java Spring 3 验证不起作用
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Spring 3 validation not working
提问by ashishjmeshram
I have a user entity in my application which I need to validate.
我的应用程序中有一个需要验证的用户实体。
public class User {
private String userName;
private String password;
public void setUserName(String userName){
this.userName = userName;
}
public getUserName(){
return this.userName;
}
// and so on
}
}
For this I have created a UsersValidator like below.
为此，我创建了一个如下所示的 UsersValidator。
public class UserValidator implements Validator {
public boolean supports(Class clazz) {
return User.class.equals(clazz);
}
public void validate(Object obj, Errors errors) {
ValidationUtils.rejectIfEmptyOrWhitespace(errors, "userName", "field.required");
ValidationUtils.rejectIfEmptyOrWhitespace(errors, "password", "field.required");
}
}
and I have a controller like this
我有一个这样的控制器
@RequestMapping(value = "/login", method = RequestMethod.POST)
public String home(@Valid User user,
BindingResult result) {
if (result.hasErrors()) {
return "loginForm";
} else {
//continue
}
}
The binding result does not have any errors.
绑定结果没有任何错误。
What else I need to do in order for the validation to work? Do I have make any changes in the controller or the spring configuration file.
我还需要做什么才能使验证生效？我是否对控制器或弹簧配置文件进行了任何更改。
<mvc:annotation-driven />
<context:component-scan base-package="com.myapp" />
<mvc:resources location="/resources/" mapping="/resources/**" />
<bean id="viewResolver"
class="org.springframework.web.servlet.view.UrlBasedViewResolver">
<property name="viewClass">
<value>org.springframework.web.servlet.view.tiles2.TilesView</value>
</property>
</bean>
<bean id="tilesConfigurer"
class="org.springframework.web.servlet.view.tiles2.TilesConfigurer">
<property name="definitions">
<list>
<value>/WEB-INF/tiles.xml</value>
</list>
</property>
</bean>
<bean id="messageSource"
class="org.springframework.context.support.ResourceBundleMessageSource">
<property name="basenames">
<list>
<value>com/dimex/resourceBundles/ApplicationResources</value>
<value>com/dimex/resourceBundles/errors</value>
</list>
</property>
</bean>
<mvc:interceptors>
<bean class="org.springframework.web.servlet.i18n.LocaleChangeInterceptor">
<property name="paramName" value="locale"></property>
</bean>
</mvc:interceptors>
<bean id="localeResolver"
class="org.springframework.web.servlet.i18n.SessionLocaleResolver">
<property name="defaultLocale" value="en" />
</bean>
EDIT:-
编辑：-
Do I need to have hibernate validator in my classpath. We are not using hibernate in our application. Please help.
我的类路径中是否需要有休眠验证器。我们没有在我们的应用程序中使用休眠。请帮忙。
EDIT2:-
编辑2：-
When I use validation annotations (@NotNull, @Size etc) directly in my entity class then @Valid annotations in controller works but if I remove them from my entities and try to use the validator written above then @Valid does not work.
当我直接在我的实体类中使用验证注释（@NotNull、@Size 等）时，控制器中的 @Valid 注释有效，但如果我从实体中删除它们并尝试使用上面编写的验证器，则 @Valid 不起作用。
Is it like that @Valid annotations only work with the validation annotation in the entities only and not with the validators? In order to use my validators will I have to invoke the validate method in my validator directly?
@Valid 注释是否仅适用于实体中的验证注释，而不适用于验证器？为了使用我的验证器，我是否必须直接在我的验证器中调用验证方法？
回答by Raghuram
From what I understand you are trying to combine JSR-303@Valid annotation with classic spring validation. Why would you want to do this? The equivalent JSR-303 annotations for UserValidatorclass would be something like below:
据我了解，您正在尝试将JSR-303@Valid 注释与经典的 spring 验证结合起来。你为什么想做这个？类的等效 JSR-303 注释UserValidator如下所示：
@NotNull
@Size(min=1)
private String userName;
@NotNull
@Size(min=1)
private String password
...
The spring documentationillustrates the steps needed to configure JSR-303 validation. You would need hibernate-validator(or another JSR-303 provider) for the above to work. You would also need to configure the validatorbean as below.
spring文档说明了配置 JSR-303 验证所需的步骤。您需要hibernate-validator（或其他 JSR-303 提供者）才能使上述工作正常进行。您还需要validator如下配置bean。
<bean id="validator"
class="org.springframework.validation.beanvalidation.LocalValidatorFactoryBean"/>
The other answers to this question are in the same line as well.
这个问题的其他答案也在同一条线上。
回答by Dave
You need to define the validator to use in your controller using the @InitBinder annotation, for example:
您需要使用 @InitBinder 批注定义要在控制器中使用的验证器，例如：
@InitBinder
protected void initBinder(WebDataBinder binder) {
binder.setValidator(new UserValidator());
}
回答by gskillz
Other way around is to call spring validator initialization from your controller
另一种方法是从您的控制器调用 spring 验证器初始化
DataBinder dataBinder = new DataBinder(user);
dataBinder.setValidator(userValidator);
dataBinder.validate();
BindingResult result = dataBinder.getBindingResult();
if(result.hasErrors() == false) {
// error exists
}
回答by user3591738
You need to put @Componenton the Validatorimplementation so that Spring container can recognize it as:
你需要把@Component上Validator，使Spring容器可以将其识别为实现：
@Component
public class UserValidator implements Validator {
and use following method in the controller:
并在控制器中使用以下方法：
@InitBinder(UserVO) protected void initBinder(WebDataBinder binder) { binder.setValidator(userValidator); }
@InitBinder(UserVO) protected void initBinder(WebDataBinder binder) { binder.setValidator(userValidator); }
回答by schiavuzzi
If you use JSR-303-style validation with Spring (i.e. a global Validator instance provided by a JSR-303 implementation, such as Hibernate Validator), andyou have an @InitBinder-annotated method in your Controller, you mustinject the Validatorinto your Controller andset it in the @InitBindermethod:
如果您使用JSR-303风格的验证与春季（即由JSR-303实现，如Hibernate验证提供了一个全球性的验证实例），和你有一个@InitBinder在你的-annotated方法Controller，你必须注入Validator到你的控制器和集它在@InitBinder方法中：
@Autowired
public void setValidator(Validator validator) {
this.validator = validator;
}
@InitBinder
protected void initBinder(WebDataBinder binder) {
binder.setValidator(this.validator);
}
The WebDataBinder's validator is by default set to null, not (as you would expect) to the global JSR-303 Validator instance, so your models won't be validated by Spring unless you set the Validator instancemanually here.
该WebDataBinder的验证是默认设置为null，并非（如你所期望的）全球JSR-303的校验器实例，所以你的车型将不会被春天验证，除非您设置的验证实例手动这里。
This is only if you have an @InitBindermethod. If you don't, everything works as expected.
只有当你有一个@InitBinder方法时才会这样做。如果不这样做，一切都会按预期进行。
