javascript code for looping to read JSON data_json

The server backend returns the JSON format string to the client:
var str = '[{"uname":"Wang Qiang","day":"2010/06/17"},{"uname":"Wang Haiyun" ,"day":"2010/06/11"}]';

We convert it into a JSON object: var jsonList=eval("(" str ")"); At this time, if you use Click to trace and view this jsonList object. In fact, you will find that its length is 2, that is, jsonList.length=2. Each of its items is a separate JSON object. Please look at the picture below:


At this time, assuming that we do not know the key values ​​​​of "uname" and "day", we start to perform loop operations on jsonList.

Copy code The code is as follows:

for(var i=0;i
for(var key in jsonList[i]){
alert("key：" key ",value：" jsonList[i][key]);
}
　}

　This way we can easily get the key and value values ​​I need.