springboot + @ControllerAdvice + @ExceptionHandler 实现全局异常拦截
1.目的:实现全局异常拦截,不用在controller在写try catch,使用代码看起来更加整洁
2.不啰嗦直接上代码
2.1首先我们创建一个异常捕获处理类(@RestControllerAdvice = @ControllerAdvice + @ResponseBody)
@RestControllerAdvice
@Slf4j
public class GlobalExceptionHandler {
/**
* 处理 Exception 异常
*
* @parame
* @param e 异常
* @return
*/
@ExceptionHandler(value = Exception.class)
public ResponseEntity exceptionHandler(Exception e) {
log.error("服务错误:", e);
return ResponseEntity.fail(200, "服务出错");
}
/**
* 处理 BusinessException 异常
*
* @param e
* @param e 异常
* @return
*/
@ExceptionHandler(value = QDSException.class)
public ResponseEntity businessExceptionHandler(QDSException e) {
log.error("业务异常。code:" + e.getCode() + "msg:" + e.getMsg());
return ResponseEntity.fail(e.getCode(), e.getMsg());
}
}
2.2 扩展一下 @RestControllerAdvice还可以指定拦截哪些
2.3创建一个异常返回的实体bean
@Data
public class ResponseEntity implements Serializable {
private Integer code;
private String msg;
private Object data;
public ResponseEntity() {
}
public ResponseEntity(Integer code, String msg, Object data) {
this.code = code;
this.msg = msg;
this.data = data;
}
public ResponseEntity( String msg,Object data) {
this.msg = msg;
this.data = data;
}
public ResponseEntity( Integer code,String msg) {
this.code = code;
this.msg = msg;
}
public static ResponseEntity success(String msg,String data) {
return SUCCESS(msg,data);
}
public static ResponseEntity fail(Integer code,String msg) {
return FAIL(code,msg);
}
public static ResponseEntity SUCCESS(String msg,Object data) {
return new ResponseEntity(msg,data);
}
public static ResponseEntity FAIL(Integer code,String msg) {
return new ResponseEntity(code,msg);
}
}
2.3创建一个自定义异常类
@Data
public class QDSException extends RuntimeException {
private Integer code;
private String msg;
private Object data;
public QDSException(String msg) {
this.msg= msg;
}
public QDSException(Integer code,String msg) {
this.code = code;
this.msg= msg;
}
public QDSException(Integer code, String msg, Object data) {
this.code = code;
this.msg = msg;
this.data = data;
}
}
2.4 接下来我们postman测试一下就可以了
@RestController
public class MyController {
@RequestMapping(value = "/test2")
public ResponseEntity test2() {
throw new QDSException(5005,"错误");
}
}
