modelattribute | 易学教程

Spring Form: select bean according to params

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问题 I've got a question concerning Spring forms (with Thymeleaf, to be specific). I know that I can use only one bean at a time to back a form in Spring, so I thought it would be nice to let the Controller select which bean should be bound to the form,depending on which parameters are sent. But instead of writing a new RequestMapping for every new param, I wondered if I could somehow map the params only to the ModelAttribute itself. I thought of something like this: @Controller public class

Multiple modelattributes in a JSP with Spring

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问题 What I am trying to accomplish is using one single form, submit multiple modelattributes with Spring and JSP. With one I know how to do it, mapping the model with the tag form:form . But, if I want to get two modelAttributes in the controller method with the annotations @ModelAttribute how should I do it? Is it even possible? I am aware this is not so common, but I would like to know if it is possible. 回答1: AFAIK, you can only bind a form with a single object. If you have two classes, then

Spring Framework - Multiple ModelAttributes of Same Type

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问题 I am working on a checkout page that requires a shipping address and a billing address. This integrates with a third-party library which has these both implemented as the same type: Address. What I need to be able to do is something like: @RequestMapping(method = RequestMethod.POST) @ResponseBody public Response createOrder( @ModelAttribute("customer") Customer customer, @ModelAttribute("shipping") Address shippingAddress, @ModelAttribute("payment") Payment paymentInformation, @ModelAttribute

Array @ModelAttribute expansion in Spring MVC

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*Edit: I may have to use a list but the same principle applies. I'm attempting to bind an array to a form using the @ModelAttribute annotation. A table is populated with the contents of the array (each element in the array corresponds to a row in the table). The array may be populated with data or may be empty when it's bound. The user can add rows to the table (which should add elements to the array). My question is how can elements be added to the array if it's already defined before I pass it in? Will this automagically happen when the form is submitted? <body> <h1>Members</h1> <form:form

Can ModelAttribute be primitive?

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问题 I am having a strange problem with ModelAttribute in Spring MVC 3.0. When I deploy the app at localhost, it works fine. But when I deploy the app on a remote server, it fails everytime user access a specific action, with the errors: ERROR: my.package.application.web.filter.ExceptionFilter - long.<init>() java.lang.NoSuchMethodException: long.<init>() at java.lang.Class.getConstructor0(Class.java:2706) at java.lang.Class.getDeclaredConstructor(Class.java:1985) at org.springframework.beans

Spring MVC ModelAttribute Fields Are Null Instead of Form Input Values

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问题 I'm trying to make a form that will post a CardRequestResource: public class CardRequestResource extends ResourceSupport{ private Long cardRequestId; private String deliveryMethod; private String address; private boolean isHomeDelivery; private String requestDate; private String expectedDate; private String comments; private Long statusId; private PersonResource person; //Getters and Setters } In my controller, I first load the JSP and add an empty CardRequestResource to the ModelMap:

Spring : binding object with and without @ModelAttribute

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问题 I am new in Spring and registering a user.I did like this. @RequestMapping("/register") public String register(@ModelAttribute User user,BindingResult result){ if(!result.hasErrors()){ userSerive.register(user); } return "welcome"; } This worked fine,but problem here is I don't need this user object in my welcome.jsp page,so why make model object heavier.So I tried without @ModelAttribute , this also works for me like below. @RequestMapping("/register") public String register(User user

Can ModelAttribute be primitive?

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I am having a strange problem with ModelAttribute in Spring MVC 3.0. When I deploy the app at localhost, it works fine. But when I deploy the app on a remote server, it fails everytime user access a specific action, with the errors: ERROR: my.package.application.web.filter.ExceptionFilter - long.<init>() java.lang.NoSuchMethodException: long.<init>() at java.lang.Class.getConstructor0(Class.java:2706) at java.lang.Class.getDeclaredConstructor(Class.java:1985) at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:104) at org.springframework.web.bind.annotation.support

Spring MVC ModelAttribute Fields Are Null Instead of Form Input Values

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I'm trying to make a form that will post a CardRequestResource: public class CardRequestResource extends ResourceSupport{ private Long cardRequestId; private String deliveryMethod; private String address; private boolean isHomeDelivery; private String requestDate; private String expectedDate; private String comments; private Long statusId; private PersonResource person; //Getters and Setters } In my controller, I first load the JSP and add an empty CardRequestResource to the ModelMap: @RequestMapping(value = { "", "/approval" }, method = RequestMethod.GET) public String getApproval(ModelMap

Spring form ModelAttribute field validation to avoid 400 Bad Request Error

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I've got an ArticleFormModel containing data sent by normal html form which is injected by Spring using @ModelAttribute annotation, i.e. @RequestMapping(value="edit", method=RequestMethod.POST) public ModelAndView acceptEdit(@ModelAttribute ArticleFormModel model, HttpServletRequest request, BindingResult errors) { //irrelevant stuff } Everything works perfectly fine up to some point. The problem is that the ArticleFormModel contains a double field ( protected , set using normal setter). Everything works fine as long as data sent by user is a number. When they type a word, all I get is 400 Bad