用途:跨域、拦截器、静态资源处理
接口方法的作用:
addInterceptors:拦截器
addViewControllers:页面跳转
addResourceHandlers:静态资源
configureDefaultServletHandling:默认静态资源处理器
configureViewResolvers:视图解析器
configureContentNegotiation:配置内容裁决的一些参数
addCorsMappings:跨域
configureMessageConverters:信息转换器
在Spring Boot 1.5版本都是靠重写WebMvcConfigurerAdapter的方法来添加自定义拦截器,消息转换器等。SpringBoot 2.0 后,该类被标记为@Deprecated(弃用)。官方推荐直接实现WebMvcConfigurer或者直接继承WebMvcConfigurationSupport,方式一实现 WebMvcConfigurer接口(推荐),方式二继承WebMvcConfigurationSupport类,具体实现可看这篇文章。
package com.gblfy.config;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.CorsRegistry;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
/**
* WebMvcConfigurer
*
*/
@Configuration
@EnableWebMvc
public class ConfigurerAdapter implements WebMvcConfigurer {
//图片保存路径
public static final String PIC_PATH = "/landscape/";
@Value(value="${application.profile}")
private String profile; @Autowired private AuthorityInterceptor authorityInterceptor;
//跨域
@Override
public void addCorsMappings(CorsRegistry registry) {
registry.addMapping("/**")
.allowCredentials(true)
.allowedHeaders("*")
.allowedOrigins("*")
.allowedMethods("GET","POST","PUT","DELETE");
}
// 可解决Long 类型在 前端精度丢失的问题, 如不想全局 直接添加注解 @JsonSerialize(using= ToStringSerializer.class) 到相应的字段
@Override
public void addResourceHandlers(ResourceHandlerRegistry registry) {
registry.addResourceHandler("/**").addResourceLocations("classpath:/META-INF/resources/").setCachePeriod(0);
/** 图片传路径 */
registry.addResourceHandler("/landscape/**").addResourceLocations("file:" + profile);
}
@Override public void addInterceptors(InterceptorRegistry registry{ //注册自己的拦截器并设置拦截的请求路径 registry.addInterceptor(authorityInterceptor).addPathPatterns("/**"); super.addInterceptors(registry); }
}