struts2 获取 request、session、application 的四种方式
//获取 map 类型的 request、session、application
public class LoginAction1 extendsActionSupport {
private Map request;
private Map session;
private Map application;
publicLoginAction1() {
request= (Map)ActionContext.getContext().get("request");
session= ActionContext.getContext().getSession();
application= ActionContext.getContext().getApplication();
}
publicString execute() {
request.put("r1","r1");
session.put("s1","s1");
application.put("a1","a1");
returnSUCCESS;
}
}
//采用接口方式获得 map 类型的 request、session、application
public class LoginAction2 extendsActionSupport implements RequestAware,SessionAware, ApplicationAware {
private Map<String, Object> request;
private Map<String, Object> session;
private Map<String, Object> application;
//DIdependency injection
//IoCinverse of control
publicString execute() {
request.put("r1","r1");
session.put("s1","s1");
application.put("a1","a1");
returnSUCCESS;
}
@Override
publicvoid setRequest(Map<String, Object> request) {
this.request= request;
}
@Override
publicvoid setSession(Map<String, Object> session) {
this.session= session;
}
@Override
publicvoid setApplication(Map<String, Object> application) {
this.application= application;
}
}
//获取 Http 类型的 request、session、application
public class LoginAction3 extendsActionSupport {
private HttpServletRequest request;
private HttpSession session;
private ServletContext application;
publicLoginAction3() {
request= ServletActionContext.getRequest();
session= request.getSession();
application= session.getServletContext();
}
publicString execute() {
request.setAttribute("r1","r1");
session.setAttribute("s1","s1");
application.setAttribute("a1","a1");
returnSUCCESS;
}
}
//采用接口方式获取 Http 类型的 request、session、application
public class LoginAction4 extendsActionSupport implements ServletRequestAware {
private HttpServletRequest request;
private HttpSession session;
private ServletContext application;
publicString execute() {
request.setAttribute("r1","r1");
session.setAttribute("s1","s1");
application.setAttribute("a1","a1");
returnSUCCESS;
}
@Override
publicvoid setServletRequest<a href="https://beatree.cn/tag/struts" title="查看更多关于 struts 的文章" target="_blank">struts</a>2.x<a href="https://beatree.cn/tag/struts" title="查看更多关于 struts 的文章" target="_blank">struts</a>(HttpServletRequest request) {
this.request= request;
this.session= request.getSession();
this.application= session.getServletContext();
}
}
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