一、異常處理器

1、實現HandlerExceptionResolver介面

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());//錯誤資訊
    mv.setViewName("error");//請求轉發的頁面
    return mv;
  }
}

2、springmvc的xml配置檔案

<?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">
  <!--掃描元件-->
  <context:component-scan base-package="com.wuxi"></context:component-scan>
  <!--檢視解析器-->
  <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>
  <!--引數型別裝換器-->
  <bean id="conversionService" class="org.springframework.context.support.ConversionServiceFactoryBean">
    <property name="converters">
      <set>
        <bean class="com.wuxi.utils.StringToDateConverter"></bean>
      </set>
    </property>
  </bean>
  <!--配置排程器不攔截靜態資源-->
  <mvc:resources mapping="/css/**" location="/css/"></mvc:resources>
  <mvc:resources mapping="/images/**" location="/images/"></mvc:resources>
  <mvc:resources mapping="/js/**" location="/js/"></mvc:resources>
  <!--配置檔案解析器物件-->
  <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
    <property name="maxUploadSize" value="10485760"></property>
  </bean>
  <!--異常處理器-->
  <bean id="requestExceptionResolver" class="com.wuxi.exceptions.RequestExceptionResolver"></bean>
  <!--開啟springmvc框架註解的支援-->
  <mvc:annotation-driven conversion-service="conversionService"></mvc:annotation-driven>
</beans>

二、攔截器

1、實現HandlerInterceptor介面

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的方法執行之前執行");
    return true;//true：放行；false：攔截
  }

  @Override
  public void postHandle(HttpServletRequest request,Object handler,ModelAndView modelAndView) throws Exception {
    System.out.println("controller的方法執行之後執行");
  }

  @Override
  public void afterCompletion(HttpServletRequest request,Exception ex) throws Exception {
    System.out.println("jsp執行之後執行");
  }
}

2、springmvc的xml配置檔案

<?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">
  <!--掃描元件-->
  <context:component-scan base-package="com.wuxi"></context:component-scan>
  <!--檢視解析器-->
  <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>
  <!--引數型別裝換器-->
  <bean id="conversionService" class="org.springframework.context.support.ConversionServiceFactoryBean">
    <property name="converters">
      <set>
        <bean class="com.wuxi.utils.StringToDateConverter"></bean>
      </set>
    </property>
  </bean>
  <!--配置排程器不攔截靜態資源-->
  <mvc:resources mapping="/css/**" location="/css/"></mvc:resources>
  <mvc:resources mapping="/images/**" location="/images/"></mvc:resources>
  <mvc:resources mapping="/js/**" location="/js/"></mvc:resources>
  <!--配置檔案解析器物件-->
  <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
    <property name="maxUploadSize" value="10485760"></property>
  </bean>
  <!--異常處理器-->
  <bean id="requestExceptionResolver" class="com.wuxi.exceptions.RequestExceptionResolver"></bean>
  <!--攔截器-->
  <mvc:interceptors>
    <!--可配置多個攔截器，執行順序pre1->pre2->controller->post2->post1->jsp->after2->after1-->
    <mvc:interceptor>
      <!--攔截的資源路徑-->
      <mvc:mapping path="/**"/>
      <!--不攔截的資源路徑-->
      <!--<mvc:exclude-mapping path="/hello"/>-->
      <bean class="com.wuxi.interceptors.ControllerInterceptor"></bean>
    </mvc:interceptor>
  </mvc:interceptors>
  <!--開啟springmvc框架註解的支援-->
  <mvc:annotation-driven conversion-service="conversionService"></mvc:annotation-driven>
</beans>

以上就是本文的全部內容，希望對大家的學習有所幫助，也希望大家多多支援我們。