当jsp中的表单包含属性enctype=“multipart/formdata”时，我在控制器中获取表单数据时遇到了一些问题。该属性是必需的，因为我正在上载文件。我简化了代码以使其更易于理解，但假设我有以下内容。
我的型号：
public class EmployeeUpdateForm {
private String name;
private ContactInfo info;
//standard getters and setters
}
public class ContactInfo {
private String streetName;
private MultipartFile image;
//standard getters and setters
}
我的控制器是
@Controller
public class EmployeeController {
@RequestMapping(value = "/employee", method = RequestMethod.GET)
public ModelAndView showForm() {
//assume this sends you to updateEmployee.jsp
}
@RequestMapping(value = "/submit", method = RequestMethod.POST)
public String submit(@ModelAttribute("EmployeeUpdateForm")EmployeeUpdateForm form ) {
//here I expect form.getInfo().getStreetName() and form.getInfo().getImage() to return something but they are both null values.
}
}
更新员工.jsp
<%@ taglib prefix="form" uri="http://www.springframework.org/tags/form"%>
<html>
<head>
</head>
<body>
<h3>Update Employee Details</h3>
<form:form action="submit" method="post" enctype="multipart/form-data" id="EmployeeUpdateForm" modelAttribute="EmployeeUpdateForm">
<div>
Street Name: <form:input path="info.streetName" />
</div>
<div>
New Image: <form:input type="file" path="info.image"/>
</div>
</form:form>
</body>
</html>
当我提交表单并检查form.getInfo()的值时。getStreetName()和form.getInfo()。我的控制器中submit()内的getImage()，两个值都是null。
但是，如果我从 jsp 中的表单中删除方法=“post” enctype=“multipart/form-data” 并删除
当jsp中的表单具有属性method = " post " enctype = " multipart/form-data "时，如何在控制器中获取表单数据？？
缺少一个解析程序。加
<bean id="multipartResolver"
class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
</bean>
解决了这个问题。
