Spring MVC处理异常有3种方法

1.使用 SimpleMappingExceptionResolver 实现异常处理

<bean class="org.springframework.web.servlet.handler.SimpleMappingExceptionResolver">
    <!-- 异常处理页面 -->
    <property name="defaultErrorView" value="error"></property>
    <!-- 异常信息的变量名，默认名为exception -->
    <property name="exceptionAttribute" value="ex"></property>
    <!-- 需要处理的异常 -->
    <property name="exceptionMappings">
        <props>
            <prop key="xxxxException">error-xxx</prop>
            <prop key="yyyyException">error-yyy</prop>
            <prop key="...">...</prop>
        </props>
    </property>
</bean>

2.实现HandlerExceptionResolver 接口自定义异常处理器

public class DefaultExceptionHandler implements HandlerExceptionResolver
{

    @Override
    public ModelAndView resolveException(
            HttpServletRequest request,
            HttpServletResponse response,
            Object o,
            Exception e) {
    
        return new ModelAndView("error");
    }
}

3.使用@ControllerAdvice，@ExceptionHandler 注解实现

@ControllerAdvice
public class DefaultExceptionHandler
{
    @ExceptionHandler(Throwable.class)
    public ModelAndView resolveException(Exception ex)
    {
        // FastJsonJsonView
        HashMap<String, Object> map = new HashMap<>();
        map.put("code", "1001");
        map.put("msg", ex.getMessage());

        log.error("异常:" + ex.getMessage(), ex);
        return new ModelAndView("error", map);
    }
｝