2.3 Dispatcher请求过程-执行Adapter

invocableMethod.invokeAndHandle(webRequest, mavContainer, new Object[0]);

进入controller调用阶段

##ServletInvocableHandlerMethod. invokeAndHandle

public void invokeAndHandle(ServletWebRequest webRequest, ModelAndViewContainer mavContainer, Object... providedArgs) throws Exception {
        Object returnValue = this.invokeForRequest(webRequest, mavContainer, providedArgs);
        this.setResponseStatus(webRequest);
        if (returnValue == null) {
            if (this.isRequestNotModified(webRequest) || this.getResponseStatus() != null || mavContainer.isRequestHandled()) {
                this.disableContentCachingIfNecessary(webRequest);
                mavContainer.setRequestHandled(true);
                return;
            }
        } else if (StringUtils.hasText(this.getResponseStatusReason())) {
            mavContainer.setRequestHandled(true);
            return;
        }

        mavContainer.setRequestHandled(false);
        Assert.state(this.returnValueHandlers != null, "No return value handlers");

        try {
            this.returnValueHandlers.handleReturnValue(returnValue, this.getReturnValueType(returnValue), mavContainer, webRequest);
        } catch (Exception var6) {
            if (this.logger.isTraceEnabled()) {
                this.logger.trace(this.formatErrorForReturnValue(returnValue), var6);
            }

            throw var6;
        }
    }

• invokeForRequest
  执行方法
• handleReturnValue
  处理结果
  在这里就会有json处理
  当然也有其他处理

invokeForRequest

 @Nullable
    public Object invokeForRequest(NativeWebRequest request, @Nullable ModelAndViewContainer mavContainer, Object... providedArgs) throws Exception {
        Object[] args = this.getMethodArgumentValues(request, mavContainer, providedArgs);
        if (this.logger.isTraceEnabled()) {
            this.logger.trace("Arguments: " + Arrays.toString(args));
        }

        return this.doInvoke(args);
    }

getMethodArgumentValues

在这里解析参数
各种系统默认的
自定义的解析参数的方法都有

protected Object[] getMethodArgumentValues(NativeWebRequest request, @Nullable ModelAndViewContainer mavContainer, Object... providedArgs) throws Exception {
        MethodParameter[] parameters = this.getMethodParameters();
        if (ObjectUtils.isEmpty(parameters)) {
            return EMPTY_ARGS;
        } else {
            Object[] args = new Object[parameters.length];

            for(int i = 0; i < parameters.length; ++i) {
                MethodParameter parameter = parameters[i];
                parameter.initParameterNameDiscovery(this.parameterNameDiscoverer);
                args[i] = findProvidedArgument(parameter, providedArgs);
                if (args[i] == null) {
                    if (!this.resolvers.supportsParameter(parameter)) {
                        throw new IllegalStateException(formatArgumentError(parameter, "No suitable resolver"));
                    }

                    try {
                        args[i] = this.resolvers.resolveArgument(parameter, mavContainer, request, this.dataBinderFactory);
                    } catch (Exception var10) {
                        if (this.logger.isDebugEnabled()) {
                            String exMsg = var10.getMessage();
                            if (exMsg != null && !exMsg.contains(parameter.getExecutable().toGenericString())) {
                                this.logger.debug(formatArgumentError(parameter, exMsg));
                            }
                        }

                        throw var10;
                    }
                }
            }

            return args;
        }
    }

doInvoke

在这里执行

@Nullable
    protected Object doInvoke(Object... args) throws Exception {
        ReflectionUtils.makeAccessible(this.getBridgedMethod());

        try {
            return this.getBridgedMethod().invoke(this.getBean(), args);
        } catch (IllegalArgumentException var4) {
            this.assertTargetBean(this.getBridgedMethod(), this.getBean(), args);
            String text = var4.getMessage() != null ? var4.getMessage() : "Illegal argument";
            throw new IllegalStateException(this.formatInvokeError(text, args), var4);
        } catch (InvocationTargetException var5) {
            Throwable targetException = var5.getTargetException();
            if (targetException instanceof RuntimeException) {
                throw (RuntimeException)targetException;
            } else if (targetException instanceof Error) {
                throw (Error)targetException;
            } else if (targetException instanceof Exception) {
                throw (Exception)targetException;
            } else {
                throw new IllegalStateException(this.formatInvokeError("Invocation failure", args), targetException);
            }
        }
    }

getBridgedMethod 就是controller对应的类
反射调用方法
如果有advice方法，那算是SpringAop层面的流程
不在请求主流程分析中