MatchMode.StartWith, PolicyConditions.COND_KEY, dir);

            String postPolicy = client.generatePostPolicy(expiration, policyConds);
            byte[] binaryData = postPolicy.getBytes("utf-8");
            String encodedPolicy = BinaryUtil.toBase64String(binaryData);
            String postSignature = client.calculatePostSignature(postPolicy);

            Map<String, String> respMap = new LinkedHashMap<String, String>();
            respMap.put("accessid", accessId);
            respMap.put("policy", encodedPolicy);
            respMap.put("signature", postSignature);
            respMap.put("dir", dir);
            respMap.put("host", host);
            respMap.put("expire", String.valueOf(expireEndTime / 1000));
            // respMap.put("expire", formatISO8601Date(expiration));

            JSONObject jasonCallback = new JSONObject();
            jasonCallback.put("callbackUrl", callbackUrl);
            jasonCallback.put("callbackBody",
                    "filename=${object}&size=${size}&mimeType=${mimeType}&height=${imageInfo.height}&width=${imageInfo.width}");
            jasonCallback.put("callbackBodyType", "application/x-www-form-urlencoded");
            String base64CallbackBody = BinaryUtil.toBase64String(jasonCallback.toString().getBytes());
            respMap.put("callback", base64CallbackBody);

            JSONObject ja1 = JSONObject.fromObject(respMap);
            // System.out.println(ja1.toString());
            response.setHeader("Access-Control-Allow-Origin", "*");
            response.setHeader("Access-Control-Allow-Methods", "GET, POST");
            response(request, response, ja1.toString());

        } catch (Exception e) {
            // Assert.fail(e.getMessage());
            System.out.println(e.getMessage());
        }
    }

    /**
     * 获取public key
     *
     * @param url
     * @return
     */
    @SuppressWarnings({ "finally" })
    public String executeGet(String url) {
        BufferedReader in = null;

        String content = null;
        try {
            // 定义HttpClient。
            @SuppressWarnings("resource")
            DefaultHttpClient client = new DefaultHttpClient();
            // 实例化HTTP方法。
            HttpGet request = new HttpGet();
            request.setURI(new URI(url));
            HttpResponse response = client.execute(request);

            in = new BufferedReader(new InputStreamReader(response.getEntity().getContent()));
            StringBuffer sb = new StringBuffer("");
            String line = "";
            String NL = System.getProperty("line.separator");
            while ((line = in.readLine()) != null) {
                sb.append(line + NL);
            }
            in.close();
            content = sb.toString();
        } catch (Exception e) {
        } finally {
            if (in != null) {
                try {
                    in.close();// 关闭BufferedReader。
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
            return content;
        }
    }

    /**
     * 获取Post消息体
     *
     * @param is
     * @param contentLen
     * @return
     */
    public String GetPostBody(InputStream is, int contentLen) {
        if (contentLen > 0) {
            int readLen = 0;
            int readLengthThisTime = 0;
            byte[] message = new byte[contentLen];
            try {
                while (readLen != contentLen) {
                    readLengthThisTime = is.read(message, readLen, contentLen - readLen);
                    if (readLengthThisTime == -1) {// Should not happen.
                        break;
                    }
                    readLen += readLengthThisTime;
                }
                return new String(message);
            } catch (IOException e) {
            }
        }
        return "";
    }

    /**
     * 验证上传回调的Request
     *
     * @param request
     * @param ossCallbackBody
     * @return
     * @throws NumberFormatException
     * @throws IOException
     */
    protected boolean VerifyOSSCallbackRequest(HttpServletRequest request, String ossCallbackBody)
            throws NumberFormatException, IOException {
        boolean ret = false;
        String autorizationInput = new String(request.getHeader("Authorization"));
        String pubKeyInput = request.getHeader("x-oss-pub-key-url");
        byte[] authorization = BinaryUtil.fromBase64String(autorizationInput);
        byte[] pubKey = BinaryUtil.fromBase64String(pubKeyInput);
        String pubKeyAddr = new String(pubKey);
        if (!pubKeyAddr.startsWith("http://gosspublic.alicdn.com/")
                && !pubKeyAddr.startsWith("https://gosspublic.alicdn.com/")) {
            System.out.println("pub key addr must be oss addrss");
            return false;
        }
        String retString = executeGet(pubKeyAddr);
        retString = retString.replace("-----BEGIN PUBLIC KEY-----", "");
        retString = retString.replace("-----END PUBLIC KEY-----", "");
        String queryString = request.getQueryString();
        String uri = request.getRequestURI();
        String decodeUri = java.net.URLDecoder.decode(uri, "UTF-8");
        String authStr = decodeUri;
        if (queryString != null && !queryString.equals("")) {
            authStr += "?" + queryString;
        }
        authStr += "\n" + ossCallbackBody;
        ret = doCheck(authStr, authorization, retString);
        return ret;
    }

    /**
     * Post请求
     */
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        String ossCallbackBody = GetPostBody(request.getInputStream(),
                Integer.parseInt(request.getHeader("content-length")));
        boolean ret = VerifyOSSCallbackRequest(request, ossCallbackBody);
        System.out.println("verify result : " + ret);
        // System.out.println("OSS Callback Body:" + ossCallbackBody);
        if (ret) {
            response(request, response, "{\"Status\":\"OK\"}", HttpServletResponse.SC_OK);
        } else {
            response(request, response, "{\"Status\":\"verdify not ok\"}", HttpServletResponse.SC_BAD_REQUEST);
        }
    }

    /**
     * 验证RSA
     *
     * @param content
     * @param sign
     * @param publicKey
     * @return
     */
    public static boolean doCheck(String content, byte[] sign, String publicKey) {
        try {
            KeyFactory keyFactory = KeyFactory.getInstance("RSA");
            byte[] encodedKey = BinaryUtil.fromBase64String(publicKey);
            PublicKey pubKey = keyFactory.generatePublic(new X509EncodedKeySpec(encodedKey));
            java.security.Signature signature = java.security.Signature.getInstance("MD5withRSA");
            signature.initVerify(pubKey);
            signature.update(content.getBytes());
            boolean bverify = signature.verify(sign);
            return bverify;

        } catch (Exception e) {
            e.printStackTrace();
        }

        return false;
    }

    /**
     * 服务器响应结果
     *
     * @param request
     * @param response
     * @param results
     * @param status
     * @throws IOException
     */
    private void response(HttpServletRequest request, HttpServletResponse response, String results, int status)
            throws IOException {
        String callbackFunName = request.getParameter("callback");
        response.addHeader("Content-Length", String.valueOf(results.length()));
        if (callbackFunName == null || callbackFunName.equalsIgnoreCase(""))
            response.getWriter().println(results);
        else
            response.getWriter().println(callbackFunName + "( " + results + " )");
        response.setStatus(status);
        response.flushBuffer();
    }

    /**
     * 服务器响应结果
     */
    private void response(HttpServletRequest request, HttpServletResponse response, String results) throws IOException {
        String callbackFunName = request.getParameter("callback");
        if (callbackFunName == null || callbackFunName.equalsIgnoreCase(""))
            response.getWriter().println(results);
        else
            response.getWriter().println(callbackFunName + "( " + results + " )");
        response.setStatus(HttpServletResponse.SC_OK);
        response.flushBuffer();
    }
}           

我们这次只做上传，所以用不了这么多方法，只需要doGet里的方法体

/**
     * Get请求
     */
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {

        // 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 accessId = "yourAccessKeyId";
        String accessKey = "yourAccessKeySecret";
        // Endpoint以华东1（杭州）为例，其它Region请按实际情况填写。
        String endpoint = "oss-cn-hangzhou.aliyuncs.com";
        // 填写Bucket名称，例如examplebucket。
        String bucket = "examplebucket";
        // 填写Host地址，格式为https://bucketname.endpoint。
        String host = "https://examplebucket.oss-cn-hangzhou.aliyuncs.com";
        // 设置上传回调URL，即回调服务器地址，用于处理应用服务器与OSS之间的通信。OSS会在文件上传完成后，把文件上传信息通过此回调URL发送给应用服务器。
        String callbackUrl = "https://192.168.0.0:8888";
        // 设置上传到OSS文件的前缀，可置空此项。置空后，文件将上传至Bucket的根目录下。
        String dir = "exampledir/";

        OSSClient client = new OSSClient(endpoint, accessId, accessKey);
        try {
            long expireTime = 30;
            long expireEndTime = System.currentTimeMillis() + expireTime * 1000;
            Date expiration = new Date(expireEndTime);
            PolicyConditions policyConds = new PolicyConditions();
            policyConds.addConditionItem(PolicyConditions.COND_CONTENT_LENGTH_RANGE, 0, 1048576000);
            policyConds.addConditionItem(MatchMode.StartWith, PolicyConditions.COND_KEY, dir);

            String postPolicy = client.generatePostPolicy(expiration, policyConds);
            byte[] binaryData = postPolicy.getBytes("utf-8");
            String encodedPolicy = BinaryUtil.toBase64String(binaryData);
            String postSignature = client.calculatePostSignature(postPolicy);

            Map<String, String> respMap = new LinkedHashMap<String, String>();
            respMap.put("accessid", accessId);
            respMap.put("policy", encodedPolicy);
            respMap.put("signature", postSignature);
            respMap.put("dir", dir);
            respMap.put("host", host);
            respMap.put("expire", String.valueOf(expireEndTime / 1000));
            // respMap.put("expire", formatISO8601Date(expiration));

            JSONObject jasonCallback = new JSONObject();
            jasonCallback.put("callbackUrl", callbackUrl);
            jasonCallback.put("callbackBody",
                    "filename=${object}&size=${size}&mimeType=${mimeType}&height=${imageInfo.height}&width=${imageInfo.width}");
            jasonCallback.put("callbackBodyType", "application/x-www-form-urlencoded");
            String base64CallbackBody = BinaryUtil.toBase64String(jasonCallback.toString().getBytes());
            respMap.put("callback", base64CallbackBody);

            JSONObject ja1 = JSONObject.fromObject(respMap);
            // System.out.println(ja1.toString());
            response.setHeader("Access-Control-Allow-Origin", "*");
            response.setHeader("Access-Control-Allow-Methods", "GET, POST");
            response(request, response, ja1.toString());

        } catch (Exception e) {
            // Assert.fail(e.getMessage());
            System.out.println(e.getMessage());
        }
    }

最终简化版获取签名代码（前端访问跨域需自己解决）

import com.aliyun.oss.OSSClient;
import com.aliyun.oss.common.utils.BinaryUtil;
import com.aliyun.oss.model.MatchMode;
import com.aliyun.oss.model.PolicyConditions;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;


import javax.annotation.Resource;
import java.nio.charset.StandardCharsets;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.LinkedHashMap;
import java.util.Map;

@RestController
public class test {

    @Resource
    OSS ossClient;

    @Value("${spring.cloud.alicloud.oss.endpoint}")
    String endpoint;

    @Value("${spring.cloud.alicloud.access-key}")
    String accessId;
    /**
     * Get请求
     */
    @GetMapping("test")
    protected  Map<String, String> doGet() {
        // 填写Bucket名称，例如examplebucket。
        String bucket = "gulimall-charm";
        // 填写Host地址，格式为https://bucketname.endpoint。
        //举例
        //https://gulimall-charm.oss-cn-chengdu.aliyuncs.com/test3.png
        String host = "https://"+bucket+"."+endpoint;
        // 设置上传回调URL，即回调服务器地址，用于处理应用服务器与OSS之间的通信。OSS会在文件上传完成后，把文件上传信息通过此回调URL发送给应用服务器。
        //String callbackUrl = "https://192.168.0.0:8888";
        // 设置上传到OSS文件的前缀，可置空此项。置空后，文件将上传至Bucket的根目录下。
        String format = new SimpleDateFormat("yyyy-MM-dd").format(new Date());
        String dir = format+"/";

        Map<String, String> respMap= new LinkedHashMap<>();
        try {
            long expireTime = 30;
            long expireEndTime = System.currentTimeMillis() + expireTime * 1000;
            Date expiration = new Date(expireEndTime);
            PolicyConditions policyConds = new PolicyConditions();
            policyConds.addConditionItem(PolicyConditions.COND_CONTENT_LENGTH_RANGE, 0, 1048576000);
            policyConds.addConditionItem(MatchMode.StartWith, PolicyConditions.COND_KEY, dir);

            String postPolicy = client.generatePostPolicy(expiration, policyConds);
            byte[] binaryData = postPolicy.getBytes(StandardCharsets.UTF_8);
            String encodedPolicy = BinaryUtil.toBase64String(binaryData);
            String postSignature = client.calculatePostSignature(postPolicy);

            respMap.put("accessid", accessId);
            respMap.put("policy", encodedPolicy);
            respMap.put("signature", postSignature);
            respMap.put("dir", dir);
            respMap.put("host", host);
            respMap.put("expire", String.valueOf(expireEndTime / 1000));

        } catch (Exception e) {
            System.out.println(e.getMessage());
        }
        return respMap;
    }
}

利用浏览器或者postman发送请求获取签名数据

上面就是我们请求后获取到的签名数据

前端上传的Vuejs代码：(如果不会Vuejs，直接略过，看后面postman获取签名上传示例)

谷粒商城那个vuejs代码太多了，不适合学习阅读（开发时可以复制，理解原理则不用），我自己结合官网以及它的代码逻辑利用postman测试，一样的原理，在最后展示

httpRequest.js

import Vue from 'vue'
import axios from 'axios'
import router from '@/router'
import qs from 'qs'
import merge from 'lodash/merge'
import { clearLoginInfo } from '@/utils'

const http = axios.create({
  timeout: 1000 * 30,
  withCredentials: true,
  headers: {
    'Content-Type': 'application/json; charset=utf-8'
  }
})

/**
 * 请求拦截
 */
http.interceptors.request.use(config => {
  config.headers['token'] = Vue.cookie.get('token') // 请求头带上token
  return config
}, error => {
  return Promise.reject(error)
})

/**
 * 响应拦截
 */
http.interceptors.response.use(response => {
  if (response.data && response.data.code === 401) { // 401, token失效
    clearLoginInfo()
    router.push({ name: 'login' })
  }
  return response
}, error => {
  return Promise.reject(error)
})

/**
 * 请求地址处理
 * @param {*} actionName action方法名称
 */
http.adornUrl = (actionName) => {
  // 非生产环境 && 开启代理, 接口前缀统一使用[/proxyApi/]前缀做代理拦截!
  return (process.env.NODE_ENV !== 'production' && process.env.OPEN_PROXY ? '/proxyApi/' : window.SITE_CONFIG.baseUrl) + actionName
}

/**
 * get请求参数处理
 * @param {*} params 参数对象
 * @param {*} openDefultParams 是否开启默认参数?
 */
http.adornParams = (params = {}, openDefultParams = true) => {
  var defaults = {
    't': new Date().getTime()
  }
  return openDefultParams ? merge(defaults, params) : params
}

/**
 * post请求数据处理
 * @param {*} data 数据对象
 * @param {*} openDefultdata 是否开启默认数据?
 * @param {*} contentType 数据格式
 *  json: 'application/json; charset=utf-8'
 *  form: 'application/x-www-form-urlencoded; charset=utf-8'
 */
http.adornData = (data = {}, openDefultdata = true, contentType = 'json') => {
  var defaults = {
    't': new Date().getTime()
  }
  data = openDefultdata ? merge(defaults, data) : data
  return contentType === 'json' ? JSON.stringify(data) : qs.stringify(data)
}

export default http

policy.js

import http from '@/utils/httpRequest.js'
export function policy() {
   return  new Promise((resolve,reject)=>{
        http({
            url: http.adornUrl("/thirdparty/oss/policy"),
            method: "get",
            params: http.adornParams({})
        }).then(({ data }) => {
            resolve(data);
        })
    });
}

singleUpload.vue

<template> 
  <div>
    <el-upload
      action="http://gulimall-yaoxinjia.oss-cn-shenzhen.aliyuncs.com"
      :data="dataObj"
      list-type="picture"
      :multiple="false" :show-file-list="showFileList"
      :file-list="fileList"
      :before-upload="beforeUpload"
      :on-remove="handleRemove"
      :on-success="handleUploadSuccess"
      :on-preview="handlePreview">
      <el-button size="small" type="primary">点击上传</el-button>
      <div slot="tip" class="el-upload__tip">只能上传jpg/png文件，且不超过10MB</div>
    </el-upload>
    <el-dialog :visible.sync="dialogVisible">
      <img width="100%" :src="fileList[0].url" alt="">
    </el-dialog>
  </div>
</template>
<script>
   import {policy} from './policy'
   import { getUUID } from '@/utils'

  export default {
    name: 'singleUpload',
    props: {
      value: String
    },
    computed: {
      imageUrl() {
        return this.value;
      },
      imageName() {
        if (this.value != null && this.value !== '') {
          return this.value.substr(this.value.lastIndexOf("/") + 1);
        } else {
          return null;
        }
      },
      fileList() {
        return [{
          name: this.imageName,
          url: this.imageUrl
        }]
      },
      showFileList: {
        get: function () {
          return this.value !== null && this.value !== ''&& this.value!==undefined;
        },
        set: function (newValue) {
        }
      }
    },
    data() {
      return {
        dataObj: {
          policy: '',
          signature: '',
          key: '',
          ossaccessKeyId: '',
          dir: '',
          host: '',
          // callback:'',
        },
        dialogVisible: false
      };
    },
    methods: {
      emitInput(val) {
        this.$emit('input', val)
      },
      handleRemove(file, fileList) {
        this.emitInput('');
      },
      handlePreview(file) {
        this.dialogVisible = true;
      },
      beforeUpload(file) {
        let _self = this;
        return new Promise((resolve, reject) => {
          policy().then(response => {
            _self.dataObj.policy = response.data.policy;
            _self.dataObj.signature = response.data.signature;
            _self.dataObj.ossaccessKeyId = response.data.accessid;
            _self.dataObj.key = response.data.dir +getUUID()+'_${filename}';
            _self.dataObj.dir = response.data.dir;
            _self.dataObj.host = response.data.host;
            resolve(true)
          }).catch(err => {
            reject(false)
          })
        })
      },
      handleUploadSuccess(res, file) {
        console.log("上传成功...")
        this.showFileList = true;
        this.fileList.pop();
        this.fileList.push({name: file.name, url: this.dataObj.host + '/' + this.dataObj.key.replace("${filename}",file.name) });
        this.emitInput(this.fileList[0].url);
      }
    }
  }
</script>
<style>

</style>

不用Vuejs，利用postman测试前端携带签名上传

返回目录

首先访问我们自己刚刚写的后台服务器的获取签名的地址得到如下信息

在postman的Body的form-data填写如下数据，
首先看文档要求需要携带的数据：

按照格式填写如下：注意policy和signature有过期时间，如果得到策略过期错误，请重新发送请求获取签名

post请求点击Send完成上传：

我们到oss那里查看上传结果：成功！！！

代码gitee地址

返回目录

注意: 密钥，仓库已经删除，请换成自己的

https://gitee.com/liu-daixin/oss-test-code.git