SSH---ApplicationContext 基于Session的管理

最新推荐文章于 2022-10-24 15:23:07 发布

原创最新推荐文章于 2022-10-24 15:23:07 发布 · 564 阅读

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文章标签：

#session #action #spring #filter #import #class

本文介绍了如何在Web.xml中配置加载ApplicationContext.xml，并在Action基类中利用Servlet监听器将上下文保存到Session，以便在需要时从Session中获取。Action基类实现了ServletRequestAware, ServletResponseAware, SessionAware接口，提供了对请求、响应和Session的访问，同时提供了获取ApplicationContext的方法。" 91385152,7676821,C语言链表实现：录入学生信息并查找特定学号,"['C语言', '链表实现', '数据结构']

1. Web.xml 配置将ApplicationContext.xml读取到Session保存

<context-param>
  <param-name>contextConfigLocation</param-name>
  <param-value>classpath:applicationContext.xml</param-value>
</context-param>
<listener>
  <listener-class>
   org.springframework.web.context.ContextLoaderListener
  </listener-class>
</listener>
<filter>
        <filter-name>encodingFilter</filter-name>
        <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
        <init-param>
            <param-name>encoding</param-name>
            <param-value>UTF-8</param-value>
        </init-param>
    </filter>
    <filter-mapping>
        <filter-name>encodingFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>

2. 书写Action基类

Action基类必须继承ActionSupport ，实现spring的三个接口ServletRequestAware,ServletResponseAware,SessionAware。这三个结口提供了request、response、session的注入。

import java.util.Map;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.log4j.Logger;
import org.apache.struts2.interceptor.ServletRequestAware;
import org.apache.struts2.interceptor.ServletResponseAware;
import org.apache.struts2.interceptor.SessionAware;
import org.springframework.context.ApplicationContext;
import org.springframework.web.context.support.WebApplicationContextUtils;

import com.opensymphony.xwork2.ActionSupport;

public class BaseAction extends ActionSupport implements

ServletRequestAware,ServletResponseAware,SessionAware{
protected HttpServletRequest request;
protected HttpServletResponse response;
protected Map session;
protected Logger logger = Logger.getLogger(getClass());

public void setServletRequest(HttpServletRequest httpServletRequest) {
this.request = httpServletRequest;
}

public void setServletResponse(HttpServletResponse response) {
this.response = response;
}

public void setSession(Map session) {
this.session = session;
}

public ApplicationContext getContext() {

  ApplicationContext ctx = WebApplicationContextUtils
    .getRequiredWebApplicationContext(request.getSession()
      .getServletContext());
  return ctx;
}

}

3.以上代码提供了将ApplicationContext.xml读取到Session保存,然后又从session中读取ApplicationContext.xml的实现办法