源代码

https://gitee.com/youlixishi/demo-world/tree/master/src/spring/spring-global-exception

全局异常捕捉处理

public class HandlerExceptionToViewResolver implements HandlerExceptionResolver {
    @Override
    public ModelAndView resolveException(HttpServletRequest request, HttpServletResponse response, Object o, Exception e) {
        System.out.println("=============================HandlerExceptionToViewResolver====================================================");
        System.out.println(e.toString());
        try {
            response.getWriter().write("{\"from\":\"HandlerExceptionToViewResolver\"}");
        } catch (IOException e1) {
            e1.printStackTrace();
        }
        return null;
    }
}

注册异常处理器

spring 配置文件中添加

测试访问

运行项目，访问localhost:8080/index

更多

入口： org.springframework.web.servlet.doDispatch->processDispatchResult()->processHandlerException()

初始化：org.springframework.web.servlet.onRefresh->initStrategies()->initHandlerExceptionResolvers()->beansOfTypeIncludingAncestors()