JavaScript深度比较两个JSON对象是否相等的实现方法

function isObj(object) {
return object && typeof (object) == 'object' && Object.prototype.toString.call(object).toLowerCase() == "[object object]";
}
function isArray(object) {
return object && typeof (object) == 'object' && object.constructor == Array;
}
function getLength(object) {
var count = 0;
for (var i in object) count++;
return count;
}

测试数据定义

var jsonObjA = {
"Name": "MyName",
"Company": "MyCompany",
"Infos": [
{ "Age": "100" },
{
"Box": [
{ "Height": "100" },
{ "Weight": "200" }
]
}
],
"Address": "马栏山"
}
var jsonObjB = {
"Name": "MyName",
"Company": "MyCompany",
"Infos": [
{ "Age": "100" },
{
"Box": [
{ "Height": "100" },
{ "Weight": "200" }
]
}
],
"Address": "马栏山二号"
}

核心比较算法实现

function Compare(objA, objB) {
if (!isObj(objA) || !isObj(objB)) return false; //判断类型是否正确
if (getLength(objA) != getLength(objB)) return false; //判断长度是否一致
return CompareObj(objA, objB, true);//默认为true
}
function CompareObj(objA, objB, flag) {
for (var key in objA) {
if (!flag) //跳出整个循环
break;
if (!objB.hasOwnProperty(key)) { flag = false; break; }
if (!isArray(objA[key])) { //子级不是数组时,比较属性值
if (objB[key] != objA[key]) { flag = false; break; }
} else {
if (!isArray(objB[key])) { flag = false; break; }
var oA = objA[key], oB = objB[key];
if (oA.length != oB.length) { flag = false; break; }
for (var k in oA) {
if (!flag) //这里跳出循环是为了不让递归继续
break;
flag = CompareObj(oA[k], oB[k], flag);
}
}
}
return flag;
}

调用与结果验证

var result = Compare(jsonObjA, jsonObjB);
console.log(result); // true or false