软件开发springboot项目过程中,不可避免的需要处理各种异常,spring mvc 架构中各层会出现大量的try {...} catch {...} finally {...} 代码块,不仅有大量的冗余代码,而且还影响代码的可读性。这样就需要定义个全局统一异常处理器,以便业务层再也不必处理异常。
推荐理由
- 代码复制到项目中通过简单的配置即可实现
- 可以灵活的根据自己的业务异常进行更细粒度的扩展
实践
1.封装统一返回结果类
- public class AjaxResult {
- //是否成功
- private Boolean success;
- //状态码
- private Integer code;
- //提示信息
- private String msg;
- //数据
- private Object data;
- public AjaxResult() {
- }
- //自定义返回结果的构造方法
- public AjaxResult(Boolean success,Integer code, String msg,Object data) {
- this.success = success;
- this.code = code;
- this.msg = msg;
- this.data = data;
- }
- //自定义异常返回的结果
- public static AjaxResult defineError(BusinessException de){
- AjaxResult result = new AjaxResult();
- result.setSuccess(false);
- result.setCode(de.getErrorCode());
- result.setMsg(de.getErrorMsg());
- result.setData(null);
- return result;
- }
- //其他异常处理方法返回的结果
- public static AjaxResult otherError(ErrorEnum errorEnum){
- AjaxResult result = new AjaxResult();
- result.setMsg(errorEnum.getErrorMsg());
- result.setCode(errorEnum.getErrorCode());
- result.setSuccess(false);
- result.setData(null);
- return result;
- }
- public Boolean getSuccess() {
- return success;
- }
- public void setSuccess(Boolean success) {
- this.success = success;
- }
- public Integer getCode() {
- return code;
- }
- public void setCode(Integer code) {
- this.code = code;
- }
- public String getMsg() {
- return msg;
- }
- public void setMsg(String msg) {
- this.msg = msg;
- }
- public Object getData() {
- return data;
- }
- public void setData(Object data) {
- this.data = data;
- }
- }
2 自定义异常封装类
- public class BusinessException extends RuntimeException {
- private static final long serialVersionUID = 1L;
-
- protected Integer errorCode;
-
- protected S
- public BusinessException(){
- }
- public BusinessException(Integer errorCode, String errorMsg) {
- this.errorCode = errorCode;
- this.errorMsg = errorMsg;
- }
- public Integer getErrorCode() {
- return errorCode;
- }
- public void setErrorCode(Integer errorCode) {
- this.errorCode = errorCode;
- }
- public String getErrorMsg() {
- return errorMsg;
- }
- public void setErrorMsg(String errorMsg) {
- this.errorMsg = errorMsg;
- }
- }
3 错误枚举,拒绝硬编码
- public enum ErrorEnum {
- // 数据操作错误定义
- SUCCESS(200, "成功"),
- NO_PERMISSION(403,"你没得权限"),
- NO_AUTH(401,"未登录"),
- NOT_FOUND(404, "未找到该资源!"),
- INTERNAL_SERVER_ERROR(500, "服务器异常请联系管理员"),
- ;
-
- private Integer errorCode;
-
- private String errorMsg;
- ErrorEnum(Integer errorCode, String errorMsg) {
- this.errorCode = errorCode;
- this.errorMsg = errorMsg;
- }
- public Integer getErrorCode() {
- return errorCode;
- }
- public String getErrorMsg() {
- return errorMsg;
- }
- }
4 全局异常处理类
-
- @RestControllerAdvice
- public class GlobalExceptionHandler
- {
- private static final Logger log = LoggerFactory.getLogger(GlobalExceptionHandler.class);
-
- @ExceptionHandler(value = BusinessException.class)
- public AjaxResult bizExceptionHandler(BusinessException e) {
- log.error(e.getMessage(), e);
- return AjaxResult.defineError(e);
- }
-
- @ExceptionHandler(value = Exception.class)
- public AjaxResult exceptionHandler( Exception e) {
- log.error(e.getMessage(), e);
- return AjaxResult.otherError(ErrorEnum.INTERNAL_SERVER_ERROR);
- }
- }
5 测试
返回结果: