Springvalidation器：同时具有注释和validation器实现
是否可以同时为表单和注释约束提供validation器？
例如，在表单对象中包含此字段：
@NotEmpty private String date; 但然后在validation器中validation日期的模式。
我知道有模式注释，但我只是想看看我是否可以使用这两种类型的validation。
这是一个非常好的网站链接，它解释了如何将JSR-303validation器与弹簧validation器结合起来。
接下来我将介绍我的解决方案。 希望能帮助到你。
我的抽象确认者：
import java.util.Map; import java.util.Set; import javax.validation.ConstraintValidator; import javax.validation.ConstraintValidatorFactory; import javax.validation.ConstraintViolation; import javax.validation.Validator; import org.springframework.beans.BeansException; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.context.ApplicationContext; import org.springframework.context.ApplicationContextAware; import org.springframework.validation.Errors; public abstract class AbstractValidator implements org.springframework.validation.Validator, ApplicationContextAware, ConstraintValidatorFactory { @Autowired private Validator validator; private ApplicationContext applicationContext; public void setApplicationContext(ApplicationContext applicationContext) throws BeansException { this.applicationContext = applicationContext; } public > T getInstance(Class key) { Map beansByNames = applicationContext.getBeansOfType(key); if (beansByNames.isEmpty()) { try { return key.newInstance(); } catch (InstantiationException e) { throw new RuntimeException("Could not instantiate constraint validator class '" + key.getName() + "'", e); } catch (IllegalAccessException e) { throw new RuntimeException("Could not instantiate constraint validator class '" + key.getName() + "'", e); } } if (beansByNames.size() > 1) { throw new RuntimeException("Only one bean of type '" + key.getName() + "' is allowed in the application context"); } return (T) beansByNames.values().iterator().next(); } public boolean supports(Class c) { return true; } public void validate(Object objectForm, Errors errors) { Set> constraintViolations = validator.validate(objectForm); for (ConstraintViolation
}
一个实际的validation者：
import org.springframework.stereotype.Component; import org.springframework.validation.Errors; import ro.scorpionsoftware.demo3.dao.AbstractValidator; @Component(value="doctorValidator") public class DoctorValidator extends AbstractValidator { @Override protected void addExtraValidation(Object objectForm, Errors errors) { //perform typical validation //can autowire to context } }
控制器:(最后是@Valid与validation器的绑定）
@Controller public class DoctorEditController { @Autowired private DoctorValidator doctorValidator; @RequestMapping(value = "/doctorEdit", method = RequestMethod.POST) public String processSubmit( @ModelAttribute("doctorForm") @Valid DoctorForm df, BindingResult result, ModelMap model) { ... } @InitBinder protected void initBinder(WebDataBinder binder) { binder.setValidator(doctorValidator); } }
在上下文中声明JSR-303validation器：
使用此方法，您可以在实际validation器和您要实现的任何其他自定义注释中获取上下文。
您可以将注释组合在一起以使用多个validation器，因此它将是这样的。
@NotEmpty @Pattern("") // not sure of syntax here @Target(ElementType.METHOD) @Retention( RetentionPolicy.RUNTIME) @Constraint(validatedBy = {}) @Documented public @interface DatePattern { String message() default ""; Class[] groups() default {}; Class[] payload() default {}; }