小程序批量下载压缩包(zip文件)

# wxml

>

<view class="search_btn" catchtap="batchDownload">批量下载</view>

 

```js　　

//  批量下载

batchDownload(e){

    const {multipleCheckId,orderList}=this.data;

    const ids=multipleCheckId.map(item=>item.id)

    const Token = wx.getStorageSync("token");

    const first_token = wx.getStorageSync("first_token");

    const second_token = wx.getStorageSync("second_token");

    const that=this;

    if(!ids.length||ids.length>20){

    wx.showToast({

        title: ids.length>20?"选择的环境样本不能超过20个":"请选择可下载报告的环境样本",

        icon: "none",

        duration: 2000,

      });

      return;

    }

     wx.showLoading({

      title: "下载中",

    });

  

  if(ids.length===1){      // 单个下载   pdf文件

  wx.request({

    url: API_BASE_URL + `environment/samples/report`,

    method: "POST",

    header: {

      "Content-Type": "application/json",

      token: `${Token}`,

      "first-token": first_token,

      "second-token":second_token,

    },

    data: {ids:ids},

    responseType: "arraybuffer",

    success(res) {

      wx.hideLoading();

      var fileManager = wx.getFileSystemManager();

      var FilePath =

      wx.env.USER_DATA_PATH + "/" +"环境"+

      "-" +

      Math.floor(Math.random() * 1000) +

      "批量下载报告.pdf";

      fileManager.writeFile({

        data: res.data,

        filePath: FilePath,

        encoding: "binary",

        success(res) {

          // 编码格式

          wx.openDocument({

            //成功之后直接打开

            filePath: FilePath,

            showMenu: true,

            fileType: "pdf",

            success: (result) => {

              // 打开文档成功

              wx.hideLoading({

                success: (res) => {},

              });

              const newList = orderList.map(item=>{

                const newItem = {...item};

                if(newItem.checked==true){

                  newItem.checked=false;

                }

                return newItem

              })

              that.setData({orderList:newList,multipleCheckId:[]})

            },

            fail: (err) => {

              //   打开文档失败

              wx.hideLoading({

                success: (res) => {},

              });

            },

          });

        },

        fail: (res) => {

          wx.hideLoading({

            success: (res) => {},

          });

          wx.showToast({

            title: "下载失败!",

            icon: "none",

            duration: 2000, //停留时间

          });

        },

      });

    },

  });

}else{       // 批量下载压缩包文件

  const fileType=that.data.fileType

  const now = new Date();

    let year = now.getFullYear();

    let month =

    (now.getMonth() + 1) < 10 ? "0" + (now.getMonth() + 1) : now.getMonth() + 1;

    let day = now.getDate() < 10 ? "0" + now.getDate() : now.getDate();

    let hour = now.getHours()< 10 ? "0" + now.getHours() : now.getHours(); // 时

    let minutes = now.getMinutes()< 10 ? "0" + now.getMinutes() : now.getMinutes(); // 分

    let seconds = now.getSeconds()< 10 ? "0" + now.getSeconds() : now.getSeconds() //秒

    let today =`${year}${month}${day}${hour}${minutes}${seconds}`;

      wx.request({

        url: API_BASE_URL + `environment/samples/report`,

        method: "POST",

        header: {

          "Content-Type": "application/json",

          token: `${Token}`,

          "first-token": first_token,

          "second-token":second_token,

        },

        data: {ids:ids},

        responseType: "arraybuffer",

        success(res) {

          var fileManager = wx.getFileSystemManager();

          var FilePath =

          wx.env.USER_DATA_PATH + "/" +"环境"+

          "-" +"批量下载报告"+"-"+today+

          ".zip";

          fileManager.writeFile({

            data: res.data,

            filePath: FilePath,

            encoding: "binary",

            success(res) {

              wx.hideLoading();

              that.setData({

                FilePathUrl:FilePath

              })

              // that.uuzip(FilePath, fileType) // 解压

              // 编码格式

              wx.openDocument({

                //成功之后直接打开

                filePath: FilePath,

                showMenu: true,

                fileType: "zip",

                success: (result) => {

                  const newList = orderList.map(item=>{

                    const newItem = {...item};

                    if(newItem.checked==true){

                      newItem.checked=false;

                    }

                    return newItem

                  })

                  that.setData({orderList:newList,multipleCheckId:[]})

                  // 打开文档成功

                  wx.hideLoading({

                    success: (res) => {},

                  });

                },

                fail: (err) => {

                  //   打开文档失败

                  wx.hideLoading({

                    success: (res) => {},

                  });

                },

              });

            },

            fail: (res) => {

              wx.hideLoading({

                success: (res) => {},

              });

              wx.showToast({

                title: "导出失败!",

                icon: "none",

                duration: 2000, //停留时间

              });

            },

          });

        },

      });

    }

},