vue中预览zip(完整版)

zip的数据流从后端接口获取为blob形式，使用插件jszip, 提取出zip中的目录并绑定到a-tree中。

同时根据压缩包中文件的类型来修改tree中的icon,并修改样式使显示更加清晰。

添加jszip插件：

yarn add jszip

(我一般都使用yarn添加，添加的时候很稳定快速，很少出问题)

由于我的项目中只是某个页面使用到该功能，所以使用局部引用：

在使用该功能的页面引入：

import JSZip from 'jszip'

页面设计，我使用了a-tree来展示，主要用到了treeData数据：

格式如下：

const treeData = [
   {
     title: "root",
     key: "",
     scopedSlots: { icon: "folder" },
     children: [
      {
        title: "folder1",
        key: "0-1",
        id:"0-1",
        parentId:"",
        scopedSlots: { icon: "folder" },
        children: [
          { title: "1.txt", key: "0-1-1", parentId:"0-1",scopedSlots: { icon: "txt" } },
          { title: "3.png", key: "0-1-2", parentId:"0-1",scopedSlots: { icon: "png" } },
          { title: "2.xml", key: "0-1-3", parentId:"0-1", scopedSlots: { icon: "xml" } },
        ],
      },
      {
        title: "folder2",
        key: "0-2",
        id:"0-2",
        parentId:"",
        scopedSlots: { icon: "folder" },
        children: [
          { title: "7.xlsx", key: "0-2-1", parentId:"0-2",scopedSlots: { icon: "childEdit" } },

        ],
      },
      {
        title: "6.pdf",
        key: "0-3",
        id:"0-3",
        parentId:"",
        scopedSlots: { icon: "pdf" },
      },
  ],
 },
];

a--tree的html如下：

<a-tree
                  showIcon
                  :default-expanded-keys="expandedKeys"
                  :expandedKeys="expandedKeys"
                  :selectedKeys="selectedKeys"
                  :treeData="treeData"
                  @expand="onExpand"
                  @select="onSelect"
                >
                <a-icon slot="folder" class="folder" type="folder" />
                <a-icon slot="image" class="image" type="file-image" />
                <a-icon slot="audio" class="audio" type="audio" />
                <a-icon slot="video" class="video" type="video-camera" />
                <a-icon slot="docx" class="docx" type="file-word" />
                <a-icon slot="xml" class="xml" type="file-excel" />
                <a-icon slot="pdf" class="pdf" type="file-pdf" />
                <a-icon slot="zip" class="zip" type="file-zip" />
                <a-icon slot="txt" class="txt" type="file-text" />
              </a-tree>

其中样式如下，可以自己任意修改：

#ziptree .anticon{
  font-size: 20px; color: #08c
}
#ziptree .anticon.folder{
   color: #e7c146
}
#ziptree .anticon.docx{
   color: #2a0ae2
}
#ziptree .anticon.pdf{
   color: #e90b1e
}
#ziptree .anticon.xml{
   color: #047449
}
#ziptree .anticon.zip{
   color: #435892
}
#ziptree .anticon.txt{
   color: #b9c6e7
}
#ziptree .anticon.image{
   color: #82c0a8
}

通过接口获取数据并处理数据：

downloadAttachmentStream(option).then((res)=>{
if (!res && res.status!=200 && res.data.type == "application/json") {
this.$message.error('找不到该文件')
return
}

                     let jszip = new JSZip()
                     jszip.loadAsync(res.data).then(zip=>{

                       let myData=[]
                       that.transformData(zip, myData,0,)
                       that.treeData=myData
                       that.$nextTick(()=>{
                         that.expandedKeys=['0']
                       })
                     })
                 });

其中transformData方法如下：

  transformData(obj, myData, level = 0) {
      let id=0
      if(Object.keys(obj.files).length==0){
        let fname=this.fileName.substring(0, this.fileName.lastIndexOf("."))
        let rootData={id:'0',parentId:'', key:'0',title:fname, fullName:fname+'/' ,type:'dir', children:[],slots:{ icon: "folder" }}
        myData.push(rootData)
      }else{
      for (let key in obj.files) {
        let array=key.split('/').filter(item => item != '')
        if(array.length == level+1){
          if (obj.files[key].dir) { 
            if(level==0){ // 根 只有一个
              let rootData={id:'0',parentId:'', key:'0',title:array[level], fullName:key ,type:'dir', children:[],slots:{ icon: "folder" }}
              myData.push(rootData)
              this.transformData(obj, rootData,level+1)
            }else{
              // 非根目录
              if(key.indexOf(myData.fullName)===0 && key!= myData.fullName && array.length == level+1){
              let newData={id:myData.id+'-'+id, key:myData.id+'-'+id,parentId:myData.id, title:array[level], type:'dir', children:[],fullName:key,slots:{ icon: "folder" }}
              myData.children.push(newData)
              id++
              this.transformData(obj, newData,level+1)
              }
            }
          }else{ // 文件
           if(key.indexOf(myData.fullName)==0 && key!=myData.fullName){
            let data= {id:myData.id+'-'+id,parentId:myData.id, key:myData.id+'-'+id,title:array[level], type:array[level].replace(/.+\./, ""),fullName:key,}
             if(['jpg','png','gif'].includes(data.type)){
              data.slots={icon: "image"}
             }else if(data.type=='mp3'){
               data.slots={icon: 'audio'}
             }else if(data.type=='mp4'){
               data.slots={icon: 'video'}
             } else if(data.type=='xlsx'){
               data.slots={icon: 'xml'}
             } else{
              data.slots={icon: data.type}
             }
             myData.children.push(data)
             id++
           }
          }
        }else{
          //
        }
      }
      } 
      return myData;
    },

经过以上步骤就能实现一个很漂亮的压缩包的目录树了。