struts之Action中获取request、response对象的方法

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1、访问或添加request/session/application属性

public String scope() throws Exception{

ActionContext ctx = ActionContext.getContext();

ctx.getApplication().put("app", "应用范围");//往ServletContext里放入app

ctx.getSession().put("ses", "session范围");//往session里放入ses

ctx.put("req", "request范围");//往request里放入req

return "scope";

}

JSP:

<body>

${applicationScope.app}

${sessionScope.ses}

${requestScope.req}

</body>

2、获取HttpServletRequest/HttpSession/ServletContext/HttpServletResponse对象

方法一、通过ServletActionContext类直接获取：

public String rsa() throws Exception{

HttpServletRequest request = ServletActionContext.getRequest();

ServletContext servletContext =ServletActionContext.getServletContext();

request.getSession();

HttpServletResponse response = ServletActionContext.getResponse();

return "scope";

}

方法二、实现指定接口，由struts框架运行时注入：

public class HelloWorldAction implementsServletRequestAware, ServletResponseAware, ServletContextAware{

private HttpServletRequest request;

private ServletContext servletContext;

private HttpServletResponse response;

public void setServletRequest(HttpServletRequest req) {

this.request=req;

}

public void setServletResponse(HttpServletResponse res) {

this.response=res;

}

public void setServletContext(ServletContext ser) {

this.servletContext=ser;

}

代码

package com.ljq.action;

import java.util.Arrays;

import javax.servlet.ServletContext;

importjavax.servlet.http.HttpServletRequest;

import org.apache.struts2.ServletActionContext;

importcom.opensymphony.xwork2.ActionContext;

public class HelloWorldAction {

//在页面中采用以下el表达式输出

//第一种

//${applicationScope.app}

//${sessionScope.ses}

//${requestScope.req}

//第二种

//${app}

//${ses}

//${req}

public String list() {

ActionContext ctx =ActionContext.getContext();

ctx.getApplication().put("app","应用范围");// 往ServletContext里放入application

ctx.getSession().put("ses","session范围");// 往session里放入session

ctx.put("req", "request范围");// 往request里放入request

ctx.put("names",Arrays.asList("张三", "李四", "王五"));

return "message";

}

//在页面中采用以下el表达式输出

//第一种

//${applicationScope.app}

//${sessionScope.ses}

//${requestScope.req}

//第二种

//${app}

//${ses}

//${req}

public String get() throws Exception {

HttpServletRequest request =ServletActionContext.getRequest();

ServletContext servletContext =ServletActionContext.getServletContext();

request.setAttribute("req","请求范围属性");

request.getSession().setAttribute("ses","会话范围属性");

servletContext.setAttribute("app","应用范围属性");

// HttpServletResponse response =ServletActionContext.getResponse();

return "message";

}

jsp代码

${applicationScope.app}

${sessionScope.ses}

${requestScope.req}

===========

${app}

${ses}

${req}

===========

<c:forEach items="${names}"var="name">

${name }

</c:forEach>

HttpServletRequest request =ServletActionContext.getRequest();

HttpSessionsession = request.getSession();

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