ajax上传图片

Posted 2021-03-22 lazyli

页面：

<div class="ml_labelOne">
    <div class="ml_label_text mustWrite" style="width:125px;float: left;line-height:34px;">
        照片：
    </div>
    <div class="ml_label_input1 about_img">
        <div class="upload_img" style="margin-left: 24px">

        </div>
        <div class="file">
            <input class="img_file" type="file">
        </div>
    </div>
</div>
js:
var fileObj = document.getElementById("FileUpload").files[0]; // js 获取文件对象

$("body").on(‘change‘, ".img_file", function (e) {
            var file = this.files[0];
            now = $(this);
            if (window.FileReader) {
                var formFile = new FormData();
                formFile.append("action", "UploadVMKImagePath");
                formFile.append("file", file); //加入文件对象
                console.log(ctxPath);
                console.log(file);
                $.ajax({
                    type: "POST",
                    url: ctxPath + "supplier/add", //上传路径
                    data: formFile,
                    cache: false,
                    contentType: false,    //不可缺
                    processData: false,
                    dataType: "json",
                    success: function (ret) {
                        console.log(ret);
                    },
                    error: function (XMLHttpRequest, textStatus, errorThrown) {
                        alert("上传失败，请检查网络后重试");
                    }
                });
                var reader = new FileReader();
                reader.readAsDataURL(file);
                //console.log($(this, "p++++++++++fnnf"))
                //监听文件读取结束后事件    
                $(this).parents(".about_img").find(".upload_img").append(‘<div class="upload_photo"><img class="photo" src=""><div class="delete_img">删除</div></div>‘)
            }
            reader.onloadend = function (e) {
                console.log("hldflkdjfldj");
                console.log($(this));

                now.parents(".about_img").find(".photo:last").attr("src", e.target.result);    //e.target.result就是最后的路径地址
            };
        });

　　后台接收：

@Controller
@RequestMapping("/supplier")
public class PartSupplierAction {


    @RequestMapping("/add")
    @ResponseBody
    public Map<String,Object> add(@RequestParam("file") MultipartFile file){
        Map<String,Object> map = new HashMap<>();
        System.out.println(file.getOriginalFilename());
        map.put("status",200 );
        return map;
    }

}