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方式一：@ExceptionHandler

在一个controller内的统一处理

import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.bind.annotation.ExceptionHandler;

@RestController
public class TestCtl {

    @RequestMapping("/ready")
    public String ready(){
            throw new RuntimeException("ready抛出的异常");
    }
    
    @ExceptionHandler
    public String ExceptionHandler(Exception e) {
            return e.getMessage();
    }
}

@ExceptionHandler是Spring MVC已有的注解，可用于Controller、ControllerAdvice、RestControllerAdvice类的异常处理。

@ExceptionHandler下方法返回值类型支持多种，常见的ModelAndView，@ResponseBody注解标注，ResponseEntity等类型都OK.

方式二：@ControllerAdvice+@ExceptionHandler

import org.springframework.core.annotation.Order;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.bind.annotation.RestControllerAdvice;

@Order(0)
@RestControllerAdvice(annotations = RestController.class)
public class RestCtlAdvice {

@ExceptionHandler
@ResponseBody //RestControllerAdvice中无需添加此注解，同RestController
    public String ExceptionHandler(Exception e) {
            return e.getMessage();
    }
}