struts2取得request,session,appilcation的方法
来源:互联网 发布:明源软件录入 编辑:程序博客网 时间:2024/05/16 08:14
- Map类型——request,session,application
- 真实类型——HttpServletRequest,HttpSession,ServletContext
- Map类型是Struts对真实类型的一个封装,会将真实类型映射到Map类型中
- 取得上述元素有以下4种方法
- 1 通过ActionContext来访问request,session,application对象
- 2 通过实现RequestAware、SessionAware、ApplicationAware
- 接口来访问request,session,application对象(常用)
- 3 通过ServletActionContext来访问request,session,application对象
- 4 通过实现ServletRequestAware接口来访问request,session,application对象
- 第一种方法
- 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;
- }
- }
- 通过取得Struts的Action的上下文来取得上述三种元素,map类型的。
- 方法二
- 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;
- // IOC
- 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;
- }
- }
- 通过Struts注入进来三个元素,map类型。
- 前台jsp页面获取后台值的方式
- <s:property value="#request.r1> | <%=request.getAttribute("r1")%>
- <s:property value="#session.s1"/> | <%=session.getAttribute("s1")%>
- <s:property value="#application.a1"/> |<%=application.getAttribute("a1")%>
- 方法三
- 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;
- }
- }
- 取得的是真实的类型
- 方法四
- 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();
- }
- }
0 0
- struts2取得request,session,appilcation的方法
- struts2取得request,session,appilcation的方法
- struts2取得request,session,appilcation的方法
- struts2取得request的方法
- struts2中Action中设置和取得request/session/application的方法
- struts2 Action中取得request,session的四种方式
- Struts2里如何取得request,session,application
- Struts2获取request、session的方法
- struts2 获取request、session的方法
- struts2 获取request、session的方法
- struts2 获取 request session application的方法
- Java类文件中取得request、response、session的方法
- struts2 获取request session方法
- struts2中取得session的公共方法类
- 关于ActionContext.getContext()取得的值是什么,和struts2如何获取request,session,appliaction作用域
- struts2 在Action简单数据验证,取得request,session,application,
- ognl 取得request、session 的值
- ognl 取得request、session 的值
- getch
- JQuery插件-Layui弹出层的一个例子
- Java之——基本数据类型与byte数组相互转化
- android 添加触摸反馈
- Linux下简写汇集
- struts2取得request,session,appilcation的方法
- IOS学习(二十一)block简单使用
- c++实现java synchronized关键字
- redhat 5.1安装gcc操作步骤
- Bootstrap学习---css
- [FUNC]测试是否联网
- 教女友学编程-2-先学爬虫
- 【易语言界面开发系列教程之(EX_UI使用系列教程--EX组件(一键换肤))】
- 1222