java - Ajax 表单提交和文件上传不起作用 Spring MVC

Question

Ajax 代码:

var str = $("#observationForm").serialize();

    $.ajax({
        type : "post",
        data : str,
        url : "updateObservation",
        async : true,
/* dataType : "multipart/form-data", */
        success : function() {
            alert("success");
        }
    });

JSP-Spring 表单:

<form:form modelAttribute="ObservationModal" action="updateObservation" id="observationForm">
    <label class="control-label">Tooth No</label>
    <input type="text" class="form-control" name="tooth" id="tooth" placeholder="Enter tooth no" />
    <label class="control-label">Uploaded file(PDF)</label>
    <input type="file" class="form-control" name="attachment" value="" id="attachment" placeholder="" />        
    <input type="button" value="Save" onclick="updateObservation();" />
</form:form>

Controller 类

@RequestMapping(value = "/updateObservation", method = RequestMethod.POST)
public @ResponseBody String updateObservation(
        @ModelAttribute("ObservationModal") ObservationModal formObj) {
    String result = "";

    System.out.println(":" + formObj.getTooth());
    System.out.println(formObj.getAttachment());

    return result;
}

模态类

public class ObservationModal implements Serializable {
    int tooth;
    private List<MultipartFile> attachment;

    public int getTooth() {
        return tooth;
    }

    public void setTooth(int tooth) {
        this.tooth = tooth;
    }

    public List<MultipartFile> getAttachment() {
        return attachment;
    }

    public void setAttachment(List<MultipartFile> attachment) {
        this.attachment = attachment;
    }

}

我无法获取 Controller 中的值文本框值或附件。 ObservationModal 始终为 null

Answer 1

要进行 ajax 调用，url 类型必须为“/projectName/actualurl”。在您的情况下，网址:'/projectName/updateObservation'。并将 dataType:'text' 添加到调用中。