在JavaScript或jQuery中合并两个JSON字符串

我有一个json，如下所示

"chart": { 
        "xAxisname": "Months",
        "yAxisName": "Year"
    }

我从WebAPI收到的第二个Json如下

[
    {
        "productName": "Personal Loan",
        "loanAmount": [
            {
                "amount": 121000
            },            
            {
                "amount": 145000
            }
        ]
    },
    {
        "productName": "Car Loan",
        "loanAmount": [
            {
                "amount": 180000
            },
            {
                "amount": 210000
            }
        ]
    }
]

我正在寻找一个作为输出

{
    "chart": { 
        "xAxisname": "Months",
        "yAxisName": "Year"
    },    
    "dataset": [
        {
            "productName": "Personal Loan",
            "loanAmount": [
                {
                    "amount": "121000"
                },            
                {
                    "amount": "145000"
                }
            ]
        },
        {
            "productName": "Car Loan",
            "loanAmount": [
                {
                    "amount": "180000"
                },
                {
                    "amount": "210000"
                }
            ]
        }
    ]
}

我已经试过使用JQuery的$。扩展，如下所示

var obj1 = { 
                    "xAxisname": "Months",
                    "yAxisName": "Year"
                    };

        var obj2 = [
                        {
                            "productName": "Personal Loan",
                            "loanAmount": [
                                {
                                    "amount": 121000
                                },            
                                {
                                    "amount": 145000
                                }
                            ]
                        },
                        {
                            "productName": "Car Loan",
                            "loanAmount": [
                                {
                                    "amount": 180000
                                },
                                {
                                    "amount": 210000
                                }
                            ]
                        }
                ];

        var finalObj = $.extend(obj1, obj2);

虽然它正在合并，但并不像预期的那样。

var obj1={
“XaxiName”：“月份”，
“yAxisName”：“年”
};
变量obj2=[{
“产品名称”：“个人贷款”，
“loanAmount”：[{
“金额”：121000
}, {
“金额”：145000
}]
}, {
“产品名称”：“汽车贷款”，
“loanAmount”：[{
“金额”：180000
}, {
“金额”：210000
}]
}];
var finalObj=$.extend（{chart:obj1}，{dataset:obj2}）；
//或者只是
var otherObj={
图表：obj1，
数据集：obj2
}
console.log（finalObj）；
console.log（otherObj）


var j1=
{ 
“XaxiName”：“月份”，
“yAxisName”：“年”
};
变量j2=[
{
“产品名称”：“个人贷款”，
“loanAmount”：[
{
“金额”：121000
},            
{
“金额”：145000
}
]
},
{
“产品名称”：“汽车贷款”，
“loanAmount”：[
{
“金额”：180000
},
{
“金额”：210000
}
]
}
];
var j3={}；
j3[“图表”]=j1；
j3[“数据集”]=j2；
log（JSON.stringify（j3））
var finalobj={“图表”：obj1，“数据集”：obj2}
？