使用XPath样式访问Javascript JSON对象属性

您可以尝试以下操作https://lodash.com/docs#set

这里有一个例子：

var object = { 'a': [{ 'b': { 'c': 3 } }] };
lodash.set(object, 'a[0].b.c', 4);
console.log(object.a[0].b.c);

l33teral可能会有所帮助，但它不使用JSONPath。您可以在访问之前"探测"可能存在的路径。披露：我是作者。

这里有一个可能的解决方案，可以将数据存储在JSONPath解析的json中我在这里使用强大的javascript eval：

function jsonPath(obj,expr,arg){var P={resultType:arg&&arg.resultType||"VALUE",result:[],normalize:function(e){var t=[];return e.replace(/['[']('??'(.*?'))[']']/g,function(e,r){return"[#"+(t.push(r)-1)+"]"}).replace(/'?'.'?|'['?/g,";").replace(/;;;|;;/g,";..;").replace(/;$|'?']|'$/g,"").replace(/#([0-9]+)/g,function(e,r){return t[r]})},asPath:function(e){for(var t=e.split(";"),r="$",a=1,n=t.length;n>a;a++)r+=/^[0-9*]+$/.test(t[a])?"["+t[a]+"]":"['"+t[a]+"']";return r},store:function(e,t){return e&&(P.result[P.result.length]="PATH"==P.resultType?P.asPath(e):t),!!e},trace:function(e,t,r){if(e){var a=e.split(";"),n=a.shift();if(a=a.join(";"),t&&t.hasOwnProperty(n))P.trace(a,t[n],r+";"+n);else if("*"===n)P.walk(n,a,t,r,function(e,t,r,a,n){P.trace(e+";"+r,a,n)});else if(".."===n)P.trace(a,t,r),P.walk(n,a,t,r,function(e,t,r,a,n){"object"==typeof a[e]&&P.trace("..;"+r,a[e],n+";"+e)});else if(/,/.test(n))for(var l=n.split(/'?,'?/),s=0,c=l.length;c>s;s++)P.trace(l[s]+";"+a,t,r);else/^'(.*?')$/.test(n)?P.trace(P.eval(n,t,r.substr(r.lastIndexOf(";")+1))+";"+a,t,r):/^'?'(.*?')$/.test(n)?P.walk(n,a,t,r,function(e,t,r,a,n){P.eval(t.replace(/^'?'((.*?)')$/,"$1"),a[e],e)&&P.trace(e+";"+r,a,n)}):/^(-?[0-9]*):(-?[0-9]*):?([0-9]*)$/.test(n)&&P.slice(n,a,t,r)}else P.store(r,t)},walk:function(e,t,r,a,n){if(r instanceof Array)for(var l=0,s=r.length;s>l;l++)l in r&&n(l,e,t,r,a);else if("object"==typeof r)for(var c in r)r.hasOwnProperty(c)&&n(c,e,t,r,a)},slice:function(e,t,r,a){if(r instanceof Array){var n=r.length,l=0,s=n,c=1;e.replace(/^(-?[0-9]*):(-?[0-9]*):?(-?[0-9]*)$/g,function(e,t,r,a){l=parseInt(t||l),s=parseInt(r||s),c=parseInt(a||c)}),l=0>l?Math.max(0,l+n):Math.min(n,l),s=0>s?Math.max(0,s+n):Math.min(n,s);for(var o=l;s>o;o+=c)P.trace(o+";"+t,r,a)}},eval:function(x,_v,_vname){try{return $&&_v&&eval(x.replace(/@/g,"_v"))}catch(e){throw new SyntaxError("jsonPath: "+e.message+": "+x.replace(/@/g,"_v").replace(/'^/g,"_a"))}}},$=obj;return expr&&obj&&("VALUE"==P.resultType||"PATH"==P.resultType)?(P.trace(P.normalize(expr).replace(/^'$;/,""),obj,"$"),P.result.length?P.result:!1):void 0}
var console = {
  log: function(s) {
    s = s.replace(/''n/, '<br/>');
    document.getElementById("console").innerHTML += s + "<br/>"
  }
}
var someData = {
  store: {
    book: [{
      category: "fiction",
      author: "Herman Melville",
      title: "Moby Dick",
      isbn: "0-553-21311-3",
      price: 8.99
    }, {
      category: "fiction",
      author: "some Author",
      title: "The Lord of the Rings",
      isbn: "0-395-19395-8",
      price: 22.99
    }],
  }
}
jsonPathStore = function(obj,path,values) {
 var maps=jsonPath(obj, path,{resultType:"PATH"})
 maps.map(function(item,index) {
  return eval( '(' + item.replace(/'$/,"obj") + '="' + values[index] +'"' + ')' );
 })
}
jsonPathDelete = function(obj,path) {
 var maps=jsonPath(obj, path,{resultType:"PATH"})
 maps.map(function(item,index) {
  return eval( '(' + 'delete ' + item.replace(/'$/,"obj") + ')' );
 })
}
jsonPathRead = function(obj,path) {
 var maps=jsonPath(obj, path,{resultType:"PATH"})
 return maps.map(function(item,index) {
  return eval( '(' + item.replace(/'$/,"obj") + ')' );
 })
}
   
 console.log( "JSON "+JSON.stringify(someData, null, 2) )
 console.log( "jsonPathRead " + JSON.stringify(jsonPathRead(someData,"store.book[*].title"), null, 2) )
 jsonPathStore(someData,"store.book[*].author", ["Loreto", "Loreto Parisi"])
 console.log( "jsonPathStore " + JSON.stringify(someData, null, 2) )
 jsonPathStore(someData,"store.book[*].title", ["JavaScript", "Ninja"])
 jsonPathDelete(someData,"store.book[*].price")
 console.log( "jsonPathDelete " + JSON.stringify( eval("(" + "someData" + ")" ), null, 2) )

<div id="console" />

函数jsonPathStore包含3个参数、json对象、类似xpath的字符串和一个替换数组。函数jsonPathDelete接受两个参数，json对象和类似xpath的字符串。它将删除所有匹配的密钥。

这是一个通用的解决方案，可以进行改进以处理特定的情况。