Spring mvc Spring MVC-无法@Autowire messageSource

我有一个自定义的异常类，需要从属性文件中读取一些错误消息。但它似乎一直在变为空。我甚至尝试添加@Component，但仍然不起作用

@Component
public class FormValidationFailExceptionHolder {

    @Autowired
    private MessageSource messageSource;

    ...
    public void someMethod(){
        ....
        String message = messageSource.getMessage(errorid, msgargs, Locale.ENGLISH);
        ....
    }
}

这是我的spring配置

....
<context:component-scan base-package="simptex.my" />
....
 <bean id="messageSource" class="org.springframework.context.support.ReloadableResourceBundleMessageSource">
    <property name="useCodeAsDefaultMessage" value="false" />
    <property name="basenames">
        <list>
            <value>classpath:mgmtlabels</value>
            <value>classpath:error</value>
            <value>classpath:PWMResources</value>
        </list>
    </property>
    <property name="defaultEncoding" value="UTF-8" />
</bean>

---

据我所知，您真正想要实现的是自定义表单验证器

@Component
public class CustomValidator implements Validator {

    @Override
    public boolean supports(Class<?> clazz) {
        return clazz == FormBean.class;
    }

    @Override
    public void validate(Object target, Errors errors) {
        FormBean bean = (FormBean) target;

        if ( StringUtils.isEmpty( bean.getField() ) ) {
            errors.rejectValue("field", "field.empty");
        }

    }
}

现在，您需要在控制器中添加：

@Autowired
private CustomValidator customValidator; 

@InitBinder
protected void initBinder(WebDataBinder binder) {
    if (binder.getTarget() instanceof FormBean) {
        binder.setValidator(customValidator);
    }
}

@RequestMapping(value = "/xxxx", method = RequestMethod.POST)
    public String fooMethodxxx(@ModelAttribute("bean") @Validated FormBean bean, BindingResult result) {
        if ( result.hasErrors() ) {
            prepareModel(model);
            return "form.view";
        }
        return "other.view"
    }

<%@ taglib prefix="f" uri="http://www.springframework.org/tags/form"%>

<f:errors cssClass="error" path="field"></f:errors>
<f:input path="field" type="text"/>

当您发布表单时，它将被验证。要在jsp中向用户显示验证消息，您需要添加：

@Autowired
private CustomValidator customValidator; 

@InitBinder
protected void initBinder(WebDataBinder binder) {
    if (binder.getTarget() instanceof FormBean) {
        binder.setValidator(customValidator);
    }
}

@RequestMapping(value = "/xxxx", method = RequestMethod.POST)
    public String fooMethodxxx(@ModelAttribute("bean") @Validated FormBean bean, BindingResult result) {
        if ( result.hasErrors() ) {
            prepareModel(model);
            return "form.view";
        }
        return "other.view"
    }

<%@ taglib prefix="f" uri="http://www.springframework.org/tags/form"%>

<f:errors cssClass="error" path="field"></f:errors>
<f:input path="field" type="text"/>

---

我认为这是处理自定义验证器的正确方法。

谢谢。。我最终使用了“经典”的方式获得标签。拥有一个使用

ResourceBundleMessageSource

vincent的应用程序-您能否分享您是如何解决此问题的。我无法在自定义AuthenticationEntryPoint中自动连接MessageSource（ResourceBundleMessageSource）

@Component
public class CustomValidator implements Validator {

    @Override
    public boolean supports(Class<?> clazz) {
        return clazz == FormBean.class;
    }

    @Override
    public void validate(Object target, Errors errors) {
        FormBean bean = (FormBean) target;

        if ( StringUtils.isEmpty( bean.getField() ) ) {
            errors.rejectValue("field", "field.empty");
        }

    }
}