SpringBoot配置参数解析器（WebArgumentResolver）

朱雀 2021-12-04 09:01 458阅读 0赞

\#\#SpingBoot下的WebArgumentResolver

> 参数解析器  
> 需要集成类型WebArgumentResolver  
> 并在@Configuration配置类型中配置参数解析器

import javax.servlet.http.HttpServletRequest;
    import org.springframework.core.MethodParameter;
    import org.springframework.web.bind.support.WebArgumentResolver;
    import org.springframework.web.context.request.NativeWebRequest;
    
    public class ArgumentResolver implements WebArgumentResolver {
    	@Override
    	public Object resolveArgument(MethodParameter methodParameter, NativeWebRequest webRequest) throws Exception {
    		Class<?> parameterType = methodParameter.getParameterType();
    		if (parameterType != null) {
    			HttpServletRequest request = webRequest.getNativeRequest(HttpServletRequest.class);
    			if (parameterType.equals(User.class)) {
    				return request.getAttribute(Constant.CURRENT_WX_USER_LOGIN);
    			}
    		}
    		return UNRESOLVED;
    	}
    }

@Configuration
    public class WebConfig extends WebMvcConfigurationSupport {
        @Override
        public void addArgumentResolvers(List<HandlerMethodArgumentResolver> argumentResolvers) {
            argumentResolvers.add(new ServletWebArgumentResolverAdapter(new ArgumentResolver()));
        }
    }

添加拦截器，并在配置文件中配置拦截器

import com.qf.common.constant.Constants;
    import com.qf.entity.dto.Admin;
    import org.apache.shiro.SecurityUtils;
    import org.springframework.web.method.HandlerMethod;
    import org.springframework.web.servlet.handler.HandlerInterceptorAdapter;
    import javax.servlet.http.HttpServletRequest;
    import javax.servlet.http.HttpServletResponse;
    
    public class PermissionInterceptor extends HandlerInterceptorAdapter {
        @Override
        public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler)
                throws Exception {
            if (handler.getClass().isAssignableFrom(HandlerMethod.class)) {
                    Admin admin = (Admin) SecurityUtils.getSubject().getPrincipal();
                    if (admin != null) {
                        request.setAttribute(Constants.LOGIN_ADMIN, admin);
                    }
            }
            return super.preHandle(request, response, handler);
        }
    }

import com.qf.admin.interceptor.PermissionInterceptor;
    import com.qf.admin.resolver.ArgumentResolver;
    import org.springframework.context.annotation.Bean;
    import org.springframework.context.annotation.Configuration;
    import org.springframework.web.method.support.HandlerMethodArgumentResolver;
    import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
    import org.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport;
    import org.springframework.web.servlet.mvc.method.annotation.ServletWebArgumentResolverAdapter;
    import java.util.List;
    
    @Configuration
    public class WebConfig extends WebMvcConfigurationSupport {
        @Bean
        public PermissionInterceptor permissionInterceptor() {
            return new PermissionInterceptor();
        }
    
        @Override
        public void addInterceptors(InterceptorRegistry registry) {
            registry.addInterceptor(permissionInterceptor()) // 权限拦截器
                    .addPathPatterns("/**") // 拦截所有
                    .excludePathPatterns("/") // 排除拦截默认
                    .excludePathPatterns("/css/**") // 排除拦截静态资源
                    .excludePathPatterns("/js/**") // 排除拦截静态资源
                    .excludePathPatterns("/favicon.ico") // 排除拦截静态资源
                    .excludePathPatterns("/login"); // 排除拦截登录逻辑
            super.addInterceptors(registry);
        }
    }