示例代码: [color=red](注:request,sesssion,application用MaP集合存)
[/color] public class UserAction extends ActionSupport { private String username; private String password; private Map<String ,Object> request; private Map<String ,Object> session; private Map<String ,Object> application; public String login(){ //获取对象 ActionContext ac=ActionContext.getContext(); [color=red][size=large]request=(Map<String, Object>) ac.get("request");[/size][/color]//request对象必须用参数“request”获取 session=ac.getSession(); application=ac.getApplication(); //保存数据 request.put("loginCity", 北京"); session.put("username", username); application.put("online", "在线人数:XXX"); return SUCCESS; } //setter/getter方法省略 }
页面:用<s:property value="#request.loginCity"/> 抬头导入struts标签库
二。使用Ioc方式
使用哪个对象,则实现哪个接口,实现接口后实现接口的方法,把参数的值赋给成员变量
示例:action代码:
public class UserAction extends ActionSupport implements RequestAware,SessionAware,ApplicationAware{ private String username; private String password; private Map<String ,Object> request; private Map<String ,Object> session; private Map<String ,Object> application; public String login(){ //保存数据 request.put("loginCity", 北京"); session.put("username", username); application.put("online", "在线人数:XXX"); return SUCCESS; } public void setRequest(Map<String, Object> request) { this.request=request; } public void setSession(Map<String, Object> session) { this.session=session; } public void setApplication(Map<String, Object> application) { this.application=application; } //setter/getter方法 }
页面如第一方法所示