Integrate Bean Validation (JSR303) with Struts2 -- Configuration

Integrate Bean Validation (JSR303) with Struts2 -- Outline
有三個主要的設定，一是設定Validator instance，implementation可以使用Hibernate Validator；另一個是設定SpringValidationInterceptor和SpringI18nInterceptor，三者我們都交給Spring控管；最後在struts.xml中設定interceptor，並套用到Action就可以了。

Spring XML

<bean id="gmo.cao.validator" class="org.springframework.validation.beanvalidation.LocalValidatorFactoryBean" />

Spring Configuration

package com.gss.gmo.cao.struts2.spring;

import javax.validation.Validator;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import com.gss.gmo.cao.struts2.interceptor.SpringI18nInterceptor;
import com.gss.gmo.cao.struts2.interceptor.SpringValidationInterceptor;
import com.opensymphony.xwork2.interceptor.Interceptor;

@Configuration
public class InterceptorConfiguration {

    final static String EXCLUDE_METHODS = "input, back, cancel, browse";

    @Bean(name = "gmo.cao.springI18n")
    Interceptor getSpringI18nInterceptor() {
        return new SpringI18nInterceptor();
    }

    @Bean(name = "gmo.cao.springValidation")
    @Autowired
    Interceptor createSpringValidationInterceptor(@Qualifier("gmo.cao.validator") Validator validator) {
        SpringValidationInterceptor interceptor = new SpringValidationInterceptor();
        interceptor.setExcludeMethods(EXCLUDE_METHODS);
        interceptor.setValidator(validator);
        return interceptor;
    }

}

struts.xml

<interceptor name="springI18n" class="gmo.cao.springI18n" />
<interceptor name="springValidation" class="gmo.cao.springValidation" />