Struts中数据处理

/**
* 方式1:拿到servletApi,执行操作
 */
HttpServletRequest request = ServletActionContext.getRequest();
// 拿到request对象
HttpSession session = request.getSession();

// 拿到session对象

 /**
 * 
 * 方式2:通过ActionContext类: [解耦的方式实现对数据的操作]
 */
ActionContext context = ActionContext.getContext();
// 得到Struts对HttpServletRequest对象进行了封装,封装为一个map
Map<String, Object> request1 = context.getContextMap();
// 拿到request对象的map
Map<String, Object> session2 = context.getSession();
// 拿到session对象map
Map<String, Object> application = context.getApplication();
// 拿到servletContext对象的map
        

public class Struts_dataDemo1 extends ActionSupport implements RequestAware, SessionAware, ApplicationAware 

private Map<String, Object> application;
private Map<String, Object> session;
private Map<String, Object> request;

        /**
     * Struts运行时,会把application的map对象注入
     * 
     * @param arg0
     */
    public void setApplication(Map<String, Object> application) {
        this.application = application;
    }

    /**
     * Struts运行时,会把session的map对象注入
     * 
     * @param arg0
     */
    public void setSession(Map<String, Object> session) {
        this.session = session;
    }

    /**
     * Struts运行时,会把request的map对象注入
     * 
     * @param arg0
     */
    public void setRequest(Map<String, Object> request) {
        this.request = request;
    }