struts2+jsp filter和Interceptor配置
??? 最近做了个一个项目，需要配置权限访问，就随便网上查了下资料，总结了下，这三种常用配置方式。首先明白这点filter主要拦截url地址，interceptor拦截访问的action。
一、jsp 配置filter 过滤器，
???? （1）配置过滤器，过滤url地址
????? web.xml 中配置
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<!-- 配置过滤器，控制jsp目录下的访问权限 --> <filter> <filter-name>perimission filter</filter-name> <filter-class> com.flower.filter.PermissionFilter </filter-class> </filter> <filter-mapping> <filter-name>perimission filter</filter-name> <url-pattern>/jsp/*</url-pattern> </filter-mapping>
??? filter配置如下
???
package com.flower.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;import javax.servlet.http.HttpSession;/** * 配置filter过滤器，判断用户是否登陆，没有登陆跳转到index.jsp * @author Administrator * */public class PermissionFilter implements Filter{public void destroy() {}public void doFilter(ServletRequest arg0, ServletResponse arg1,FilterChain chain) throws IOException, ServletException {HttpServletRequest request=(HttpServletRequest) arg0;HttpSession session=request.getSession();HttpServletResponse response=(HttpServletResponse) arg1;//判断后台是否登陆，如果没登陆跳转到index.jspif(session.getAttribute("falgAdmin")==null||((Integer)session.getAttribute("falgAdmin")!=2)){System.out.println("用户未登陆，跳转到index.jsp");response.sendRedirect(request.getContextPath());return ;}System.out.println("用户登陆");chain.doFilter(arg0, arg1); //如果登陆直接向下执行}public void init(FilterConfig filterConfig) throws ServletException {}}?（2）、配置字符过滤器
? web.xml 配置如下
<filter> <filter-name>CharacterEncodingFilter</filter-name> <filter-class>com.test.filter.CharacterEncodingFilter</filter-class> <init-param> <param-name>encoding</param-name> <param-value>utf-8</param-value> </init-param> </filter> <filter-mapping> <filter-name>CharacterEncodingFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping>
?
filter配置如下
package com.test.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; public class CharacterEncodingFilter implements Filter { protected FilterConfig filterConfig = null; protected String encoding = ""; public void destroy() { filterConfig = null; encoding = null; } public void doFilter(ServletRequest request, ServletResponse response, FilterChain filterChain) throws IOException, ServletException { if (encoding != null) { //设置request和response的编程格式，注意两个都要设，若没设response的 //charset，则在输出页面会显示乱码。 request.setCharacterEncoding(this.encoding); response.setContentType("text/html;charset=utf-8"); } //继续执行下一个过滤器 filterChain.doFilter(request, response); } public void init(FilterConfig filterConfig) throws ServletException { this.filterConfig = filterConfig; this.encoding = filterConfig.getInitParameter("encoding"); } } ?二、struts配置interceptor
????? struts.xml配置如下
<!-- 定义一个权限拦截器 authorityInterceptor --> <interceptors> <interceptor name="authorityInterceptor" name="code">package com.flower.interceptor;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpSession;import org.apache.struts2.ServletActionContext;import org.apache.struts2.interceptor.ServletRequestAware;import com.flower.model.User;import com.opensymphony.xwork2.Action;import com.opensymphony.xwork2.ActionInvocation;import com.opensymphony.xwork2.interceptor.AbstractInterceptor;/** * ll * @author Administrator * */public class AuthorityInterceptor extends AbstractInterceptor{@Overridepublic String intercept(ActionInvocation actionInvocation) throws Exception {HttpSession session=ServletActionContext.getRequest().getSession();User user=(User)session.getAttribute("user");if(user!=null){System.out.println("action:用登陆");return actionInvocation.invoke(); //继续往下执行interceptor或者action}else{return Action.NONE; //globle 与全局访问结果集对应,拦截，返回指定页面}}}?