项目实战

html

<!DOCTYPE html>
<html>
    <head>
        <meta charset="utf-8" />
        <script type="text/javascript" src="js/jquery-2.1.4.min.js"></script>
        <style type="text/css">
            table{border-collapse: collapse; width: 100%;}
            table tr td{border: red solid 1px;  width: 50%; text-align: center;}
        </style>
    </head>
    <body>
        <table>
        </table>
        <script type="text/javascript">
            $.ajax({   
                type: "get",   
                  url:  "DB.json", 
                  datatype: "json",
                   success: function (data) {
                       for (var i=0; i<data.length; i++) {
                           $("table").append(
                               "<tr><td>"+data[i].name+"</td><td>"+data[i].age+"</td></tr>"
                           )
                       }
                   },
                   error:function () { alert("Ajax请求Json错误");}
               });
        </script>
    </body>
</html>

json

[
{"name": "小王",  "age": "10" },
{ "name": "小丁",  "age": "20" },
{ "name": "小红",  "age": "18" }
]

效果