一、注册登录阿里云

1、阿里云登录 - 欢迎登录阿里云，安全稳定的云计算服务平台

2、开通OSS对象存储 并创建Bucket

创建完成后在Bucket列表可以查看到刚刚创建的Bucket

3、接下来创建子用户，鼠标放到主账号上面会弹出AccessKey管理

4、创建用户

在用户可以看见刚才的创建的用户信息并将生成的access-key、secret-key保存

5、需要实现的效果图展示

6、这里文件上传的功能我们采用后端签名后直传，流程如下

二、后端代码实现

1、添加相关maven依赖

<dependency>
    <groupId>com.alibaba.cloud</groupId>
    <artifactId>spring-cloud-starter-alicloud-oss</artifactId>
</dependency>
<dependencyManagement>
    <dependencies>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-dependencies</artifactId>
            <version>${spring-cloud.version}</version>
            <type>pom</type>
            <scope>import</scope>
        </dependency>
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-alibaba-dependencies</artifactId>
            <version>2.1.0.RELEASE</version>
            <type>pom</type>
            <scope>import</scope>
        </dependency>
    </dependencies>
</dependencyManagement>

2、将生成的access-key、secret-key等信息配置到application.yml

spring:
  cloud:
    alicloud:
      access-key: xxx
      secret-key: xxx
      oss:
        endpoint: xxx
        bucket: xxx

3、编写controller

@RestController
public class OssController {
    @Autowired
    OSS ossClient;
    @Value("${spring.cloud.alicloud.oss.endpoint}")
    String endpoint ;
    @Value("${spring.cloud.alicloud.oss.bucket}")
    String bucket ;
    @Value("${spring.cloud.alicloud.access-key}")
    String accessId ;
    @Value("${spring.cloud.alicloud.secret-key}")
    String accessKey ;

    @RequestMapping("/oss/policy")
    public R policy(){
        String host = "https://" + bucket + "." + endpoint; // host的格式为 bucketname.endpoint
        String format = new SimpleDateFormat("yyyy-MM-dd").format(new Date());
        String dir = format; // 用户上传文件时指定的前缀。
        Map<String, String> respMap=null;
        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 = ossClient.generatePostPolicy(expiration, policyConds);
            byte[] binaryData = postPolicy.getBytes("utf-8");
            String encodedPolicy = BinaryUtil.toBase64String(binaryData);
            String postSignature = ossClient.calculatePostSignature(postPolicy);
            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));
        } catch (Exception e) {
            // Assert.fail(e.getMessage());
            System.out.println(e.getMessage());
        } finally {
            ossClient.shutdown();
        }
        return R.ok().put("data",respMap);
    }
}

4、网关配置

routes:
        - id: third_party_route
          uri: lb://mall-third-party
          predicates:
            - Path=/api/third-party/**
          filters:
            - RewritePath=/api/third-party/(?<segment>.*),/$\{segment}

5、发送请求看是否可以拿到签名

三、编写前端代码

1、policy.js

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

2、singleUpload.vue单个文件上传

<template> 
  <div>
    <el-upload
      action="http://对应阿里云Bucket中的外网地址"
      :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>

3、上传引用

<template>
  <el-dialog
    :title="!dataForm.brandId ? '新增' : '修改'"
    :close-on-click-modal="false"
    :visible.sync="visible">
    <el-form :model="dataForm" :rules="dataRule" ref="dataForm"
             @keyup.enter.native="dataFormSubmit()" label-width="140px">
        <el-form-item label="品牌logo地址" prop="logo">
          <!-- <el-input v-model="dataForm.logo" placeholder="品牌logo地址"></el-input> -->
          <single-upload v-model="dataForm.logo"></single-upload>
        </el-form-item>
    </el-form>
  </el-dialog>
</template>

<script>
import SingleUpload from '@/components/upload/singleUpload.vue'
  export default {
  components: {SingleUpload},
    data () {
      return {
          visible: false,
          dataForm: {logo:''},
      }
    },
    dataFormSubmit () {
      this.$refs['dataForm'].validate((valid) => {
        if (valid) {
          this.$http({
            url: this.$http.adornUrl(`/product/brand/${!this.dataForm.brandId ? 'save' : 'update'}`),
              method: 'post',
              data: this.$http.adornData({
                'logo': this.dataForm.logo,
              })
            }).then(({data}) => {
              if (data && data.code === 0) {
                this.$message({
                  message: '操作成功',
                  type: 'success',
                  duration: 1500,
                  onClose: () => {
                    this.visible = false
                    this.$emit('refreshDataList')
                  }
                })
              } else {
                this.$message.error(data.msg)
              }
            })
          }
        })
      }

 最后的效果就如前面的截图所示，上传成功