Struts的數據處理方式

方式一：直接拿到ServletApi，執行操作

HttpServletRequest request = ServletActionContext.getRequest();Httpsession session = request.getSession();ServletContext application = ServletActionContext.getServletContext();// 操作request.setAttribute("request_data", "request_data1");session.setAttribute("session_data", "session_data1");application.setAttribute("application_data", "application_data1");
 
 
方式二：通過ActionContext類
ActionContext ac = ActionContext.getContext();// 得到Struts對HttpServletRequest對象進行了封裝，封裝為一個map// 拿到表示request對象的map 	Map<String,Object> request =  ac.getContextMap(); 	// 拿到表示session對象的map 	Map<String, Object> session = ac.getSession(); 	// 拿到表示servletContext對象的map 	Map<String, Object> application = ac.getApplication();  	// 數據 	request.put("request_data", "request_data1_actionContext");session.put("session_data", "session_data1_actionContext");application.put("application_data", "application_data1_actionContext");
 
方式三：實現接口RequestAware, SessionAware, ApplicationAware
public class DataAction extends ActionSupport implements RequestAware, SessionAware, ApplicationAware{PRivate Map<String, Object> request;private Map<String, Object> session;private Map<String, Object> application;// struts運行時候，會把代表request的map對象注入@Overridepublic void setRequest(Map<String, Object> request) {this.request = request;}// 注入session@Overridepublic void setSession(Map<String, Object> session) {this.session = session;}// 注入application@Overridepublic void setApplication(Map<String, Object> application) {this.application = application;}  @Overridepublic String execute() throws Exception { 	// 數據 	request.put("request_data", "request_data1_actionAware");session.put("session_data", "session_data1_actionAware");application.put("application_data", "application_data1_actionAware");//return SUCCESS;} }
 
 
注意：在非必要使用方式一的情況下，建議使用方式二或者方式三（因為方式二、方式三有很多方式一功能無法實現）（當類中有多個業務方法，建議使用方式二）