先看效果截图：

js-依赖jquery

<script src="https://cdn.bootcss.com/jquery/3.2.1/jquery.js"></script>
<script type="text/javascript">
$(function(){
	$('#btn').on('click',function () {
        var thishtml=""
        $.ajax({
            url: 'data_list.html',//这里直接放data_list.json也可以
            dataType:'json',method: 'get',success: function (data) {
            	console.log(data)
				//单个获值
				//var na = (data[0].name)
				//$(".panel").append(na);
				
				//遍历出来    格式：jQuery.each(object,[callback])
				$.each(data,function(i,item){ 
					thishtml+="姓名："+item["name"]+"<br>"; 			
					thishtml+="性别："+item["sex"]+"<br>"; 
					thishtml+="邮箱："+item["email"]+"<br>";  //strHtml反复拿值做字符串拼接
					alert(thishtml)
					thishtml+="<hr>" 
				}) 
				//塞到页面的dom中
				$(".panel").html(thishtml);
            },error:function(){ 
					alert("error!"); 
			}
        })
    })
})
</script>

data_list.html-上面的ajax取的数据源， 其实就是一个空白的html，里面放的json

[ 
	{ 
	"name":"张国立","sex":"男","email":"zhangguoli@123.com" 
	},{ 
	"name":"张铁林","email":"zhangtieli@123.com" 
	},{ 
	"name":"邓婕","sex":"女","email":"zhenjie@123.com" 
	} 
]

主页面html

<input type="button" name="" id="btn" value="加载" />
<div class="panel">
</div>