SpringBoot全局异常捕获处理实现方案

import your.package.IllegalNumberException;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.ResponseBody;

/**
 * @class GlobalExceptionHeadler
 * @date 2021/8/28 13:41
 */
@ControllerAdvice
public class GlobalExceptionHeadler {

    //处理指定异常
    @ExceptionHandler(value = IllegalNumberException.class)//IllegalNumberException 自定义异常
    @ResponseBody
    public ResponseEntity<String> illegalNumberExceptionHeadler(Exception e){
        System.out.println("进入非法参数异常处理");
        return new ResponseEntity<>(e.getMessage(),HttpStatus.INTERNAL_SERVER_ERROR);
    }

    //处理exceptioin子类异常
    @ExceptionHandler(value = Exception.class)//作用方法上，作用：用来处理指定异常； value属性：用来处理指定类型的异常
    @ResponseBody
    public ResponseEntity<String> exceptionHeadler(Exception e){
        //if(e instanceof IllegalNumberException){} 等价于 上面的方法处理指定异常
        System.out.println("进入自定义异常处理");
        return new ResponseEntity<>(e.getMessage(),HttpStatus.INTERNAL_SERVER_ERROR);
    }
}

/**
 * @class IllegalNumberException
 * @date 2021/8/28 14:05
 */
public class IllegalNumberException extends RuntimeException{
    public IllegalNumberException(String message){
        super(message);
    }
}

import your.package.IllegalNumberException;
import lombok.extern.slf4j.Slf4j;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RestController;

@RestController
@Slf4j
public class Test2Controller {
    

    @GetMapping("/testException")
    public ResponseEntity<String> demo(){
        int i = 1/0;
        return new ResponseEntity<>("ok", HttpStatus.OK);
    }

    @GetMapping("/testIllegalNumberException/{id}")
    public ResponseEntity<String> demo(@PathVariable("id") Integer id){
        if(id < 0){
            throw new IllegalNumberException("无效id，请检查");
        }
        return new ResponseEntity<>("ok", HttpStatus.OK);
    }


}