利用HandlerMethodArgumentResolver和注解解析封装用户信息和Http参数

获取用户身份信息详情注解

import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;/*** 获取用户身份信息详情注解*/
@Retention(RetentionPolicy.RUNTIME)
@Target({ElementType.PARAMETER})
public @interface CurrentUserPrincipal {/*** 是否允许匿名用户* @return*/boolean Anonymous() default false;
}

获取HTTP上下文注解

import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;/*** 获取HTTP上下文注解** @author linpx* @date 2022/3/25 下午 6:27*/
@Retention(RetentionPolicy.RUNTIME)
@Target({ElementType.PARAMETER})
public @interface CurrentHttpContext {}

接口HandlerMethodArgumentResolver

/** Copyright 2002-2014 the original author or authors.** Licensed under the Apache License, Version 2.0 (the "License");* you may not use this file except in compliance with the License.* You may obtain a copy of the License at**      https://www.apache.org/licenses/LICENSE-2.0** Unless required by applicable law or agreed to in writing, software* distributed under the License is distributed on an "AS IS" BASIS,* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.* See the License for the specific language governing permissions and* limitations under the License.*/package org.springframework.web.method.support;import org.springframework.core.MethodParameter;
import org.springframework.lang.Nullable;
import org.springframework.web.bind.WebDataBinder;
import org.springframework.web.bind.support.WebDataBinderFactory;
import org.springframework.web.context.request.NativeWebRequest;/*** Strategy interface for resolving method parameters into argument values in* the context of a given request.** @author Arjen Poutsma* @since 3.1* @see HandlerMethodReturnValueHandler*/
public interface HandlerMethodArgumentResolver {/*** Whether the given {@linkplain MethodParameter method parameter} is* supported by this resolver.* @param parameter the method parameter to check* @return {@code true} if this resolver supports the supplied parameter;* {@code false} otherwise*/boolean supportsParameter(MethodParameter parameter);/*** Resolves a method parameter into an argument value from a given request.* A {@link ModelAndViewContainer} provides access to the model for the* request. A {@link WebDataBinderFactory} provides a way to create* a {@link WebDataBinder} instance when needed for data binding and* type conversion purposes.* @param parameter the method parameter to resolve. This parameter must* have previously been passed to {@link #supportsParameter} which must* have returned {@code true}.* @param mavContainer the ModelAndViewContainer for the current request* @param webRequest the current request* @param binderFactory a factory for creating {@link WebDataBinder} instances* @return the resolved argument value, or {@code null} if not resolvable* @throws Exception in case of errors with the preparation of argument values*/@NullableObject resolveArgument(MethodParameter parameter, @Nullable ModelAndViewContainer mavContainer,NativeWebRequest webRequest, @Nullable WebDataBinderFactory binderFactory) throws Exception;}

HTTP上下文参数解析器

import org.springframework.core.MethodParameter;
import org.springframework.web.bind.support.WebDataBinderFactory;
import org.springframework.web.context.request.NativeWebRequest;
import org.springframework.web.method.support.HandlerMethodArgumentResolver;
import org.springframework.web.method.support.ModelAndViewContainer;import javax.servlet.http.HttpServletRequest;/*** HTTP上下文参数解析器*/
public class HttpContextArgumentResolver implements HandlerMethodArgumentResolver {@Overridepublic boolean supportsParameter(MethodParameter methodParameter) {return HttpContext.class.isAssignableFrom(methodParameter.getParameterType()) &&methodParameter.hasParameterAnnotation(CurrentHttpContext.class);}@Overridepublic Object resolveArgument(MethodParameter methodParameter, ModelAndViewContainer modelAndViewContainer, NativeWebRequest nativeWebRequest, WebDataBinderFactory webDataBinderFactory) throws Exception {return new HttpContext(nativeWebRequest.getNativeRequest(HttpServletRequest.class));}
}

用户身份信息参数解析器

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.core.MethodParameter;
import org.springframework.web.bind.support.WebDataBinderFactory;
import org.springframework.web.context.request.NativeWebRequest;
import org.springframework.web.method.support.HandlerMethodArgumentResolver;
import org.springframework.web.method.support.ModelAndViewContainer;/*** 用户身份信息参数解析器*/
public class UserPrincipalArgumentResolver implements HandlerMethodArgumentResolver {@Autowiredprivate UserPrincipalResolverService userPrincipalResolverService;@Overridepublic boolean supportsParameter(MethodParameter methodParameter) {return BaseUserDetail.class.isAssignableFrom(methodParameter.getParameterType()) &&methodParameter.hasParameterAnnotation(CurrentUserPrincipal.class);}@Overridepublic Object resolveArgument(MethodParameter methodParameter, ModelAndViewContainer modelAndViewContainer, NativeWebRequest nativeWebRequest, WebDataBinderFactory webDataBinderFactory) throws Exception {CurrentUserPrincipal annotation = methodParameter.getParameterAnnotation(CurrentUserPrincipal.class);return userPrincipalResolverService.resolve(methodParameter.getParameterType(), annotation.Anonymous());}
}