Java超详细讲解WebMvcConfigurer拦截器

2022-11-13 10:11:59 拦截器 讲解 详细

WEBmvcConfigurer接口常用的方法：

 
void addInterceptors(InterceptorReGIStry var1);

void addViewControllers(ViewControllerRegistry registry);

void addResourceHandlers(ResourceHandlerRegistry registry);

void configureDefaultServletHandling(DefaultServletHandlerConfigurer configurer);

void configureViewResolvers(ViewResolverRegistry registry);

void configureContentNeGotiation(ContentNegotiationConfigurer configurer);

public void addCorsMappings(CorsRegistry registry) ;

addInterceptors拦截器

addInterceptor：需要一个实现HandlerInterceptor接口的拦截器实例

addPathPatterns：用于设置拦截器的过滤路径规则；addPathPatterns(“ @Override public void addResourceHandlers(ResourceHandlerRegistry registry) { registry.addResourceHandler("/my @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<HttpMessageConverter<?>> 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);
}

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