Linux開啟檔案數的限制
阿新 • • 發佈：2022-05-24
package com.entity;
import java.util.Date;
public class Email {
private Integer id;
private String fa;
private String shou;
private String title;
private Date time;
private String zhuang;
private String nei;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getFa() {
return fa;
}
public void setFa(String fa) {
this.fa = fa;
}
public String getShou() {
return shou;
}
public void setShou(String shou) {
this.shou = shou;
}
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
public Date getTime() {
return time;
}
public void setTime(Date time) {
this.time = time;
}
public String getZhuang() {
return zhuang;
}
public void setZhuang(String zhuang) {
this.zhuang = zhuang;
}
public String getNei() {
return nei;
}
public void setNei(String nei) {
this.nei = nei;
}
@Override
public String toString() {
return "Email [id=" + id + ", fa=" + fa + ", shou=" + shou + ", title="
+ title + ", time=" + time + ", zhuang=" + zhuang + ", nei="
+ nei + "]";
}
public Email(Integer id, String fa, String shou, String title, Date time,
String zhuang, String nei) {
super();
this.id = id;
this.fa = fa;
this.shou = shou;
this.title = title;
this.time = time;
this.zhuang = zhuang;
this.nei = nei;
}
public Email() {
super();
}
}
package com.entity;
public class User {
private Integer id;
private String uname;
private String password;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getUname() {
return uname;
}
public void setUname(String uname) {
this.uname = uname;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public User() {
super();
}
public User(Integer id, String uname, String password) {
super();
this.id = id;
this.uname = uname;
this.password = password;
}
}
package com.jdbc2;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
public class BaseDao {
//連線資料庫
public Connection getConnection() {
Connection con = null;
try {
Class.forName("com.mysql.jdbc.Driver");
con=DriverManager.getConnection("jdbc:mysql://localhost:3306/test","root","123456");
} catch (Exception e) {
e.printStackTrace();
}
return con;
}
//關閉資料庫
protected void closeAll(Connection con,PreparedStatement ps,ResultSet rs){
try {
if(rs != null)
rs.close();
if(ps != null)
ps.close();
if(con != null)
con.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
}
package com.jdbc2;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import com.entity.Email;
public class EmailDao extends BaseDao{
public List<Email> getAll(String uname){
List<Email>list=new ArrayList<Email>();
Connection con=getConnection();
PreparedStatement pred=null;
ResultSet resultSet=null;
String sql="select * from email where shou=?";
try {
pred=con.prepareStatement(sql);
pred.setString(1, uname);
resultSet=pred.executeQuery();
while(resultSet.next()){
Email email=new Email();
email.setId(resultSet.getInt(1));
email.setFa(resultSet.getString(2));
email.setShou(resultSet.getString(3));
email.setTitle(resultSet.getString(4));
email.setNei(resultSet.getString(5));
email.setTime(resultSet.getDate(6));
email.setZhuang(resultSet.getString(7));
list.add(email);
}
} catch (SQLException e) {
e.printStackTrace();
}
return list;
}
public void addEmail(Email e) {
Connection con = getConnection();
String sql = "insert into email(fa,shou,title,nei,time,zhuang) values(?,?,?,?,?,'0')";
PreparedStatement pred = null;
try {
pred = con.prepareStatement(sql);
pred.setString(1, e.getFa());
pred.setString(2, e.getShou());
pred.setString(3, e.getTitle());
pred.setString(4, e.getNei());
pred.setDate(5, new java.sql.Date(new Date().getTime()));
pred.executeUpdate();
} catch (SQLException e1) {
e1.printStackTrace();
} finally {
closeAll(con, pred, null);
}
}
public void del(int id) {
Connection con = getConnection();
String sql = "delete from email where id=?";
PreparedStatement pred = null;
try {
pred = con.prepareStatement(sql);
pred.setInt(1, id);
pred.executeUpdate();
} catch (SQLException e1) {
e1.printStackTrace();
} finally {
closeAll(con, pred, null);
}
}
public void update(int id) {
Connection con = getConnection();
String sql = "update email set zhuang='1' where id=?";
PreparedStatement pred = null;
try {
pred = con.prepareStatement(sql);
pred.setInt(1, id);
pred.executeUpdate();
} catch (SQLException e1) {
e1.printStackTrace();
} finally {
closeAll(con, pred, null);
}
}
public Email look(int id) {
Connection con = getConnection();
String sql = "select id,fa,shou,title,nei,time from email where id=?";
PreparedStatement pred = null;
ResultSet resultSet = null;
try {
pred = con.prepareStatement(sql);
pred.setInt(1, id);
resultSet = pred.executeQuery();
while (resultSet.next()) {
Email email = new Email();
email.setId(resultSet.getInt(1));
email.setFa(resultSet.getString(2));
email.setShou(resultSet.getString(3));
email.setTitle(resultSet.getString(4));
email.setNei(resultSet.getString(5));
email.setTime(resultSet.getDate(6));
return email;
}
} catch (SQLException e1) {
e1.printStackTrace();
} finally {
closeAll(con, pred, resultSet);
}
return null;
}
}
package com.jdbc2;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
public class UserDao extends BaseDao{
public int Register(String uname,String password){
int i=-1;
PreparedStatement pred=null;
Connection con=getConnection();
String sql="insert into user(uname,password)values(?,?)";
try {
pred= con.prepareStatement(sql);
pred.setString(1, uname);
pred.setString(2, password);
i=pred.executeUpdate();
} catch (SQLException e) {
e.printStackTrace();
}finally{
closeAll(con, pred, null);
}
return i;
}
public boolean Login(String uname,String password){
boolean f=false;
PreparedStatement pred=null;
ResultSet resultSet=null;
Connection con=getConnection();
String sql="select * from user where uname=? and password=?";
try {
pred=con.prepareStatement(sql);
pred.setString(1, uname);
pred.setString(2, password);
resultSet=pred.executeQuery();
while(resultSet.next()){
f=true;
}
} catch (SQLException e) {
e.printStackTrace();
}
return f;
}
}
package com.servlet;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
@WebServlet("/dodel.do")
public class DoDel extends HttpServlet {
/**
* Constructor of the object.
*/
public DoDel() {
super();
}
/**
* Destruction of the servlet. <br>
*/
public void destroy() {
super.destroy(); // Just puts "destroy" string in log
// Put your code here
}
/**
* The doGet method of the servlet. <br>
*
* This method is called when a form has its tag value method equals to get.
*
* @param request the request send by the client to the server
* @param response the response send by the server to the client
* @throws ServletException if an error occurred
* @throws IOException if an error occurred
*/
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doPost(request, response);
}
/**
* The doPost method of the servlet. <br>
*
* This method is called when a form has its tag value method equals to post.
*
* @param request the request send by the client to the server
* @param response the response send by the server to the client
* @throws ServletException if an error occurred
* @throws IOException if an error occurred
*/
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html,charset=utf-8");
request.setCharacterEncoding("utf-8");
response.setCharacterEncoding("utf-8");
com.jdbc2.EmailDao e=new com.jdbc2.EmailDao();
String id=request.getParameter("id");
int idd=Integer.parseInt(id);
e.del(idd);
request.getRequestDispatcher("main.jsp").forward(request, response);
}
/**
* Initialization of the servlet. <br>
*
* @throws ServletException if an error occurs
*/
public void init() throws ServletException {
// Put your code here
}
}
package com.servlet;
import java.io.IOException;
import java.io.PrintWriter;
import javax.jms.Session;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import com.jdbc2.UserDao;
@WebServlet("/dologin.do")
public class DoLogin extends HttpServlet {
/**
* Constructor of the object.
*/
public DoLogin() {
super();
}
/**
* Destruction of the servlet. <br>
*/
public void destroy() {
super.destroy(); // Just puts "destroy" string in log
// Put your code here
}
/**
* The doGet method of the servlet. <br>
*
* This method is called when a form has its tag value method equals to get.
*
* @param request
* the request send by the client to the server
* @param response
* the response send by the server to the client
* @throws ServletException
* if an error occurred
* @throws IOException
* if an error occurred
*/
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doPost(request, response);
}
/**
* The doPost method of the servlet. <br>
*
* This method is called when a form has its tag value method equals to
* post.
*
* @param request
* the request send by the client to the server
* @param response
* the response send by the server to the client
* @throws ServletException
* if an error occurred
* @throws IOException
* if an error occurred
*/
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html,charset=utf-8");
request.setCharacterEncoding("utf-8");
response.setCharacterEncoding("utf-8");
String uname = request.getParameter("uname");
String password = request.getParameter("password");
UserDao ud = new UserDao();
HttpSession session = request.getSession();
PrintWriter out = response.getWriter();
if (ud.Login(uname, password)) {
session.setAttribute("uname", uname);
request.getRequestDispatcher("index.jsp").forward(request, response);
} else {
out.print("登入失敗，即將調回登入頁.....");
response.setHeader("refresh", "2;url=login.jsp");
}
}
/**
* Initialization of the servlet. <br>
*
* @throws ServletException
* if an error occurs
*/
public void init() throws ServletException {
// Put your code here
}
}
package com.servlet;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import com.entity.Email;
import com.jdbc2.EmailDao;
@WebServlet("/dolook.do")
public class DoLook extends HttpServlet {
/**
* Constructor of the object.
*/
public DoLook() {
super();
}
/**
* Destruction of the servlet. <br>
*/
public void destroy() {
super.destroy(); // Just puts "destroy" string in log
// Put your code here
}
/**
* The doGet method of the servlet. <br>
*
* This method is called when a form has its tag value method equals to get.
*
* @param request
* the request send by the client to the server
* @param response
* the response send by the server to the client
* @throws ServletException
* if an error occurred
* @throws IOException
* if an error occurred
*/
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doPost(request, response);
}
/**
* The doPost method of the servlet. <br>
*
* This method is called when a form has its tag value method equals to
* post.
*
* @param request
* the request send by the client to the server
* @param response
* the response send by the server to the client
* @throws ServletException
* if an error occurred
* @throws IOException
* if an error occurred
*/
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html,charset=utf-8");
request.setCharacterEncoding("utf-8");
response.setCharacterEncoding("utf-8");
String id = request.getParameter("id");
int idd = Integer.parseInt(id);
EmailDao e = new EmailDao();
e.update(idd);
Email email = e.look(idd);
HttpSession session=request.getSession();
session.setAttribute("email", email);
request.getRequestDispatcher("look.jsp").forward(request, response);
}
/**
* Initialization of the servlet. <br>
*
* @throws ServletException
* if an error occurs
*/
public void init() throws ServletException {
// Put your code here
}
}
package com.servlet;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import com.jdbc2.UserDao;
@WebServlet("/doregister.do")
public class DoRegister extends HttpServlet {
/**
* Constructor of the object.
*/
public DoRegister() {
super();
}
/**
* Destruction of the servlet. <br>
*/
public void destroy() {
super.destroy(); // Just puts "destroy" string in log
// Put your code here
}
/**
* The doGet method of the servlet. <br>
*
* This method is called when a form has its tag value method equals to get.
*
* @param request the request send by the client to the server
* @param response the response send by the server to the client
* @throws ServletException if an error occurred
* @throws IOException if an error occurred
*/
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doPost(request, response);
}
/**
* The doPost method of the servlet. <br>
*
* This method is called when a form has its tag value method equals to post.
*
* @param request the request send by the client to the server
* @param response the response send by the server to the client
* @throws ServletException if an error occurred
* @throws IOException if an error occurred
*/
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html,charset=utf-8");
request.setCharacterEncoding("utf-8");
response.setCharacterEncoding("utf-8");
String uname = request.getParameter("uname");
String password = request.getParameter("password");
UserDao ud = new UserDao();
int i=ud.Register(uname, password);
PrintWriter out=response.getWriter();
if(i>0){
out.print("娉ㄥ唽鎴愬姛錛屽嵆灝嗚皟鍒扮櫥褰曢〉.....");
response.setHeader("refresh", "2;url=Login.jsp");
}else{
out.print("娉ㄥ唽澶辮觸錛屽嵆灝嗚皟鍒版敞鍐岄〉.....");
response.setHeader("refresh", "2;url=register.jsp");
}
}
/**
* Initialization of the servlet. <br>
*
* @throws ServletException if an error occurs
*/
public void init() throws ServletException {
// Put your code here
}
}
package com.servlet;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import com.entity.Email;
import com.jdbc2.EmailDao;
@WebServlet("/dowrite.do")
public class DoWrite extends HttpServlet {
/**
* Constructor of the object.
*/
public DoWrite() {
super();
}
/**
* Destruction of the servlet. <br>
*/
public void destroy() {
super.destroy(); // Just puts "destroy" string in log
// Put your code here
}
/**
* The doGet method of the servlet. <br>
*
* This method is called when a form has its tag value method equals to get.
*
* @param request the request send by the client to the server
* @param response the response send by the server to the client
* @throws ServletException if an error occurred
* @throws IOException if an error occurred
*/
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doPost(request, response);
}
/**
* The doPost method of the servlet. <br>
*
* This method is called when a form has its tag value method equals to post.
*
* @param request the request send by the client to the server
* @param response the response send by the server to the client
* @throws ServletException if an error occurred
* @throws IOException if an error occurred
*/
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html,charset=utf-8");
request.setCharacterEncoding("utf-8");
response.setCharacterEncoding("utf-8");
Email e=new Email();
HttpSession session=request.getSession();
String fa=(String)session.getAttribute("uname");
e.setFa(fa);
String shou=request.getParameter("shou");
e.setShou(shou);
String title=request.getParameter("title");
e.setTitle(title);
String nei=request.getParameter("nei");
e.setNei(nei);
EmailDao ed=new EmailDao();
ed.addEmail(e);
request.getRequestDispatcher("main.jsp").forward(request, response);
}
/**
* Initialization of the servlet. <br>
*
* @throws ServletException if an error occurs
*/
public void init() throws ServletException {
// Put your code here
}
}
<%@ page language="java" import="java.util.*" pageEncoding="ISO-8859-1"%>
<!DOCTYPE HTML >
<html>
<head>
<title>My JSP 'exit.jsp' starting page</title>
</head>
<body>
<%session.invalidate();
response.sendRedirect("login.jsp");
%>
</body>
</html>
<%@page import="com.entity.Email"%>
<%@page import="com.jdbc2.EmailDao"%>
<%@page import="com.jdbc2.UserDao"%>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<!DOCTYPE HTML>
<html>
<head>
<title></title>
</head>
<body>
<%
String uname = (String) session.getAttribute("uname");
EmailDao dao = new EmailDao();
List<Email> list = dao.getAll(uname);
%>
歡迎<%=uname%>
<a href="write1.jsp">寫郵件</a>
<a href="exit.jsp">退出登入</a>
<br>
<br>
<table border="1px" cellspacing="0" cellpadding="30px">
<thead></thead>
<tr>
<th>發件人</th>
<th>標題</th>
<th>時間</th>
<th>狀態</th>
<th>操作</th>
<th>操作</th>
</tr>
<tbody></tbody>
<%
for (int i = 0; i < list.size(); i++) {
%>
<tr>
<td><%out.print(list.get(i).getFa().toString()); %></td>
<td><a href="dolook.do?id=<%=list.get(i).getId() %>"><%out.print(list.get(i).getTitle().toString()); %></a></td>
<td><%out.print(list.get(i).getTime().toString()); %></td>
<td><%if(list.get(i).getZhuang().equals("0")){
out.print("<img src='img/2.png'></img>");
}else{
out.print("<img src='img/1.png'></img>");
}%>
<td><a href="write.jsp?uname=<%=list.get(i).getFa()%>">回覆</a></td>
<td><a href="dodel.do?id=<%=list.get(i).getId()%>">刪除</a></td>
</td>
</tr>
<%
}
%>
</table>
</body>
</html>
<%@page import="com.jdbc2.UserDao"%>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<!DOCTYPE HTML>
<html>
<head>
<title></title>
</head>
<body>
<h1>登入</h1>
<script>
function yz() {
if (form.uname.value == null) {
alert('使用者名稱不能為空');
return;
}
if (form.password.value == null) {
alert('密碼不能為空');
return;
}
if (form.uname.value != null && form.password.value != null) {
form.submit();
}
}
</script>
<form action="dologin.do" method="post" name="form">
<table>
<tr>
<td>使用者名稱</td>
<td><input type="text" name="uname"></td>
</tr>
<tr>
<td>密碼</td>
<td><input type="password" name="password"></td>
</tr>
<tr>
<td><input type="button" value="登入" onclick="yz()"></td>
<td><a href="register.jsp">註冊</a></td>
</tr>
</table>
</form>
</body>
</html>
<%@page import="com.jdbc2.EmailDao"%>
<%@page import="com.entity.Email"%>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<!DOCTYPE HTML>
<html>
<head>
<title>My JSP 'write.jsp' starting page</title>
</head>
<body>
<%
Email email=(Email)session.getAttribute("email");
%>
<table>
<tr>
<td>發件人:</td>
<td><input type="text" name="fa" style="border: none"
value="<%=email.getFa()%>">
</td>
</tr>
<tr>
<td>主題:</td>
<td><input type="text" name="title" style="border: none"
value="<%=email.getTitle()%>">
</td>
</tr>
<tr>
<td>時間:</td>
<td><input type="date" name="time" style="border: none"
value="<%=email.getTime()%>">
</td>
</tr>
<tr>
<td>收件人:</td>
<td><input type="text" name="shou" style="border: none"
value="<%=email.getShou()%>">
</td>
</tr>
<tr>
<td>內容:</td>
<td><div style="border: none;outline: none;overflow: inherit;">
<%=email.getNei()%></div>
</td>
</tr>
</table>
<a href="index.jsp">返回</a>
</body>
</html>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<!DOCTYPE HTML>
<html>
<head>
<title>註冊</title>
</head>
<body>
<h1>註冊</h1>
<script>
function yz() {
if (form.uname.value == "") {
alert('使用者名稱不能為空');
return;
}
if (form.password.value == "") {
alert('密碼不能為空');
return;
}
form.submit();
}
</script>
<form action="doregister.do" method="post" name="form">
<table>
<tr>
<td>使用者名稱</td>
<td><input type="text" name="uname">
</td>
</tr>
<tr>
<td>密碼</td>
<td><input type="password" name="password">
</td>
</tr>
<tr>
<td>
<input type="button" value="註冊" onclick="yz()">
</td>
<td>
<input type="submit" value="重置" >
</td>
</tr>
</table>
</form>
</body>
</html>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<!DOCTYPE HTML>
<html>
<head>
<title>My JSP 'write.jsp' starting page</title>
</head>
<body>
<form action="dowrite.do" method="post" name="form">
<table>
<tr>
<td>收件人</td>
<td><input type="text" name="shou">
</td>
</tr>
<tr>
<td>主題</td>
<td><input type="text" name="title">
</td>
</tr>
<tr>
<td>內容</td>
<td><textarea rows="6" cols="20" name="nei"></textarea>
</td>
</tr>
<tr>
<td><input type="submit" value="傳送">
</td>
</tr>
</table>
</form>
</body>
</html>