nutz中获取request对象 LocalThread的使用

最新推荐文章于 2022-01-13 16:18:11 发布

Allchin

最新推荐文章于 2022-01-13 16:18:11 发布

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分类专栏： javaEE 文章标签： filter exception webapp encoding manager 框架

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本文介绍如何在Nutz框架中通过自定义过滤器XFilter来间接获取HttpServletRequest对象，以便在拦截器等组件中使用。

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nutz中不能直接获取request对象,

要借助其他Filter才能达到目的,

Filter 如下

XFilter.java

package cn.allchin.managercontroller.web.filter; import java.io.IOException; import javax.servlet.Filter; import javax.servlet.FilterChain; import javax.servlet.FilterConfig; import javax.servlet.ServletException; import javax.servlet.ServletRequest; import javax.servlet.ServletResponse; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; public class XFilter implements Filter { public static final ThreadLocal<HttpServletRequest> requests = new ThreadLocal<HttpServletRequest>(); @Override public void doFilter(ServletRequest request, ServletResponse arg1, FilterChain chain) throws IOException, ServletException { try{ request.setAttribute("localThreadResponse", arg1); requests.set((HttpServletRequest)request); chain.doFilter(request, arg1); } catch(Exception e){ System.out.print(e+"@xfilter"); } } public void init(FilterConfig config) throws ServletException {} public void destroy() {} }

然后在web.xml中配置这个filter

给那个框架用,就在哪个框架前配置,比如现在是给

nutz用,

就在nutz前面配置,

整个的配置文件如下 :

<?xml version="1.0" encoding="UTF-8"?> <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5"> <display-name>fanna_manager_controller</display-name> <filter> <filter-name>requestFilter</filter-name> <filter-class>cn.allchin.managercontroller.web.filter.XFilter</filter-class> </filter> <filter-mapping> <filter-name>requestFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <filter> <filter-name>nutz</filter-name> <filter-class>org.nutz.mvc.NutFilter</filter-class> <init-param> <param-name>modules</param-name> <param-value>cn.allchin.managercontroller.web.MainModule</param-value> </init-param> </filter> <filter-mapping> <filter-name>nutz</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <servlet> <servlet-name>img</servlet-name> <servlet-class>cn.allchin.managercontroller.web.filter.ImageServlet</servlet-class> </servlet> <servlet-mapping> <servlet-name>img</servlet-name> <url-pattern>/img</url-pattern> </servlet-mapping> <welcome-file-list> <welcome-file>login</welcome-file> </welcome-file-list> <servlet> <description></description> <display-name>ImageServlet</display-name> <servlet-name>ImageServlet</servlet-name> <servlet-class>cn.allchin.managercontroller.web.filter.ImageServlet</servlet-class> </servlet> <servlet-mapping> <servlet-name>ImageServlet</servlet-name> <url-pattern>/ImageServlet</url-pattern> </servlet-mapping> </web-app>

然后在nutz的想用request的地方

比如一个拦截器中

HttpServletRequest request=XFilter.requests.get();

就Ok了