上传json文件提取文本后比对

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1.采用的是element上传组件,action必写

<el-upload action="/" ref="upload" accept=".json" :before-upload="beforeUpload" :disabled="this.fileList.length !== 0" :default-file-list="this.fileList">
<el-button type="primary" :disabled="this.fileList.length !== 0">上传文件</el-button>
</el-upload>

2.读取上传的组件的文本,根据自己的需要可以转换成对象JSON.parse(str)

beforeCreate() {
// 读取文件
FileReader.prototype.reading = function ({encode} = pms) {
	let bytes = new Uint8Array(this.result);    //无符号整型数组
	let text = new TextDecoder(encode || 'UTF-8').decode(bytes);
	return text;
};
/* 重写readAsBinaryString函数 */
FileReader.prototype.readAsBinaryString = function (f) {
	if (!this.onload)       //如果this未重写onload函数,则创建一个公共处理方式
	this.onload = e => {  //在this.onload函数中,完成公共处理
		let rs = this.reading();
		console.log(rs);
		};
	this.readAsArrayBuffer(f);  //内部会回调this.onload方法
	};
},
methods:{
    beforeUpload(file){
        this.fileList = [file]
        console.log('选择了文件beforeUpload')
        // 读取数据
        this.read(file);
        return false
    },
    read(f) {
	let rd = new FileReader();
	rd.onload = e => {  
         //this.readAsArrayBuffer函数内,会回调this.onload函数。在这里处理结果
	let cont = rd.reading({encode: 'GBK'});//如果有中文采用UTF-8
	console.log(cont);
	let formerData = this.textData;
	this.textData = formerData + "\n" + cont;
	};
	rd.readAsBinaryString(f);
	}
}

3.安装json比对npm install --save vue-json-compare

<div>
   <vue-json-compare :oldData="oldData" :newData="newData"></vue-json-compare>
</div>
import vueJsonCompare from 'vue-json-compare'//导入组件
components: {//注册组件
    vueJsonCompare
  },