vue预览 打印 下载pdf文件

1.直接使用a标签（不知道下载时的文件名从哪里改）

var url = this.URL + '//data/print/' + this.id　　//调用后台的url，可以传参数
const a = document.createElement('a') //创建a标签
a.setAttribute('target','top')  //href链接
a.setAttribute('href',url)  //href链接
a.click() //自执行点击事件

2.window.open( this.URL + '//data-package/dataPackagePrint/'+id);（不知道下载时的文件名从哪里改）

3.使用pdfjs-dist（只有预览）

下载yarn add pdfjs-dist

<template>
  <div>
  <el-button
            class="grid-button"
            type="success"
            plain
            size="small"
            @click="lookFile"
            >预览</el-button
          >
     <div class="inform">
       <el-dialog title="人员名单" :visible.sync="dialogTableVisible" :modal="false">
          <pdf ref="pdf" v-for="i in numPages" :key="i" :src="src" :page="i"></pdf>
       </el-dialog>
    </div>
  </div>
</template>

<script>
//引入vue-pdf
import pdf from "vue-pdf";
import http from '@/util/http'

export default {
  data() {
    return {
       src: "",
       numPages: 1, // pdf 总页数
       dialogTableVisible: false,   //弹框是否显示
    };
  },
  components: {
   pdf
  },
  methods: {
 //下载pdf文件
    exportdata(){
        url
        .接口名({ 数据})
        .then((res) => {
        let blob = new Blob([res.data], {
              type: "application/pdf;charset-UTF-8"
            });
            let link = document.createElement("a");
            let fileName = "文件名"; //文件命和后缀
             link.style.display = 'none'
            link.href = window.URL.createObjectURL(blob);
            link.download = decodeURIComponent(fileName);
            link.click();
        })
        .catch((err) => {
          console.log(err, "失败");
        });
    },
  
    
    //预览
    lookFile() {
      this.dialogTableVisible = true
      http({
        url:'/statistical/aaa/',
        method:'get',
        responseType:'blob',
      }).then((res) => {
        console.log(res);
        this.src = this.getObjectURL(res.data);
     }).catch((err) => {
        console.log(err, "失败123");
      });
    },
     // 将返回的流数据转换为url
    getObjectURL(file) {
      let src = null;
      console.log(window.createObjectURL);
      if (window.createObjectURL) {
        // basic
        src = window.createObjectURL(file);
      } else if (window.webkitURL != undefined) {
        // webkit or chrome
        try {
          src = window.webkitURL.createObjectURL(file);
        } catch (error) {}
      } else if (window.URL != undefined) {
        // mozilla(firefox)
        try {
          src = window.URL.createObjectURL(file);
        } catch (error) {}
      }
      console.log(src, "我是src");
      this.getNumPages(src);
      return src;
    },
  //  # 计算pdf页码总数
    getNumPages(src) {
      let loadingTask = pdf.createLoadingTask(src);
    //   console.log(loadingTask, "我是计算页码");
      loadingTask.promise
        .then(pdf => {
          this.numPages = pdf.numPages;
          console.log(this.numPages);
        })
        .catch(err => {
          console.error("pdf 加载失败", err);
        });
    }
  },
};
</script>

<style lang="less" scoped>
/deep/.el-dialog{
         800px;
        height: 680px;
        max- 1500px;
        overflow: auto;
        border-radius: 10px;
        .el-table{
            height: 440px;
            font-size: 16px;
            font-family: Source Han Sans CN;
            text-align: center;
            max-height: 440px;
            overflow: auto;
        }
        .el-table::before{
            height: 0px;
        }
        .el-table .el-table__cell{
            padding: 7px 0;
        }
        .el-button{
            margin-top: 15px;
            float:right;
        }
    }
    /deep/.el-dialog__body{
        background-color: #E5F6F8;
        border: 1px solid #8E9394;
        border-top: 0px;
        height: 564px;
        // border-radius: 10px;
        border-bottom-right-radius: 10px;
        border-bottom-left-radius: 10px;
        // display: inline-block;
    }
    /deep/.el-dialog__header{
        background-color: #10A6B4;
        border: 1px solid #8E9394;
        border-bottom: 0px;
    }
    /deep/.el-dialog__title{
        font-size: 18px;
        font-family: Source Han Sans CN;
        font-weight: 400;
        color: #FFFFFF;
    }
    /deep/.el-dialog__headerbtn .el-dialog__close{
        color: #000000;
        font-size: 18px;
    }
</style>

4.（方式与3类似，但是打开的页面与1  2一样）

<template>
  <div class="pdfPriview">
      <iframe
        :src="pdfUrl"
        type="application/x-google-chrome-pdf"
        width="100%"
        frameborder="0"
        scrolling="auto"
        height="100%" />
  </div>
</template>

<script>
export default {
    data() {
        return {
            pdfUrl:this.URL + '//statistical/aaa/',
        }
    },
    created(){
        // '#toolbar=0'把控制台隐藏
        // this.pdfUrl = this.$route.query.pdfUrl
    },
}
</script>

<style lang="less">
    .pdfPriview{
        height: 100%;
        overflow: hidden;
    }
</style>

5.下载pdfjs(网盘有，文件名：pdfjs-2.14.305-legacy-dist.zip)

下载地址http://mozilla.github.io/pdf.js/getting_started/

在public中引入相关文件

<template>
  <div class="pdfPriview">
      
      <button @click="lookFile">预览</button>
  </div>
</template>

<script>
import http from '@/util/http'

export default {
    data() {
        return {
        }
    },
    methods: {
        lookFile() {
            let id = 2
            // window.open( this.URL + '//data-package/dataPackagePrint/'+id);
            http({
                url:'/data-package/dataPackagePrint/'+id,
                method:'get',
                responseType:'blob',
            }).then((res) => {
                var blob = new Blob([res.data], { type: 'application/pdf'})
                var href = window.URL.createObjectURL(blob); //创建下载的链接
                //window.open(`/pdfjs-2.14.305-legacy-dist/web/viewer.html?file=${encodeURIComponent(href)}`);
                window.open("/pdfjs-2.14.305-legacy-dist/web/viewer.html?file="+encodeURIComponent(href + "#" + "啊啊.pdf"));//更改下载时的文件名，如果不用更改文件名，file=后直接加url地址
            })
        },
    },
}
</script>

<style lang="less">
    .pdfPriview{
        height: 100%;
        overflow: hidden;
    }
</style>

如果想隐藏下载等按钮的话在view.html中设置style="display:none"

6.批量打印

后端整合PDF文件为一个  传给前台一个href连接

前台：

import printJS from 'print-js'