Struts2——访问web元素！！！

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Struts2——访问web元素！！！

2013年08月11日 ⁄ 综合 ⁄ 共 3609字 ⁄ 字号小中大 ⁄ 评论关闭

取得Map类型request,session,application的引用:
第一种：（不推荐使用，因为依赖于容器）
import java.util.Map; import com.opensymphony.xwork2.ActionContext; import com.opensymphony.xwork2.ActionSupport; public class LoginAction1 extends ActionSupport { private Map request; private Map session; private Map application; public LoginAction1() { request = (Map)ActionContext.getContext().get("request"); session = ActionContext.getContext().getSession(); application = ActionContext.getContext().getApplication(); } public String execute() { request.put("r1", "r1"); session.put("s1", "s1"); application.put("a1", "a1"); return SUCCESS; } } 
第二种：（推荐使用，IOC，实际中一般只用这种）
import java.util.Map; import org.apache.struts2.interceptor.ApplicationAware; import org.apache.struts2.interceptor.RequestAware; import org.apache.struts2.interceptor.SessionAware; import com.opensymphony.xwork2.ActionContext; import com.opensymphony.xwork2.ActionSupport; public class LoginAction2 extends ActionSupport implements RequestAware,SessionAware, ApplicationAware { private Map<String, Object> request; private Map<String, Object> session; private Map<String, Object> application; public String execute() { request.put("r1", "r1"); session.put("s1", "s1"); application.put("a1", "a1"); return SUCCESS; } @Override public void setRequest(Map<String, Object> request) { this.request = request; } @Override public void setSession(Map<String, Object> session) { this.session = session; } @Override public void setApplication(Map<String, Object> application) { this.application = application; } } 
真实类型 HttpServletRequest, HttpSession, ServletContext的引用:
第三种：（不推荐使用，因为依赖于容器）
import javax.servlet.ServletContext; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpSession; import org.apache.struts2.ServletActionContext; import com.opensymphony.xwork2.ActionSupport; public class LoginAction3 extends ActionSupport { private HttpServletRequest request; private HttpSession session; private ServletContext application; public LoginAction3() { request = ServletActionContext.getRequest(); session = request.getSession(); application = session.getServletContext(); } public String execute() { request.setAttribute("r1", "r1"); session.setAttribute("s1", "s1"); application.setAttribute("a1", "a1"); return SUCCESS; } } 
第四种：（不推荐使用，IOC）
import javax.servlet.ServletContext; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpSession; import org.apache.struts2.interceptor.ServletRequestAware; import com.opensymphony.xwork2.ActionSupport; public class LoginAction4 extends ActionSupport implements ServletRequestAware { private HttpServletRequest request; private HttpSession session; private ServletContext application; public String execute() { request.setAttribute("r1", "r1"); session.setAttribute("s1", "s1"); application.setAttribute("a1", "a1"); return SUCCESS; } @Override public void setServletRequest(HttpServletRequest request) { this.request = request; this.session = request.getSession(); this.application = session.getServletContext(); } } 
页面访问：
<?xml version="1.0" encoding="GB18030" ?> <%@ page language="java" contentType="text/html; charset=GB18030" pageEncoding="GB18030"%> <%@taglib uri="/struts-tags" prefix="s" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=GB18030" /> <title>Insert title here</title> </head> <body> User Login Success! <s:property value="#request.r1"/> | <%=request.getAttribute("r1") %> <s:property value="#session.s1"/> | <%=session.getAttribute("s1") %> <s:property value="#application.a1"/> | <%=application.getAttribute("a1") %> <s:property value="#attr.a1"/> <s:property value="#attr.s1"/> <s:property value="#attr.r1"/> <s:debug></s:debug> </body> </html>

【上篇】Class SVNStatusClient
【下篇】安徒生童话集读后感

作者: dharma

该日志由 dharma 于11年前发表在综合分类下，最后更新于 2013年08月11日.
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Struts2——访问web元素！！！

作者: dharma

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