jquery ajax 文件上传(input type=file)

PHP代码,例如:
<input type="file" name="photo" id="photo" value="" style="width:100px;height:30px;" />
<input type="button" onclick="postData2();" value="下一步" name="" style="width:100px;height:30px;" />

script代码,例如:
<script type="text/javascript">
    localStorage.setItem("token",'e7e6238fde352eeb0aba417df305c497');//储存名称为“key”的值
    var token = localStorage.getItem("token");//获取名称为“key”的值
    function postData2(){
        var formData = new FormData();
        //接口接收参数 键值形式 添加到formData中
        formData.append("photo",$("#photo")[0].files[0]);
        formData.append("service",'App.Bel-Ami.Info');
        formData.append("token",token);
        $.ajax({
            url:'http://baidu.com/',//url地址
            type:'post',
            data: formData,
            contentType: false,
            processData: false,
            success:function(res){
                console.log(res.data);
                if(res.data["code"]=="succ"){
                    alert('成功');
                }else if(res.data["code"]=="err"){
                    alert('失败');
                }else{
                    console.log(res);
                }
            }
        })
    }
</script>

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转载自blog.csdn.net/Bel_Ami_n/article/details/82219351