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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