1.关于@ControllerAdvice
@ControllerAdvice注解本身已经使用了@Component,因此@ControllerAdvice注解所标注的类将会自动被组件扫描获取到,就像带有@Component注解的类一样。另外,在带有@ControllerAdvice注解的类中,异常处理会应用到所有控制器中带有@RequestMapping注解的方法上。
2.使用示例
自定义exception:
@ResponseStatus(value = HttpStatus.NOT_FOUND,reason = "file not found")
public class NotFoundException extends RuntimeException {
}
定义ControllerAdvice
@ControllerAdvice
public class GlobalExceptionHandler {
@ExceptionHandler(NotFoundException.class)
public String NotFoundHandler()
{
return "error/404.html";
}
@ExceptionHandler(Exception.class)
public String ErrorHandler(){
return "error/error.html";
}
}
错误页controller
@RequestMapping("/error404")
public String error(){
throw new NotFoundException();
}
@RequestMapping("/error")
public String errorNotFound() throws Exception {
throw new Exception();
}
view:
在views/error目录下新增error.html和404.html
3.测试
http://localhost:8092/category/error404
http://localhost:8092/category/error
4.参考资料推荐
http://viralpatel.net/blogs/spring-mvc-exception-handling-controlleradvice-annotation/