Struts对数据操作方式一：直接拿到servletAPI,执行操作
@Override
public String execute() throws Exception {
HttpServletRequest request = ServletActionContext.getRequest();
HttpSession session = request.getSession();
ServletContext application = ServletActionContext.getServletContext();
request.setAttribute("request_data","request_data");
session.setAttribute("session_data","session_data");
application.setAttribute("application_data","application_data");
return SUCCESS;
}
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"
"http://struts.apache.org/dtds/struts-2.3.dtd">
<struts>
<package name="data" namespace="/" extends="struts-default">
<global-results>
<result name="success">/data.jsp</result>
</global-results>
<action name="data" class="com.cx.Data.DataAction">
</action>
</package>
</struts>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>data</title>
</head>
<body>
data
<br>
${request_data}
<br>
${session_data}
<br>
${application_data}
</body>
</html>
方式二：通过ActionContext类-解耦方式-不引入servelt-api
//方式二
ActionContext ac = ActionContext.getContext();
Map<String , Object> request = ac.getContextMap();
Map<String, Object> session = ac.getSession();
Map<String ,Object> application = ac.getApplication();
request.put("request_data","request_data");
session.put("session_data","session_data");
application.put("application_data","application_data");
方式三：实现接口
package com.cx.Data;
import com.opensymphony.xwork2.ActionSupport;
import org.apache.struts2.interceptor.ApplicationAware;
import org.apache.struts2.interceptor.RequestAware;
import org.apache.struts2.interceptor.SessionAware;
import java.util.Map;
/**
* Created by cxspace on 16-7-10.
*/
public class DataAction extends ActionSupport implements RequestAware , SessionAware ,ApplicationAware{
private Map<String,Object> request;
private Map<String,Object> application;
private Map<String,Object> session;
/*
1.请求数据封装
2.调用service层处理业务逻辑，拿到结果数据
3.数据保存到域中
Struts对数据操作方式一：直接拿到servletAPI,执行操作
*/
@Override
public String execute() throws Exception {
request.put("request_data","request_data-方式三");
session.put("session_data","session_data-方式三");
application.put("application_data","application_data-方式三");
return SUCCESS;
}
@Override
public void setRequest(Map<String, Object> request) {
//struts运行的时候，会把代表request的map对象注入
this.request = request;
}
@Override
public void setApplication(Map<String, Object> application) {
this.application = application;
}
@Override
public void setSession(Map<String, Object> session) {
this.session = session;
}
}
总结方式1：直接通过ServletActionContext获取servelt-api 方式2：通过ActionContext获取不同的map
方式3：实现接口的方法 方式2 vs 方式3方式2适合业务方法少的方式3适合业务方法多的
时间： 2025-01-08 17:26:46