JSON（JavaScript Object Notation）是一種輕量級(jí)的數(shù)據(jù)交換格式，常用于將數(shù)據(jù)從服務(wù)器傳遞到客戶端。當(dāng)我們處理JSON數(shù)據(jù)時(shí)，經(jīng)常需要比對(duì)兩個(gè)JSON串的內(nèi)容，以檢查它們是否相同或者有哪些差異。下面我們將介紹如何比對(duì)兩個(gè)JSON串內(nèi)容。

//第一個(gè)JSON串
{
"name": "Amy",
"age": 25,
"sex": "female",
"adress": {
"city": "Beijing",
"province": "Bejing",
"country": "China"
},
"hobby": ["reading", "singing", "travel"],
"education": [
{
"degree": "bachelor",
"school": "Tsinghua University"
},
{
"degree": "master",
"school": "Peking University"
}
]
}

//第二個(gè)JSON串
{
"name": "Amy",
"age": 25,
"sex": "female",
"adress": {
"city": "Beijing",
"province": "Bejing",
"country": "China"
},
"hobby": ["reading", "singing", "swimming"],
"education": [
{
"degree": "bachelor",
"school": "Tsinghua University"
},
{
"degree": "master",
"school": "Harvard University"
}
]
}

首先，我們可以解析這兩個(gè)JSON串并轉(zhuǎn)換為JavaScript對(duì)象，然后使用for-in循環(huán)遍歷檢查每一個(gè)鍵值對(duì)。具體代碼如下：

const obj1 = JSON.parse(json1);
const obj2 = JSON.parse(json2);
function compareJSON(obj1, obj2) {
for (let key in obj1) {
if (typeof obj1[key] !== typeof obj2[key]) {
return false;
}
if (typeof obj1[key] === 'object') {
if (!compareJSON(obj1[key], obj2[key])) {
return false;
}
} else if (obj1[key] !== obj2[key]) {
return false;
}
}
for (let key in obj2) {
if (!obj1.hasOwnProperty(key)) {
return false;
}
}
return true;
}
console.log(compareJSON(obj1, obj2));

代碼中使用遞歸的方式來遍歷兩個(gè)JSON對(duì)象。如果兩個(gè)JSON對(duì)象不是同一類型，或者值不相等，或者鍵名不一致就返回false，否則就返回true。

比較結(jié)果為false，因?yàn)閮蓚€(gè)JSON對(duì)象中，Amy的第二個(gè)愛好不同，她的第二個(gè)學(xué)位學(xué)校也不同。