How to get form data in controller when the form that was submitted has the attribute enctype="multipart/form-data"?
Question
I am having some trouble getting form data in my controller when the form in my jsp contains the attribute enctype="multipart/form-data" . The attribute is needed because i am uploading a file. I simplified my code to make it easier to understand but assume I have the following.
My model:
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
}
My controller is
@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.
}
}
updateEmployee.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>
When I submit my form and check the value of form.getInfo().getStreetName() and form.getInfo().getImage() within submit() in my controller, both values are null.
However if I remove method="post" enctype="multipart/form-data" from my form in jsp and also remove <form:input type="file" path="info.image"/> from my jsp and then proceed to submit, if I do form.getyInfo().getStreetName() it returns the value I filled in.
How do I get form data in my controller when the form in my jsp has the attribute method="post" enctype="multipart/form-data"??
1 answers
solution1
0 2021-11-08 18:06:49
A resolver was missing. Adding
<bean id="multipartResolver"
class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
</bean>
fixed the issue.
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