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spring-mvc - Send Data to HTML Template through Spring AOP?

问题描述

I'd like to wrap all the controller methods using Spring AOP for Error Handling.

But, How to send e.getMessage() in catch block to ${errorMessage} in error.html properly?

Thanks for the response!

    @Pointcut("within(com.test.mvc.controller.*) && @within(org.springframework.stereotype.Controller)")
    public void controllerLayer() {
    }

    @Pointcut("execution(public String *(..))")
    public void publicMethod() {
    }

    @Pointcut("controllerLayer() && publicMethod()")
    public void controllerPublicMethod() {
    }

    @Around("controllerPublicMethod()")
    public String processRequest(ProceedingJoinPoint joinPoint) {

        try {

            return (String) joinPoint.proceed();

        } catch (Throwable e) {

            LOGGER.info("{}", e.getMessage());
            return "error.html";

        }

    }

<body>

        <h1>Something went wrong!</h1>
        <h3 th:text="'Error Message: ' + ${errorMessage}"></h3>

</body>

标签： spring-mvcthymeleafspring-aop

解决方案

Following aspect can set the request attribute to display errorMessage.

@Around("controllerPublicMethod()")
public Object processRequest(ProceedingJoinPoint joinPoint) {
    Object object=null;
    try {
        object = joinPoint.proceed();
    } catch (Throwable e) {
        RequestContextHolder.getRequestAttributes().setAttribute("errorMessage",e.getMessage(),0); // scope 0 - request , 1 - session
        return "error.html";
    }
    return object;
}

I recommend you please explore the possibilities of @ControllerAdvice

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