
2
实验?/p>
HTTP
请求对象的使?/p>
一?/p>
实验目的
1.
掌握如何获得请求参数?/p>
2
.
掌握如何检索请求头?/p>
3
.
了解如何通过请求对象获得客户信息?/p>
4.
重点掌握使用请求对象存储数据和请求转发?/p>
二.
实验内容
1.
通过查询串传递请求参数,并在
Servlet
中检索请求参?/p>
步骤
1
?/p>
编写下面?/p>
Servlet
?/p>
package com.demo;
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class HelloUserServlet extends HttpServlet{
public void service(HttpServletRequest request,
HttpServletResponse response)
throws ServletException, IOException{
String userName = request.getParameter("userName");
PrintWriter out = response.getWriter();
out.println("<html>");
out.println("<head>");
out.println("</head>");
out.println("<body>");
out.println("<h3>Hello, " +
userName
+ "</h3>");
out.println("</body>");
out.println("</html>");
}
}
步骤
2
?/p>
编译?/p>
Servlet
,然后修?/p>
web.xml
文件,将下面代码添加到其中:
<servlet>
<servlet-name>helloUserServlet</servlet-name>
<servlet-class>com.demo.HelloUserServlet </servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>helloUser</servlet-name>
<url-pattern> </url-pattern>