JSP第七次作业
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%@page import="java.sql.SQLException"%>
<%@page import="com.gd.dao.BaseDao"%>
<%@page import="com.gd.entity.Msg"%>
<%@page import="java.sql.DriverManager"%>
<%@page import="java.sql.PreparedStatement"%>
<%@page import="java.sql.ResultSet"%>
<%@page import="java.sql.Connection"%>
<body>
<%
String uname = request.getParameter("uname");
session.setAttribute("uname", uname);
Connection conn = null;
PreparedStatement ps = null;
ResultSet rs = null;
try {
Class.forName("com.mysql.jdbc.Driver");
//加载驱动
String url = "jdbc:mysql://localhost:3306/users";
String user = "root";
String password = "admin";
conn = DriverManager.getConnection(url, user, password);
ps = conn.prepareStatement("select * from msg where username=?");
ps.setString(1, uname);
rs = ps.executeQuery();
%>
<table>
<tr>
<td>msgid</td>
<td>username</td>
<td>title</td>
<td>msgcontent</td>
<td>state</td>
<td>sendto</td>
<td>msg_create_date</td>
</tr>
<%
while (rs.next()) {
%>
<tr>
<td><%=rs.getString("username")%></td>
<td><%=rs.getString("title")%></td>
<td><%=rs.getString("msgcontent")%></td>
<td>
<%
if (rs.getString("state").equals("1")) {
%> <input type="button" value="点击查看"
onclick="window.location.href='show.jsp';" /> <%
} else {
%>
<div align="center">
<%
out.print("已查看");
%>
</div> <%
}
%> <%
String title=rs.getString("title");
session.setAttribute("title", title);
%>
</td>
<td><%=rs.getString("sendto")%></td>
<td><%=rs.getString("msg_create_date")%></td>
</tr>
<%
}
%>
</table>
<br>
<%
} catch (Exception e) {
e.printStackTrace();
} finally {
if (rs != null) {
try {
rs.close();
} catch (SQLException e) { // ignore }
rs = null;
}
}
if (ps != null) {
try {
ps.close();
} catch (SQLException e) { // ignore }
ps = null;
}
}
if (conn != null) {
try {
conn.close();
} catch (SQLException e) { // ignore }
rs = null;
}
}
}
%>
</body>
</html>
<%@ 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 'index.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>
<form action="dologin.jsp" method="post">
用户名:<input type="text" name="uname" value="kitty" /><Br>
密码 ：<input type="password" name="upwd" value="123456"/><br>
<input type="submit" value="登录">
</form>
</body>
</html>
<%@page import="com.gd.dao.UsersDao"%>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%
request.setCharacterEncoding("utf-8");
String uname = request.getParameter("uname");
String upwd = request.getParameter("upwd");
UsersDao ud = new UsersDao();
if (ud.login(uname, upwd))
request.getRequestDispatcher("main.jsp").forward(request, response);
else
response.sendRedirect("index.jsp");
%>
package com.gd.entity;
public class Users {
String username;
String password;
String email;
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
}
package com.gd.entity;
public class Msg {
int msgid;
String usernname;
String title;
String msgcontent;
int state;
String sendto;
String msg_create_date;
public int getMsgid() {
return msgid;
}
public void setMsgid(int msgid) {
this.msgid = msgid;
}
public String getUsernname() {
return usernname;
}
public void setUsernname(String usernname) {
this.usernname = usernname;
}
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
public String getMsgcontent() {
return msgcontent;
}
public void setMsgcontent(String msgcontent) {
this.msgcontent = msgcontent;
}
public int getState() {
return state;
}
public void setState(int state) {
this.state = state;
}
public String getSendto() {
return sendto;
}
public void setSendto(String sendto) {
this.sendto = sendto;
}
public String getMsg_create_date() {
return msg_create_date;
}
public void setMsg_create_date(String msg_create_date) {
this.msg_create_date = msg_create_date;
}
}
package com.gd.dao;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
public class UsersDao extends BaseDao {
public boolean login(String uname, String upwd) throws SQLException {
Connection conn = getConnection();
String sql = "select * from users where username=? and password=?";
PreparedStatement ps = conn.prepareStatement(sql);
ps.setString(1, uname);
ps.setString(2, upwd);
ResultSet rs = ps.executeQuery();
if (rs.next()) {
realse(rs, ps, conn);
return true;
} else {
realse(rs, ps, conn);
return false;
}
}
}
package com.gd.dao;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
public class BaseDao {
// 获取连接
public Connection getConnection() {
Connection conn = null;
try {
Class.forName("com.mysql.jdbc.Driver");
// 2.建立连接
conn = DriverManager.getConnection(
"jdbc:mysql://localhost:3306/users", "root", "admin");
} catch (Exception e) {
e.printStackTrace();
}
return conn;
}
// 关闭连接
public static void realse(ResultSet rs, PreparedStatement ps, Connection conn) {
{
//6.关闭资源,释放资源
if (rs != null) {
try {
rs.close();
} catch (SQLException e) { // ignore }
rs = null;
}
}
if (ps != null) {
try {
ps.close();
} catch (SQLException e) { // ignore }
ps = null;
}
}
if (conn != null) {
try {
conn.close();
} catch (SQLException e) { // ignore }
rs = null;
}
}
}
}
}
