JavaScript读取JSON文件

$.getJSON ("js/userinfo.txt", function (data)  {  
    $.each (data, function (i, item)  {  
        $ ("#disp").append ("<h3>" + item.name + "</h3>");  
    });  
});

$.ajax({
  type: "get",
  url: "demo.json",
  dataType: "json",
  async: false,
  success: function(data){
    $.each (data, function (i, item)  {  
        $ ("#disp").append ("<h3>" + item.name + "</h3>"); 
    }); 
  }
});