利用ServletContext对象实现多个Servlet之间的数据共享

最新推荐文章于 2023-06-28 23:54:06 发布

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最新推荐文章于 2023-06-28 23:54:06 发布

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分类专栏：小例子Demo

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本文介绍了如何使用ServletContext对象在多个Servlet之间实现数据共享，通过HttpServletResponse接口进行响应处理。

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import java.io.IOException;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class ServletDemo1 extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
ServletContext sc = getServletContext();
sc.setAttribute("p", "pp");
response.getOutputStream().write("放了".getBytes());
}
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doGet(request, response);
}
}

import java.io.IOException;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

public class ServletDemo4 extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
ServletContext sc = getServletContext();
String obj = (String) sc.getAttribute("p");
response.getOutputStream().write(obj.getBytes());
}
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doGet(request, response);
}
}