Javascript 和Jquery 通过ID 获取值。
<script>
var txt1 = [{ "CityId": 18, "CityName": "西安", "ProvinceId": 27, "CityOrder": 1 }, { "CityId": 53, "CityName": "广州", "ProvinceId": 27, "CityOrder": 1 }];
$("#a1").html(txt1[0].CityName);
document.getElementById("a1").innerHTML = txt1[0].CityName;
//以上两种写法结果都一样。通过Id 获取值。
</script>
<body>
<p>
城市:<span id="a1"></span><br />
</p>
</body>
Json 对象处理:
<script>
var j1 = { "firstName": "John", "lastName": "Doe" }; var j11 = j1.firstName; alert(j11);
</script>
Json数组：
<script>
var aa1 =
{
"employees": [
{ "firstName": "John", "lastName": "Doe" },
{ "firstName": "Anna", "lastName": "Smith" },
{ "firstName": "Peter", "lastName": "Jones" }
]
};
$("#a1").html(aa1.employees[1].firstName);
$("#a2").html(aa1.employees[1].lastName);
</script>
<body>
<p>
编号:<span id="a1"></span><br />
姓名:<span id="a2"></span><br/>
</p>
</body>
Json 字符串：
由于 JSON 语法是 JavaScript 语法的子集，JavaScript 函数 eval() 可用于将 JSON 文本转换为 JavaScript 对象。
eval() 函数使用的是 JavaScript 编译器，可解析 JSON 文本，然后生成 JavaScript 对象。必须把文本包围在括号中，这样才能避免语法错误：
<script>
var txt = '{ "employees" : [' +
'{ "firstName":"Bill" , "lastName":"Gates" },' +
'{ "firstName":"George" , "lastName":"Bush" },' +
'{ "firstName":"Thomas" , "lastName":"Carter" } ]}';
var jtxt = eval("(" + txt + ")");
;
$("#a1").html(jtxt.employees[1].firstName);
$("#a2").html(jtxt.employees[1].lastName);
</script>
<body>
<p>
编号:<span id="a1"></span><br />
姓名:<span id="a2"></span><br/>
</p>
</body>