我的虚拟 JSON 格式如下:
{
"a":"guig",
"b":"khih",
"c":[
{
"k1":"ert",
"k2":"uii"
},
{
"k1":"ert1"
},
{
"k1":"ert2",
"k2":"uii2"
}],
"d":{
"e":"yfyuf",
"f":[
{
"kk1":"ert",
"kk2":"uii"
},
{
"kk1":"ert1",
"kk2":"uii1"
},
{
"kk1":"ert2",
"kk2":"uii2"
}
]
},
"h":78767
},
{
"a":"guig",
"b":"khih",
"c":[
{
"k1":"ert"
},
{
"k1":"ert1",
"k2":"uii"
},
{
"k1":"ert2",
"k2":"uii2"
}],
"d":{
"e":"yfyuf",
"f":[
{
"kk1":"ert",
"kk2":"uii"
},
{
"kk1":"ert1",
"kk2":"uii1"
}
]
},
"i":78767
},
.....
我想将上面的 JSON 转换为以下格式的字符串(基本上与 csv 兼容，第一行将是它的标题):
a, b, c1_k1, c2_k1, c3_k1, c1_k2, c2_k2, c3_k2, d_e, d_f1_kk1, d_f2_kk1, d_f3_kk1, d_f1_kk2, d_f2_kk2, d_f3_kk2, h, i
guig, khih, ert, ert1, ert2, uii, , uii2, yfyuf, ert, ert1, ert2, uii, uii1, , 78767,
guig, khih, ert, ert1, ert2, , uii , uii2, yfyuf, ert, ert1, ert2, uii, uii1, , ,78767,
field like c1,..Cn comes as much as key duplication are available and wherever values are not present the logic should append extra comma for empty cell. Values of any key can be Array, Object or String
我尝试的失败逻辑如下
逻辑:1
ItrStr=function(k,h) {
if(typeof k == "string"){
itsLine+= k+",";
itsHdr += h+",";
}else if(k && k.length){
ItrArr(k);
} else{
ItrObj(k);
}
},
ItrArr=function(k) {
if(k.length){
k.forEach((o)=>{
ItrStr(o,"");
});
}else{
ItrObj(k);
}
},
ItrObj=function(k) {
if(k){
let itsKs=Object.keys(k);
itsKs.forEach((o)=> {
let k1 = k[o];
ItrStr(k1,o);
});
}else {
itsLine += ",";
itsHdr += ",";
}
};
let ttp=inputJson;
itsLine="";
ItrObj(ttp);
itsLine=itsLine.replace(/\r/g,"").replace(/\n/g,"")+"\n";
if(!isHdrWrote){
fs.appendFile(dir,itsHdr);
isHdrWrote=true;
}else{
fs.appendFile(dir,itsLine);
}
逻辑:2
findObjectByHDR = function(obj) {
if(!obj){ return "" }
if(Array.isArray(obj)) {
obj.forEach((o)=>{
if(o){
findObjectByHDR(o);
}
});
}else{
for(let i in obj) {
if(obj.hasOwnProperty(i)){
if(typeof obj[i] == "string" || typeof obj[i]== "number"){
if(i.length == 1){
console.log("i: ",i," : ",obj);
}
if(agrtHdr.indexOf(i)<0){
agrtHdr.push(i);
}/*else {
if(addDups[i]){
addDups[i]++;
}else{
addDups[i]=0;
}
agrtHdr.push(addDups[i]+"---"+i);
}*/
}else if(Array.isArray(obj[i])) {
obj[i].forEach((o)=>{
if(o){
//console.log("arr",o);
findObjectByHDR(o);
}
});
}else {
for(let i1 in obj[i]) {
if(obj[i].hasOwnProperty(i1)){
if(typeof obj[i][i1] == "string" || typeof obj[i][i1]== "number"){
if(agrtHdr.indexOf(i1)<0){
agrtHdr.push(i1);
}
}else{
findObjectByHDR(obj[i][i1]);
}
}
}
}
}
}
}
},
findObjectByLBL = function(obj,lbl) {
if(!obj){ return "" }
if(Array.isArray(obj)) {
obj.forEach((o)=>{
if(o){
findObjectByLBL(o,lbl);
}
});
}else if(typeof obj[lbl] == "string" || typeof obj[lbl]== "number"){
return ""+obj[lbl];
}
else if(typeof obj != "string" && typeof obj!= "number") {
for(let i in obj) {
if(obj.hasOwnProperty(i)){
if(Array.isArray(obj[i])) {
obj[i].forEach((o)=>{
if(o){
findObjectByLBL(o,lbl);
}
});
}else if(obj[i]){
if(typeof obj[i] != "string" && typeof obj[i]!= "number"){
findObjectByLBL(obj[i],lbl);
}
}
}
}
}
}
let ttp=inputJson;
itsHdr="";
var crntLin=[];
if(!dtRed){
findObjectByHDR(ttp);
}
if(dtRed){
for(let ik=0;ik<agrtHdr.length;ik++){
let iitln=findObjectByLabel(ttp,agrtHdr[ik]);
if(!iitln){
console.log(ik,":",lineNr,"--",agrtHdr[ik]," : agrtHdr: "," : ",iitln);
}
if(iitln){
crntLin.push(iitln.replace(/\r/g,"").replace(/\n/g,""));
}else{
crntLin.push("");
}
}
fs.appendFile(dir,crntLin.join(",")+"\n");
}
最佳答案
我尝试了以下有效的方法:
var dir = path.join(__dirname,'./slack.csv'),
jsn=require(path.join(__dirname,'./slack.json')),
itsHdrAll=[],
itsHdrAllAr=[],
finlHdr=[],
findObjectByHDR = function (){
let obj=arguments[0];
let arg1=arguments[1];
if(Array.isArray(obj)){
obj.forEach((o,i)=>{
let crntProp=arg1?arg1:[];
crntProp.push({cameFrm:"Arr",ind:i});
findObjectByHDR(o,crntProp)
});
}else{
for(let k in obj) {
if(obj.hasOwnProperty(k)){
if(typeof obj[k] == "string" || typeof obj[k] == "number"){
let arg1=arguments[1];
let itsHdr="";
if(arg1){
arg1.forEach(o=>{
if(o.cameFrm=="Arr"){
if(o.ind !=0){
itsHdr=itsHdr.substring(0,itsHdr.length-4) + o.ind+"___";
}else{
itsHdr+= o.ind+"___";
}
}else if(o.cameFrm=="Obj"){
itsHdr+= o.prop+"___";
}
});
}
itsHdr += k+"___";
itsHdrAll.push(itsHdr);
}else {
let crntProp=arg1?arg1:[];
crntProp.push({cameFrm:"Obj",prop:k});
findObjectByHDR(obj[k],crntProp)
}
}
}
}
};
for(let j=0;j<jsn.length;j++){
findObjectByHDR(jsn[j]);
itsHdrAllAr.push(itsHdrAll);
itsHdrAll=[];
}
itsHdrAllAr.forEach(o=>{
o.forEach(o1=>{
if(finlHdr.indexOf(o1)<0){
finlHdr.push(o1);
}
});
});
finlHdr=finlHdr.map(o=>{
return o.substring(0,o.length-3);
});
finlHdr.sort();
console.log("finlHdr: ",finlHdr);
fs.appendFile(dir,finlHdr.join(",")+"\n");
关于javascript - 根据 JSON 中可用的值将嵌套 json 转换为特定格式的字符串，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/38053080/