springboot 自定义异常并捕获异常返给前端的实现代码

public class BusinessException extends  RuntimeException {
	/**
	 * 错误编码
	 */
	private String code;
 
	public BusinessException() {
		super();
	}
 
	public BusinessException(String message) {
		super(message);
	}
 
	public BusinessException(String code, String message) {
		super(message);
		this.code = code;
	}
 
	public BusinessException(Throwable cause) {
		super(cause);
	}
 
	public BusinessException(String message, Throwable cause) {
		super(message, cause);
	}
 
	public BusinessException(String message, Throwable cause,
							 boolean enableSuppression, boolean writableStackTrace) {
		super(message, cause, enableSuppression, writableStackTrace);
	}
 
	public String getCode() {
		return code;
	}
 
	public void setCode(String code) {
		this.code = code;
	}
 
	@Override
	public String getMessage() {
		return super.getMessage();
	}
 
	@Override
	public String toString() {
		return this.code + ":" + this.getMessage();
	}
}

public class SystemException extends  RuntimeException {
	/**
	 * 错误编码
	 */
	private String code;
 
	public SystemException() {
		super();
	}
 
	public SystemException(String message) {
		super(message);
	}
 
	public SystemException(String code, String message) {
		super(message);
		this.code = code;
	}
 
	public SystemException(Throwable cause) {
		super(cause);
	}
 
	public SystemException(String message, Throwable cause) {
		super(message, cause);
	}
 
	public SystemException(String message, Throwable cause,
                           boolean enableSuppression, boolean writableStackTrace) {
		super(message, cause, enableSuppression, writableStackTrace);
	}
 
	public String getCode() {
		return code;
	}
 
	public void setCode(String code) {
		this.code = code;
	}
 
	@Override
	public String getMessage() {
		return super.getMessage();
	}
 
	@Override
	public String toString() {
		return this.code + ":" + this.getMessage();
	}
}

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.ResponseBody;
 
@ControllerAdvice
public class ExceptionAdvice {
    public static Logger logger = LoggerFactory.getLogger(ExceptionAdvice.class);
 
    @ResponseBody
    @ExceptionHandler(SystemException.class)
    public Result handleException(Exception e) {
        logger.error("系统异常信息：", e);
        Result result = new Result();
        if (e instanceof BusinessException) {
            e = (BusinessException) e;
            result.setCode(((BusinessException) e).getCode());
        }
        result.setFailed(e.getMessage());
        return result;
    }
 
    @ExceptionHandler(RuntimeException.class)
    @ResponseBody
    public Result handleException(RuntimeException e) {
        logger.error("异常信息：", e.getMessage());
        Result result = new Result();
        result.setStatus(500);
        result.setMessage(e.getMessage());
        return result;
    }
 
    @ExceptionHandler(BusinessException.class)
    @ResponseBody
    public AjaxJson doBusinessException(Exception e) {
        AjaxJson ajaxJson = new AjaxJson();
        logger.error("业务异常消息：", e.getMessage());
        ajaxJson.setRet(-1);
        ajaxJson.setMsg(e.getMessage());
        return ajaxJson;
    }
 
}

throw new SystemException("aaaa");