springMVC-异常统一处理

你的名字 2024-04-18 10:01 72阅读 0赞

1 将异常映射为HTTP状态码

import org.springframework.http.HttpStatus;
    import org.springframework.web.bind.annotation.ResponseStatus;
    
    /**
     * @Author:musi
     * @Date:2019/9/4
     * @Description:
     */
    @ResponseStatus(value = HttpStatus.NOT_FOUND,reason = "spittle not found")
    public class SpittleNotFoundException extends RuntimeException {
    
    }

在使用@ResponseStatus注解之后，如果控制器方法抛出SpittleNotFoundException异常的话，响应将会具有404状态码，这是因为Spittle Not Found

2 统一处理单个controller中的异常

import com.musi.exception.DuplicateSpittleException;
    import org.springframework.stereotype.Controller;
    import org.springframework.web.bind.annotation.ExceptionHandler;
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.bind.annotation.RequestMethod;
    
    /**
     * @Author:musi
     * @Date:2019/8/25
     * @Description:
     */
    @Controller
    public class HomeController {
    
        @RequestMapping(value="/",method = RequestMethod.GET)
        public String home(){
    
            boolean isThrowException = true;
            if(isThrowException){
                throw new DuplicateSpittleException();
            }
            return "home";
        }
    
        @RequestMapping(value="/test",method = RequestMethod.GET)
        public String test(){
    
            boolean isThrowException = true;
            if(isThrowException){
                throw new DuplicateSpittleException();
            }
            return "test";
        }
    
        @ExceptionHandler(DuplicateSpittleException.class)
        public String handleDuplicateSpittle(){
            return "error/duplicate";
        }
    
    }

在使用@ExceptionHandler注解之后，如果当前controller方法抛出DuplicateSpittleException异常的话，程序都会进入handleDuplicateSpittle方法,最终返回到error/duplicate页面

3 统一处理所有controller中的异常

import com.musi.exception.DuplicateSpittleException;
    import org.springframework.web.bind.annotation.ControllerAdvice;
    import org.springframework.web.bind.annotation.ExceptionHandler;
    
    /**
     * @Author:musi
     * @Date:2019/9/4
     * @Description:
     */
    @ControllerAdvice
    public class AppWideExceptionHandler {
    
        @ExceptionHandler(DuplicateSpittleException.class)
        public String handleDuplicateSpittle(){
            return "error/duplicate";
        }
    
    }

在使用@ControllerAdvice和@ExceptionHandler注解之后，所有的controller带有RequestMapping的方法如果抛出DuplicateSpittleException异常的话，程序都会进入handleDuplicateSpittle方法,最终返回到error/duplicate页面