登錄與註冊（Struts2+mysql數據庫+Struts2框架校驗+過濾器Filter）

Struts2框架校驗：對jsp頁面的數據進行規範；

過濾器Filter：實現不登錄禁止訪問主頁面；

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項目結構：

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Struts2 jar包

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Action包下的  StrutsAction.java

package action;

import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import org.apache.struts2.ServletActionContext;
import com.opensymphony.xwork2.ActionSupport;

import domain.JDBC;
import domain.User;

public class StrutsAction extends ActionSupport {

	private static final long serialVersionUID = 7136705594241625207L;
	private User user;

	public User getUser() {
		return user;
	}

	public void setUser(User user) {
		this.user = user;
	}

	// 用戶登錄
	public String login() throws SQLException {
		System.out.println("login" + user);
		System.out.println("login的phone" + user.getPhone());

		int flag = 0; // 登錄成功與否的標準

		Connection conn = null;
		Statement stmt = null;
		ResultSet rs = null;

		try {
			String phone = user.getPhone(); // 獲取用戶手機號
			String password = user.getPassword(); // 獲取用戶密碼

			System.out.println("login_phone" + phone);
			System.out.println("login_password" + password);

			conn = JDBC.getConnection(); // 與數據庫建立連接

			String sql = "select * from user where phone='" + phone + "'"; // Sql查詢語句，查詢用戶手機號是否存在

			stmt = conn.createStatement();
			rs = stmt.executeQuery(sql); // 進行查詢

			if (rs.next()) {
				if (password.equals(rs.getString("password"))) { // 密碼相同

					User user = new User(); // 新建一個user對象
					user.setUsername(rs.getString("username")); // 將用戶的用戶名存入
					user.setPhone(rs.getString("phone")); // 將用戶的手機號存入
					// 將這個用戶存入seesion中
					ServletActionContext.getRequest().getSession().setAttribute("user", user);
					flag = 1; // 該用戶存在;
				}
			}

		} catch (SQLException e) {
			e.printStackTrace();
		} finally {
			rs.close();
			stmt.close();
			conn.close();
			System.out.println("mysql close");
		}
		if (flag == 1) {
			System.out.println("SUCCESS");
			return SUCCESS  ;
		}
		return ERROR;
	}

	// 用戶註冊
	public String register() throws SQLException {

		int flag = 0;
		System.out.println("register" + user);
		Connection conn = null;
		Statement stmt = null;

		try {

			String phone = user.getPhone();
			String password = user.getPassword();
			String username = user.getUsername();
			int isblacklist = 0; // 黑名單初始化爲0

			conn = JDBC.getConnection();

			String sql = "insert into user(phone,password,username,inblacklist)values('" + phone + "','" + password
					+ "','" + username + "','" + isblacklist + "')";

			stmt = conn.createStatement();
			flag = stmt.executeUpdate(sql);
		} catch (SQLException e) {
			e.printStackTrace();
		} finally {
			stmt.close();
			conn.close();
		}
		if (flag == 0)
			return ERROR;
		return SUCCESS;
	}

}

Action包下的  StrutsAction-User_login-validation.xml

<?xml version="1.0" encoding="UTF-8"?>
  <!DOCTYPE validators PUBLIC
  		"-//Apache Struts//XWork Validator 1.0.3//EN"
  		"http://struts.apache.org/dtds/xwork-validator-1.0.3.dtd">
 
<validators>
	<field name="user.phone">
		<field-validator type="requiredstring">
			<param name="trim">true</param>
			<message>手機號不能爲空!</message>
		</field-validator>
		<field-validator type="regex">
			<param name="regex"><![CDATA[^(13[0-9]|15[0|3|6|7|8|9]|18[8|9])\d{8}$]]></param>
			<message>請輸入正確的手機號</message>
		</field-validator>
	</field>	
	<field name="user.password">
		<field-validator type="requiredstring">
			<param name="trim">true</param>
			<message>密碼不能爲空</message>
		</field-validator>
		<field-validator type="stringlength">
			<param name="minLength">6</param>
			<param name="maxLength">20</param>
			<message>密碼長度必須在6到20位之間</message>
		</field-validator>
	</field>
</validators>

Action包下的  StrutsAction-register_login-validation.xml

<?xml version="1.0" encoding="UTF-8"?>
  <!DOCTYPE validators PUBLIC
  		"-//Apache Struts//XWork Validator 1.0.3//EN"
  		"http://struts.apache.org/dtds/xwork-validator-1.0.3.dtd">
 
<validators>
	<field name="user.phone">
		<field-validator type="requiredstring">
			<param name="trim">true</param>
			<message>手機號不能爲空!</message>
		</field-validator>
		<field-validator type="regex">
			<param name="regex"><![CDATA[^(13[0-9]|15[0|3|6|7|8|9]|18[8|9])\d{8}$]]></param>
			<message>請輸入正確的手機號</message>
		</field-validator>
	</field>
	<field name="user.username">
		<field-validator type="requiredstring">
			<param name="trim">true</param>
			<message>用戶名不能爲空!</message>
		</field-validator>
	</field>	
	<field name="user.password">
		<field-validator type="requiredstring">
			<param name="trim">true</param>
			<message>密碼不能爲空</message>
		</field-validator>
		<field-validator type="stringlength">
			<param name="minLength">6</param>
			<param name="maxLength">20</param>
			<message>密碼長度必須在6到20位之間</message>
		</field-validator>
	</field>
</validators>

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domain包下的 JDBC.java

package domain;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
 
public class JDBC
{    
	public static Connection getConnection()
	{
		//加載數據庫驅動  com.mysql.jdbc.Driver
        String driver = "com.mysql.cj.jdbc.Driver";
        //獲取mysql連接地址ַ
        String url = "jdbc:mysql://localhost:3306/Struts2?" +
        		"useUnicode=true&characterEncoding=utf8&" +
        		"useSSL=false&serverTimezone=UTC";
        //數據名稱
        String username = "root";
        //數據庫密碼
        String password = "258000";
        //獲取一個數據的連接
        Connection conn = null;
        //獲取連接的一個狀態
        try{
        	 Class.forName(driver); 
            //getConnection()方法，連接MySQL數據庫！
            conn=DriverManager.getConnection(url,username,password);
            if(conn!=null)
            System.out.println("mysql ok");
           // conn.close();
         }
        catch(ClassNotFoundException e)//數據庫驅動類異常處理
        { 
            System.out.println("數據庫驅動加載失敗！");
            e.printStackTrace();
        }
       catch(SQLException e1) //數據庫連接失敗異常處理
       {
    	   System.out.println("數據庫連接異常1！");
            e1.printStackTrace();
       }
       catch(Exception e2)
       {
    	   System.out.println("數據庫連接異常2！");
       	e2.printStackTrace();
       }
       finally
       {
    	   System.out.println("finally mysql ");
       }
        return conn;
	}
}

domain包下的 User.java

package domain;
 
public class User
{
	private String phone;
	private String username;
	private String password;
	private int isblacklist;
	
	public String getPhone() {
		return phone;
	}
	public void setPhone(String phone) {
		this.phone = phone;
	}
	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 int getIsblacklist() {
		return isblacklist;
	}
	public void setIsblacklist(int isblacklist) {
		this.isblacklist = isblacklist;
	}
	
	
	@Override
	public String toString() {
		return "User [phone=" + phone + ", username=" + username + ", password=" + password + ", isblacklist="
				+ isblacklist + "]";
	}
	
 
}

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filter包下的 LoginFilter.java

package 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;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import domain.User;

public class LoginFilter extends HttpServlet implements Filter {

	private static final long serialVersionUID = 1L;

	public void doFilter(ServletRequest Request, ServletResponse Response, FilterChain filterChain)
			throws IOException, ServletException {

		HttpServletRequest request = (HttpServletRequest) Request;
		HttpServletResponse response = (HttpServletResponse) Response;
		HttpSession session = request.getSession();
		String url = request.getServletPath();
		String contextPath = request.getContextPath();
		
		if (url.equals(""))
			url += "/";
		if ((url.startsWith("/") && !url.startsWith("/login"))) {
			if(!url.startsWith("/register"))
			{
				// 若訪問後臺資源
				// 過濾到login
				User user = (User) session.getAttribute("user");
				if (user == null) {// 轉入管理員登陸頁面
					response.sendRedirect(contextPath + "/login.jsp");
					return;
				}
			}		
		}
		filterChain.doFilter(Request, Response);
	}

	public void init(FilterConfig arg0) throws ServletException {
	}
}

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sturts.xml配置

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts PUBLIC
	"-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"
	"http://struts.apache.org/dtds/struts-2.3.dtd">

<struts>
	<package name="action" extends="struts-default" namespace="/">
		<!-- action配置 -->
		<!-- 登錄 -->
		<action name="User_login" class="action.StrutsAction" method="login">
			<result name="input">login.jsp</result>       <!-- 輸入錯誤重新到登錄頁面 -->
			<result name="error">register_fail.jsp</result> <!-- 註冊失敗到註冊失敗頁面 -->
			<result name="success">index.jsp</result>       <!-- 註冊成功後到登錄頁面 -->
			<result name="inblacklist">login_inblacklist.jsp</result>  <!-- 若用戶在黑名單中就到黑名單頁面 -->
		</action>

		<!-- 註冊 -->
		<action name="User_register" class="action.StrutsAction"
			method="register">
			<result name="input">register.jsp</result>      <!-- 輸入錯誤重新到註冊頁面 -->
			<result name="success">login.jsp</result>       <!-- 註冊成功後到登錄頁面 -->
			<result name="error">register_fail.jsp</result> <!-- 註冊失敗到註冊失敗頁面 -->
		</action>
	</package>
</struts>
 
 
 
 

web.xml配置：

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="3.0" xmlns="http://java.sun.com/xml/ns/javaee"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://java.sun.com/xml/ns/javaee 
	http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd">
	<display-name></display-name>
	<welcome-file-list>
		<welcome-file>register.jsp</welcome-file>
		<welcome-file>login.jsp</welcome-file>
	</welcome-file-list>
 
	<!-- Struts核心過濾器 -->
	<filter>
		<filter-name>Struts2</filter-name>
		<filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
 
	</filter>
	<filter-mapping>
		<filter-name>Struts2</filter-name>
		<url-pattern>/*</url-pattern>
	</filter-mapping>
	
	<!-- 實現頁面登錄過濾 -->
	<filter>
		<filter-name>loginFilter</filter-name>
		<!-- 實現登錄過濾LoginFilter全路徑 -->
		<filter-class>filter.LoginFilter</filter-class>
	</filter>
	<filter-mapping>
		<filter-name>loginFilter</filter-name>
		<url-pattern>*.action</url-pattern>
		<url-pattern>*.do</url-pattern>
		<url-pattern>*.jsp</url-pattern>
		<url-pattern>*.servlet</url-pattern>
		<url-pattern>*.class</url-pattern>
		<url-pattern>*.java</url-pattern>
	</filter-mapping>
 
</web-app>

 

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以下是jsp頁面：

login.jsp

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@taglib uri="/struts-tags" prefix="s"%>
<%
	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>註冊</title>

<link rel="stylesheet" type="text/css" href="CSS/reset.css" />
<link rel="stylesheet" type="text/css" href="CSS/style.css" />
</head>

<body>
	<div class="div2" style=" background:url('CSS/image/login.jpg')">
		<h1>LOGIN</h1>
		<div class="div1">
			<s:form cssClass="form" action="User_login" namespace="/" method="post" >
				<table>
					<tr>
						<s:textfield name="user.phone" cssClass="input" placeholder="phone"
							type="text"></s:textfield>
					</tr>
					<tr>
						<s:password name="user.password" cssClass="input"
							placeholder="password" type="password"></s:password>
					</tr>
					<tr>
						<s:submit value="登錄" type="submit" cssClass="input"></s:submit>
					</tr>
				</table>
			</s:form>
			<a href="register.jsp">註冊賬號</a>
		</div>
	</div>
</body>
</html>

register.jsp

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@taglib uri="/struts-tags" prefix="s"%>
<%
	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>註冊</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="CSS/reset.css" />
<link rel="stylesheet" type="text/css" href="CSS/style.css" />
</head>
 
<body>
	<div class="div2" style=" background:url('CSS/image/login.jpg')">
		<h1>Register</h1>
		<div class="div1">
			<s:form cssClass="form" action="User_register" namespace="/" method="post">
				<table Class="table">
					<tr>
						<s:textfield cssClass="input" name="user.phone"
							placeholder="phone" type="nunber"></s:textfield>
					</tr>
					<tr>
						<s:textfield cssClass="input" name="user.username"
							placeholder="username" type="text"></s:textfield>
					</tr>
					<tr>
						<s:textfield cssClass="input" name="user.password"
							placeholder="password" type="password">
						</s:textfield>
					</tr>
					<tr>
						<s:textfield cssClass="input" type="submit" value="提交"></s:textfield>
					</tr>
				</table>
			</s:form>
			<a href="login.jsp">我要登錄</a>
		</div>
	</div>
</body>
</html>