4月4日 JavaWeb 周三

登录页面

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html><head><base href="<%=basePath%>"><title>My JSP 'login.jsp' starting page</title><meta http-equiv="pragma" content="no-cache"><meta http-equiv="cache-control" content="no-cache"><meta http-equiv="expires" content="0">    <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"><meta http-equiv="description" content="This is my page"><!--<link rel="stylesheet" type="text/css" href="styles.css">--></head><body><center><h2>欢迎进入登录页面</h2><form action="/demo15_myproject/login" method="post">账号:<input type="text" name="zhang"><br>密码:<input type="text" name="mima"><br><input type="submit" value="提交"></form></center></body>
</html>

LoginServlet

package com.www.servlet;import java.io.IOException;
import java.io.PrintWriter;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;import com.mysql.jdbc.Driver;public class LoginServlert extends HttpServlet {public void doGet(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {String zhangs = request.getParameter("zhang");String mimas = request.getParameter("mima");try {Class.forName("com.mysql.jdbc.Driver");Connection con = DriverManager.getConnection("jdbc:mysql://localhost:3306/login", "root", "root");String sql ="select * from user03 where id = ? and pwd = ?";PreparedStatement pst = con.prepareStatement(sql);pst.setString(1, zhangs);pst.setString(2, mimas);ResultSet rs = pst.executeQuery();if(rs.next()){System.out.println("登录成功");String name = rs.getString(2);request.setAttribute("name", name);request.getRequestDispatcher("/success.jsp").forward(request, response);}else{System.out.println("登录失败");response.sendRedirect("/demo15_myproject/error.jsp");}} catch (Exception e) {// TODO Auto-generated catch blocke.printStackTrace();}}public void doPost(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {doGet(request, response);}}

success页面

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html><head><base href="<%=basePath%>"><title>My JSP 'success.jsp' starting page</title><meta http-equiv="pragma" content="no-cache"><meta http-equiv="cache-control" content="no-cache"><meta http-equiv="expires" content="0">    <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"><meta http-equiv="description" content="This is my page"><!--<link rel="stylesheet" type="text/css" href="styles.css">--></head><body><center><h2>登录成功</h2><br><h3>欢迎${name}</h3><h4>您的IP为${str}</h4><a href="/demo15_myproject/show">点击查看列表信息</a></center></body>
</html>

error页面

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html><head><base href="<%=basePath%>"><title>My JSP 'error.jsp' starting page</title><meta http-equiv="pragma" content="no-cache"><meta http-equiv="cache-control" content="no-cache"><meta http-equiv="expires" content="0">    <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"><meta http-equiv="description" content="This is my page"><!--<link rel="stylesheet" type="text/css" href="styles.css">--></head><body><center><h2>登录失败</h2><a href="/demo15_myproject/login.jsp">返回</a></center></body>
</html>

show页面

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html><head><base href="<%=basePath%>"><title>My JSP 'show.jsp' starting page</title><meta http-equiv="pragma" content="no-cache"><meta http-equiv="cache-control" content="no-cache"><meta http-equiv="expires" content="0">    <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"><meta http-equiv="description" content="This is my page"><!--<link rel="stylesheet" type="text/css" href="styles.css">--></head><body><center><h1>展示页面</h1><table border="1px" ><tr><td>编号</td><td>姓名</td><td>性别</td><td>电话</td><td>班级</td><td>年龄</td><td>工资</td><th><a href="/demo15_myproject/add.jsp">增加</a>(<a href="/demo15_myproject/upd.jsp">修改</a>)</th></tr><c:forEach var="li" items="${list00}"><tr><th>${li.eid}</th><th>${li.ename}</th><th>${li.sex}</th><th>${li.tel}</th><th>${li.classid}</th><th>${li.age}</th><th>${li.sal}</th><th><a href="/demo15_myproject/del?w=${li.eid}">删除</a></th></tr></c:forEach></table><a href="/demo15_myproject/bye.jsp">退出</a></center></body>
</html>

showservlet

package com.www.servlet;import java.io.IOException;
import java.io.PrintWriter;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.util.ArrayList;
import java.util.List;import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;import com.www.bean.Elep;public class ShowServlet extends HttpServlet {public void doGet(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {List list = new ArrayList();try {Class.forName("com.mysql.jdbc.Driver");Connection con = DriverManager.getConnection("jdbc:mysql://localhost:3306/login", "root", "root");String sql = "select * from t_temp;";PreparedStatement pst = con.prepareStatement(sql);ResultSet rs = pst.executeQuery();while(rs.next()){String eids = rs.getString(1);String enames = rs.getString(2);String sexs = rs.getString(3);String tels = rs.getString(4);String classids = rs.getString(5);String ages = rs.getString(6);String sals = rs.getString(7);Elep el = new Elep(eids,enames,sexs,tels,classids,ages,sals);list.add(el);}request.setAttribute("list00", list);request.getRequestDispatcher("/show.jsp").forward(request, response);} catch (Exception e) {// TODO Auto-generated catch blocke.printStackTrace();}}public void doPost(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {doGet(request, response);}}

add页面

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html><head><base href="<%=basePath%>"><title>My JSP 'add.jsp' starting page</title><meta http-equiv="pragma" content="no-cache"><meta http-equiv="cache-control" content="no-cache"><meta http-equiv="expires" content="0">    <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"><meta http-equiv="description" content="This is my page"><!--<link rel="stylesheet" type="text/css" href="styles.css">--></head><body><center><form action="/demo15_myproject/add" method="post">账号:<input type="text" name="zhang"><br>姓名:<input type="text" name="ming"><br>性别:<input type="text" name="bie"><br>电话:<input type="text" name="dian"><br>单位:<input type="text" name="dan"><br>年龄:<input type="text" name="nian"><br>工资:<input type="text" name="gong"><br><input type="submit" value="添加"></form></center></body>
</html>

addservlet

package com.www.servlet;import java.io.IOException;
import java.io.PrintWriter;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;public class AddServlet extends HttpServlet {public void doGet(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {String zhangs = request.getParameter("zhang");String mings = request.getParameter("ming");String bies = request.getParameter("bie");String dians = request.getParameter("dian");String dans = request.getParameter("dan");String nians = request.getParameter("nian");String gongs = request.getParameter("gong");try {Class.forName("com.mysql.jdbc.Driver");Connection con = DriverManager.getConnection("jdbc:mysql://localhost:3306/login", "root", "root");String sql = "insert into t_temp values(?,?,?,?,?,?,?);";PreparedStatement pst = con.prepareStatement(sql);pst.setString(1, zhangs);pst.setString(2, mings);pst.setString(3, bies);pst.setString(4, dians);pst.setString(5, dans);pst.setString(6, nians);pst.setString(7, gongs);int x = pst.executeUpdate();if(x>0){response.sendRedirect("/demo15_myproject/show");}} catch (Exception e) {// TODO Auto-generated catch blocke.printStackTrace();}}public void doPost(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {doGet(request, response);}}

delservlet

package com.www.servlet;import java.io.IOException;
import java.io.PrintWriter;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;public class DelServlet extends HttpServlet {public void doGet(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {String shan = request.getParameter("w");try {Class.forName("com.mysql.jdbc.Driver");Connection con = DriverManager.getConnection("jdbc:mysql://localhost:3306/login", "root", "root");String sql = "delete from t_temp where eid = ?";PreparedStatement pst = con.prepareStatement(sql);pst.setString(1, shan);int x = pst.executeUpdate();if(x>0){response.sendRedirect("/demo15_myproject/show");}} catch (Exception e) {// TODO Auto-generated catch blocke.printStackTrace();}}public void doPost(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {doGet(request, response);}}

upd页面

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html><head><base href="<%=basePath%>"><title>My JSP 'upd.jsp' starting page</title><meta http-equiv="pragma" content="no-cache"><meta http-equiv="cache-control" content="no-cache"><meta http-equiv="expires" content="0">    <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"><meta http-equiv="description" content="This is my page"><!--<link rel="stylesheet" type="text/css" href="styles.css">--></head><body><center><form action="/demo15_myproject/upd" method="post">账号:<input type="text" name="zhangu"><br>姓名:<input type="text" name="mingu"><br>性别:<input type="text" name="bieu"><br>电话:<input type="text" name="dianu"><br>单位:<input type="text" name="danu"><br>年龄:<input type="text" name="nianu"><br>工资:<input type="text" name="gongu"><br><input type="submit" value="修改"></form></center>    </body>
</html>

updservlet

package com.www.servlet;import java.io.IOException;
import java.io.PrintWriter;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;public class UpdServlet extends HttpServlet {public void doGet(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {String mingu = request.getParameter("mingu");String bieu = request.getParameter("bieu");String dianu = request.getParameter("dianu");String danu = request.getParameter("danu");String nianu = request.getParameter("nianu");String gongu = request.getParameter("gongu");String zhangu = request.getParameter("zhangu");try {Class.forName("com.mysql.jdbc.Driver");Connection con = DriverManager.getConnection("jdbc:mysql://localhost:3306/login", "root", "root");String sql = "update t_temp set ename=?,sex=?,tel=?,classid=?,age=?,sal=? where eid=?;";PreparedStatement pst = con.prepareStatement(sql);pst.setString(1, mingu);pst.setString(2, bieu);pst.setString(3, dianu);pst.setString(4, danu);pst.setString(5, nianu);pst.setString(6, gongu);pst.setString(7, zhangu);int x = pst.executeUpdate();if(x>0){response.sendRedirect("/demo15_myproject/show");}} catch (Exception e) {// TODO Auto-generated catch blocke.printStackTrace();}}public void doPost(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {doGet(request, response);}}

bye页面

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html><head><base href="<%=basePath%>"><title>My JSP 'bye.jsp' starting page</title><meta http-equiv="pragma" content="no-cache"><meta http-equiv="cache-control" content="no-cache"><meta http-equiv="expires" content="0">    <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"><meta http-equiv="description" content="This is my page"><!--<link rel="stylesheet" type="text/css" href="styles.css">--></head><body><center><h1>再见</h1></center></body>
</html>

elep

package com.www.bean;public class Elep {//属性String eid;String ename;String sex;String tel;String classid;String age;String sal;//构造方法public Elep(String eid, String ename, String sex, String tel,String classid, String age, String sal) {super();this.eid = eid;this.ename = ename;this.sex = sex;this.tel = tel;this.classid = classid;this.age = age;this.sal = sal;}//设值取值public String getEid() {return eid;}public void setEid(String eid) {this.eid = eid;}public String getEname() {return ename;}public void setEname(String ename) {this.ename = ename;}public String getSex() {return sex;}public void setSex(String sex) {this.sex = sex;}public String getTel() {return tel;}public void setTel(String tel) {this.tel = tel;}public String getClassid() {return classid;}public void setClassid(String classid) {this.classid = classid;}public String getAge() {return age;}public void setAge(String age) {this.age = age;}public String getSal() {return sal;}public void setSal(String sal) {this.sal = sal;}}

MyFilter

package com.www.Filter;import java.io.IOException;import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;public class MyFilter implements Filter{public void destroy() {// TODO Auto-generated method stubSystem.out.println("过滤器销毁");}public void doFilter(ServletRequest request, ServletResponse response,FilterChain chain) throws IOException, ServletException {// TODO Auto-generated method stubSystem.out.println("过滤器运行");request.setCharacterEncoding("utf-8");response.setCharacterEncoding("utf-8");response.setContentType("text/html;charset=utf-8");String str1 = request.getLocalAddr();//本地String str = request.getRemoteAddr();request.setAttribute("str", str);chain.doFilter(request, response);System.out.println(str1);}public void init(FilterConfig arg0) throws ServletException {// TODO Auto-generated method stubSystem.out.println("过滤器启动");}}

读书是学习，使用也是学习，而且是更重要的学习。
——毛泽东

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