本篇文章给大家分享的是有关Springmvc实现异常处理器及拦截器，小编觉得挺实用的，因此分享给大家学习，希望大家阅读完这篇文章后可以有所收获，话不多说，跟着小编一起来看看吧。
一、异常处理器
1、实现HandlerExceptionResolver接口
package com.wuxi.exceptions;
import org.springframework.web.servlet.HandlerExceptionResolver;
import org.springframework.web.servlet.ModelAndView;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class RequestExceptionResolver implements HandlerExceptionResolver {
@Override
public ModelAndView resolveException(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, Exception e) {
ModelAndView mv = new ModelAndView();
mv.addObject("errorMsg", e.getMessage());//错误信息
mv.setViewName("error");//请求转发的页面
return mv;
}
}2、springmvc的xml配置文件
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="http://www.springframework.org/schema/beans
https://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
https://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/mvc
https://www.springframework.org/schema/mvc/spring-mvc.xsd">
<!--扫描组件-->
<context:component-scan base-package="com.wuxi"></context:component-scan>
<!--视图解析器-->
<bean id="internalResourceViewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/pages/"></property>
<property name="suffix" value=".jsp"></property>
</bean>
<!--参数类型装换器-->
<bean id="conversionService" class="org.springframework.context.support.ConversionServiceFactoryBean">
<property name="converters">
<set>
<bean class="com.wuxi.utils.StringToDateConverter"></bean>
</set>
</property>
</bean>
<!--配置调度器不拦截静态资源-->
<mvc:resources mapping="/css/**" location="/css/"></mvc:resources>
<mvc:resources mapping="/images/**" location="/images/"></mvc:resources>
<mvc:resources mapping="/js/**" location="/js/"></mvc:resources>
<!--配置文件解析器对象-->
<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
<property name="maxUploadSize" value="10485760"></property>
</bean>
<!--异常处理器-->
<bean id="requestExceptionResolver" class="com.wuxi.exceptions.RequestExceptionResolver"></bean>
<!--开启springmvc框架注解的支持-->
<mvc:annotation-driven conversion-service="conversionService"></mvc:annotation-driven>
</beans>二、拦截器
1、实现HandlerInterceptor接口
package com.wuxi.interceptors;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class ControllerInterceptor implements HandlerInterceptor {
@Override
public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
System.out.println("controller的方法执行之前执行");
return true;//true：放行；false：拦截
}
@Override
public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
System.out.println("controller的方法执行之后执行");
}
@Override
public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
System.out.println("jsp执行之后执行");
}
}2、springmvc的xml配置文件
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="http://www.springframework.org/schema/beans
https://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
https://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/mvc
https://www.springframework.org/schema/mvc/spring-mvc.xsd">
<!--扫描组件-->
<context:component-scan base-package="com.wuxi"></context:component-scan>
<!--视图解析器-->
<bean id="internalResourceViewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/pages/"></property>
<property name="suffix" value=".jsp"></property>
</bean>
<!--参数类型装换器-->
<bean id="conversionService" class="org.springframework.context.support.ConversionServiceFactoryBean">
<property name="converters">
<set>
<bean class="com.wuxi.utils.StringToDateConverter"></bean>
</set>
</property>
</bean>
<!--配置调度器不拦截静态资源-->
<mvc:resources mapping="/css/**" location="/css/"></mvc:resources>
<mvc:resources mapping="/images/**" location="/images/"></mvc:resources>
<mvc:resources mapping="/js/**" location="/js/"></mvc:resources>
<!--配置文件解析器对象-->
<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
<property name="maxUploadSize" value="10485760"></property>
</bean>
<!--异常处理器-->
<bean id="requestExceptionResolver" class="com.wuxi.exceptions.RequestExceptionResolver"></bean>
<!--拦截器-->
<mvc:interceptors>
<!--可配置多个拦截器，执行顺序pre1->pre2->controller->post2->post1->jsp->after2->after1-->
<mvc:interceptor>
<!--拦截的资源路径-->
<mvc:mapping path="/**"/>
<!--不拦截的资源路径-->
<!--<mvc:exclude-mapping path="/hello"/>-->
<bean class="com.wuxi.interceptors.ControllerInterceptor"></bean>
</mvc:interceptor>
</mvc:interceptors>
<!--开启springmvc框架注解的支持-->
<mvc:annotation-driven conversion-service="conversionService"></mvc:annotation-driven>
</beans>以上就是Springmvc实现异常处理器及拦截器，小编相信有部分知识点可能是我们日常工作会见到或用到的。希望你能通过这篇文章学到更多知识。更多详情敬请关注亿速云行业资讯频道。
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