SpringBoot（三）HandlerInterceptor

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HandlerInterceptor

攔截器用的機會不多，在這裡做資料簽名校正不錯，不過更多的人喜歡寫Filter，

這個切面神奇的地方是：可以在頁面渲染的不同階段使用Writer，如果需要往所有頁面添加一點浮水印或者通用代碼，代碼可以寫在這。

import org.springframework.web.servlet.HandlerInterceptor;import org.springframework.web.servlet.ModelAndView;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;/** * 請求攔截器， * * Created by 12614 on 2018/5/11. */public class TestInterceptor implements HandlerInterceptor {    @Override    public boolean preHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o) throws Exception {        System.out.println("TestInterceptor: preHandle");        //TODO 請求攔截處理邏輯        return true;    }    @Override    public void postHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, ModelAndView modelAndView) throws Exception {        System.out.println("TestInterceptor: postHandle");        //TODO 頁面渲染前置邏輯        //E.G.        httpServletResponse.getWriter().write("-----------------------");    }    @Override    public void afterCompletion(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, Exception e) throws Exception {        System.out.println("TestInterceptor: afterCompletion");        //TODO 頁面渲染後置邏輯        //E.G.        httpServletResponse.getWriter().write("========================");    }}

Spring配置

<mvc:interceptors>   <mvc:interceptor>        <!--進行攔截的路徑-->        <mvc:mapping path="/**"/>         <!--不進行攔截的路徑-->           <mvc:exclude-mapping path="/lib/**" />         <beans:bean class="xxxxx全類名"/>    </mvc:interceptor></mvc:interceptors>

SpringBoot配置

import org.springframework.context.annotation.Configuration;import org.springframework.web.servlet.config.annotation.InterceptorRegistry;import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;/** * Created by 12614 on 2018/5/11. */@Configurationpublic class ApplicationConfigurer extends WebMvcConfigurerAdapter {    @Override    public void addInterceptors(InterceptorRegistry registry) {        super.addInterceptors(registry);        registry.addInterceptor(new TestInterceptor())                .addPathPatterns("/**.ftl","/**.json");    }}

 

SpringBoot（三）HandlerInterceptor