12月9日 自查后续

在上次登陆的基础上加上了公文的变化系统

package com.hjf.dao;

import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.ArrayList;
import java.util.List;

import com.hjf.entity.Course;
import com.hjf.util.DBUtil;

/**
 * 课程Dao
 * Dao层操作数据
 * @author Hu
 *
 */
public class CourseDao {

    /**
     * 添加
     * @param course
     * @return
     */
    public boolean add(Course course) {
        String sql = "insert into gongwen(leibie,biaoti,main) values('" + course.getLeibie() + "','" + course.getBiaoti() + "','" + course.getMain() + "')";
        //创建数据库链接
        Connection conn = DBUtil.getConn();
        Statement state = null;
        boolean f = false;
        int a = 0;
        
        try {
            state = conn.createStatement();
            state.executeUpdate(sql);
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            //关闭连接
            DBUtil.close(state, conn);
        }
        
        if (a > 0) {
            f = true;
        }
        return f;
    }

    /**
     * 删除
     * 
     * @param id
     * @return
     */
    public boolean delete (int id) {
        boolean f = false;
        String sql = "delete from gongwen where id='" + id + "'";
        
        Connection conn = DBUtil.getConn();
        Statement state = null;
        int a = 0;
        
        try {
            state = conn.createStatement();
            a = state.executeUpdate(sql);
        } catch (SQLException e) {
            e.printStackTrace();
        } finally {
            DBUtil.close(state, conn);
        }
        
        if (a > 0) {
            f = true;
        }
        return f;
    }

    /**
     * 修改
     * @param name
     * @param pass
     */
    public boolean update(Course course) {
        String sql = "update gongwen set leibie='" + course.getLeibie() + "', biaoti='" + course.getBiaoti() + "', main='" + course.getMain()
            + "' where id='" + course.getId() + "'";
        Connection conn = DBUtil.getConn();
        Statement state = null;
        boolean f = false;
        int a = 0;

        try {
            state = conn.createStatement();
            a = state.executeUpdate(sql);
        } catch (SQLException e) {
            e.printStackTrace();
        } finally {
            DBUtil.close(state, conn);
        }
        
        if (a > 0) {
            f = true;
        }
        return f;
    }
    
    /**
     * 验证课程名称是否唯一
     * true --- 不唯一
     * @param name
     * @return
     */
    public boolean leibie(String biaoti) {
        boolean flag = false;
        String sql = "select biaoti from gongwen where biaoti = '" + biaoti + "'";
        Connection conn = DBUtil.getConn();
        Statement state = null;
        ResultSet rs = null;
        
        try {
            state = conn.createStatement();
            rs = state.executeQuery(sql);
            while (rs.next()) {
                flag = true;
            }
        } catch (SQLException e) {
            e.printStackTrace();
        } finally {
            DBUtil.close(rs, state, conn);
        }
        return flag;
    }
    
    /**
     * 通过ID得到课程信息
     * @param id
     * @return
     */
    public Course getCourseById(int id) {
        String sql = "select * from gongwen where id ='" + id + "'";
        Connection conn = DBUtil.getConn();
        Statement state = null;
        ResultSet rs = null;
        Course course = null;
        
        try {
            state = conn.createStatement();
            rs = state.executeQuery(sql);
            while (rs.next()) {
                String leibie = rs.getString("leibie");
                String biaoti = rs.getString("biaoti");
                String main = rs.getString("main");
                
                
                course = new Course(id, leibie,biaoti,main);
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            DBUtil.close(rs, state, conn);
        }
        
        return course;
    }
    
    /**
     * 通过name得到Course
     * @param name
     * @return
     */
    public Course getCourseByName(String biaoti) {
        String sql = "select * from gongwen where biaoti ='" + biaoti + "'";
        Connection conn = DBUtil.getConn();
        Statement state = null;
        ResultSet rs = null;
        Course course = null;
        
        try {
            state = conn.createStatement();
            rs = state.executeQuery(sql);
            while (rs.next()) {
                int id = rs.getInt("id");
                
                String leibie = rs.getString("leibie");
                String main = rs.getString("main");
                
                
                course = new Course(id,leibie,biaoti,main);
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            DBUtil.close(rs, state, conn);
        }
        
        return course;
    }
    
    /**
     * 查找
     * @param name
     * @param teacher
     * @param classroom
     * @return
     */
    public List<Course> search(String leibie, String biaoti, String main) {
        String sql = "select * from gongwen where ";
        
        if (leibie != "") {
            sql += "sex like '%" + leibie + "%'";
        }
        if (biaoti != "") {
            sql += "minzu like '%" + biaoti + "%'";
        }
        if (main != "") {
            sql += "zhuce like '%" + main + "%'";
        }
        
        List<Course> list = new ArrayList<>();
        Connection conn = DBUtil.getConn();
        Statement state = null;
        ResultSet rs = null;

        try {
            state = conn.createStatement();
            rs = state.executeQuery(sql);
            Course bean = null;
            while (rs.next()) {
                int id = rs.getInt("id");
                String leibie2 = rs.getString("leibie");
                String biaoti2 = rs.getString("biaoti");
                String main2 = rs.getString("main");
                
                
                bean = new Course(id, leibie2, biaoti2, main2);
                list.add(bean);
            }
        } catch (SQLException e) {
            e.printStackTrace();
        } finally {
            DBUtil.close(rs, state, conn);
        }
        
        return list;
    }
    
    /**
     * 全部数据
     * @param name
     * @param teacher
     * @param classroom
     * @return
     */
    public List<Course> list() {
        String sql = "select * from gongwen";
        List<Course> list = new ArrayList<>();
        Connection conn = DBUtil.getConn();
        Statement state = null;
        ResultSet rs = null;

        try {
            state = conn.createStatement();
            rs = state.executeQuery(sql);
            Course bean = null;
            while (rs.next()) {
                int id = rs.getInt("id");
                String leibie2 = rs.getString("leibie");
                String biaoti2 = rs.getString("biaoti");
                String main2 = rs.getString("main");
                
                
                bean = new Course(id, leibie2, biaoti2, main2);
                list.add(bean);
            }
        } catch (SQLException e) {
            e.printStackTrace();
        } finally {
            DBUtil.close(rs, state, conn);
        }
        
        return list;
    }

}

package com.hjf.entity;

public class Course {

    private int id;
    private String leibie;
    private String biaoti;
    private String main;
    
    
    public int getId() {
        return id;
    }
    public void setId(int id) {
        this.id = id;
    }
    public String getLeibie() {
        return leibie;
    }
    public void setLeibie(String leibie) {
        this.leibie = leibie;
    }
    public String getBiaoti() {
        return biaoti;
    }
    public void setBiaoti(String biaoti) {
        this.biaoti = biaoti;
    }
    public String getMain() {
        return main;
    }
    public void setMain(String main) {
        this.main = main;
    }
    
    public Course() {}
    
    public Course(int id, String leibie, String biaoti, String main) {
        this.id = id;
        this.leibie = leibie;
        this.biaoti = biaoti;
        this.main = main;
        
        
    }
    
    public Course(String leibie, String biaoti, String main) {
        
        this.leibie = leibie;
        this.biaoti = biaoti;
        this.main = main;
    }
}

package com.hjf.service;

import java.util.List;

import com.hjf.dao.CourseDao;
import com.hjf.entity.Course;

/**
 * CourseService
 * 服务层
 * @author Hu
 *
 */
public class CourseService {

    CourseDao cDao = new CourseDao();
    
    /**
     * 添加
     * @param course
     * @return
     */
    public boolean add(Course course) {
        boolean f = false;
        if(!cDao.leibie(course.getBiaoti())) {
            cDao.add(course);
            f = true;
        }
        return f;
    }
    
    /**
     * 删除
     */
    public void del(int id) {
        cDao.delete(id);
    }
    
    /**
     * 修改
     * @return 
     */
    public void update(Course course) {
        cDao.update(course);
    }
    
    /**
     * 通过ID得到一个Course
     * @return 
     */
    public Course getCourseById(int id) {
        return cDao.getCourseById(id);
    }

    /**
     * 通过Name得到一个Course
     * @return 
     */
    public Course getCourseByName(String biaoti) {
        return cDao.getCourseByName(biaoti);
    }
    
    /**
     * 查找
     * @return 
     */
    public List<Course> search(String leibie, String biaoti, String main) {
        return cDao.search( leibie,biaoti,main);
    }
    
    /**
     * 全部数据
     * @return 
     */
    public List<Course> list() {
        return cDao.list();
    }
}

package com.hjf.servlet;

import java.io.IOException;
import java.util.List;

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.hjf.entity.Course;
import com.hjf.service.CourseService;

@WebServlet("/CourseServlet")
public class CourseServlet extends HttpServlet {
    
    private static final long serialVersionUID = 1L;

    CourseService service = new CourseService();
    
    /**
     * 方法选择
     */
    protected void service(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        req.setCharacterEncoding("utf-8");
        String method = req.getParameter("method");
        
        if ("add".equals(method)) {
            add(req, resp);
        } else if ("del".equals(method)) {
            del(req, resp);
        } else if ("update".equals(method)) {
            update(req, resp);
        } else if ("search".equals(method)) {
            search(req, resp);
        } else if ("getcoursebyid".equals(method)) {
            getCourseById(req, resp);
        } else if ("getcoursebyname".equals(method)) {
            getCourseByName(req, resp);
        } else if ("list".equals(method)) {
            list(req, resp);
        }
    }

    /**
     * 添加
     * @param req
     * @param resp
     * @throws IOException 
     * @throws ServletException 
     */
    private void add(HttpServletRequest req, HttpServletResponse resp) throws IOException, ServletException {
        req.setCharacterEncoding("utf-8");
        //获取数据
        String leibie = req.getParameter("leibie");
        String biaoti = req.getParameter("biaoti");
        String main = req.getParameter("main");
        
        Course course = new Course(leibie,biaoti,main);
        
        //添加后消息显示
        if(service.add(course)) {
            req.setAttribute("message", "添加成功");
            req.getRequestDispatcher("add.jsp").forward(req,resp);
        } else {
            req.setAttribute("message", "公文标题重复，请重新录入");
            req.getRequestDispatcher("add.jsp").forward(req,resp);
        }
    }
    
    /**
     * 全部
     * @param req
     * @param resp
     * @throws ServletException 
     */
    private void list(HttpServletRequest req, HttpServletResponse resp) throws IOException, ServletException{
        req.setCharacterEncoding("utf-8");
        
        List<Course> courses = service.list();
        req.setAttribute("courses", courses);
        req.getRequestDispatcher("list.jsp").forward(req,resp);
    }

    /**
     * 通过ID得到Course
     * @param req
     * @param resp
     * @throws ServletException 
     */
    private void getCourseById(HttpServletRequest req, HttpServletResponse resp) throws IOException, ServletException{
        req.setCharacterEncoding("utf-8");
        int id = Integer.parseInt(req.getParameter("id"));
        Course course = service.getCourseById(id);
        req.setAttribute("course", course);
        req.getRequestDispatcher("detail2.jsp").forward(req,resp);
    }

    /**
     * 通过名字查找
     * 跳转至删除
     * @param req
     * @param resp
     * @throws IOException
     * @throws ServletException 
     */
    private void getCourseByName(HttpServletRequest req, HttpServletResponse resp) throws IOException, ServletException{
        req.setCharacterEncoding("utf-8");
        String biaoti = req.getParameter("biaoti");
        Course course = service.getCourseByName(biaoti);
        if(course == null) {
            req.setAttribute("message", "查无此公文！");
            req.getRequestDispatcher("del.jsp").forward(req,resp);
        } else {
            req.setAttribute("course", course);
            req.getRequestDispatcher("detail.jsp").forward(req,resp);
        }
    }
    
    /**
     * 删除
     * @param req
     * @param resp
     * @throws IOException
     * @throws ServletException 
     */
    private void del(HttpServletRequest req, HttpServletResponse resp) throws IOException, ServletException{
        req.setCharacterEncoding("utf-8");
        int id = Integer.parseInt(req.getParameter("id"));
        service.del(id);
        req.setAttribute("message", "删除成功！");
        req.getRequestDispatcher("del.jsp").forward(req,resp);
    }
    
    /**
     * 修改
     * @param req
     * @param resp
     * @throws IOException
     * @throws ServletException 
     */
    private void update(HttpServletRequest req, HttpServletResponse resp) throws IOException, ServletException{
        req.setCharacterEncoding("utf-8");
        int id = Integer.parseInt(req.getParameter("id"));
        String leibie = req.getParameter("leibie");
        String biaoti = req.getParameter("biaoti");
        String main = req.getParameter("main");
        
        Course course = new Course(id,leibie,biaoti,main);
        
        
        service.update(course);
        req.setAttribute("message", "修改成功");
        req.getRequestDispatcher("CourseServlet?method=list").forward(req,resp);
    }
    
    /**
     * 查找
     * @param req
     * @param resp
     * @throws ServletException 
     */
    private void search(HttpServletRequest req, HttpServletResponse resp) throws IOException, ServletException{
        req.setCharacterEncoding("utf-8");
        String leibie = req.getParameter("leibie");
        String biaoti = req.getParameter("biaoti");
        String main = req.getParameter("main");
        
        List<Course> courses = service.search(leibie,biaoti,main);
        req.setAttribute("courses", courses);
        req.getRequestDispatcher("searchlist.jsp").forward(req,resp);
    }
}

package com.hjf.util;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;

/**
 * 数据库连接工具
 * @author Hu
 *
 */
public class DBUtil {
    
    public static String db_url = "jdbc:mysql://localhost:3306/user";
    public static String db_user = "root";
    public static String db_pass = "root";
    
    public static Connection getConn () {
        Connection conn = null;
        
        try {
            Class.forName("com.mysql.jdbc.Driver");//加载驱动
            conn = DriverManager.getConnection(db_url, db_user, db_pass);
        } catch (Exception e) {
            e.printStackTrace();
        }
        
        return conn;
    }
    
    /**
     * 关闭连接
     * @param state
     * @param conn
     */
    public static void close (Statement state, Connection conn) {
        if (state != null) {
            try {
                state.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
        
        if (conn != null) {
            try {
                conn.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
    }
    
    public static void close (ResultSet rs, Statement state, Connection conn) {
        if (rs != null) {
            try {
                rs.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
        
        if (state != null) {
            try {
                state.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
        
        if (conn != null) {
            try {
                conn.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
    }

    public static void main(String[] args) throws SQLException {
        Connection conn = getConn();
        PreparedStatement pstmt = null;
        ResultSet rs = null;
        String sql ="select * from course";
        pstmt = conn.prepareStatement(sql);
        rs = pstmt.executeQuery();
        if(rs.next()){
            System.out.println("空");
        }else{
            System.out.println("不空");
        }
    }
}

package dao;

import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;

import entry.user;
import util.DBUtil;

public class userDao {
    //
    
        
        
        public static boolean id(String id,String pwd) {
            boolean f = false;
            String sql = "select * from denglu where id = '" + id + "' and password = '"+pwd+"'";
            //
            Connection conn = DBUtil.getConn();
            Statement state = null;
            ResultSet rs = null;       
            try {
                state = conn.createStatement();
                rs = state.executeQuery(sql);
                if (rs.next()) {
                    f = true;
                }
            } catch (SQLException e) {
                e.printStackTrace();
            } finally {
                DBUtil.close(rs, state, conn);
            }
            return f;
        }
}

package entry;

public class user {
private String id;
private String password;



public String getId() {
    return id;
}
public void setId(String id) {
    this.id = id;
}
public String getPassword() {
    return password;
}
public void setPassword(String password) {
    this.password = password;
}

public user(){}
public user( String password) {
    
    this.password = password;
};
public user(String id, String password) {
    super();
    this.id = id;
    this.password = password;
    
}
}

package servlet;

import java.io.IOException;
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 dao.userDao;
import entry.user;


/**
 * Servlet implementation class AddServlet
 */
@WebServlet("/AddServlet")
public class AddServlet extends HttpServlet {
    private static final long serialVersionUID = 1L;
       
    /**
     * @see HttpServlet#HttpServlet()
     */
   
        
        
        protected void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
             request.setCharacterEncoding("utf-8");
             //
             String id = request.getParameter("id");
             String password = request.getParameter("password");
             
           
             
            
              System.out.println(id);
             System.out.println(password);
             if(userDao.id(id,password)) {
                 request.setAttribute("message", "登录成功");
                 request.getRequestDispatcher("chenggong.jsp").forward(request,response);
             } else {
                 request.setAttribute("message", "登录失败");
                 request.getRequestDispatcher("houtai.jsp").forward(request,response);
             }
        }
        
        
        
        protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

            doGet(request, response);
        }

    


    /**
     * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
     */
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        // TODO Auto-generated method stub
        response.getWriter().append("Served at: ").append(request.getContextPath());
    }

    /**
     * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
     */


}

package util;
 
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
 
/*
 * 鏁版嵁搴撹繛鎺ュ伐鍏�
 */
public class DBUtil {
     
    public static String db_url = "jdbc:mysql://localhost:3306/user?useSSL=false";
    public static String db_user = "root";
    public static String db_pass = "root";
     
    public static Connection getConn () {
        Connection conn = null;
         
        try {
            Class.forName("com.mysql.jdbc.Driver");//鍔犺浇椹卞姩
            conn = DriverManager.getConnection(db_url, db_user, db_pass);
        } catch (Exception e) {
            e.printStackTrace();
        }
         
        return conn;
    }
     
    /*10鍏抽棴杩炴帴*/
    public static void close (Statement state, Connection conn) {
        if (state != null) {
            try {
                state.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
         
        if (conn != null) {
            try {
                conn.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
    }
     
    public static void close (ResultSet rs, Statement state, Connection conn) {
        if (rs != null) {
            try {
                rs.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
         
        if (state != null) {
            try {
                state.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
         
        if (conn != null) {
            try {
                conn.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
    }
 
    public static void main(String[] args) throws SQLException {
        Connection conn = getConn();
        PreparedStatement pstmt = null;
        ResultSet rs = null;
        String sql ="select * from user";
        pstmt = conn.prepareStatement(sql);
        rs = pstmt.executeQuery();
        if(rs.next()){
            System.out.println("123");
        }else{
            System.out.println("456");
        }
    }
}

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>

</head>
<body>
    <%
         Object message = request.getAttribute("message");
         if(message!=null && !"".equals(message)){
     
    %>
         <script type="text/javascript">
              alert("<%=request.getAttribute("message")%>");
         </script>
    <%} %>
    <div align="center">
        <h1 style="color: black;">公文信息录入</h1>
        <a href="chenggong.jsp">返回主页</a>
        <form action="CourseServlet?method=add" method="post" onsubmit="return check()">
            <div class="a">
                公文类别<input type="text" id="leibie" name="leibie"/>
            </div>
            <div class="a">
                公文标题<input type="text" id="biaoti" name="biaoti" />
            </div>
            <div class="a">
                公文内容<input type="text" id="main" name="main" />
            </div>
            <div class="a">
                <button type="submit" class="b">保&nbsp;&nbsp;&nbsp;存</button>
            </div>
        </form>
    </div>
    <script type="text/javascript">
        function check() {
            var leibie = document.getElementById("leibie");;
            var main = document.getElementById("main");
            var biaoti = document.getElementById("biaoti");
            
            
            //非空
            if(leibie.value == '') {
                alert('公文类别为空');
                leibie.focus();
                return false;
            }
            if(main.value == '') {
                alert('公文内容为空');
                main.focus();
                return false;
            }if(biaoti.value == '') {
                alert('公文标题为空');
                main.focus();
                return false;
            }
            
            
        }
    </script>
</body>
</html>

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>公文系统</title>

</head>
<body>
    <div align="center">  
        
        <div class="a">
            <a href="add.jsp">公文信息登记</a>
        </div>
        <div class="a">
            <a href="CourseServlet?method=list">公文信息修改</a>
        </div>
        <div class="a">
            <a href="del.jsp">公文信息删除</a>
        </div>
        <div class="a">
            <a href="search.jsp">公文信息查询</a>
        </div>
    </div>
</body>
</html>

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>

</head>
<body>
    <%
         Object message = request.getAttribute("message");
         if(message!=null && !"".equals(message)){
     
    %>
         <script type="text/javascript">
              alert("<%=request.getAttribute("message")%>");
         </script>
    <%} %>
    <div align="center">
        <h1 style="color: black;">公文信息删除</h1>
        <a href="chenggong.jsp">返回主页</a>
        <form action="CourseServlet?method=getcoursebyname" method="post" onsubmit="return check()">
            <div class="a">
                公文标题<input type="text" id="biaoti" name="biaoti"/>
            </div>
            <div class="a">
                <button type="submit" class="b">查&nbsp;&nbsp;&nbsp;找</button>
            </div>
        </form>
    </div>
    <script type="text/javascript">
        function check() {
            var biaoti = document.getElementById("biaoti");;
            
            //非空
            if(biaoti.value == '') {
                alert('公文标题为空');
                biaoti.focus();
                return false;
            }
        }
    </script>
</body>
</html>

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
<style>
    .a{
        margin-top: 20px;
    }
    .b{
        font-size: 20px;
        width: 160px;
        color: white;
        background-color: greenyellow;
    }
    .tb, td {
        border: 1px solid black;
        font-size: 22px;
    }
</style>
</head>
<body>
    <div align="center">
        <h1 style="color: black;">公文信息删除</h1>
        <a href="chenggong.jsp">返回主页</a>
        <table class="tb">
            <tr>
                <td>公文类别</td>
                <td>${course.leibie}</td>
            </tr>
            <tr>
                <td>公文标题</td>
                <td>${course.biaoti}</td>
            </tr>
            <tr>
                <td>公文内容</td>
                <td>${course.main}</td>
            </tr>
            
        </table>
        <div class="a">
            <a onclick="return check()" href="CourseServlet?method=del&id=${course.id}">删&nbsp;&nbsp;&nbsp;除</a>
        </div>
    </div>
    <script type="text/javascript">
        function check() {
            if (confirm("真的要删除吗？")){
                return true;
            }else{
                return false;
            }
        }
    </script>
</body>
</html>

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>

</head>
<body>
    <%
         Object message = request.getAttribute("message");
         if(message!=null && !"".equals(message)){
     
    %>
         <script type="text/javascript">
              alert("<%=request.getAttribute("message")%>");
         </script>
    <%} %>
    <div align="center">
        <h1 style="color: black;">公文信息修改</h1>
        <a href="chenggong.jsp">返回主页</a>
        <form action="CourseServlet?method=update" method="post" onsubmit="return check()">
            <div class="a">
                公文类别<input type="text" id="leibie" name="leibie" value="${course.leibie}"/>
            </div>
            <div class="a">
                公文标题<input type="text" id="biaoti" name="biaoti" value="${course.biaoti}"/>
            </div>
            <div class="a">
                公文内容<input type="text" id="main" name="main" value="${course.main}"/>
            </div>
            
            <input type="hidden" id="id" name="id" value="${course.id}"/>
            <div class="a">
                <button type="submit" class="b">修&nbsp;&nbsp;&nbsp;改</button>
            </div>
        </form>
    </div>
    <script type="text/javascript">
        function check() {
            var leibie = document.getElementById("leibie");;
            var biaoti = document.getElementById("biaoti");
            var main = document.getElementById("main");
            
            
            //非空
            if(leibie.value == '') {
                alert('公文类别为空');
                leibie.focus();
                return false;
            }
            if(main.value == '') {
                alert('公文内容为空');
                main.focus();
                return false;
            }if(biaoti.value == '') {
                alert('公文标题为空');
                main.focus();
                return false;
            }
        }
    </script>
</body>
</html>

<%@ page language="java" contentType="text/html; charset=utf-8"
    pageEncoding="utf-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Insert title here</title>
</head>
<body>
<%
         Object message = request.getAttribute("message");
         if(message!=null && !"".equals(message)){
     
    %>
         <script type="text/javascript">
              alert("<%=request.getAttribute("message")%>");
         </script>
    <%} %>
    <div align="center">
        <h6 style="color: black;">管理员登陆</h6>
     
        <form name = "form1" action=AddServlet method="post" onsubmit="return check_submit()">
    <table>
            <tr>
                <td>登陆账号</td>
                <td colspan="2"> <input type="text" id="id" name="id"  maxlength="12" onblur="blur_id()" onfocus="focus_id()"/></td>
                <td width="300"><div id="result"></td>
            </tr>
            <tr>
                <td>登陆密码</td>
                <td colspan="2"> <input type="password" id="password" name="password" onblur="blur_pass()" onfocus="focus_pass()" /></td>
                <td width="300"><div id="result1"></td>
            </tr>
            <tr><td>验证码</td>
            <td>
            
     <input type="text" value="" placeholder="请输入验证码（区分大小写）" 
     style="height:20px;position: relative; font-size:16px;"id ="text">
     <canvas id="canvas" width="110" height="30" onclick="dj()" 
      style="border: 1px solid #ccc;
        border-radius: 5px;"></canvas>
     <button type=submit
     class="btn" onclick="sublim()">提交</button>

            </td>
   
            </tr>
        
            


    </table>
    </form>
    </div>
    <script type="text/javascript">
/*
    表单验证
*/
var flag = true;   // flag 如果为true（即用户名合法）就允许表单提交， 如果为false（即用户名不合法）阻止提交
/*function focus_pass()
{
    var nameObj = document.getElementById("result1");
    nameObj.innerHTML = "由六位字符和数字组成";
    nameObj.style.color="#999";
    }
function blur_pass()
{
    var nameObj = document.getElementById("result1");
    // 判断用户名是否合法
    var str2 = check_user_pass(document.form1.password.value);
    nameObj.style.color="red";
    if ("密码合法" ==  str2)
    {
        flag = true;
        nameObj.innerHTML = str2;
    }
    else
    {
        nameObj.innerHTML = str2;
    }
}

function check_user_pass(str)
{  var str2 = "密码合法";
if ("" == str)
{
    str2 = "密码为空";
    return str2;
}
else if (str.length!=6)
{
    str2 = "用户名应是六位组成";
    return str2;
}
else if (!check_word(str))
{
    str2 = "未含有英文字符";
    return str2;
}

return str2;
    
    
    }





function focus_id()
{
    var nameObj = document.getElementById("result");
    nameObj.innerHTML = "由六到十二英文字符和数字组成";
    nameObj.style.color="#999";
    }
function blur_id()
{
    var nameObj = document.getElementById("result");
    // 判断用户名是否合法
    var str2 = check_user_id(document.form1.id.value);
    nameObj.style.color="red";
    if ("用户名合法" ==  str2)
    {
        flag = true;
        nameObj.innerHTML = str2;
    }
    else
    {
        nameObj.innerHTML = str2;
    }
}

function check_user_id(str)
{
    var str2 = "用户名合法";
    if ("" == str)
    {
        str2 = "用户名号为空";
        return str2;
    }
    else if ((str.length<=4)||(str.length>=12))
    {
        str2 = "用户名应是六到十二位组成";
        return str2;
    }
    else if (!check_word(str))
    {
        str2 = "未含有英文字符";          
        return str2;
    }
    else if(!check_firstword(str))
    {
        str2 = "必须以英文字母开头";
        return str2;
    }
    return str2;
}


function check_firstword(str)
{   var arr = ["a", "b", "c", "d", "e", "f", "g", "h","i","j", "k", "l", "m", "n", "o", "p", "q","r", "s", "t", "u", "v", "w", "x", "y","z","A", "B", "C", "D", "E", "F", "G", "H","I","J", "K", "L", "M", "N", "O", "P", "Q","R","S", "T", "U", "V", "W", "X", "Y", "Z"];
for (var i = 0; i < arr.length; i++)
{
        if (arr[i] == str.charAt(0))
        {
            return true;
        }
}   
return false;
    }


function check_word(str)
{   var arr = ["a", "b", "c", "d", "e", "f", "g", "h","i","j", "k", "l", "m", "n", "o", "p", "q","r", "s", "t", "u", "v", "w", "x", "y","z","A", "B", "C", "D", "E", "F", "G", "H","I","J", "K", "L", "M", "N", "O", "P", "Q","R","S", "T", "U", "V", "W", "X", "Y", "Z"];
for (var i = 0; i < arr.length; i++)
{
    for (var j = 0; j < str.length; j++)
    {
        if (arr[i] == str.charAt(j))
        {
            return true;
        }
    }
}   
return false;
    }

// 验证用户名是否含有特殊字符
function check_other_char(str)
{
    var arr = ["&", "\\", "/", "*", ">", "<", "@", "!"];
    for (var i = 0; i < arr.length; i++)
    {
        for (var j = 0; j < str.length; j++)
        {
            if (arr[i] == str.charAt(j))
            {
                return true;
            }
        }
    }   
    return false;
}*/
// 根据验证结果确认是否提交
function check_submit()
{
    if (flag == false)
    {
        return false;
    }
    return true;
}
</script>
</head>
</body>
<script>
 var show_num = [];
 draw(show_num);
function dj(){
 draw(show_num);   
 }
function sublim(){
var val=document.getElementById("text").value;  
            var num = show_num.join("");
            if(val==''){
                alert('请输入验证码！');
            }else if(val == num){
                alert('提交成功！');
                document.getElementById(".input-val").val('');
                draw(show_num);

            }else{
                alert('验证码错误！\n你输入的是:  '+val+"\n正确的是:  "+num+'\n请重新输入！');
                document.getElementById("text").value='';
                draw(show_num);
            }
        
       
        
          }
function draw(show_num) {
        var canvas_width=document.getElementById('canvas').clientWidth;
        var canvas_height=document.getElementById('canvas').clientHeight;
        var canvas = document.getElementById("canvas");//获取到canvas的对象，演员
        var context = canvas.getContext("2d");//获取到canvas画图的环境，演员表演的舞台
        canvas.width = canvas_width;
        canvas.height = canvas_height;
        var sCode = "1,2,3,4,5,6,7,8,9,0,q,w,e,r,t,y,u,i,o,p,a,s,d,f,g,h,j,k,l,z,x,c,v,b,n,m";
        var aCode = sCode.split(",");
        var aLength = aCode.length;//获取到数组的长度
            
        for (var i = 0; i <= 3; i++) {
            var j = Math.floor(Math.random() * aLength);//获取到随机的索引值
            var deg = Math.random() * 30 * Math.PI / 180;//产生0~30
            var txt = aCode[j];//得到随机的一个内容
            show_num[i] = txt;
            var x = 10 + i * 20;//文字在canvas上的x坐标
            var y = 20 + Math.random() * 8;//文字在canvas上的y坐标
            context.font = "bold 23px 微软雅黑";

            context.translate(x, y);
            context.rotate(deg);

            context.fillStyle = randomColor();
            context.fillText(txt, 0, 0);

            context.rotate(-deg);
            context.translate(-x, -y);
        }
        for (var i = 0; i <= 5; i++) { //验证码上显示线条
            context.strokeStyle = randomColor();
            context.beginPath();
            context.moveTo(Math.random() * canvas_width, Math.random() * canvas_height);
            context.lineTo(Math.random() * canvas_width, Math.random() * canvas_height);
            context.stroke();
        }
        for (var i = 0; i <= 30; i++) { //验证码上显示小点
            context.strokeStyle = randomColor();
            context.beginPath();
            var x = Math.random() * canvas_width;
            var y = Math.random() * canvas_height;
            context.moveTo(x, y);
            context.lineTo(x + 1, y + 1);
            context.stroke();
        }
    }
function randomColor() {//得到随机的颜色值
        var r = Math.floor(Math.random() * 256);
        var g = Math.floor(Math.random() * 256);
        var b = Math.floor(Math.random() * 256);
        return "rgb(" + r + "," + g + "," + b + ")";
    }
</script>
</html>

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%@taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>

</head>
<body>
    <%
         Object message = request.getAttribute("message");
         if(message!=null && !"".equals(message)){
     
    %>
         <script type="text/javascript">
              alert("<%=request.getAttribute("message")%>");
         </script>
    <%} %>
    <div align="center">
        <h1 style="color: black;">公文信息列表</h1>
        <a href="chenggong.jsp">返回主页</a>
        <table class="tb">
            <tr>
                <td>id</td>
                <td>公文类别</td>
                <td>公文标题</td>
                <td>公文信息</td>
                
                
                
                <td align="center" colspan="2">操作</td>
            </tr>
            <c:forEach items="${courses}" var="item">
                <tr>
                    <td>${item.id}</td>
                    <td>${item.leibie}</td>
                    <td>${item.biaoti}</td>
                    <td>${item.main}</td>
                    
                    <td><a href="CourseServlet?method=getcoursebyid&id=${item.id}">修改</a></td>
                </tr>
            </c:forEach>
        </table>
    </div>
</body>
</html>

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>

</head>
<body>
    <div align="center">
        <h1 style="color: black;">公文信息查询</h1>
        <a href="chenggong.jsp">返回主页</a>
        <form action="CourseServlet?method=search" method="post" onsubmit="return check()">
            <div class="a">
                公文类别<input type="text" id="leibie" name="leibie"/>
            </div>
            <div class="a">
                公文标题<input type="text" id="biaoti" name="biaoti" />
            </div>
            <div class="a">
                公文内容<input type="text" id="main" name="main" />
            </div>
            
            <div class="a">
                <button type="submit" class="b">查&nbsp;&nbsp;&nbsp;询</button>
            </div>
        </form>
    </div>
    <script type="text/javascript">
        function check() {
            var leibie = document.getElementById("leibie");;
            var main = document.getElementById("main");
            var biaoti = document.getElementById("biaoti");
            
            
            //非空
            
            }
        }
    </script>
</body>
</html>

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%@taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>

</head>
<body>
    <div align="center">
        <h1 style="color: black;">信息列表</h1>
        <a href="chenggong.jsp">返回主页</a>
        <table class="tb">
            <tr>
                <td>id</td>
                <td>公文类别</td>
                <td>公文标题</td>
                <td>公文信息</td>
            </tr>
            <!-- forEach遍历出adminBeans -->
            <c:forEach items="${courses}" var="item" varStatus="status">
                <tr>
                    <td>${item.id}</td>
                    <td>${item.leibie}</td>
                    <td>${item.biaoti}</td>
                    <td>${item.main}</td>
                </tr>
            </c:forEach>
        </table>
    </div>
</body>
</html>

以上实现了，登陆跳转和公文的增删改查。