SpringMVC拦截器配置

我就是我 2024-04-17 22:19 64阅读 0赞

### **1、实现HandlerInterceptor** ###

import org.springframework.stereotype.Component;
    import org.springframework.web.servlet.HandlerInterceptor;
    import org.springframework.web.servlet.ModelAndView;
    
    import javax.servlet.http.HttpServletRequest;
    import javax.servlet.http.HttpServletResponse;
    
    /**
     * @author Joeson
     */
    @Component
    public class TestInterceptor implements HandlerInterceptor {
    
    
        @Override
        public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) {
            //....业务逻辑
            //如果需要继续执行返回true，否则false
            return true;
        }
    
        @Override
        public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) {
            //....业务逻辑
        }
    
        @Override
        public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) {
            return;
        }
    }

## 2、植入Interceptor ##

### （1）Xml方式 ###

1)在SpringMVC的配置文件中加上支持MVC的schema

xmlns:mvc="http://www.springframework.org/schema/mvc"  
        xsi:schemaLocation=" http://www.springframework.org/schema/mvc  
            http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd"

2)使用mvc:interceptors标签来声明需要加入到SpringMVC拦截器链中的拦截器

<mvc:interceptors>  
          
        <bean class="com.host.app.web.interceptor.AllInterceptor"/>  
        <mvc:interceptor>  
            
            <mvc:mapping path="/**"/>  
              
            <bean class="com.xxx.xxx.TestInterceptor"/>  
        </mvc:interceptor>  
    </mvc:interceptors>

### （2）无Xml方式 ###

@Configuration
    @EnableWebMvc
    @ComponentScan
    public class WebConfig extends WebMvcConfigurerAdapter{
            
            @Override
            public void addInterceptors(InterceptorRegistry registry) {
            //这里，注册拦截器。
                registry.addInterceptor(new TestInterceptor());
            }
    }