公文流转系统

1.

（1）首页(登录页)：用户登录页(共有十位用户帐号，帐号、密码可预设)。不同用户登录后，进入的功能页不相同。

（2） 部门(不含办公室)功能页：有公文拟制、签收公文、浏览公文(已签收的公文)三个模块

（3） 办公室功能页：有修改公文、公文流转、删除公文、公文发送等功能。

（4） 副厂长功能页：有审核公文(修改并签意见)、浏览已发所有公文、查询公文三个模块。

（5） 厂长功能页：有审签公文(修改并签意见)、浏览已发所有公文、查询公文三个模块。

（6） 系统管理功能页：有用户管理、角色管理、公文流转流程管理。

2.角色配置管理

（1）用户权限维护功能：实现对用户的角色管理。

（2）角色维护功能：

a）实现对角色权限的管理，主要有编辑、增加和删除操作。

b) 用户管理：查看用户、新开用户、暂停用户、用户信息修改、删除用户

c) 单位管理员设置功能：每个单位的操作员实现修改密码、修改个人信息。

 

 数据库连接：

package com.official.util;

import java.sql.Connection;

import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;

import com.official.bean.Doc;
import com.official.bean.Permission;
import com.official.bean.Users;


public class DBUtil {
    //数据库URL和账号密码
    private static final String connectionURL="jdbc:mysql://localhost:3306/doc_system?useSSL=false&useUnicode=true&characterEncoding=UTF-8";
    private static final String username="root";
    private static final String password="root";
    
    //数据库连接
    public static Connection getConnection()
    {
        try {
            Class.forName("com.mysql.cj.jdbc.Driver");
            return DriverManager.getConnection(connectionURL,username,password);
        } catch (Exception e) {
            // TODO: handle exception
            System.out.println("数据库连接失败");
            e.printStackTrace();
            return null;
        }
    }
    public static void closeAll(Connection connection,PreparedStatement statement,ResultSet rSet)
    {
        try {
            if(connection!=null)
                connection.close();
        } catch (SQLException e) {
            // TODO 自动生成的 catch 块
            e.printStackTrace();
        }
    
        try {
            if(statement!=null)
                statement.close();
        } catch (SQLException e) {
            // TODO 自动生成的 catch 块
            e.printStackTrace();
        }
    
        try {
            if(rSet!=null)
                rSet.close();
        } catch (SQLException e) {
            // TODO 自动生成的 catch 块
            e.printStackTrace();
        }
    }
        
    //关闭connection和preparedstatement
    public static void closePart(Connection connection,PreparedStatement statement)
    {
        try {
            if(connection!=null)
                connection.close();
        } catch (SQLException e) {
            // TODO 自动生成的 catch 块
            e.printStackTrace();
        }
    
        try {
            if(statement!=null)
                statement.close();
        } catch (SQLException e) {
            // TODO 自动生成的 catch 块
            e.printStackTrace();
        }
    }
        
    //某表的增删改查
    public static ArrayList<Doc> getDoces(String type)
    {
        Connection connection=null;
        PreparedStatement preparedStatement=null;
        ResultSet rSet=null;
        try {
            connection=getConnection();
            String sql;
            System.out.println(type);
            if(type.equals("receive"))
            {
                sql="select * from doc_list where status=0 or status=2 or status=3 or status=6 or status=7 or status=-1 and deletestatus=0";
            }
            else if(type.equals("send"))
            {
                sql="select * from doc_list where status=1 or status=4 or status=5 or status=8 or status=9 or status=10 and deletestatus=0";
            }
            else if(type.equals("delete"))
            {
                sql="select * from doc_list where deletestatus=1";
            }
            else {
                sql="select * from doc_list";
            }
            preparedStatement=connection.prepareStatement(sql);
            rSet=preparedStatement.executeQuery();
            ArrayList<Doc> list=new ArrayList<>();
            while(rSet.next())
            {
                Doc doc=new Doc();
                doc.setId(rSet.getInt("id"));
                doc.setTitle(rSet.getString("title"));
                doc.setOwner(rSet.getString("owner"));
                doc.setTime(rSet.getString("time"));
                doc.setReceiver(rSet.getString("receiver"));
                doc.setStatus(rSet.getInt("status"));
                doc.setResult(rSet.getInt("result"));
                doc.setPlace(rSet.getString("place"));
                doc.setDeletestatus(rSet.getInt("deletestatus"));
                list.add(doc);
            }
            return list;
        } catch (SQLException e) {
            // TODO: handle exception
            e.printStackTrace();
        }
        finally {
            closeAll(connection, preparedStatement, rSet);
        }
        return null;
    }
    
    //登录时验证数据库中账户是否存在
    public static boolean log_isExist(Users user)
    {
        Connection con=null;
        PreparedStatement pstmt=null;
        ResultSet rs=null;
        try {
            con=getConnection();
            String sql_query="select * from users where username = '"+user.getUsername()+"' and password = '"+user.getPassword()+"' and status != 0";
            System.out.println(sql_query);
            pstmt=con.prepareStatement(sql_query);
            rs=pstmt.executeQuery();
            if(rs.next()==false)
            {
                System.out.println("用户名或密码错误");
                return false;
            }
            else
            {
                System.out.println("用户名及密码正确");
                return true;
            }
        }
        catch (SQLException e) {
            System.out.println("未连接");
            e.printStackTrace();
        }
        finally {
            closeAll(con, pstmt, rs);
        }
        return false;
    }
    
    //增加公文
    public static boolean add_doc(Doc doc)
    {
        Connection con=null;
        PreparedStatement pstmt=null;
        ResultSet rs=null;
        try {
            con=getConnection();
            String sql="insert into doc_list(title,owner,receiver,time,status,result,place,deletestatus,callback) values(?,?,?,?,?,?,?,?,?)";
            pstmt=con.prepareStatement(sql);
            pstmt.setString(1, doc.getTitle());
            pstmt.setString(2, doc.getOwner());
            pstmt.setString(3, doc.getReceiver());
            pstmt.setString(4, doc.getTime());
            pstmt.setInt(5, doc.getStatus());
            pstmt.setInt(6, doc.getResult());
            pstmt.setString(7, doc.getPlace());
            pstmt.setInt(8, 0);
            pstmt.setInt(9, 0);
            pstmt.executeUpdate();
            return true;
        }
        catch (SQLException e) {
            System.out.println("注册失败");
            e.printStackTrace();
        }
        finally {
            closeAll(con, pstmt, rs);
        }
        return false;
    }
    
    
    //删除数据
    public static boolean delete_user(Users user)
    {
        Connection con=null;
        PreparedStatement pstmt=null;
        try {
            con=getConnection();
            String sql="delete from users where id="+user.getId();
            System.out.println(sql);
            pstmt=con.prepareStatement(sql);
            pstmt.executeUpdate();
            return true;
        }
        catch(SQLException e)
        {
            e.printStackTrace();
        }
        finally {
            closePart(con, pstmt);
        }
        return false;
    }
    
    public static boolean update_userstatus(Users user)
    {
        Connection con=null;
        PreparedStatement pstmt=null;
        try {
            con=getConnection();
            String sql="update users set status = ? where id = ?";
            pstmt=con.prepareStatement(sql);
            pstmt.setInt(1, user.getStatus());
            pstmt.setInt(2, user.getId());
            pstmt.executeUpdate();
            return true;
        }
        catch(SQLException e)
        {
            e.printStackTrace();
        }
        finally {
            closePart(con, pstmt);
        }
        return false;
    }
    
    public static boolean update_user(Users user)
    {
        Connection con=null;
        PreparedStatement pstmt=null;
        try {
            con=getConnection();
            String sql="update users set username=?,password=?,job=? where id = "+user.getId();
            pstmt=con.prepareStatement(sql);
            pstmt.setString(1, user.getUsername());
            pstmt.setString(2, user.getPassword());
            pstmt.setString(3, user.getJob());
            pstmt.executeUpdate();
            return true;
        }
        catch(SQLException e)
        {
            e.printStackTrace();
        }
        finally {
            closePart(con, pstmt);
        }
        return false;
    }
    
    @SuppressWarnings("resource")
    public static boolean sendDoc(int id)
    {
        Connection con=null;
        PreparedStatement pstmt=null;
        ResultSet rSet=null;
        int status=-1;
        int newstatus=-1;
        String receiver="";
        try {
            con=DBUtil.getConnection();
            String sql_query="select * from doc_list where id="+id;
            pstmt=con.prepareStatement(sql_query);
            rSet=pstmt.executeQuery();
            if(rSet.next())
            {
                status=rSet.getInt("status");
            }
            switch (status) {
            case 0:
                newstatus=1;
                receiver="副厂长";
                break;
            case 2:
                newstatus=5;
                receiver="厂长";
                break;
            case 3:
                newstatus=4;
                receiver="部门";
                break;
            case 6:
                newstatus=8;
                receiver="部门和副厂长";
                break;
            case 7:
                newstatus=9;
                receiver="部门和副厂长";
                break;
            case 8:
                newstatus=10;
                receiver="部门";
                break;
            default:
                System.out.println("公文状态有误！");
                break;
            }
            String sql_update="update doc_list set status = ? where id = ?";
            pstmt=con.prepareStatement(sql_update);
            pstmt.setInt(1, newstatus);
            pstmt.setInt(2, id);
            pstmt.executeUpdate();
            return true;
        }
        catch (SQLException e) {
            System.out.println("数据库信息更新失败");
            e.printStackTrace();
        }
        finally {
            closePart(con, pstmt);
        }
        return false;
    }
    
    public static ArrayList<Doc> getDocesByCase(String type,String value)
    {
        Connection connection=null;
        PreparedStatement preparedStatement=null;
        ResultSet rSet=null;
        try {
            connection=getConnection();
            String sql="";
            System.out.println(type);
            if(type.equals("title"))
            {
                sql="select * from doc_list where title='"+value+"'";
            }
            else if(type.equals("owner"))
            {
                sql="select * from doc_list where owner='"+value+"'";
            }
            else if(type.equals("receiver"))
            {
                sql="select * from doc_list where receiver='"+value+"'";
            }
            else if(type.equals("result"))
            {
                sql="select * from doc_list where result='"+value+"'";
            }
            preparedStatement=connection.prepareStatement(sql);
            rSet=preparedStatement.executeQuery();
            ArrayList<Doc> list=new ArrayList<>();
            while(rSet.next())
            {
                Doc doc=new Doc();
                doc.setId(rSet.getInt("id"));
                doc.setTitle(rSet.getString("title"));
                doc.setOwner(rSet.getString("owner"));
                doc.setTime(rSet.getString("time"));
                doc.setReceiver(rSet.getString("receiver"));
                doc.setStatus(rSet.getInt("status"));
                doc.setResult(rSet.getInt("result"));
                doc.setPlace(rSet.getString("place"));
                list.add(doc);
            }
            return list;
        } catch (SQLException e) {
            // TODO: handle exception
            e.printStackTrace();
        }
        finally {
            closeAll(connection, preparedStatement, rSet);
        }
        return null;
    }
    
    public static ArrayList<Doc> getCheckedorNot(String type)
    {
        Connection connection=null;
        PreparedStatement preparedStatement=null;
        ResultSet rSet=null;
        try {
            connection=getConnection();
            String sql="";
            System.out.println(type);
            if(type.equals("notchecked"))
            {
                sql="select * from doc_list where status=1";
            }
            else
            {
                sql="select * from doc_list where status!=1 and status!=0 and status!=-1";
            }
            preparedStatement=connection.prepareStatement(sql);
            rSet=preparedStatement.executeQuery();
            ArrayList<Doc> list=new ArrayList<>();
            while(rSet.next())
            {
                Doc doc=new Doc();
                doc.setId(rSet.getInt("id"));
                doc.setTitle(rSet.getString("title"));
                doc.setOwner(rSet.getString("owner"));
                doc.setTime(rSet.getString("time"));
                doc.setReceiver(rSet.getString("receiver"));
                doc.setStatus(rSet.getInt("status"));
                doc.setResult(rSet.getInt("result"));
                doc.setPlace(rSet.getString("place"));
                list.add(doc);
            }
            return list;
        } catch (SQLException e) {
            // TODO: handle exception
            e.printStackTrace();
        }
        finally {
            closeAll(connection, preparedStatement, rSet);
        }
        return null;
    }
    
    public static ArrayList<Doc> getFcheckedorNot(String type)
    {
        Connection connection=null;
        PreparedStatement preparedStatement=null;
        ResultSet rSet=null;
        try {
            connection=getConnection();
            String sql="";
            if(type.equals("checked"))
            {
                sql="select * from doc_list where status=6 or status=7";
            }
            else
            {
                sql="select * from doc_list where status=5";
            }
            preparedStatement=connection.prepareStatement(sql);
            rSet=preparedStatement.executeQuery();
            ArrayList<Doc> list=new ArrayList<>();
            while(rSet.next())
            {
                Doc doc=new Doc();
                doc.setId(rSet.getInt("id"));
                doc.setTitle(rSet.getString("title"));
                doc.setOwner(rSet.getString("owner"));
                doc.setTime(rSet.getString("time"));
                doc.setReceiver(rSet.getString("receiver"));
                doc.setStatus(rSet.getInt("status"));
                doc.setResult(rSet.getInt("result"));
                doc.setPlace(rSet.getString("place"));
                list.add(doc);
            }
            return list;
        } catch (SQLException e) {
            // TODO: handle exception
            e.printStackTrace();
        }
        finally {
            closeAll(connection, preparedStatement, rSet);
        }
        return null;
    }
    
    
    public static ArrayList<Doc> getReceivedByUser(String type,Users user)
    {
        Connection connection=null;
        PreparedStatement preparedStatement=null;
        ResultSet rSet=null;
        try {
            connection=getConnection();
            String sql="";
            if(type.equals("received"))
            {
                sql="select * from doc_list where owner=? and status=10";
            }
            else
            {
                sql="select * from doc_list where owner=? and status!=10";
            }
            preparedStatement=connection.prepareStatement(sql);
            preparedStatement.setString(1, user.getUsername());
            rSet=preparedStatement.executeQuery();
            ArrayList<Doc> list=new ArrayList<>();
            while(rSet.next())
            {
                Doc doc=new Doc();
                doc.setId(rSet.getInt("id"));
                doc.setTitle(rSet.getString("title"));
                doc.setTime(rSet.getString("time"));
                doc.setStatus(rSet.getInt("status"));
                doc.setResult(rSet.getInt("result"));
                list.add(doc);
            }
            return list;
        } catch (SQLException e) {
            // TODO: handle exception
            e.printStackTrace();
        }
        finally {
            closeAll(connection, preparedStatement, rSet);
        }
        return null;
    }
    
    public static Doc getDocById(Doc doc)
    {
        Connection connection=null;
        PreparedStatement preparedStatement=null;
        ResultSet rSet=null;
        try {
            connection=getConnection();
            String sql="select * from doc_list where id="+doc.getId();
            preparedStatement=connection.prepareStatement(sql);
            rSet=preparedStatement.executeQuery();
            if(rSet.next())
            {
                doc.setTitle(rSet.getString("title"));
                doc.setOwner(rSet.getString("owner"));
                doc.setTime(rSet.getString("time"));
                doc.setReceiver(rSet.getString("receiver"));
                doc.setStatus(rSet.getInt("status"));
                doc.setResult(rSet.getInt("result"));
                doc.setPlace(rSet.getString("place"));
                doc.setTipplace(rSet.getString("tipplace"));
                doc.setFtipplace(rSet.getString("tipfplace"));
                return doc;
            }
        } catch (SQLException e) {
            // TODO: handle exception
            e.printStackTrace();
        }
        finally {
            closeAll(connection, preparedStatement, rSet);
        }
        return null;
    }
    
    public static boolean checked_change(Doc doc)
    {
        Connection connection=null;
        PreparedStatement preparedStatement=null;
        String sql_update="update doc_list set status = ?,result = ?,receiver = ?,tipplace = ? where id = ?";
        try {
            connection=getConnection();
            preparedStatement=connection.prepareStatement(sql_update);
            preparedStatement.setInt(1, doc.getStatus());
            preparedStatement.setInt(2, doc.getResult());
            preparedStatement.setString(3, doc.getReceiver());
            preparedStatement.setString(4, doc.getTipplace());
            preparedStatement.setInt(5, doc.getId());
            preparedStatement.executeUpdate();
            return true;
        } catch (SQLException e) {
            // TODO 自动生成的 catch 块
            e.printStackTrace();
        }
        finally {
            closePart(connection, preparedStatement);
        }
        return false;
    }
    
    public static boolean fchecked_change(Doc doc)
    {
        Connection connection=null;
        PreparedStatement preparedStatement=null;
        String sql_update="update doc_list set status = ?,result = ?,receiver = ?,tipfplace = ? where id = ?";
        try {
            connection=getConnection();
            preparedStatement=connection.prepareStatement(sql_update);
            preparedStatement.setInt(1, doc.getStatus());
            preparedStatement.setInt(2, doc.getResult());
            preparedStatement.setString(3, doc.getReceiver());
            preparedStatement.setString(4, doc.getFtipplace());
            preparedStatement.setInt(5, doc.getId());
            preparedStatement.executeUpdate();
            return true;
        } catch (SQLException e) {
            // TODO 自动生成的 catch 块
            e.printStackTrace();
        }
        finally {
            closePart(connection, preparedStatement);
        }
        return false;
    }
    
    public static boolean formatDoc(Doc doc)
    {
        Connection connection=null;
        PreparedStatement preparedStatement=null;
        String sql_update="update doc_list set status = ? where id = ?";
        try {
            connection=getConnection();
            preparedStatement=connection.prepareStatement(sql_update);
            preparedStatement.setInt(1, doc.getStatus());
            preparedStatement.setInt(2, doc.getId());
            preparedStatement.executeUpdate();
            return true;
        } catch (SQLException e) {
            // TODO 自动生成的 catch 块
            e.printStackTrace();
        }
        finally {
            closePart(connection, preparedStatement);
        }
        return false;
    }
    
    public static boolean ReceiveDoc(Doc doc)
    {
        Connection connection=null;
        PreparedStatement preparedStatement=null;
        String sql_update="update doc_list set status = ?,callback = 1 where id = ?";
        try {
            connection=getConnection();
            preparedStatement=connection.prepareStatement(sql_update);
            preparedStatement.setInt(1, 10);
            preparedStatement.setInt(2, doc.getId());
            preparedStatement.executeUpdate();
            return true;
        } catch (SQLException e) {
            // TODO 自动生成的 catch 块
            e.printStackTrace();
        }
        finally {
            closePart(connection, preparedStatement);
        }
        return false;
    }
    
    public static ArrayList<Doc> getDocByTime(Doc doc1,Doc doc2)
    {
        Connection connection=null;
        PreparedStatement preparedStatement=null;
        ResultSet rs=null;
        String sql="select * from doc_list where time between ? and ?";
        try {
            connection=getConnection();
            preparedStatement=connection.prepareStatement(sql);
            preparedStatement.setString(1,doc1.getTime());
            preparedStatement.setString(2, doc2.getTime());
            rs=preparedStatement.executeQuery();
            ArrayList<Doc> list=new ArrayList<>();
            while(rs.next())
            {
                Doc doc=new Doc();
                doc.setId(rs.getInt("id"));
                doc.setTitle(rs.getString("title"));
                doc.setTime(rs.getString("time"));
                doc.setOwner(rs.getString("owner"));
                list.add(doc);
            }
            return list;
        } catch (SQLException e) {
            // TODO 自动生成的 catch 块
            e.printStackTrace();
        }
        finally {
            closePart(connection, preparedStatement);
        }
        return null;
    }
    
    public static ArrayList<Doc> getAllDoc()
    {
        Connection connection=null;
        PreparedStatement preparedStatement=null;
        ResultSet rs=null;
        String sql="select * from doc_list";
        try {
            connection=getConnection();
            preparedStatement=connection.prepareStatement(sql);
            rs=preparedStatement.executeQuery();
            ArrayList<Doc> list=new ArrayList<>();
            while(rs.next())
            {
                Doc doc=new Doc();
                doc.setId(rs.getInt("id"));
                doc.setTitle(rs.getString("title"));
                doc.setTime(rs.getString("time"));
                doc.setOwner(rs.getString("owner"));
                list.add(doc);
            }
            return list;
        } catch (SQLException e) {
            // TODO 自动生成的 catch 块
            e.printStackTrace();
        }
        finally {
            closePart(connection, preparedStatement);
        }
        return null;
    }
    
    public static ArrayList<Users> getAllUser()
    {
        Connection connection=null;
        PreparedStatement preparedStatement=null;
        ResultSet rs=null;
        String sql="select * from users";
        try {
            connection=getConnection();
            preparedStatement=connection.prepareStatement(sql);
            rs=preparedStatement.executeQuery();
            ArrayList<Users> list=new ArrayList<>();
            while(rs.next())
            {
                Users user=new Users();
                user.setId(rs.getInt("id"));
                user.setUsername(rs.getString("username"));
                user.setPassword(rs.getString("password"));
                user.setPermissionId(rs.getInt("permissionId"));
                user.setJob(rs.getString("job"));
                user.setStatus(rs.getInt("status"));
                list.add(user);
            }
            return list;
        } catch (SQLException e) {
            // TODO 自动生成的 catch 块
            e.printStackTrace();
        }
        finally {
            closePart(connection, preparedStatement);
        }
        return null;
    }
    
    public static Users getUserById(Users user)
    {
        Connection connection=null;
        PreparedStatement preparedStatement=null;
        ResultSet rs=null;
        String sql="select * from users where id="+user.getId();
        try {
            connection=getConnection();
            preparedStatement=connection.prepareStatement(sql);
            rs=preparedStatement.executeQuery();
            Users user1=new Users();
            if(rs.next())
            {
                user1.setId(rs.getInt("id"));
                user1.setUsername(rs.getString("username"));
                user1.setPassword(rs.getString("password"));
                user1.setPermissionId(rs.getInt("permissionId"));
                user1.setStatus(rs.getInt("status"));
                user1.setJob(rs.getString("job"));
            }
            return user1;
        } catch (SQLException e) {
            // TODO 自动生成的 catch 块
            e.printStackTrace();
        }
        finally {
            closePart(connection, preparedStatement);
        }
        return null;
    }
    
    public static ArrayList<Permission> getPermission(Permission permission)
    {
        Connection connection=null;
        PreparedStatement preparedStatement=null;
        ResultSet rs=null;
        String sql="select * from permission where id="+permission.getId();
        try {
            connection=getConnection();
            preparedStatement=connection.prepareStatement(sql);
            rs=preparedStatement.executeQuery();
            ArrayList<Permission> list=new ArrayList<>();
            while(rs.next())
            {
                Permission permission1=new Permission();
                permission1.setId(rs.getInt("id"));
                permission1.setPermission(rs.getInt("permission"));
                list.add(permission1);
            }
            return list;
        } catch (SQLException e) {
            // TODO 自动生成的 catch 块
            e.printStackTrace();
        }
        finally {
            closePart(connection, preparedStatement);
        }
        return null;
    }
    
    public static boolean deletePermission(Permission permission)
    {
        Connection con=null;
        PreparedStatement pstmt=null;
        try {
            con=getConnection();
            String sql="delete from permission where id="+permission.getId();
            System.out.println(sql);
            pstmt=con.prepareStatement(sql);
            pstmt.executeUpdate();
            return true;
        }
        catch(SQLException e)
        {
            e.printStackTrace();
        }
        finally {
            closePart(con, pstmt);
        }
        return false;
    }
    
    public static boolean updatePermission(Permission permission1,Permission permission2)
    {
        Connection con=null;
        PreparedStatement pstmt=null;
        try {
            con=getConnection();
            String sql="update permission set permission = ? where id = ? and permission = ?";
            pstmt=con.prepareStatement(sql);
            pstmt.setInt(1, permission2.getPermission());
            pstmt.setInt(2, permission1.getId());
            pstmt.setInt(3, permission1.getPermission());
            pstmt.executeUpdate();
            return true;
        }
        catch(SQLException e)
        {
            e.printStackTrace();
        }
        finally {
            closePart(con, pstmt);
        }
        return false;
    }
    
    public static boolean updatePwd(Users user)
    {
        Connection con=null;
        PreparedStatement pstmt=null;
        try {
            con=getConnection();
            String sql="update users set password = ? where username = ?";
            pstmt=con.prepareStatement(sql);
            pstmt.setString(1, user.getPassword());
            pstmt.setString(2, user.getUsername());
            pstmt.executeUpdate();
            return true;
        }
        catch(SQLException e)
        {
            e.printStackTrace();
        }
        finally {
            closePart(con, pstmt);
        }
        return false;
    }
    
    public static Users getUserByUsername(Users user)
    {
        Connection connection=null;
        PreparedStatement preparedStatement=null;
        ResultSet rs=null;
        String sql="select * from users where username='"+user.getUsername()+"'";
        try {
            connection=getConnection();
            preparedStatement=connection.prepareStatement(sql);
            rs=preparedStatement.executeQuery();
            Users user1=new Users();
            if(rs.next())
            {
                user1.setId(rs.getInt("id"));
                user1.setPermissionId(rs.getInt("permissionId"));
                System.out.println(user1.getPermissionId());
            }
            return user1;
        } catch (SQLException e) {
            // TODO 自动生成的 catch 块
            e.printStackTrace();
        }
        finally {
            closePart(connection, preparedStatement);
        }
        return null;
    }
    
    public static boolean deleteDoc(Doc doc)
    {
        Connection con=null;
        PreparedStatement pstmt=null;
        try {
            con=getConnection();
            String sql="update doc_list set deletestatus = ? where id = ?";
            pstmt=con.prepareStatement(sql);
            pstmt.setInt(1, doc.getDeletestatus());
            pstmt.setInt(2, doc.getId());
            pstmt.executeUpdate();
            return true;
        }
        catch(SQLException e)
        {
            e.printStackTrace();
        }
        finally {
            closePart(con, pstmt);
        }
        return false;
    }
    
    public static ArrayList<Doc> getCall()
    {
        Connection connection=null;
        PreparedStatement preparedStatement=null;
        ResultSet rSet=null;
        try {
            connection=getConnection();
            String sql="select * from doc_list where callback=1";
            preparedStatement=connection.prepareStatement(sql);
            rSet=preparedStatement.executeQuery();
            ArrayList<Doc> list=new ArrayList<>();
            while(rSet.next())
            {
                Doc doc=new Doc();
                doc.setId(rSet.getInt("id"));
                doc.setTitle(rSet.getString("title"));
                doc.setOwner(rSet.getString("owner"));
                doc.setTime(rSet.getString("time"));
                doc.setReceiver(rSet.getString("receiver"));
                doc.setStatus(rSet.getInt("status"));
                doc.setResult(rSet.getInt("result"));
                doc.setPlace(rSet.getString("place"));
                doc.setDeletestatus(rSet.getInt("deletestatus"));
                doc.setCallback(rSet.getInt("callback"));
                list.add(doc);
            }
            return list;
        } catch (SQLException e) {
            // TODO: handle exception
            e.printStackTrace();
        }
        finally {
            closeAll(connection, preparedStatement, rSet);
        }
        return null;
    }
    
    public static boolean setCallOver(Doc doc)
    {
        Connection con=null;
        PreparedStatement pstmt=null;
        try {
            con=getConnection();
            String sql="update doc_list set callback = ? where id = ?";
            pstmt=con.prepareStatement(sql);
            pstmt.setInt(1, 0);
            pstmt.setInt(2, doc.getId());
            pstmt.executeUpdate();
            return true;
        }
        catch(SQLException e)
        {
            e.printStackTrace();
        }
        finally {
            closePart(con, pstmt);
        }
        return false;
    }

    public static void main(String[] args) {
        //getConnection();
        
    }
}