4月4日 JavaWeb 周三
2018-04-04 22:01
169 查看
登录页面
LoginServlet
success页面
error页面
show页面
showservlet
add页面
addservlet
delservlet
upd页面
updservlet
bye页面
elep
MyFilter
读书是学习，使用也是学习，而且是更重要的学习。
——毛泽东
<%@ 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 block
e.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()+"
18031
://"+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 block
e.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 block
e.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 block
e.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 block
e.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 stub
System.out.println("过滤器销毁");
}
public void doFilter(ServletRequest request, ServletResponse response,
FilterChain chain) throws IOException, ServletException {
// TODO Auto-generated method stub
System.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 stub
System.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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