struts2資料處理的幾種方式
阿新 • • 發佈:2018-11-28
package com.loaderman.c_data; import java.util.Map; import javax.servlet.ServletContext; import com.opensymphony.xwork2.ActionContext; import com.opensymphony.xwork2.ActionSupport; /** * 資料處理 * */ public class DataAction_bak extends ActionSupport{ @Override public String execute() throwsException { // 1. 請求資料封裝; 2. 呼叫Service處理業務邏輯,拿到結果資料 // 3. 資料儲存到域中 /* * // Struts中對資料操作,方式1: 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");*/ // 【推薦:解耦的方式實現對資料的操作】 // Struts中對資料操作,方式2: 通過ActionContext類 ActionContext ac = ActionContext.getContext(); // 得到Struts對HttpServletRequest物件進行了封裝,封裝為一個map // 拿到表示request物件的map Map<String,Object> request = ac.getContextMap(); // 拿到表示session物件的mapMap<String, Object> session = ac.getSession(); // 拿到表示servletContext物件的map Map<String, Object> application = ac.getApplication(); // 資料 request.put("request_data", "request_data1_actionContext"); session.put("session_data", "session_data1_actionContext"); application.put("application_data", "application_data1_actionContext"); return SUCCESS; } }
package com.loaderman.c_data; import com.opensymphony.xwork2.ActionSupport; import org.apache.struts2.interceptor.ApplicationAware; import org.apache.struts2.interceptor.RequestAware; import org.apache.struts2.interceptor.SessionAware; import java.util.Map; /** * 資料處理, 方式3: 實現介面的方法 */ 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執行時候,會把代表request的map物件注入 @Override public void setRequest(Map<String, Object> request) { this.request = request; } // 注入session @Override public void setSession(Map<String, Object> session) { this.session = session; } // 注入application @Override public void setApplication(Map<String, Object> application) { this.application = application; } @Override public String execute() throws Exception { // 資料 request.put("request_data", "request_data1_actionAware"); session.put("session_data", "session_data1_actionAware"); application.put("application_data", "application_data1_actionAware"); return SUCCESS; } }