Springboot配置接口WebMvcConfigurer使用

WebMvcConfigurer配置类其实是Spring内部的一种配置方式，采用JavaBean的形式来代替传统的xml配置文件形式进行针对框架个性化定制。只需实现相关方法，可以自定义一些Handler，Interceptor，ViewResolver，MessageConverter。

拦截器主要用途：进行用户登录状态的拦截，日志的拦截等。

@Override
public void addInterceptors(InterceptorRegistry registry) {
    super.addInterceptors(registry);               //调用父类此方法
    registry.addInterceptor(new TestInterceptor()) //添加拦截器实例
            .addPathPatterns("
@Bean
public InternalResourceViewResolver resourceViewResolver() {
	InternalResourceViewResolver internalResourceViewResolver = new InternalResourceViewResolver();
	//请求视图文件的前缀地址
	internalResourceViewResolver.setPrefix("/WEB-INF/jsp/");
	//请求视图文件的后缀
	internalResourceViewResolver.setSuffix(".jsp");
	return internalResourceViewResolver;
}
 

@Override
public void configureViewResolvers(ViewResolverRegistry registry) {
	super.configureViewResolvers(registry);
	registry.viewResolver(resourceViewResolver());
	
}

addCorsMappings：跨域

@Override
public void addCorsMappings(CorsRegistry registry) {
    super.addCorsMappings(registry);        
    registry.addMapping("/cors
@Override
public void configureMessageConverters(List> converters) {
    //调用父类的配置
    super.configureMessageConverters(converters);
    //创建fastJson消息转换器
    FastJsonHttpMessageConverter fastConverter = new FastJsonHttpMessageConverter();
    //创建配置类
    FastJsonConfig fastJsonConfig = new FastJsonConfig();
    //修改配置返回内容的过滤
    fastJsonConfig.setSerializerFeatures(
            SerializerFeature.DisableCircularReferenceDetect,
            SerializerFeature.WriteMapNullValue,
            SerializerFeature.WriteNullStringAsEmpty
    );
    fastConverter.setFastJsonConfig(fastJsonConfig);
    //将fastjson添加到视图消息转换器列表内
    converters.add(fastConverter);
 
}