struts2笔记关于request/response/session

最新推荐文章于 2022-02-25 20:00:37 发布

最新推荐文章于 2022-02-25 20:00:37 发布 · 102 阅读

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#Servlet #Apache #IOC #C #C++

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本文通过具体示例对比了Struts2框架中使用非IOC和IOC方式处理HTTP请求的区别。展示了如何在两种模式下进行Session管理、获取HttpServletRequest、HttpServletResponse等对象，并演示了如何设置和读取Session数据。

IocServlet.java。
package tutorial;

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

import org.apache.struts2.ServletActionContext;

import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionSupport;

publicclass NonIoCServlet extends ActionSupport {
    private String message;

    public String getMessage() {
        return message;
    }

    @Override
    public String execute() {
        ActionContext.getContext().getSession().put("msg", "Hello World from Session!");

        HttpServletRequest request = ServletActionContext.getRequest();
        HttpServletResponse response = ServletActionContext.getResponse();
        HttpSession session = request.getSession();

        StringBuffer sb =new StringBuffer("Message from request: ");
        sb.append(request.getParameter("msg"));
        sb.append("<br>Response Buffer Size: ");
        sb.append(response.getBufferSize());
        sb.append("<br>Session ID: ");
        sb.append(session.getId());

        message = sb.toString();
        return SUCCESS;
    }
}

Ioc方式

NonIoCServlet.java

package tutorial;

import java.util.Map;

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

import org.apache.struts2.interceptor.ServletRequestAware;
import org.apache.struts2.interceptor.ServletResponseAware;
import org.apache.struts2.interceptor.SessionAware;

import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionSupport;

publicclass IoCServlet extends ActionSupport implements SessionAware, ServletRequestAware, ServletResponseAware {
    private String message;
    private Map att;
    private HttpServletRequest request;
    private HttpServletResponse response;

    public String getMessage() {
        return message;
    }

    publicvoid setSession(Map att) {
        this.att = att;
    }

    publicvoid setServletRequest(HttpServletRequest request) {
        this.request = request;
    }

    publicvoid setServletResponse(HttpServletResponse response) {
        this.response = response;
    }

    @Override
    public String execute() {
        att.put("msg", "Hello World from Session!");

        HttpSession session = request.getSession();

        StringBuffer sb =new StringBuffer("Message from request: ");
        sb.append(request.getParameter("msg"));
        sb.append("<br>Response Buffer Size: ");
        sb.append(response.getBufferSize());
        sb.append("<br>Session ID: ");
        sb.append(session.getId());

        message = sb.toString();
        return SUCCESS;
    }
}