@RestControllerAdvice注解使用

  在spring 3.2中,新增了@ControllerAdvice,@RestControllerAdvice 注解,可以用于定义@ExceptionHandler、@InitBinder、@ModelAttribute,并应用到所有@RequestMapping中。参考帮助文档@RestControllerAdvice 是组件注解,他使得其实现类能够被classpath扫描自动发现,如果应用是通过MVC命令空间或MVC Java编程方式配置,那么该特性默认是自动开启的

  主要配合@ExceptionHandler使用,统一处理异常情况。下面的ResponseEntity、ResponseData 都是项目自定义的返回对象。

  

import lombok.extern.slf4j.Slf4j;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.RestControllerAdvice;
import org.springframework.web.servlet.NoHandlerFoundException;

@Slf4j
@RestControllerAdvice
public class GlobalExceptionHandler {

    /**
     * 处理运行异常
     */
    @ExceptionHandler(RuntimeException.class)
    public ResponseEntity<String> handleRuntimeException(RuntimeException ex) {
        log.error("", ex);
        return new ResponseEntity<>(ex.getMessage(), HttpStatus.BAD_REQUEST);
    }

    /**
     * 用来捕获404,400这种无法到达controller的错误
     *
     * @param ex
     * @return
     * @throws Exception
     */
    @ExceptionHandler(value = Exception.class)
    public ResponseData defaultErrorHandler(Exception ex) throws Exception {
        log.error("", ex);
        ResponseData<Object> result = new ResponseData<Object>();
        result.setMessage(ex.getMessage());
        if (ex instanceof NoHandlerFoundException) {
            result.setCode("404");
        } else {
            result.setCode("500");
        }
        result.setData(null);
        result.setSuccess(false);
        return result;
    }
}

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转载自www.cnblogs.com/huanshilang/p/10620048.html