first commit

src/main/java/com/peanut/modules/app/resolver/LoginUserHandlerMethodArgumentResolver.java

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+/**
+ * Copyright (c) 2016-2019 人人开源 All rights reserved.
+ *
+ * https://www.renren.io
+ *
+ * 版权所有，侵权必究！
+ */
+
+package com.peanut.modules.app.resolver;
+
+import com.peanut.modules.app.entity.UserEntity;
+import com.peanut.modules.app.service.UserService;
+import com.peanut.modules.app.annotation.LoginUser;
+import com.peanut.modules.app.interceptor.AuthorizationInterceptor;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.core.MethodParameter;
+import org.springframework.stereotype.Component;
+import org.springframework.web.bind.support.WebDataBinderFactory;
+import org.springframework.web.context.request.NativeWebRequest;
+import org.springframework.web.context.request.RequestAttributes;
+import org.springframework.web.method.support.HandlerMethodArgumentResolver;
+import org.springframework.web.method.support.ModelAndViewContainer;
+
+/**
+ * 有@LoginUser注解的方法参数，注入当前登录用户
+ *
+ * @author Mark sunlightcs@gmail.com
+ */
+@Component
+public class LoginUserHandlerMethodArgumentResolver implements HandlerMethodArgumentResolver {
+    @Autowired
+    private UserService userService;
+
+    @Override
+    public boolean supportsParameter(MethodParameter parameter) {
+        return parameter.getParameterType().isAssignableFrom(UserEntity.class) && parameter.hasParameterAnnotation(LoginUser.class);
+    }
+
+    @Override
+    public Object resolveArgument(MethodParameter parameter, ModelAndViewContainer container,
+                                  NativeWebRequest request, WebDataBinderFactory factory) throws Exception {
+        //获取用户ID
+        Object object = request.getAttribute(AuthorizationInterceptor.USER_KEY, RequestAttributes.SCOPE_REQUEST);
+        if(object == null){
+            return null;
+        }
+
+        //获取用户信息
+        UserEntity user = userService.getById((Long)object);
+
+        return user;
+    }
+}