IDCOL/webConfig/src/store/node.js

let fs = require('fs');
let params = {
    type: "FeatureCollection",
    totalFeatures: 544,
    features: [
    ]
}
function writeJson(params){
    //现将json文件读出来
    fs.readFile('./map_bf.json',function(err,data){
        console.log('读取文件')
        if(err){
            return console.error(err);
        }
        console.log('读取文件成功')
        let bangladesh = data.toString();//将二进制的数据转换为字符串
        bangladesh = JSON.parse(bangladesh);//将字符串转换为json对象

        let arr2 = [];
        console.log('开始计算')
        let i = 0;
        // let cityName = [];
        let provinceNameArr = ["Barisal", "Chittagong", "Rajshahi", "Rangpur", "Dhaka", "Sylhet", "Mymensingh", "Khulna"];
        let provinceNameArrJSON = {
            Barisal:{
                type: "FeatureCollection",
                totalFeatures: 544,
                features: [
                ],
            },
            Chittagong:{
                type: "FeatureCollection",
                totalFeatures: 544,
                features: [
                ],
            },
            Rajshahi:{
                type: "FeatureCollection",
                totalFeatures: 544,
                features: [
                ],
            },
            Rangpur:{
                type: "FeatureCollection",
                totalFeatures: 544,
                features: [
                ],
            },
            Dhaka:{
                type: "FeatureCollection",
                totalFeatures: 544,
                features: [
                ],
            },
            Sylhet:{
                type: "FeatureCollection",
                totalFeatures: 544,
                features: [
                ],
            },
            Mymensingh:{
                type: "FeatureCollection",
                totalFeatures: 544,
                features: [
                ],
            },
            Khulna:{
                type: "FeatureCollection",
                totalFeatures: 544,
                features: [
                ],
            },
        };
        let cityName = {
            Barisal:['Barguna','Barisal','Bhola','Jhalokati','Patuakhali','Pirojpur'],
            Chittagong:['Bandarban','Brahmanbaria','Chandpur','Chittagong','Khagrachhari','Lakshmipur','Noakhali','Rangamati','Comilla','Cox\'s Bazar','Feni'],
            Rajshahi:['Naogaon','Natore','Chapai Nawabganj','Pabna','Rajshahi','Sirajganj','Bogra','Joypurhat'],
            Rangpur:['Dinajpur','Gaibandha','Kurigram','Lalmonirhat','Nilphamari','Panchagarh','Rangpur','Thakurgaon'],
            Dhaka:[ 'Dhaka','Kishoreganj','Madaripur','Manikganj','Munshiganj','Narayanganj','Narsingdi','Rajbari','Shariatpur','Tangail','Faridpur','Gazipur','Gopalganj'],
            Sylhet:['Habiganj', 'Maulvibazar', 'Sunamganj', 'Sylhet'],
            Mymensingh:[ 'Mymensingh', 'Netrakona', 'Sherpur', 'Jamalpur'],
            Khulna:[ 'Bagerhat','Chuadanga','Jessore','Jhenaidah','Khulna','Kushtia','Magura','Meherpur','Narail','Satkhira']
        };
        let arr3Length = 0;
        let index = 0;
        let number = 0;
        // Pirojpur
        let fun = function(arr,provinceName,name,item,cfName){
            let arr3 = [];
            // console.log('计算第'+i+'轮开始');
            // console.log(item)
            for(let d of arr){
                // d.properties.name = d.properties.Divi_name+'-'+ d.properties.Dist_name+'-'+ d.properties.Upaz_name;
                // d.properties.name = d.properties.Divi_name;
                // d.properties.name = d.properties.Dist_name;
                // d.properties.name = d.properties.Upaz_name;
                // console.log(d.properties.Dist_name+' '+name,'----8888888888888888-----')
                if(d.properties.Divi_name == provinceName){
                    if(d.properties.Dist_name == name){
                        if(d.properties.Upaz_name=='Kutubdia Upazila'||d.properties.Upaz_name=='Maheshkhali Upazila'||d.properties.Upaz_name=='Phulbari Sadar Upazila'||d.properties.Upaz_name=='Bhurungamari Upazila'){
                            continue
                        }
                        if(cfName == d.properties.Upaz_name){
                            continue
                        }
                        item.properties.name = d.properties.Dist_name+' Division';
                        if(item.geometry.coordinates.length == 0){
                            number++;
                            item.geometry.coordinates = JSON.parse(JSON.stringify(d.geometry.coordinates));
                            console.log('已筛选 '+number+' '+d.properties.Upaz_name+'-------------1---------');
                        }else{
                            let xArr = [],xIndex = 0;
                            let yArr = [],yIndex = 0;
                            let x1 = 0;
                            let x2 = 0;
                            let y1 = 0;
                            let y2 = 0;
                            let xk = false;
                            let xkk = false;
                            let yk = false;
                            let ykk = false;
                            for(let j in d.geometry.coordinates[0][0]){
                                for(let key in item.geometry.coordinates[0][0]){
                                    if(Math.abs(item.geometry.coordinates[0][0][key][0] - d.geometry.coordinates[0][0][j][0])+Math.abs(item.geometry.coordinates[0][0][key][1] - d.geometry.coordinates[0][0][j][1]) < 0.0000001){
                                        if(!x1){
                                            x1 = Number(key);
                                            xArr[xIndex] = Number(key);
                                        }else{
                                            if(Math.abs(x2-Number(key)) > 20){
                                                xIndex++;
                                                xArr[xIndex] = x2;
                                                xIndex++;
                                                xArr[xIndex] = Number(key);
                                            }
                                        }
                                        if(!y1){
                                            y1 = Number(j);
                                            yArr[yIndex] = Number(j);
                                        }else{
                                            if(Math.abs(y2-Number(j)) > 20){
                                                yIndex++;
                                                yArr[yIndex] = y2;
                                                yIndex++;
                                                yArr[yIndex] = Number(j);
                                            }
                                        }
                                        x2 = Number(key);
                                        y2 = Number(j);
                                        if(!xk&&x1!=x2){
                                            xk = x2-x1>0?'+':'-'
                                            xkk = x2;
                                        }
                                        if(!yk&&y1!=y2){
                                            yk = y2-y1>0?'+':'-';
                                            ykk = y2;
                                        }
                                        break;
                                    }
                                }
                            }
                            xIndex++;
                            xArr[xIndex] = Number(x2);
                            yIndex++;
                            yArr[yIndex] = Number(y2);
                            if(x1||x2||y1||y2){
                                console.log(xArr,item.geometry.coordinates[0][0].length,yArr,d.geometry.coordinates[0][0].length,'-------')
                                if(yArr.length == 4){
                                    y1 = yArr[2]
                                    y2 = yArr[1]
                                }
                                if(y2>y1){
                                    arr2 = d.geometry.coordinates[0][0].slice(y2,d.geometry.coordinates[0][0].length)
                                    arr2.push(...(d.geometry.coordinates[0][0].slice(0,y1)))
                                }else{
                                    arr2 = d.geometry.coordinates[0][0].slice(y2,y1)
                                }
                                if(x2>x1){
                                    item.geometry.coordinates[0][0].splice(x2,item.geometry.coordinates[0][0].length-1-x2)
                                    item.geometry.coordinates[0][0].splice(0,x1,...arr2)
                                }else if(x2 == x1){
                                    x1 = Math.max(...xArr)
                                    x2 = Math.min(...xArr)
                                    console.log(x1,x2)
                                    item.geometry.coordinates[0][0].splice(x2,x1-x2,...arr2)
                                }else{
                                    item.geometry.coordinates[0][0].splice(x2,x1-x2,...arr2)
                                }
                                if(d.geometry.coordinates.length>1){
                                    item.geometry.coordinates.push(...d.geometry.coordinates.slice(1,d.geometry.coordinates.length))
                                }
                                number++;
                                console.log('已筛选 '+number+' '+d.properties.Upaz_name+'-------------2---------');
                            }else{
                                arr3.push(d)
                            }
                            console.log(provinceName+'-'+name+'-'+d.properties.Upaz_name+' '+arr3.length+'_'+arr3Length+'-'+index);
                            // d.geometry.coordinates[0][0] = arr1
                        }

                    }
                }
            }
            if(arr3Length == arr3.length){
                index++;
            }else{
                index = 0;
                arr3Length = 0;
            }
            if(arr3.length>0&&index<2){
                arr3Length = arr3.length;
                fun(arr3,provinceName,name,item)
            }else{
                if(index>=2){
                    item = {
                        type: "Feature",
                        geometry: {
                            type: "MultiPolygon",
                            coordinates: arr3[0].geometry.coordinates
                        },
                        properties: {
                            name:'',
                        }
                    }
                    index = 0;
                    number = 1;
                    arr3Length = 0;
                    console.log('已筛选 '+number+' '+arr3[0].properties.Upaz_name+'-------------3---------');
                    fun(bangladesh.features,'Barisal',name,item,arr3[0].properties.Upaz_name)
                }else{   
                    console.log(item.geometry.coordinates[0][0].length+'-------------')
                    provinceNameArrJSON[provinceName].features.push(item)
                    if(provinceNameArrJSON[provinceName].features.length>0){
                        console.log(provinceName+' '+name+'已计算');
                        console.log(provinceNameArrJSON[provinceName].features.length+'-'+cityName[provinceName].length)
                        if(provinceNameArrJSON[provinceName].features.length == cityName[provinceName].length){
                            let str = JSON.stringify(provinceNameArrJSON[provinceName]);//因为nodejs的写入文件只认识字符串或者二进制数，所以把json对象转换成字符串重新写入json文件中
                            // console.log(str)
                            fs.writeFile('./'+provinceName+'.json',str,function(err){
                                if(err){
                                    console.log(err);
                                }
                                console.log('----------'+provinceName+'计算完成-------------');
                            })
                        }
                    }
                }
                
            }
        }
        // for(let provinceName of provinceNameArr){
            for(let name of cityName['Barisal']){
                let item = {
                    type: "Feature",
                    geometry: {
                        type: "MultiPolygon",
                        coordinates: [[[]]]
                    },
                    properties: {
                        name:'',
                    }
                }
                index = 0;
                number = 0;
                arr3Length = 0;
                fun(bangladesh.features,'Barisal',name,item)
            }
            // fun(bangladesh.features,'Barisal','Bhola',item)
        // }
        // fun(bangladesh.features,'Khulna')
        // console.log(cityName)

        // params.features.push(item);//将传来的对象push进数组对象中

        // var str = JSON.stringify(params);//因为nodejs的写入文件只认识字符串或者二进制数，所以把json对象转换成字符串重新写入json文件中
        // fs.writeFile('./person.json',str,function(err){
        //     if(err){
        //         console.error(err);
        //     }
        //     console.log('----------计算完成-------------');
        // })
    })
}
writeJson(params)//执行一下;