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我正在开发一个 Spring MVC 应用程序并且在验证时遇到了问题。我需要创建一个用户，这是一个 2 步过程（意味着 2 个具有相同控制器的 jsps）。jsps 有 2 个不同的命令名。因此，当我为第一个模型创建验证器并对其进行初始化时，第一页加载正常。对于测试，我没有使用 if 条件，而是转发到下一页。当控制器尝试使用当前的 commandName 对象加载验证器时出现错误，但它失败了。

当我输入 url http://ip:port/data时，页面加载，因为没有验证，它只是初始加载当我尝试提交页面而不输入 firstName 并提交时，方法 @RequestMapping(value = "/user") 被调用，并且应该加载下一页 2。但是第2页失败了。

binder.getTarget() prints UserData the first time which is right
binder.getTarget() prints userinfo the 2nd time, when the next page is loading and it fails with the error

堆栈跟踪：

HTTP Status 500 - Request processing failed; nested exception is java.lang.IllegalStateException: Invalid target for Validator [.validator.UserDataValidator@4366febc]: .model.UserInfo@4e3a061b

type Exception report

message Request processing failed; nested exception is java.lang.IllegalStateException: Invalid target for Validator [.validator.UserDataValidator@4366febc]: .model.UserInfo@4e3a061b

description The server encountered an internal error that prevented it from fulfilling this request.

exception

org.springframework.web.util.NestedServletException: Request processing failed; nested exception is java.lang.IllegalStateException: Invalid target for Validator [.validator.UserDataValidator@4366febc]: .model.UserInfo@4e3a061b
    org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:978)
    org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:868)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:648)
    org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:842)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
    org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
    org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:77)
    org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
    org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:85)
    org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)

root cause

java.lang.IllegalStateException: Invalid target for Validator [.validator.UserDataValidator@4366febc]: .model.UserInfo@4e3a061b
    org.springframework.validation.DataBinder.assertValidators(DataBinder.java:516)
    org.springframework.validation.DataBinder.setValidator(DataBinder.java:507)
    .controller.AccountDataController.initBinder(AccountDataController.java:65)
    sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    java.lang.reflect.Method.invoke(Method.java:606)
    org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:221)
    org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:137)
    org.springframework.web.method.annotation.InitBinderDataBinderFactory.initBinder(InitBinderDataBinderFactory.java:62)
    org.springframework.web.bind.support.DefaultDataBinderFactory.createBinder(DefaultDataBinderFactory.java:53)
    org.springframework.web.method.annotation.ModelFactory.updateBindingResult(ModelFactory.java:251)

有关如何处理此问题的任何建议都会有所帮助。有没有办法使这项工作 - 拥有 2 个不同的 commandNames 并尝试使用一个控制器进行验证，或者我是否需要将 commandName 更新为一个对象，并且该对象包含其中的所有类。

e.g.

class Parent{
 UserData UserData;
 UserInfo userInfo;

 getter & setter
}

我的控制器：

@Controller
@SessionAttributes("userData")
public class AController {

    @Autowired
    @Qualifier("userDataValidator")
    private Validator validator;

    @InitBinder
    private void initBinder(WebDataBinder binder) {

        System.out.println("getTarget: "+binder.getTarget()); ------------ 
        binder.setValidator(validator);
    }

    @RequestMapping(value = "/data", method = RequestMethod.GET)
    public String initForm(Model model){

        UserData userData = new UserData();
        model.addAttribute("userData", userData);
        return "page1";

    }//

    @RequestMapping(value = "/user", method=RequestMethod.POST )
    public String details(Model model, @Validated UserData userData, BindingResult result) {
        *****
        model.addAttribute("userinfo", userinfo);
        return "page2";

    }//
    **EDIT**
    @RequestMapping(value = "/create", method=RequestMethod.POST )
*****************
public String create(Model model, Userinfo userinfo, UserData userData) {

*********************user creation
}
**EDIT**
}

我的 JSP

page1.jsp

<form:form method="POST" action="user" commandName="userData">
    <form:label path="firstName"><b>Name</b></form:label> <br />
    <form:input class="formLabel" path="firstName" />
    ****
</form>

page2.jsp

 <form:form method="POST" action="create" commandName="userinfo">
 ***********fields
 </form>

我的验证器

public class UserDataValidator  implements Validator{

    public boolean supports(Class<?> paramClass) {
        return UserData.class.equals(paramClass);

    }

    public void validate(Object obj, Errors errors) {
        ValidationUtils.rejectIfEmptyOrWhitespace(errors, "firstName", "valid.firstName");

    }

}

我的模特

UserData.java

public class UserData {

    String firstName;

    getter & setter for firstName

}

让我知道是否需要更多详细信息。谢谢。

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0 回答 0