下载地址：https://download.csdn.net/download/zhuhaoyu6666/12066064

package org.springframework.web.servlet.config.annotation;
import java.util.List;
import org.springframework.format.FormatterRegistry;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.lang.Nullable;
import org.springframework.validation.MessageCodesResolver;
import org.springframework.validation.Validator;
import org.springframework.web.method.support.HandlerMethodArgumentResolver;
import org.springframework.web.method.support.HandlerMethodReturnValueHandler;
import org.springframework.web.servlet.HandlerExceptionResolver;

public interface WebMvcConfigurer {
    default void configurePathMatch(PathMatchConfigurer configurer) {
    }

    default void configureContentNegotiation(ContentNegotiationConfigurer configurer) {
    }

    default void configureAsyncSupport(AsyncSupportConfigurer configurer) {
    }

    default void configureDefaultServletHandling(DefaultServletHandlerConfigurer configurer) {
    }

    default void addFormatters(FormatterRegistry registry) {
    }

    default void addInterceptors(InterceptorRegistry registry) {
    }

    default void addResourceHandlers(ResourceHandlerRegistry registry) {
    }

    default void addCorsMappings(CorsRegistry registry) {
    }

    default void addViewControllers(ViewControllerRegistry registry) {
    }

    default void configureViewResolvers(ViewResolverRegistry registry) {
    }

    default void addArgumentResolvers(List<HandlerMethodArgumentResolver> resolvers) {
    }

    default void addReturnValueHandlers(List<HandlerMethodReturnValueHandler> handlers) {
    }

    default void configureMessageConverters(List<HttpMessageConverter<?>> converters) {
    }

    default void extendMessageConverters(List<HttpMessageConverter<?>> converters) {
    }

    default void configureHandlerExceptionResolvers(List<HandlerExceptionResolver> resolvers) {
    }

    default void extendHandlerExceptionResolvers(List<HandlerExceptionResolver> resolvers) {
    }

    @Nullable
    default Validator getValidator() {
        return null;
    }

    @Nullable
    default MessageCodesResolver getMessageCodesResolver() {
        return null;
    }
}

 

1. configurePathMatch：请求path匹配

1. setUseSuffixPatternMatch : 设置是否是后缀模式匹配，如“/user”是否匹配/user.*，默认为true

2>setUseTrailingSlashMatch : 设置是否自动后缀路径模式匹配，如“/user”是否匹配“/user/”，默认为true

@Override

public void configurePathMatch(PathMatchConfigurer configurer) {

    /*

     * 1.ServletMappings 设置的是 "/" 

     * 2.setUseSuffixPatternMatch默认设置为true,

     * 那么,"/user" 就会匹配 "/user.*",也就是说,"/user.html" 的请求会被 "/user" 的 Controller所拦截.

     * 3.如果该值为false,则不匹配

     */

    configurer.setUseSuffixPatternMatch(false);



    /*

     * setUseTrailingSlashMatch的默认值为true

     * 也就是说, "/user" 和 "/user/" 都会匹配到 "/user"的Controller

     */

    configurer.setUseTrailingSlashMatch(true);

}

1. configureContentNegotiation内容裁决配置

@Override

public void configureContentNegotiation(ContentNegotiationConfigurer configurer) {

    

    /* 是否通过请求Url的扩展名来决定media type */

    configurer.favorPathExtension(true)

            /* 不检查Accept请求头 */

            .ignoreAcceptHeader(true)

            .parameterName("mediaType")

            /* 设置默认的media type */

            .defaultContentType(MediaType.TEXT_HTML)

            /* 请求以.html结尾的会被当成MediaType.TEXT_HTML*/

            .mediaType("html", MediaType.TEXT_HTML)

            /* 请求以.json结尾的会被当成MediaType.APPLICATION_JSON*/

            .mediaType("json", MediaType.APPLICATION_JSON);

}

1. configureAsyncSupport 异步处理的配置

处理异步请求的。只能设置两个值，一个超时时间（毫秒，Tomcat下默认是10000毫秒，即10秒），还有一个是AsyncTaskExecutor，异步任务执行器。

 

@Override

public void configureAsyncSupport(AsyncSupportConfigurer configurer) {

    ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();

    executor.setMaxPoolSize(10);

    configurer.setTaskExecutor(executor);

    //10秒

    configurer.setDefaultTimeout(10L * 1000);

}

1. configureDefaultServletHandling默认静态资源处理器

 

1. addFormatters

注册自定义的Formatter和Convert,例如, 对于日期类型,枚举类型的转化.不过对于日期类型,使用更多的是使用

 

 

增加转化器或者格式化器。这边不仅可以把时间转化成你需要时区或者样式。还可以自定义转化器和你数据库做交互，比如传进来userId，经过转化可以拿到user对象。

1. addInterceptors：增加拦截器

  @Override

    public void addInterceptors(InterceptorRegistry registry) {

        registry.addInterceptor(new TestHandlerInterceptors()).addPathPatterns("/**");

}

 

public class TestHandlerInterceptors implements HandlerInterceptor {

 

    @Override

    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {

        System.out.println("##########preHandle##########");

        return true;

    }

 

    @Override

   public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception{

        System.out.println("##########postHandle##########");

 

    }

 

    @Override

    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {

        System.out.println("##########afterCompletion##########");

    }

}

1. addResourceHandlers 添加静态资源处理器

public void addResourceHandlers(ResourceHandlerRegistry registry) {

        registry.addResourceHandler("/static/**").addResourceLocations("classpath:/static");              

 }

 

public void addResourceHandlers(ResourceHandlerRegistry registry) {

 // 通过 "/home.html" 请求, 来访问 /resource/static/home.html 静态资源 registry.addResourceHandler("/home.html").addResourceLocations("classpath:/static/home.html");

}

 

1. addCorsMappings配置跨域

public void addCorsMappings(CorsRegistry registry) {

    registry.addMapping("/**")

            .allowedHeaders("*")

            .allowedMethods("*")

            .allowedOrigins("*");

}

var url = "http://112.74.171.99:8080/autoticketapi/pay";                                            

                                       

$.ajax({                                                                                            

    crossDomain : true,                                                                             

    url: url,                                                                                        

    type: "GET",                                                                                    

    data: {"liantuoOrderNo": $(this).attr("liantuoOrderNo"), "orderNo": $(this).attr("orderNo")},   

    dataType: "json",                                                                               

    success: function (data) {                                                                      

        if (data.status != 200) {                                                                    

            alert("自动出票错误,请联系技术")                                                                   

        } else {                                                                                    

            alert(data.msg)                                                                         

        }                                                                                           

    }                                                                                               

});

 

1. configureViewResolvers配置视图解析

public void configureViewResolvers(ViewResolverRegistry registry) {

        registry.jsp("/WEB-INF/jsp/", ".jsp");

        registry.enableContentNegotiation(new MappingJackson2JsonView());

 }

在application.properties里面的spring.mvc.view.prefix以及spring.mvc.view.suffix, 如果配置了视图解析可以不需要在application.properties中配置prefix,suffix这两项了
 

1. addArgumentResolvers：添加自定义方法参数处理器

public void addArgumentResolvers(List<HandlerMethodArgumentResolver> argumentResolvers){

    super.addArgumentResolvers(argumentResolvers);

    argumentResolvers.add(platformSessionArgumentResolvers());

}

需求：想要在Controller的参数列表中注入当前会话的自定义PlatformSession对象。

@Getter

@Setter

public class PlatformSession<T> {

    private T id;  private String username;   private int expireTime;

}

解决方法：创建自定义参数处理器，通过addArgumentResolvers添加到SpringMVC中。

自定义参数处理器：

public class PlatformSessionArgumentResolvers implements HandlerMethodArgumentResolver {

    @Override

    public boolean supportsParameter(MethodParameter methodParameter) {

        return PlatformSession.class.equals(methodParameter.getClass());

    }

 

    @Override

    public Object resolveArgument(MethodParameter methodParameter, ModelAndViewContainer modelAndViewContainer, NativeWebRequest nativeWebRequest, WebDataBinderFactory webDataBinderFactory) throws Exception {

        HttpServletRequest request = nativeWebRequest.getNativeRequest(HttpServletRequest.class);

        return PlatformSessionUtil.getSession(request);

    }

}