005： vue中el-upload 组件添加token的方法

我会带着你远行 2024-03-16 15:36 8阅读 0赞

![在这里插入图片描述][32d2a1d099334cfba6adc4f84dd79e22.png_pic_center]

第005个

查看专栏目录: [按照VUE知识点][VUE] \------ [按照element UI知识点][element UI]

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**专栏目标**  
在vue和element UI联合技术栈的操控下，本专栏提供行之有效的源代码示例和信息点介绍，做到灵活运用。

> （1）提供vue2的一些基本操作：安装、引用，模板使用，computed，watch，生命周期(beforeCreate，created,beforeMount，mounted, beforeUpdate，updated, beforeDestroy，destroyed，activated，deactivated，errorCaptured，components，)、 $root , $parent , $children , $slots , $refs , props, $emit , eventbus ,provide / inject, Vue.observable, $listeners, $attrs, $nextTick , v-for, v-if, v-else,v-else-if，v-on，v-pre，v-cloak，v-once，v-model， v-html, v-text, keep-alive，slot-scope， filters, v-bind，.stop, .native, directives，mixin，render，国际化，Vue Router等  
> （2）提供element UI的经典操作：安装，引用，国际化，el-row，el-col，el-button，el-link，el-radio，el-checkbox ，el-input，el-select, el-cascader, el-input-number, el-switch,el-slider, el-time-picker, el-date-picker, el-upload, el-rate, el-color-picker, el-transfer, el-form, el-table, el-tree, el-pagination,el-badge,el-avatar,el-skeleton, el-empty, el-descriptions, el-result, el-statistic, el-alert, v-loading, $message, $alert, $prompt, $confirm , $notify, el-breadcrumb, el-page-header,el-tabs ,el-dropdown,el-steps,el-dialog, el-tooltip, el-popover, el-popconfirm, el-card, el-carousel, el-collapse, el-timeline, el-divider, el-calendar, el-image, el-backtop，v-infinite-scroll， el-drawer等

#### 本文章目录 ####

*   *  效果图
     *  template中片段
     *  data()和computed:\{\}中数据
     *  methods:\{\} 中核心方法数据

在使用el-upload的时候，上传文件到服务器，有时候后台要求上传token，怎么处理呢？以下是一个示例。

### 效果图 ###

![在这里插入图片描述][4cd869243ec740bb94eb0973f409fadf.png_pic_center]

### template中片段 ###

<el-dialog 
          :modal-append-to-body="false" 
          title="上传文件" 
          :visible.sync="isUpload" 
          width="390px" 
          :close-on-click-modal="false" 
          ref="upload" 
      > 
    <el-upload 
                      class="upload-demo" 
                       accept=".jar" 
                      drag 
                      :action="uploadUrl" 
                      :file-list="fileList" 
                      :headers="headerToken" 
                      :on-success="onSuccess" 
                      :before-upload="beforeUpload"   
    > 
    <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> 
    <div class="el-upload__tip" slot="tip">只能上传jar文件，且不超过30Mb</div> 
    </el-upload> 
     
          <span slot="footer"> 
              <el-button type="warning" @click="cancelUpload()">取消上传</el-button> 
          </span> 
      </el-dialog>

### data()和computed:\{\}中数据 ###

data(){
         
        return {
         
    isUpload：false,
                uploadUrl:this.$api.firmwareUpload, 
        } 
    }, 
    computed: {
         
        
        headerToken(){
         
            return {
           "authorize":localStorage.getItem('token')  }  } 
    },

### methods:\{\} 中核心方法数据 ###

/*   ** 名称：上传文件*/ 
               beforeUpload(file) {
                          
                    var testmsg=file.name.substring(file.name.lastIndexOf('.')+1)                 
                    const fileType1 = testmsg === 'jar'  
                    const isLt30M = file.size / 1024 / 1024 < 30 
                    if(!fileType1) {
          
                        this.$message({
          
                            message: '上传文件只能是 jar格式!',  
                            type: 'warning'  
                        });  
                    }  
                    if(!isLt30M) {
          
                        this.$message({
          
                            message: '上传文件大小不能超过 30MB!',  
                            type: 'warning'  
                        });  
                    }  
                    return fileType1  && isLt30M  
                } , 
     
            onSuccess(file, fileList){
         
                this.$message({
         
                                type: 'success', 
                                message: '上传成功！' 
                            }); 
                this.isUpload=false; 
            },

[32d2a1d099334cfba6adc4f84dd79e22.png_pic_center]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/16/bbfcd906869243768d3c7ce8183de0ad.png
[VUE]: https://blog.csdn.net/cuclife/article/details/131138955
[element UI]: https://blog.csdn.net/cuclife/article/details/131140113
[echarts_openlayers_cesium_leaflet_mapbox_d3_canvas _]: https://bbs.csdn.net/forums/giser
[4cd869243ec740bb94eb0973f409fadf.png_pic_center]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/16/db089ef291af46cd97c8337e065b11ca.png