解析json字符串：eval

最新推荐文章于 2025-08-11 01:12:22 发布

web_smalbird

最新推荐文章于 2025-08-11 01:12:22 发布

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文章标签： json 解析 eval

本文链接：https://blog.youkuaiyun.com/web_smalbird/article/details/47613797

本文详细解析如何解析JSON字符串，包括单对象和对象数组的处理方法，通过实例展示JavaScript中eval函数的应用。

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解析json字符串str

1、单对象

var str='{"WiFiMaxClients":10",WiFiSSID":"MiFi6620L-A087"}';
var data=eval("("+str+")");
$("#maxNum").text(data.WiFiMaxClients);
$("#connectedDevicesTitle").text(_("connected_devices_devices") + " (" + data.WiFiSSID + ")");

2、对象数组

devicesData = devicesData = '[ {"ConnectedDeviceMacAddress": "bc:f5:ac:f7:15:71" },{"ConnectedDeviceMacAddress": "5c:f5:da:ed:98:a7" },{ "ConnectedDeviceMacAddress": "10:41:7f:39:c9:13", "Block": 0, "Status": "Offline" } ]';
connectedDevicesData = eval("("+devicesData+")");
if(oldconnectedDevicesData.length != connectedDevicesData.length || oldconnectedDevicesData == ""){
needReloadConConnectedDevice = true;

}else if(connectedDevicesData.length > 0){
for (var i=0; i < connectedDevicesData.length; i++) {
if(oldconnectedDevicesData[i].ConnectedDeviceMacAddress != connectedDevicesData[i].ConnectedDeviceMacAddress){
needReloadConConnectedDevice = true;
break;
}
};
}else if(connectedDevicesData.length == 0){
needReloadConConnectedDevice = true;
}