vue中实现打印

一、VUE 集成 LODOP插件打印

VUE 集成LODOP插件打印

Lodop、C-Lodop使用说明及样例

C-Lodop插件官网：功能演示 - Lodop和C-Lodop官网主站

参考文章：VUE 集成 LODOP插件打印_廷贺的博客-CSDN博客

二、winodw.print() 打印

print()

方法用于打印当前窗口的内容。调用

print()

方法会产生一个打印预览弹框，让用户可以设置打印请求。最简单的打印就是直接调用window.print()，当然用

document.querySelector('print')

也可以达到同样的效果。默认打印页面中body里的所有内容。

// 打印
var global_Html = "";
function printme() {
    global_Html = document.body.innerHTML;
    document.body.innerHTML = document.getElementById('primary').innerHTML;　　　　　　　　　　　
    window.print();
    window.setTimeout(function() {
        document.body.innerHTML = global_Html;
    }, 500);
}

1.简单使用

参考文章连接1：vue、js 打印 window.print（）方法_gu_eu的博客-CSDN博客_js afterprint

参考文章连接2：window.print()局部打印三种方式 - 硅谷工具人 - 博客园

参考文章连接3：vue，打印案例 window.print() 的完美实现_kaiking_g的博客-CSDN博客_// 打印类属性、方法定义 /* eslint-disable */

2.本人创建组件模板使用案例

2.1 创建 print.js 文件

// 打印类属性、方法定义
/* eslint-disable */
const Print = function (dom, options) {
    options = options || {}
    if (!(this instanceof Print)) return new Print(dom, options);
    this.conf = {
        isAllStyle:false, // 是否加载当前页面所有样式
        styleStr:'',    // 设置样式字符串
        setDomHeightArr: [], // 需要动态获取并设置高度的 元素
        echartDomArr: [], // echart dom
        printBeforeFn: null, // 打印前回调
        printDoneCallBack: null // 打印后回调
    }
    for (const key in this.conf) {
        if (key && options.hasOwnProperty(key)) {
            this.conf[key] = options[key]
        }
    }
    // debugger
    if ((typeof dom) === "string") {
        this.dom = document.querySelector(dom);
    } else {
        this.dom = this.isDOM(dom) ? dom : dom.$el;
    }
    if (this.conf.setDomHeightArr && this.conf.setDomHeightArr.length) {
        this.setDomHeight(this.conf.setDomHeightArr);
    }
    this.init();
};

Print.prototype = {
    /**
     * 初始化
     */
    init: function () {
        var content = this.getStyle() + this.getHtml();
        this.writeIframe(content);
    },
    /**
     * 配置属性扩展
     * @param {Object} obj
     * @param {Object} obj2
     */
    extendOptions: function (obj, obj2) {
        for (var k in obj2) {
            obj[k] = obj2[k];
        }
        return obj;
    },
    /**
     复制原网页所有的样式
     */
    getStyle: function () {
        var str = ""
        if(this.conf.isAllStyle){
            let styles = document.querySelectorAll('style,link');
            for (var i = 0; i < styles.length; i++) {
                str += styles[i].outerHTML;
            }
        }
        str += `<style>.no-print{display:none;}${this.conf.styleStr}</style>`;
        return str;
    },
    // 表单赋值
    getHtml: function () {
        var inputs = document.querySelectorAll('input');
        var textareas = document.querySelectorAll('textarea');
        var selects = document.querySelectorAll('select');
        // debugger
        for (var k = 0; k < inputs.length; k++) {
            if (inputs[k].type == "checkbox" || inputs[k].type == "radio") {
                if (inputs[k].checked == true) {
                    inputs[k].setAttribute('checked', "checked")
                } else {
                    inputs[k].removeAttribute('checked')
                }
            } else if (inputs[k].type == "text") {
                inputs[k].setAttribute('value', inputs[k].value)
            } else {
                inputs[k].setAttribute('value', inputs[k].value)
            }
        }

        for (var k2 = 0; k2 < textareas.length; k2++) {
            if (textareas[k2].type == 'textarea') {
                textareas[k2].innerHTML = textareas[k2].value
            }
        }

        for (var k3 = 0; k3 < selects.length; k3++) {
            if (selects[k3].type == 'select-one') {
                var child = selects[k3].children;
                for (var i in child) {
                    if (child[i].tagName == 'OPTION') {
                        if (child[i].selected == true) {
                            child[i].setAttribute('selected', "selected")
                        } else {
                            child[i].removeAttribute('selected')
                        }
                    }
                }
            }
        }

        return this.dom.outerHTML;
    },
    /**
     创建iframe
     */
    writeIframe: function (content) {
        // 方法二：
        var w, doc, iframe = document.createElement('iframe'),
            f = document.body.appendChild(iframe);
        iframe.id = "myIframe";
        iframe.setAttribute('style', 'position:absolute;width:0;height:0;top:-10px;left:-10px;');
        w = f.contentWindow || f.contentDocument;
        doc = f.contentDocument || f.contentWindow.document;
        doc.open();
        doc.write(content);
        doc.close();
        var _this = this
        iframe.onload = function () {
            // 弹出前，回调
            if (_this.conf.printBeforeFn) {
                _this.conf.printBeforeFn({ doc })
            }

            _this.drawEchartImg(doc).then(() => {
                _this.toPrint(w);
                setTimeout(function () {
                    document.body.removeChild(iframe)
                    // 弹出后，回调
                    if (_this.conf.printDoneCallBack) {
                        _this.conf.printDoneCallBack()
                    }
                }, 100)
            })
        }
    },
    /**
     * 项目用到echarts，需要获取图片，来打印
     * @param {Object} doc iframe window
     */
    drawEchartImg(doc) {
        return new Promise((resolve, reject) => {
            if (this.conf.echartDomArr && this.conf.echartDomArr.length > 0) {
                this.conf.echartDomArr.forEach(e => {
                    const dom = doc.querySelector('#' + e.$el.id)
                    const img = new Image()
                    const w = dom.offsetWidth + 'px'
                    const H = dom.offsetHeight + 'px'

                    img.style.width = w
                    img.style.height = H
                    img.src = e.imgSrc
                    dom.innerHTML = ''
                    dom.appendChild(img)
                })
            }
            resolve()
        })
    },
    /**
     打印
     */
    toPrint: function (frameWindow) {
        try {
            setTimeout(function () {
                frameWindow.focus();
                try {
                    if (!frameWindow.document.execCommand('print', false, null)) {
                        frameWindow.print();
                    }
                } catch (e) {
                    frameWindow.print();
                }
                frameWindow.close();
            }, 10);
        } catch (err) {
            console.log('err', err);
        }
    },
    isDOM: (typeof HTMLElement === 'object') ?
        function (obj) {
            return obj instanceof HTMLElement;
        } :
        function (obj) {
            return obj && typeof obj === 'object' && obj.nodeType === 1 && typeof obj.nodeName === 'string';
        },
    /**
     * 设置指定dom元素高度，通过获取该dom元素现有高度，并设置
     * @param {Array} arr
     */
    setDomHeight(arr) {
        if (arr && arr.length) {
            arr.forEach(name => {
                const domArr = document.querySelectorAll(name);
                // debugger
                domArr.forEach(dom => {
                    dom.style.height = dom.offsetHeight + 'px';
                })
            })
        }
    }
};
const MyPlugin = {}
MyPlugin.install = function (Vue, options) {
    // 4. 添加实例方法
    Vue.prototype.$print = Print
};
export default MyPlugin

2.2 在 main.js 文件中引入，全局使用

import print from '@/utils/print'
Vue.use(print)

2.3 创建请假组件模板 LeavePrintView.vue

<template>
  <div id="print-html" ref="PrintView">
    <table style="height: 358px; width: 95%; margin-left: auto; margin-right: auto;border-collapse: collapse;" border="1px" cellpadding="0" cellspacing="0" bordercolor ="#000000"  bordercolordark ="#000000">
      <caption style="padding: 13px 0; font-size: 22px; font-weight: inherit;">请假条</caption>
      <tbody>
      <tr style=" text-align: center;">
        <th width="10%" style="text-align: center; vertical-align: middle;word-wrap:break-word;">申请人</th>
        <td width="15%" style="text-align: center; vertical-align: middle;">{{infoForm&&infoForm.createUserName?infoForm.createUserName:''}}</td>
        <th width="10%" style="text-align: center; vertical-align: middle;">所属部门</th>
        <td width="15%" style="text-align: center; vertical-align: middle;">{{infoForm&&infoForm.userDeptName?infoForm.userDeptName:''}}</td>
        <th width="10%" style="text-align: center; vertical-align: middle;">请假时长</th>
        <td width="15%" style="text-align: center; vertical-align: middle;">{{infoForm&&infoForm.timelen?infoForm.timelen:''}}&nbsp;小时</td>
        <th width="10%" style="text-align: center; vertical-align: middle;">请假类型</th>
        <td width="15%" style="text-align: center; vertical-align: middle;">{{infoForm&&infoForm.leaveTypeLabel?infoForm.leaveTypeLabel:''}}</td>
      </tr>
      <tr style="">
        <th style="text-align: center; vertical-align: middle;">请假事由</th>
        <td style="text-align: center; vertical-align: middle;word-wrap:break-word;" colspan="7">{{infoForm&&infoForm.content?infoForm.content:''}}</td>
      </tr>
      <tr >
        <th style="text-align: center; vertical-align: middle;">申请时间</th>
        <td style="text-align: center; vertical-align: middle;">{{infoForm&&infoForm.createTime?momentObj(infoForm.createTime).format('YYYY-MM-DD'):''}}</td>
        <th style="text-align: center; vertical-align: middle;">开始时间</th>
        <td style="text-align: center; vertical-align: middle;" colspan="2">{{infoForm&&infoForm.startTime?infoForm.startTime:''}}</td>
        <th style="text-align: center; vertical-align: middle;">结束时间</th>
        <td style="text-align: center; vertical-align: middle;" colspan="2">{{infoForm&&infoForm.endTime?infoForm.endTime:''}}</td>
      </tr>
      <tr >
        <th style="text-align: center; vertical-align: middle;">审批</th>
        <td style="text-align: center; vertical-align: middle;word-wrap:break-word;" colspan="3">
          <span  v-for="item in this.checkUserIds" :key="item.id">
            {{item.name}}
          </span>
        </td>
        <th style="text-align: center; vertical-align: middle;">抄送</th>
        <td style="text-align: center; vertical-align: middle;word-wrap:break-word;" colspan="3">
          <span  v-for="item in this.copyUserIds" :key="item.id">
            {{item.name}}
          </span>
        </td>
      </tr>
      <tr >
        <th style="text-align: center; vertical-align: middle;">备注</th>
        <td style="text-align: center; vertical-align: middle;word-wrap:break-word;" colspan="7"></td>
      </tr>
      </tbody>
    </table>
  </div>
</template>
<script>
import moment from "moment"; // 日期格式化工具
import {mapState} from "vuex";

export default {
  name: 'PrintView',
  props: {
    //父组件传递 姓名字段
    name: {
      type: String,
      default: ''
    },
    //父组件传递 部门字段
    deptName: {
      type: String,
      default: ''
    },
    //父组件传递 时长字段
    duration: {
      type: String,
      default: ''
    },
    //父组件传递对象参数
    infoForm: {
      type: Object,
      default () {
        return {}
      }
    },
  },
  data() {
    return {
      momentObj: null,
      checkUserIds:null,
      copyUserIds:null
    }
  },
  created() {
    this.momentObj=moment
  },
  watch: {},
  computed: {
    ...mapState(['allUserlist']), // 获取用户数据
  },
    /**以下所有方法采用同步调用，防止打印时数据丢失**/
  methods: {
    /** 数据进行封装，页面进行回显 **/
    async getCheckUser(checkUserId,copyUserId){
      this.checkUserIds=await this.filterCheckedusers(checkUserId);
      this.copyUserIds= await this.filterCheckedusers(copyUserId);
    },
    /* 审批人 刷选 暴力方法，没做去重直接是清空在复制*/
    async filterCheckedusers(checkedIds) {
      checkedIds = checkedIds ? checkedIds.split(',') : []
      const checkedusers = []
      if(Array.isArray(checkedIds)) {
        checkedIds.forEach(item => {
          checkedusers.push(this.allUserlist.filter(i => (Boolean(item) && i.id === item))[0] )
        })
      } else if(checkedIds) {
        checkedusers.push(this.allUserlist.filter(i => i.id === checkedIds)[0])
      }
      return checkedusers.filter(item => item !== undefined)
    },
  },
}
</script>

2.4 使用组件模板

<div style="position: absolute;right: 26%; top: 3%;z-index: 100;"  >
                    <el-button type="info" size="small" @click="printHandle">
                      <i class="el-icon-printer" style="font-size:60%">打印</i>
                    </el-button>
                    <!-- 打印 -->
                    <print-view ref="PrintView" id="PrintView" style="display: none" :infoForm="infoForm"/>
                  </div>

<script>
// 引用组件
import PrintView from "@/components/print/LeavePrintView";

export default {
        name: 'approval-detail',
        data() {
            return {
              infoForm: {
                    checkUserId:'',
                    copyUserId:''},
            }
        },
        components: {PrintView },
        methods: {
            async printHandle(){
                // 调用子组件方法-进行数据封装
                await this.$refs.PrintView.getCheckUser(this.infoForm.checkUserId,this.infoForm.copyUserId)
                // 调用工具类中的打印方法，进行打印
                this.$print(this.$refs.PrintView.$el, {'styleStr': '#PrintView{display:block !important;}'})
          },
        
        },

}

</script>