描述

后端的实现相对简单，网上一大堆参考案例。前端主要是拿ImageUpload改造一下。

后端

后端的实现相对简单，网上一大堆参考案例

引入依赖

<dependency>
     <groupId>com.aliyun.oss</groupId>
     <artifactId>aliyun-sdk-oss</artifactId>
     <version>3.15.2</version>
 </dependency>

application.yml 添加访问oss需要的参数

#操作oss需要的一些参数
aliyun:
  accessKeyId: 你的accessKeyId       # 阿里云的accessKeyId
  secretAccessKey: 你的accessKey密码   # accessKey 密码
  oss:
    endPoint: 你的endpoint     # Endpoint:在阿里云oss控制台查看自己使用的endpoint
    bucketName: 你的bucketName   # bucket 名称

编写oss工具类

@Component
public class OssUtils {

    @Value("${aliyun.accessKeyId}")
    private String accessKeyId;

    @Value("${aliyun.secretAccessKey}")
    private String secretAccessKey;

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

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

    public String uploadOneFile(MultipartFile file) {

        // 创建OSSClient实例。
        OSS ossClient = new OSSClientBuilder().build(endPoint, accessKeyId, secretAccessKey);
        //设置文件名
        String fileName = new DateTime().toString("yyyy/MM/dd")
                + UUID.randomUUID().toString().replace("-", "")
                + file.getOriginalFilename();

        try {
            // 创建PutObject请求。
            ossClient.putObject(bucketName, fileName, file.getInputStream());

            String url = "http://" + bucketName + "." + endPoint + "/" + fileName;
            return url;
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        } finally {
            if (ossClient != null) {
                ossClient.shutdown();
            }
        }
    }

    public List<String> uploadArrayFile(MultipartFile[] files) {
        // 创建OSSClient实例。
        OSS ossClient = new OSSClientBuilder().build(endPoint, accessKeyId, secretAccessKey);
        List<String> list = new ArrayList<>();

        try {
            //设置文件名
            for (MultipartFile file : files) {
                String fileName = new DateTime().toString("yyyy/MM/dd")
                        + UUID.randomUUID().toString().replace("-", "")
                        + file.getOriginalFilename();
                // 创建PutObject请求。
                ossClient.putObject(bucketName, fileName, file.getInputStream());

                String url = "http://" + bucketName + "." + endPoint + "/" + fileName;
//                System.out.println(url);
                list.add(url);
            }

        } catch (Exception e) {
            e.printStackTrace();
            return null;
        } finally {
            if (ossClient != null) {
                ossClient.shutdown();
            }
        }
        return list;

    }

    public boolean deleteFile(String fileUrl) {

        // 创建OSSClient实例。
        OSS ossClient = new OSSClientBuilder().build(endPoint, accessKeyId, secretAccessKey);
        /** oss删除文件是根据文件完成路径删除的，但文件完整路径中不能包含Bucket名称。
         * 比如文件路径为：http://edu-czf.oss-cn-guangzhou.aliyuncs.com/2022/08/abc.jpg",
         * 则完整路径就是：2022/08/abc.jpg
         */
        int begin = ("http://" + bucketName + "." + endPoint + "/").length(); //找到文件路径的开始下标
        String deleteUrl = fileUrl.substring(begin);

        try {
            // 删除文件请求
            ossClient.deleteObject(bucketName, deleteUrl);
            return true;
        } catch (Exception e) {
            e.printStackTrace();
            return false;
        } finally {
            if (ossClient != null) {
                ossClient.shutdown();
            }
        }
    }

}

编写controller

@RestController
@Api(tags = "OSS对象存储Controller")
@RequestMapping("/oss")
public class OssController {
    @Autowired
    OssUtils ossUtils;

    @PostMapping("upload")
    public AjaxResult uploadFile(MultipartFile file) {
        //返回上传oss的url
        String url = ossUtils.uploadOneFile(file);
        AjaxResult ajax = AjaxResult.success();
        ajax.put("fileName", file.getOriginalFilename());
        ajax.put("url", url);
        return ajax;
    }

    @PostMapping("uploadArrayFile")
    public List<String> uploadArrayFile(MultipartFile[] files) {
        //返回上传oss的url
        return ossUtils.uploadArrayFile(files);
    }

    @PostMapping("deleteFile")
    public boolean deleteFile(@RequestBody String fileUrl) {
        //返回是否删除成功
        return ossUtils.deleteFile(fileUrl);
    }
}

前端

前端主要是拿ImageUpload改造一下，具体改造点如下：

更改调用接口

去掉baseUrl

回调成功后url改成真实url

main.js中挂在该组件

import OssImageUpload from "@/components/OssImageUpload"
Vue.component('OssImageUpload', OssImageUpload)

具体调用代码

<oss-image-upload v-model="form.logo" :limit="1" />

OssImageUpload具体代码

<template>
  <div class="component-upload-image">
    <el-upload
      multiple
      :action="uploadImgUrl"
      list-type="picture-card"
      :on-success="handleUploadSuccess"
      :before-upload="handleBeforeUpload"
      :limit="limit"
      :on-error="handleUploadError"
      :on-exceed="handleExceed"
      name="file"
      :on-remove="handleRemove"
      :show-file-list="true"
      :headers="headers"
      :file-list="fileList"
      :on-preview="handlePictureCardPreview"
      :class="{hide: this.fileList.length >= this.limit}"
    >
      <i class="el-icon-plus"></i>
    </el-upload>
    
    <!-- 上传提示 -->
    <div class="el-upload__tip" slot="tip" v-if="showTip">
      请上传
      <template v-if="fileSize"> 大小不超过 <b style="color: #f56c6c">{{ fileSize }}MB</b> </template>
      <template v-if="fileType"> 格式为 <b style="color: #f56c6c">{{ fileType.join("/") }}</b> </template>
      的文件
    </div>

    <el-dialog
      :visible.sync="dialogVisible"
      title="预览"
      width="800"
      append-to-body
    >
      <img
        :src="dialogImageUrl"
        style="display: block; max-width: 100%; margin: 0 auto"
      />
    </el-dialog>
  </div>
</template>

<script>
import { getToken } from "@/utils/auth";

export default {
  props: {
    value: [String, Object, Array],
    // 图片数量限制
    limit: {
      type: Number,
      default: 5,
    },
    // 大小限制(MB)
    fileSize: {
       type: Number,
      default: 5,
    },
    // 文件类型, 例如['png', 'jpg', 'jpeg']
    fileType: {
      type: Array,
      default: () => ["png", "jpg", "jpeg"],
    },
    // 是否显示提示
    isShowTip: {
      type: Boolean,
      default: true
    }
  },
  data() {
    return {
      number: 0,
      uploadList: [],
      dialogImageUrl: "",
      dialogVisible: false,
      hideUpload: false,
      baseUrl: process.env.VUE_APP_BASE_API,
      uploadImgUrl: process.env.VUE_APP_BASE_API + "/oss/upload", // 上传的图片服务器地址
      headers: {
        Authorization: "Bearer " + getToken(),
      },
      fileList: []
    };
  },
  watch: {
    value: {
      handler(val) {
        if (val) {
          // 首先将值转为数组
          const list = Array.isArray(val) ? val : this.value.split(',');
          // 然后将数组转为对象数组
          this.fileList = list.map(item => {
            if (typeof item === "string") {
              item = { name: item, url: item };
            }
            return item;
          });
        } else {
          this.fileList = [];
          return [];
        }
      },
      deep: true,
      immediate: true
    }
  },
  computed: {
    // 是否显示提示
    showTip() {
      return this.isShowTip && (this.fileType || this.fileSize);
    },
  },
  methods: {
    // 删除图片
    handleRemove(file, fileList) {
      const findex = this.fileList.map(f => f.name).indexOf(file.name);
      if(findex > -1) {
        this.fileList.splice(findex, 1);
        this.$emit("input", this.listToString(this.fileList));
      }
    },
    // 上传成功回调
    handleUploadSuccess(res) {
      this.uploadList.push({ name: res.fileName, url: res.url });
      if (this.uploadList.length === this.number) {
        this.fileList = this.fileList.concat(this.uploadList);
        this.uploadList = [];
        this.number = 0;
        this.$emit("input", this.listToString(this.fileList));
        this.$modal.closeLoading();
      }
    },
    // 上传前loading加载
    handleBeforeUpload(file) {
      let isImg = false;
      if (this.fileType.length) {
        let fileExtension = "";
        if (file.name.lastIndexOf(".") > -1) {
          fileExtension = file.name.slice(file.name.lastIndexOf(".") + 1);
        }
        isImg = this.fileType.some(type => {
          if (file.type.indexOf(type) > -1) return true;
          if (fileExtension && fileExtension.indexOf(type) > -1) return true;
          return false;
        });
      } else {
        isImg = file.type.indexOf("image") > -1;
      }

      if (!isImg) {
        this.$modal.msgError(`文件格式不正确, 请上传${this.fileType.join("/")}图片格式文件!`);
        return false;
      }
      if (this.fileSize) {
        const isLt = file.size / 1024 / 1024 < this.fileSize;
        if (!isLt) {
          this.$modal.msgError(`上传头像图片大小不能超过 ${this.fileSize} MB!`);
          return false;
        }
      }
      this.$modal.loading("正在上传图片，请稍候...");
      this.number++;
    },
    // 文件个数超出
    handleExceed() {
      this.$modal.msgError(`上传文件数量不能超过 ${this.limit} 个!`);
    },
    // 上传失败
    handleUploadError() {
      this.$modal.msgError("上传图片失败，请重试");
      this.$modal.closeLoading();
    },
    // 预览
    handlePictureCardPreview(file) {
      this.dialogImageUrl = file.url;
      this.dialogVisible = true;
    },
    // 对象转成指定字符串分隔
    listToString(list, separator) {
      let strs = "";
      separator = separator || ",";
      for (let i in list) {
        strs += list[i].url.replace(this.baseUrl, "") + separator;
      }
      return strs != '' ? strs.substr(0, strs.length - 1) : '';
    }
  }
};
</script>
<style scoped lang="scss">
// .el-upload--picture-card 控制加号部分
::v-deep.hide .el-upload--picture-card {
    display: none;
}
// 去掉动画效果
::v-deep .el-list-enter-active,
::v-deep .el-list-leave-active {
    transition: all 0s;
}

::v-deep .el-list-enter, .el-list-leave-active {
    opacity: 0;
    transform: translateY(0);
}
</style>