springboot实现全局异常捕获的使用示例

@Data
public class R<T> implements Serializable {

    private Integer code; //编码：1成功，0和其它数字为失败

    private String msg; //错误信息

    private T data; //数据

    private Map map = new HashMap(); //动态数据

    public static <T> R<T> success(T object) {
        R<T> r = new R<T>();
        r.data = object;
        r.code = 1;
        return r;
    }
    public static <T> R<T> success(String msg,T object) {
        R<T> r = new R<T>();
        r.data = object;
        r.code = 1;
        r.msg = msg;
        return r;
    }

    public static <T> R<T> error(String msg) {
        R r = new R();
        r.msg = msg;
        r.code = 0;
        return r;
    }

    public static <T> R<T> success(String msg) {
        R r = new R();
        r.msg = msg;
        r.code = 1;
        return r;
    }

    public R<T> add(String key, Object value) {
        this.map.put(key, value);
        return this;
    }

}

    //正常情况
    @GetMapping("/hhy/1")
    public R info(){
        int i = 60/1;
        return R.success("成功",i);
    }

    //空指针异常
    @GetMapping("/hhy/2")
    public R info2(){
        int i = 60/0;
        return R.success("成功",i);
    }

/**
 * 全局异常捕获
 */
@Slf4j
@ControllerAdvice(annotations = {RestController.class, Controller.class})
//只要类的注解上有这些注解。那么发生的异常都能被捕获到
@ResponseBody
public class GlobalExceptionHandler {
    /**
     * 处理除0异常捕获
     * @param exception
     * @return
     */
    @ExceptionHandler(ArithmeticException.class)//ArithmeticException异常类型通过注解拿到
    public R<String> exceptionHandler(ArithmeticException exception){
            log.error(exception.getMessage());//在控制台打印错误信息
                return R.error(exception.getMessage());

    }
}

public class CustomException extends RuntimeException{
    /**
     *  自定义业务异常类
     * @param message
     */
    public CustomException(String message){
        super(message);
        log.info(message.toString());
    }
}

 /**
     * 将业务层抛出的异常信息捕获到，然后交给全局异常处理器去处理，给前端提供错误信息
     * @param exception
     * @return
     */
    @ExceptionHandler(CustomException.class)//RuntimeException异常类型通过注解拿到
    public R<String> exceptionCategoryDelete(CustomException exception){
        log.error(exception.getMessage());//在控制台打印错误信息
            return R.error(exception.getMessage());

    }