uniapp通过绝对路径解压zpi中的shpe转化为geojson

async fileResult() {const filepath11 = '/storage/emulated/0/importData/Export_Output_6.zip';// Base64解码函数function base64ToArrayBuffer(base64) {const binaryString = atob(base64.split(',')[1]);const len = binaryString.length;const bytes = new Uint8Array(len);for (let i = 0; i < len; i++) {bytes[i] = binaryString.charCodeAt(i);}return bytes.buffer;}function readFileAsBase64(filepath, callback) {// 使用 plus.io.resolveLocalFileSystemURL 获取文件对象plus.io.resolveLocalFileSystemURL(filepath, (entry) => {// 使用 entry.file 获取文件对象entry.file((file) => {const reader = new plus.io.FileReader();// 使用 readAsDataURL 方法读取文件内容reader.readAsDataURL(file);// 定义 onloadend 回调reader.onloadend = (e) => {const base64 = e.target.result;callback(base64);};// 定义 onerror 回调reader.onerror = (e) => {console.error('读取文件错误:', e);};}, (error) => {console.error('获取文件失败:', error);});}, (error) => {console.error('解析文件路径失败:', error);});}// 读取文件并转换为 ArrayBufferreadFileAsBase64(filepath11, (base64) => {const arrayBuffer = base64ToArrayBuffer(base64);JSZip.loadAsync(arrayBuffer).then((zip) => {const shapefiles = zip.file(/.*\.shp$/i); // 正则匹配 .shp 文件if (shapefiles.length) {shapefiles[0].async('arraybuffer').then((shpArrayBuffer) => {shapefile.read(shpArrayBuffer).then((geojson) => {console.log(geojson, '转好的geojson数据');// self.handleGeojson(geojson, data.file);}).catch((error) => {console.error('读取 shapefile 失败:', error);});}).catch((error) => {console.error('读取 .shp 文件失败:', error);});} else {console.error('未找到 .shp 文件');}}).catch((error) => {console.error('解压缩 ZIP 文件失败:', error);});});},

把geojson转化为wkt：
ShpeFileZip.js：

/*** 检索组件绘制方法封装： DrawArea*/
import Draw from 'ol/interaction/Draw.js';
import {OSM,Vector as VectorSource
} from 'ol/source.js';
import {Tile as TileLayer,Vector as VectorLayer
} from 'ol/layer.js';
import {Circle,Fill,Stroke,Style,
} from 'ol/style';
import {GeometryCollection,LineString,LinearRing,MultiLineString,MultiPoint,MultiPolygon,Point,Polygon,
} from 'ol/geom.js';
import {createRegularPolygon
} from 'ol/interaction/Draw.js';
import {WKT
} from 'ol/format.js';
import {fromCircle
} from 'ol/geom/Polygon';import * as jsts from 'jsts/dist/jsts.min.js';export class ShpeFileZip {format = new WKT();jstsPraser;getJstsPraser() {return this.jstsPraser;}/*** 初始化jsts的parser */innitParser() {const parser = new jsts.io.OL3Parser();parser.inject(Point,LineString,LinearRing,Polygon,MultiPoint,MultiLineString,MultiPolygon,);this.jstsPraser = parser;}constructor() {this.innitParser();}/*** 把中文件中读取到的geojson转化为wkt或者geometry** @params geojson：范围数据* @params type: wkt,geom* return: wkt/geometry*/hansleZipGeojson(geojson, type = 'wkt') {const format = this.format;const parser = this.jstsPraser;return new Promise((resolve) => {// 工作区范围featuresconst workspaceFeatures = geojson.features;try {// 如果工作区范围是多个feature，合并成一个let newWfGeometry;if (workspaceFeatures.length > 0) {workspaceFeatures.forEach((wkFeature) => {// 获取类型const {type,coordinates: mapdata} = wkFeature.geometry;let geometry;if (type === 'Polygon') {geometry = new Polygon(mapdata); // 创建一个 Polygon 对象const wfGeometry1 = parser.read(geometry);newWfGeometry = newWfGeometry ? newWfGeometry.union(wfGeometry1) :wfGeometry1;} else if (type === 'MultiPolygon') {// 为每个多边形创建 Polygonconst polygons = mapdata.map((polygonCoords) => new Polygon(polygonCoords));geometry = new MultiPolygon(polygons); // 创建一个 MultiPolygon 对象const wfGeometry1 = parser.read(geometry);newWfGeometry = newWfGeometry ? newWfGeometry.union(wfGeometry1) :wfGeometry1;} else {uni.showToast({icon: 'none',title: '区域范围必须是面数据！',position: 'bottom', // （仅App生效）});resolve(null);}});if (newWfGeometry) {// 转为wktconst newWkt = format.writeGeometry(parser.write(newWfGeometry));resolve(newWkt);}} else {this.$message.error('数据有误，请重新上传！');resolve(null);}} catch (e) {console.log('解析失败！', e);resolve(null);}});}
}

使用：

import {ShpeFileZip} from '@/map/ShpeFileZip.js';// 这里只放了关键代码----data() {return {ShpeFileZip: null,}},mounted() {// this.getBetter1meterRanking();this.ShpeFileZip = new ShpeFileZip();},// 调用this.ShpeFileZip.hansleZipGeojson(geojson).then((wkt) => {console.log('wkt数据', wkt);});