版权声明:本文为博主原创文章,未经博主允许不得转载。 https://blog.csdn.net/zhangminemail/article/details/82924870
1、去掉springBoot中默认的异常处理类
@SpringBootApplication(exclude=ErrorMvcAutoConfiguration.class)
public class App {
public static void main(String[] args) {
ConfigurableApplicationContext context = SpringApplication.run(App.class, args);
// HandlerInterceptor
}
}
2、全局异常处理的两种方式
方式一:实现异常注册类ErrorPageRegistrar,重写registerErrorPages接口
import org.springframework.boot.web.server.ErrorPage;
import org.springframework.boot.web.server.ErrorPageRegistrar;
import org.springframework.boot.web.server.ErrorPageRegistry;
import org.springframework.http.HttpStatus;
import org.springframework.stereotype.Component;
@Component
public class CommonErrorRegistry implements ErrorPageRegistrar {
@Override
public void registerErrorPages(ErrorPageRegistry registry) {
ErrorPage e404 = new ErrorPage(HttpStatus.NOT_FOUND, "/404.html");
ErrorPage e500 = new ErrorPage(HttpStatus.INTERNAL_SERVER_ERROR, "/500.html");
ErrorPage nullp = new ErrorPage(NullPointerException.class, "/null.html");
registry.addErrorPages(e404, e500, nullp);
}
}
方式二:使用注解的方式,主要用到类注解@ControllerAdvice,接口注解@ExceptionHandler
import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.ResponseBody;
@ControllerAdvice
public class GolbalExeptionhandler {
@ExceptionHandler(value=Exception.class)
@ResponseBody
public String errorHandler(Exception e){
return "global error " + e.getClass().getName();
}
}
3、局部异常处理
主要用到方法注解 @ExceptionHandler
import java.io.FileNotFoundException;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;
@RestController
public class BookRest {
@ExceptionHandler(Exception.class)
public String error(Exception e){
return "found exception "+e.getMessage();
}
@GetMapping("/book/error1")
public String error1() throws FileNotFoundException{
throw new FileNotFoundException("file not found");
}
@GetMapping("/book/error2")
public String error2() throws ClassNotFoundException{
throw new ClassNotFoundException("class not found");
}
}