Struts的数据处理方式

Struts的数据处理方式

方式一：直接拿到ServletApi，执行操作

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：通过ActionContext类
ActionContext ac = ActionContext.getContext();
// 得到Struts对HttpServletRequest对象进行了封装，封装为一个map
// 拿到表示request对象的map
 	Map<String,Object> request =  ac.getContextMap();
 	// 拿到表示session对象的map
 	Map<String, Object> session = ac.getSession();
 	// 拿到表示servletContext对象的map
 	Map<String, Object> application = ac.getApplication();
 
 	// 数据
 	request.put("request_data", "request_data1_actionContext");
session.put("session_data", "session_data1_actionContext");
application.put("application_data", "application_data1_actionContext");


 
方式三：实现接口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运行时候，会把代表request的map对象注入
@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 {
 	// 数据
 	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况下，建议使用方式二或者方式三（因为方式二、方式三有很多方式一功能无法实现）（当类中有多个业务方法，建议使用方式二）