servlet请求与响应的练习实例

发起请求的代码：

package com.dym.servlet;

import java.io.IOException;

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

public class LoginServlet extends HttpServlet {
	@Override
	protected void service(HttpServletRequest req, HttpServletResponse resp)
			throws ServletException, IOException {
		//设置响应编码格式
			resp.setContentType("text/html;charset=utf-8");
		//获取请求信息
		//处理请求
		//响应处理结果
			resp.getWriter().write("<html>");
			resp.getWriter().write("<head>");
			resp.getWriter().write("</head>");
			resp.getWriter().write("<body>");
			resp.getWriter().write("<form action='login' method='get'>");
			resp.getWriter().write("用户名：<input type='text' name='uname' value='' /><br/>");
			resp.getWriter().write("email：<input type='text' name='email' value='' /><br/>");
			resp.getWriter().write("<input type='submit'  value='登录' />");
			resp.getWriter().write("</form>");
			resp.getWriter().write("</body>");
			resp.getWriter().write("/<html>");
	}
}

响应请求的代码

package com.dym.servlet;

import java.io.IOException;

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

public class LoginServlet2 extends HttpServlet {
	@Override
	protected void service(HttpServletRequest req, HttpServletResponse resp)
			throws ServletException, IOException {
		//设置响应编码格式
			resp.setContentType("text/html;charset=utf-8");
		//获取请求信息
			String uname=req.getParameter("uname");
			String email=req.getParameter("email");
			resp.getWriter().write("<html>");
			resp.getWriter().write("<head>");
			resp.getWriter().write("</head>");
			resp.getWriter().write("<body>");
			resp.getWriter().write("<p>你的请求是：");
			resp.getWriter().write("</p>");
			resp.getWriter().write("<p>");
			resp.getWriter().write(uname+"你好");
			resp.getWriter().write("</p>");
			resp.getWriter().write("<p>");
			resp.getWriter().write("email= "+email);
			resp.getWriter().write("</p>");
			resp.getWriter().write("</body>");
			resp.getWriter().write("/<html>");
			
	}
}

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5">
  <display-name>04-Login</display-name>
  <servlet>
    <description>This is the description of my J2EE component</description>
    <display-name>This is the display name of my J2EE component</display-name>
    <servlet-name>LoginServlet</servlet-name>
    <servlet-class>com.dym.servlet.LoginServlet</servlet-class>
  </servlet>
  <servlet>
    <description>This is the description of my J2EE component</description>
    <display-name>This is the display name of my J2EE component</display-name>
    <servlet-name>LoginServlet2</servlet-name>
    <servlet-class>com.dym.servlet.LoginServlet2</servlet-class>
  </servlet>


  <servlet-mapping>
    <servlet-name>LoginServlet</servlet-name>
    <url-pattern>/page</url-pattern>
  </servlet-mapping>
  <servlet-mapping>
    <servlet-name>LoginServlet2</servlet-name>
    <url-pattern>/login</url-pattern>
  </servlet-mapping>
  <welcome-file-list>
    <welcome-file>index.html</welcome-file>
    <welcome-file>index.htm</welcome-file>
    <welcome-file>index.jsp</welcome-file>
    <welcome-file>default.html</welcome-file>
    <welcome-file>default.htm</welcome-file>
    <welcome-file>default.jsp</welcome-file>
  </welcome-file-list>
</web-app>

运行结果：

注：会出现乱码的现象，是由于浏览器的编码问题

servlet请求与响应的练习实例

发起请求的代码：

响应请求的代码

web.xml

运行结果：

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