SpringMVC拦截器详解
作者：池鱼i_
本篇文章主要介绍了SpringMVC拦截器配置及使用方法，小编觉得挺不错的，现在分享给大家，也给大家做个参考。一起跟随小编过来看看吧
web.xml文件
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
version="4.0">
<!-- 配置springMvc中央处理器-->
<servlet>
<servlet-name>springMVC</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<!-- 初始化的时候配置加载springmvc的配置文件-->
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:spring-mvc.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<!-- 3、修改web.xml中的请求路径地址方式-->
<servlet-mapping>
<servlet-name>springMVC</servlet-name>
<!-- 3、修改web.xml中的请求路径地址方式-->
<url-pattern>/</url-pattern>
<!-- <url-pattern>*.do</url-pattern>-->
</servlet-mapping>
<!--
1、将css文件使用默认处理方式进行处理，不再交由中央控制器处理，
设置路径的更高匹配优先级
-->
<!-- <servlet-mapping>-->
<!-- <servlet-name>default</servlet-name>-->
<!-- <url-pattern>*.css</url-pattern>-->
<!-- <url-pattern>*.js</url-pattern>-->
<!-- <url-pattern>*.jpg</url-pattern>-->
<!-- <url-pattern>*.png</url-pattern>-->
<!-- <url-pattern>*.html</url-pattern>-->
<!-- </servlet-mapping>-->
</web-app>
springMVC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
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc.xsd">
<!--自动扫描包-->
<!-- 开启ioc 注解事务支持-->
<context:component-scan base-package="cn"></context:component-scan>
<!--开启spiring mvc注解支持-->
<mvc:annotation-driven></mvc:annotation-driven>
<!--配置spring 中的视图解析器-->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver" id="resolver">
<property name="prefix" value="/"></property>
<property name="suffix" value=".jsp"></property>
</bean>
<mvc:interceptors>
<bean id="interceptor1" class="cn.hp.interceptor.TestInterceptor1"></bean>
<mvc:interceptor>
<mvc:mapping path="/**"/>
<bean id="interceptor1" class="cn.hp.interceptor.TestInterceptor1"></bean>
</mvc:interceptor>
<mvc:interceptor>
<mvc:mapping path="/test1.do"/>
<mvc:exclude-mapping path="/test2.do"/>
<bean id="interceptor2" class="cn.hp.interceptor.TestInterceptor2"></bean>
</mvc:interceptor>
</beans>
controller类：
package cn.hp.action;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import javax.servlet.http.HttpSession;
@Controller
public class UserAction {
@RequestMapping("/test1.do")
public String test01(){
System.out.println("正在执行test1这个业务逻辑");
return "index";
}
@RequestMapping("/test2.do")
public String test02(){
System.out.println("正在执行test2这个业务逻辑");
return "index";
}
}
第一个拦截器配置：
package cn.hp.interceptor;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class TestInterceptor1 implements HandlerInterceptor {
@Override
public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
System.out.println("第一个拦截器，执行业务逻辑之前执行此方法");
return true;
}
@Override
public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
System.out.println("第一个拦截器，执行业务逻辑之后，视图渲染之前执行此方法");
}
@Override
public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
System.out.println("第一个拦截器，执行视图渲染之后执行此方法");
}
}
第二个拦截器：
package cn.hp.interceptor;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class TestInterceptor2 implements HandlerInterceptor {
@Override
public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
System.out.println("第二个拦截器，执行业务逻辑之前执行此方法");
return true;
}
@Override
public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
System.out.println("第二个拦截器，执行业务逻辑之后，视图渲染之前执行此方法");
}
@Override
public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
System.out.println("第二个拦截器，执行视图渲染之后执行此方法");
}
}
总结
本篇文章就到这里了，希望能给你带来帮助，也希望您能够多多关注脚本之家的更多内容！