struts2系列十之4中获取使用request,session,application的方法和页面显示的三种方法【后期ognl算第四种】
2013-12-11 20:50
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总结
第一种:通过直接获取
request = (Map)ActionContext.getContext().get("request");
session = ActionContext.getContext().getSession();
application = ActionContext.getContext().getApplication();
第二种 实现接口
class LoginAction2 extends ActionSupport implements RequestAware,SessionAware, ApplicationAware
第三种:通过直接获取
request = ServletActionContext.getRequest();
session = request.getSession();
第四种:通过实现接口
class LoginAction4 extends ActionSupport implements ServletRequestAware
第一种:
第三种:
第四中:
2
登录页面
3 获取值得页面
用了三种方法
a:#requestxxxx
b: request。getAttribute(...)
c: 直接属性取值#attr.ri
<%@taglib uri="/struts-tags" prefix="s" %>
第一种:通过直接获取
request = (Map)ActionContext.getContext().get("request");
session = ActionContext.getContext().getSession();
application = ActionContext.getContext().getApplication();
第二种 实现接口
class LoginAction2 extends ActionSupport implements RequestAware,SessionAware, ApplicationAware
第三种:通过直接获取
request = ServletActionContext.getRequest();
session = request.getSession();
第四种:通过实现接口
class LoginAction4 extends ActionSupport implements ServletRequestAware
第一种:
package com.bjsxt.struts2.user.action; 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:
package com.bjsxt.struts2.user.action; 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; //DI dependency injection //IoC inverse of control 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; } }
第三种:
package com.bjsxt.struts2.user.action; 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; } }
第四中:
package com.bjsxt.struts2.user.action; 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(); } }
2
登录页面
<form name="f" action="" method="post"> 用户名:<input type="text" name="name"/> 密码:<input type="text" name="password"/> <br /> <input type="button" value="submit1" onclick="javascript:document.f.action='login/login1';document.f.submit();" /> <input type="button" value="submit2" onclick="javascript:document.f.action='login/login2';document.f.submit();" /> <input type="button" value="submit3" onclick="javascript:document.f.action='login/login3';document.f.submit();" /> <input type="button" value="submit4" onclick="javascript:document.f.action='login/login4';document.f.submit();" /> </form>
3 获取值得页面
用了三种方法
a:#requestxxxx
b: request。getAttribute(...)
c: 直接属性取值#attr.ri
<%@taglib uri="/struts-tags" prefix="s" %>
User Login Success! <br /> <s:property value="#request.r1"/> | <%=request.getAttribute("r1") %> <br /> <s:property value="#session.s1"/> | <%=session.getAttribute("s1") %> <br /> <s:property value="#application.a1"/> | <%=application.getAttribute("a1") %> <br /> <s:property value="#attr.a1"/><br /> <s:property value="#attr.s1"/><br /> <s:property value="#attr.r1"/><br /> <s:debug></s:debug> <br />
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