Struts2获取request三种方法
struts2里面有三种方法可以获取request,最好使用ServletRequestAware接口通过IOC机制注入Request对象。
在Action中获取request方法一:
在Action中的代码:
Map request = (Map)ActionContext.getContext().get("request");
List<Task> tasks = taskManager.findAll();
request.put("tasks", tasks);
在JSP页面中获取其中的值:
<s:iterator id="task" value="#request.tasks">
<tr class="table_header">
<td><s:property value="#task.tname"/></td>
<td><s:property value="#task.tuid"/></td>
<td><s:property value="#task.tstartTime"/></td>
<td><s:property value="#task.tendTime"/></td>
<td><s:property value="#task.tstate"/></td>
<td><input type="radio" id="choose" name="choose" onclick="getId(this.value)" value="<s:property value='#task.tid'/>"/></td>
</tr>
</s:iterator>
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方法二:通过ServletActionContext类来获取,使用struts2经验如果处理get传参是中文,只能使用该方法进行处理乱码问题
Action中代码:
HttpServletRequest request = ServletActionContext.getRequest();
request.setAttribute("username", "zhangsan");
在jsp中获取其中的值
<s:property value="#request.username">或者${requestScope.req}
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方法三:通过ServletRequestAware接口通过IOC机制注入Request对象
Action中的代码:
Action实现ServletRequestAware接口,实现接口中的方法
private HttpServletRequest request;
//实现接口中的方法
public void setServletRequest(HttpServletRequest request){
this.request = request;
}
//然后在execute()方法中就可以使用了
public String execute(){
request.setAttribute("username", "zhangsan");
request.getSession().getServletContext().getApplication(); //得到Application
}
该方法必须要实现,而且该方法是自动被调用
这个方法在被调用的过程中,会将创建好的request对象通过参数的方式传递给你,你可以用来赋给你本类中的变量,然后request就可以使用了
注意:setServletRequest()方法一定会再execute()方法被调用前执行
在jsp页面中获取其中的值
<s:property value="#request.task.tname"/>
/本篇文章来源于Java秀,原文出处:http://www.java.sh/article/jsp/1353.html
struts2超链接传值: <s:a href="info.action?id=%{#list.id}"> <s:property value="#list.title"/></s:a>
第一种方式,非IoC(Spring中的控制反转)方式:
Java代码
/**
* File Name:BaseAction.java * Version: * Date:2010-1-27 * Copyright Belongs To Musoon Corporation 2010
*/
package com.action;
import java.util.Map;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.struts2.ServletActionContext;
import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionSupport;
/**
* Project Name:ZhiMing ** Class Name:BaseAction
* Author:Musoon ** Created Time:2010-1-27 下午06:45:35
* Changed By:Musoon ** Changed Time:2010-1-27 下午06:45:35
* Changed Memo:
* @version
* Class Description:
*/
public class BaseAction extends ActionSupport {
private static final long serialVersionUID = 7620009925942346125L;
ActionContext context = ActionContext.getContext();
HttpServletRequest request = (HttpServletRequest) context.get(ServletActionContext.HTTP_REQUEST);
HttpServletResponse response = (HttpServletResponse) context.get(ServletActionContext.HTTP_RESPONSE);
Map session = context.getSession();
//SessionMap session = (SessionMap) context.get(ActionContext.SESSION);
}
/**
* File Name:BaseAction.java * Version: * Date:2010-1-27 * Copyright Belongs To Musoon Corporation 2010
*/
package com.action;
import java.util.Map;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.struts2.ServletActionContext;
import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionSupport;
/**
* Project Name:ZhiMing ** Class Name:BaseAction
* Author:Musoon ** Created Time:2010-1-27 下午06:45:35
* Changed By:Musoon ** Changed Time:2010-1-27 下午06:45:35
* Changed Memo:
* @version
* Class Description:
*/
public class BaseAction extends ActionSupport {
private static final long serialVersionUID = 7620009925942346125L;
ActionContext context = ActionContext.getContext();
HttpServletRequest request = (HttpServletRequest) context.get(ServletActionContext.HTTP_REQUEST);
HttpServletResponse response = (HttpServletResponse) context.get(ServletActionContext.HTTP_RESPONSE);
Map session = context.getSession();
//SessionMap session = (SessionMap) context.get(ActionContext.SESSION);
}
我们平常所说的session一般是HttpSession,但在struts2中被封装成了Map类型。
补充:Web开发 , Jsp ,