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servlet请求与响应的练习实例

發(fā)布時(shí)間：2025/4/16 编程问答 13 豆豆

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發(fā)起請(qǐng)求的代碼：

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 {@Overrideprotected void service(HttpServletRequest req, HttpServletResponse resp)throws ServletException, IOException {//設(shè)置響應(yīng)編碼格式resp.setContentType("text/html;charset=utf-8");//獲取請(qǐng)求信息//處理請(qǐng)求//響應(yīng)處理結(jié)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("用戶名：<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='登錄' />");resp.getWriter().write("</form>");resp.getWriter().write("</body>");resp.getWriter().write("/<html>");} }

響應(yīng)請(qǐng)求的代碼

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 {@Overrideprotected void service(HttpServletRequest req, HttpServletResponse resp)throws ServletException, IOException {//設(shè)置響應(yīng)編碼格式resp.setContentType("text/html;charset=utf-8");//獲取請(qǐng)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>你的請(qǐng)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>

運(yùn)行結(jié)果：

注：會(huì)出現(xiàn)亂碼的現(xiàn)象，是由于瀏覽器的編碼問題

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