1、自定义异常:自定义异常类 BusinessException extends RuntimeException:RuntimeException是 Java 提供的一个运行时异常类。
public class BusinessException extends RuntimeException { private int code; //使用枚举构造 public BusinessException(HttpCodeEnum httpCodeEnum){ super(httpCodeEnum.getMsg()); this.code=httpCodeEnum.getCode(); } //使用自定义消息体 public BusinessException(HttpCodeEnum httpCodeEnum, String msg){ super(msg); this.code=httpCodeEnum.getCode(); } //根据异常构造 public BusinessException(HttpCodeEnum httpCodeEnum, Throwable msg){ super(msg); this.code=httpCodeEnum.getCode(); } }
异常枚举类:
public enum HttpCodeEnum { SUCCESS(200, "操作成功"), NEED_LOGIN(401, "需要登录后操作"), NO_OPERATOR_AUTH(403, "无权限操作"), SYSTEM_ERROR(500, "出现错误") int code; String msg; HttpCodeEnum(int code, String errorMessage) { this.code = code; this.msg = errorMessage; } public int getCode() { return code; } public String getMsg() { return msg; } }
2、自定义全局异常拦截:使用 @RestControllerAdvice 注解和 @ExceptionHandler 注解来实现全局异常拦截
@ExceptionHandler()用于匹配程序发生的异常 然后做出对应的响应
@ResponseStatus(HttpStatus.OK) 表示返回的http状态码,例如如果想要程序抛出异常时候 http状态码还是200 就可以使用HttpStatus.OK,响应体的实际异常状态码由自定义异常code决定,两者并不一致。
@Slf4j @RestControllerAdvice public class GlobalExceptionHandler { /** * 参数非法异常 * * @param e * @return */ @ExceptionHandler(IllegalArgumentException.class) @ResponseStatus(HttpStatus.OK) @ResponseBody public Wrapper<?> illegalArgumentException(IllegalArgumentException e) { log.error("参数非法异常={}", e.getMessage(), e); return WrapMapper.wrap(Wrapper.ERROR_CODE, e.getMessage()); } /** * 业务异常 * * @param e * @return */ @ExceptionHandler(BusinessException.class) @ResponseStatus(HttpStatus.OK) @ResponseBody public Wrapper<?> businessException(BusinessException e) { log.error("业务异常={}", e.getMessage(), e); return WrapMapper.wrap(Wrapper.ERROR_CODE, e.getMessage()); } /** * 主鍵冲突异常 * * @param e * @return */ @ExceptionHandler(DuplicateKeyException.class) @ResponseStatus(HttpStatus.OK) @ResponseBody public Wrapper<?> duplicateKeyException(DuplicateKeyException e) { log.error("主鍵冲突异常={}", e.getMessage(), e); return WrapMapper.wrap(Wrapper.ERROR_CODE, "请稍后再试", WrapMapper.wrap(Wrapper.ERROR_CODE, "请稍后再试")); }
/** * 全局异常 * * @param e * @return */ @ExceptionHandler(Exception.class) @ResponseStatus(HttpStatus.OK) @ResponseBody public Wrapper<?> exception(Exception e) { log.error("保存全局异常信息 ex={}", e.getMessage(), e); return WrapMapper.wrap(Wrapper.ERROR_CODE, e.getMessage()); } }
标签:code,return,自定义,Wrapper,Java,异常,public From: https://www.cnblogs.com/wlong-blog/p/18058397