我正在使用Spring MVC开发WebApp。问题是我在我的控制器的POST方法中使用@ModelAttribute传递的模型似乎是空的,尽管我已在网页上填写了表单。
这是我的控制器的GET方法:
@RequestMapping(value = "/CircleUp", method = RequestMethod.GET)
public ModelAndView circleUpGet(Model _model) {
ModelAndView modelAndView = new ModelAndView("CircleUp");
CircleUpModel circleUpModel = new CircleUpModel();
_model.addAttribute("circleUpModel", circleUpModel);
return modelAndView;
}
这是我的控制器的POST方法:
@RequestMapping(value = "/CircleUp", method = RequestMethod.POST)
public ModelAndView circleUpPost(HttpServletRequest _request, Model _model, @ModelAttribute("circleUpModel") CircleUpModel _circleUpModel) {
return this.doCircleUp(_request, _model, _circleUpModel);
}
这里“_circleUpModel”没有任何值。
这是我在相关的.jsp文件中的表单,其中包含所需的脚本:
<form:form method="post" modelAttribute="circleUpModel" id="circle_form" action="" enctype="multipart/form-data" >
<form:input path="file" id="upload" type="file" />
<form:checkbox path="mergeSameTickmarks" checked="true" />
<form:checkbox path="deleteHighlights" checked="true" />
<form:checkbox path="generateFigureLog" checked="true" />
...
<input type="button" onclick="javascript:submitForm()"
value="Start Circle Up">
function submitForm() {
if (checkIfPdf() && checkSettings()) {
$("#circle_form").submit()
setTimeout(progress, 100);
}
}
当然会显示CircleUpModel的默认值,但是如果我以网页的形式输入其他一些值,那么在POST方法中不会考虑这个值,尽管我在表单中添加了modelAttribute="circleUpForm"
。
CircleUpModel:
import org.pdfclown.files.File;
public class CircleUpModel {
// File
private File file;
// FileName
private String fileName;
private boolean mergeSameTickmarks;
private boolean deleteHighlights;
private boolean generateFigureLog;
// Settings
private double circleBorderWidth;
private double customizeCircleUp;
private double customizeCircleDown;
private double gapLeft;
private double gapRight;
private double maxGap;
private boolean tickmarkAlwaysUpperCase;
public File getFile() {
return file;
}
public void setFile(File file) {
this.file = file;
}
public String getFileName() {
return fileName;
}
public void setFileName(String fileName) {
this.fileName = fileName;
}
public boolean isMergeSameTickmarks() {
return mergeSameTickmarks;
}
public void setMergeSameTickmarks(boolean mergeSameTickmarks) {
this.mergeSameTickmarks = mergeSameTickmarks;
}
public boolean isDeleteHighlights() {
return deleteHighlights;
}
public void setDeleteHighlights(boolean deleteHighlights) {
this.deleteHighlights = deleteHighlights;
}
public boolean isGenerateFigureLog() {
return generateFigureLog;
}
public void setGenerateFigureLog(boolean generateFigureLog) {
this.generateFigureLog = generateFigureLog;
}
public double getCircleBorderWidth() {
return circleBorderWidth;
}
public void setCircleBorderWidth(double circleBorderWidth) {
this.circleBorderWidth = circleBorderWidth;
}
public double getCustomizeCircleUp() {
return customizeCircleUp;
}
public void setCustomizeCircleUp(double customizeCircleUp) {
this.customizeCircleUp = customizeCircleUp;
}
public double getCustomizeCircleDown() {
return customizeCircleDown;
}
public void setCustomizeCircleDown(double customizeCircleDown) {
this.customizeCircleDown = customizeCircleDown;
}
public boolean isTickmarkAlwaysUpperCase() {
return tickmarkAlwaysUpperCase;
}
public void setTickmarkAlwaysUpperCase(boolean tickmarkAlwaysUpperCase) {
this.tickmarkAlwaysUpperCase = tickmarkAlwaysUpperCase;
}
public double getGapLeft() {
return gapLeft;
}
public void setGapLeft(double gapLeft) {
this.gapLeft = gapLeft;
}
public double getGapRight() {
return gapRight;
}
public void setGapRight(double gapRight) {
this.gapRight = gapRight;
}
public double getMaxGap() {
return maxGap;
}
public void setMaxGap(double maxGap) {
this.maxGap = maxGap;
}
}
答案 0 :(得分:0)
如果删除文件上传内容,您将能够看到模型中的数据。但是如果你想进行文件上传,你必须按如下方式调整你的代码。
其次,替换JSP中的以下标记
<form:input path="file" id="upload" type="file" />
带有简单的HTML标记。
<input name="file" type="file"/>
在控制器中修改POST方法的签名,如下所示。
public ModelAndView circleUpPost(HttpServletRequest _request, @ModelAttribute("circleUpModel") CircleUpModel _circleUpModel, @RequestParam("file") MultipartFile _file) {
//do your processing
}
这里是最后一个参数&#39; _file&#39;是 MultipartFile 类型,包含您从JSP上传的文件。
最后也是最重要的一步是在Spring配置文件中注册一个多部分解析器。
<beans:bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
<beans:property name="maxUploadSize" value="100000" />
</beans:bean>
希望这有帮助。
答案 1 :(得分:0)
可以通过更改模型中文件的类型来解决此问题。
以前它是一个pdfclown文件,现在我已将其更改为MultipartFile。 在我的POST方法中,我已将文件从MultipartFile转换为pdfclown文件,以便能够像以前一样使用它。