1．编写servlet程序，在页面上输出HelloWorld
要求：
（1）创建项目之后new—class，自行编写servlet程序，覆盖doGet及doPost方法
（2）在web.xml中配置<servlet>及<servlet-mapping>
2．编写servlet程序读取表单中的数据
<%@ page language="java" import="java.util.*" pageEncoding="GBK"%> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> </head> <body> <form method="post" action="ServletTest2"> <input type="text" name="text" /> <input type="submit" value="提交"> </form> </body> </html>
<?xml version="1.0" encoding="UTF-8"?> <web-app version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"> <servlet> <servlet-name>helloworld</servlet-name> <servlet-class>com.mars.ServletTest</servlet-class> </servlet> <servlet-mapping> <servlet-name>helloworld</servlet-name> <url-pattern>/helloworld</url-pattern> </servlet-mapping> <servlet-mapping> <servlet-name>helloworld</servlet-name> <url-pattern>/mars/firstTest</url-pattern> </servlet-mapping> <servlet> <servlet-name>ServletTest2</servlet-name> <servlet-class>com.mars.ServletTest2</servlet-class> </servlet> <servlet-mapping> <servlet-name>ServletTest2</servlet-name> <url-pattern>/ServletTest2</url-pattern> </servlet-mapping> </web-app>
package com.mars;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class ServletTest extends HttpServlet {
protected void doGet(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
PrintWriter out = resp.getWriter();
out.print("<html><head></head><body>hello world ~~mars</body></html>");
out.close();
}
/* protected void doPost(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
PrintWriter out = resp.getWriter();
out.print("<html><head></head><body>hello world ~~mars</body></html>");
out.close();
}*/
}
要求：
（1） 编写JSP页面，创建表单，表单中包含“文本框”及“提交”按钮
（2） 编写servlet程序，在程序中读取出用户在表单中输入的内容，并将其显示在页面上
（3） 创建servlet 程序时，可采用MyEclipse中直接new—servlet的方式
package com.mars;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class ServletTest2 extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html;charset=gbk");
PrintWriter out = response.getWriter();
System.out.println("in Get");
out.println("<HTML>");
out.println(" <HEAD></HEAD>");
out.println(" <BODY>");
out.println("从jsp页面，获取信息的示例");
out.println(request.getParameter("text"));
out.println(" </BODY>");
out.println("</HTML>");
out.flush();
out.close();
}
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
System.out.println("in Post");
doGet(request,response);
}
}