STRUTS2 ACTION 访问WEB元素的四种方式

1： Map IoC 方式

package com.action;

import java.util.Map;

import org.apache.struts2.interceptor.ApplicationAware;

import org.apache.struts2.interceptor.RequestAware;

import org.apache.struts2.interceptor.SessionAware;

import com.opensymphony.xwork2.ActionSupport;

public class UserAction1 extends ActionSupport implements RequestAware,SessionAware,ApplicationAware {

private Map<String, Object> request;

private Map<String, Object> session;

private Map<String, Object> application;

public String add(){

request.put("r1", "r1");

session.put("s1", "s1");

application.put("a1", "a1");

return "success";

}

public void setRequest(Map<String, Object> request) {

this.request=request;

}

public void setSession(Map<String, Object> session) {

this.session=session;

}

public void setApplication(Map<String, Object> application) {

this.application=application;

}

}

2： Map 依赖容器 方式:

package com.action;

import java.util.Map;

import com.opensymphony.xwork2.ActionContext;

import com.opensymphony.xwork2.ActionSupport;

public class UserAction2 extends ActionSupport {

private Map<String, Object> request;

private Map<String, Object> session;

private Map<String, Object> application;

public UserAction2() {

ActionContext context = ActionContext.getContext();

request=(Map<String, Object>)context.get("request");

session=context.getSession();

application=context.getApplication();

}

public String add(){

request.put("r2", "r2");

session.put("s2", "s2");

application.put("a2", "a2");

return "success";

}

}

3： Servlet IoC 方式：

package com.action;

import javax.servlet.ServletContext;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpSession;

import org.apache.struts2.interceptor.ServletRequestAware;

import com.opensymphony.xwork2.ActionSupport;

public class UserAction3 extends ActionSupport implements ServletRequestAware {

private HttpServletRequest request;

private HttpSession session;

private ServletContext application;

public String add() {

request.setAttribute("r3", "r3");

session.setAttribute("s3", "s3");

application.setAttribute("a3", "a3");

return "success";

}

public void setServletRequest(HttpServletRequest request) {

this.request=request;

this.session=request.getSession();

this.application=session.getServletContext();

}

}

4： Servlet 依赖容器 方式:


package com.action;




import javax.servlet.ServletContext;


import javax.servlet.http.HttpServletRequest;


import javax.servlet.http.HttpSession;


import org.apache.struts2.ServletActionContext;


import com.opensymphony.xwork2.ActionSupport;




public class UserAction4 extends ActionSupport {


private HttpServletRequest request;


private HttpSession session;


private ServletContext application;


public UserAction4() {


request = ServletActionContext.getRequest();


session=request.getSession();


application=session.getServletContext();


}


public String add(){


request.setAttribute("r4", "r4");


session.setAttribute("s4", "s4");


application.setAttribute("a4", "a4");


return "success";


}


}