vue使用el-upload上传文件及Feign服务间传递文件的方法

一、前端代码

<el-upload class="step_content" drag
         action="string"
         ref="upload"
         :multiple="false"
         :http-request="createAppVersion"
         :data="appVersion"
         :auto-upload="false"
         :limit="1"
         :on-change="onFileUploadChange"
         :on-remove="onFileRemove">
    <i class="el-icon-upload"></i>
    <div class="el-upload__text">将文件拖到此处，或<em>点击上传</em></div>
</el-upload>
 <div class="mgt30">
    <el-button v-show="createAppVisible" :disabled="createAppDisable" type="primary" class="mgt30"
          @click="onSubmitClick">立即创建
    </el-button>
 </div>
....
 onSubmitClick() {
    this.$refs.upload.submit();
   },
   createAppVersion(param) {
    this.globalLoading = true;
    const formData = new FormData();
    formData.append('file', param.file);
    formData.append('appVersion', JSON.stringify(this.appVersion));
    addAppVersionApi(formData).then(res => {
     this.globalLoading = false;
     this.$message({message: '创建APP VERION 成功', type: 'success'});
     this.uploadFinish();
    }).catch(reason => {
     this.globalLoading = false;
     this.showDialog(reason);
    })
   },

说明：

el-upload 的 ref=”upload” 给这个组件起个变量名，以便 js逻辑代码可以引用
http-request=”createAppVersion” el-upload 上传使使用自定义的方法
:data=”appVersion” 上传时提交的表单数据
onSubmitClick 方法中会调用el-upload.submit()方法，进而调用createAppVersion（）方法
组成表单参数，取得上传的file 和 其它参数

const formData = new FormData();
formData.append('file', param.file);
formData.append('appVersion', JSON.stringify(this.appVersion));

6.addAppVersionApi 最终会调用下面的方法，其中formData就是param， 请求需要加header： ‘Content-Type’: ‘multipart/form-data’

 function httpPostMutipartFileAsyn(url, param) {
 return new Promise((resolve, reject) => {
  request({
   url: url,
   headers: {
    'Content-Type': 'multipart/form-data'
   },
   method: 'post',
   data: param
  }).then(response => {
   if (response.data.status.code === 0) {
    resolve(response.data)
   } else {
    reject(response.data.status)
   }
  }).catch(response => {
   reject(response)
  })
 })
}

二、后端代码

1.后端controller接口

								 
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