学生信息管理系统--（Java+MySQL实现）

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学生信息管理系统--（Java+MySQL实现）

标签： Javamysqljdbcswing信息系统

2016-01-07 15:02  175人阅读  评论(7)  收藏  举报

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java（15） 

版权声明：本文为博主原创文章，未经博主允许不得转载。

基于Java swing+MySQL实现学生信息管理系统：主要实现JDBC对学生信息进行增删改查，应付一般课设足矣，分享给大家。（由于篇幅原因，代码未全部列出，如有需要留下邮箱）

1、 开发环境：jdk7+MySQL5+win7

代码结构：model-dao-view

2、 数据库设计--建库建表语句：

 CREATE DATABASE student;

 DROP TABLE IF EXISTS `admin`;
 CREATE TABLE `admin` (
   `id` int(11) NOT NULL AUTO_INCREMENT,
   `name` varchar(20) NOT NULL,
   `username` varchar(20) NOT NULL,
   `password` varchar(20) NOT NULL,
   PRIMARY KEY (`id`)
 ) ENGINE=InnoDB AUTO_INCREMENT=2 DEFAULT CHARSET=utf8;

 LOCK TABLES `admin` WRITE;
 INSERT INTO `admin` VALUES (1,'admin','admin','admin');
 UNLOCK TABLES;

 DROP TABLE IF EXISTS `student`;
 CREATE TABLE `student` (
   `id` int(11) NOT NULL AUTO_INCREMENT,
   `name` varchar(20) NOT NULL,
   `sno` varchar(20) NOT NULL,
   `department` varchar(20) NOT NULL,
   `hometown` varchar(20) NOT NULL,
   `mark` varchar(20) NOT NULL,
   `email` varchar(20) NOT NULL,
   `tel` varchar(20) NOT NULL,
   `sex` varchar(20) NOT NULL,
   PRIMARY KEY (`id`)
 ) ENGINE=InnoDB AUTO_INCREMENT=22 DEFAULT CHARSET=utf8;

 LOCK TABLES `student` WRITE;
 INSERT INTO `student` VALUES (18,'张三','001','信息科学技术学院','辽宁','80','[email protected]','13888888888','男'),(19,'李四','002','理学院','上海','70','[email protected]','13812341234','男'),(20,'王五','003','外国语学院','北京','88','[email protected]','13698765432','女');
 UNLOCK TABLES;

3、model--管理员、学生

 /**
  * 项目名：student
  * 修改历史：
  * 作者： MZ
  * 创建时间： 2016年1月6日-上午9:42:48
  */
 package com.student.model;

 /**
  * 模块说明：admin
  *
  */
 public class Admin {
     private int id;
     private String name;
     private String username;
     private String password;

     public String getName() {
         return name;
     }

     public void setName(String name) {
         this.name = name;
     }

     public int getId() {
         return id;
     }

     public void setId(int id) {
         this.id = id;
     }

     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;
     }

 }

 /**
  * 项目名：student
  * 修改历史：
  * 作者： MZ
  * 创建时间： 2016年1月6日-上午9:42:36
  */
 package com.student.model;

 /**
  * 模块说明： 学生
  *
  */
 public class Student {
     private int id;
     private String sno;// 学号
     private String name;
     private String sex;
     private String department;// 院系
     private String homeTown;// 籍贯
     private String mark;// 学分
     private String email;
     private String tel;// 联系方式

     public int getId() {
         return id;
     }

     public void setId(int id) {
         this.id = id;
     }

     public String getSno() {
         return sno;
     }

     public void setSno(String sno) {
         this.sno = sno;
     }

     public String getName() {
         return name;
     }

     public void setName(String name) {
         this.name = name;
     }

     public String getSex() {
         return sex;
     }

     public void setSex(String sex) {
         this.sex = sex;
     }

     public String getDepartment() {
         return department;
     }

     public void setDepartment(String department) {
         this.department = department;
     }

     public String getHomeTown() {
         return homeTown;
     }

     public void setHomeTown(String homeTown) {
         this.homeTown = homeTown;
     }

     public String getMark() {
         return mark;
     }

     public void setMark(String mark) {
         this.mark = mark;
     }

     public String getEmail() {
         return email;
     }

     public void setEmail(String email) {
         this.email = email;
     }

     public String getTel() {
         return tel;
     }

     public void setTel(String tel) {
         this.tel = tel;
     }

 }

4、 工具类DBUtil（对jdbc进行封装）

 /**
  * 项目名：student
  * 修改历史：
  * 作者： MZ
  * 创建时间： 2016年1月6日-上午9:43:21
  */
 package com.student.util;

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

 import com.student.AppConstants;

 /**
  * 模块说明：数据库工具类
  *
  */
 public class DBUtil {
     private static DBUtil db;

     private Connection conn;
     private PreparedStatement ps;
     private ResultSet rs;

     private DBUtil() {

     }

     public static DBUtil getDBUtil() {
         if (db == null) {
             db = new DBUtil();
         }
         return db;
     }

     public int executeUpdate(String sql) {
         int result = -1;
         if (getConn() == null) {
             return result;
         }
         try {
             ps = conn.prepareStatement(sql);
             result = ps.executeUpdate();
         } catch (SQLException e) {
             e.printStackTrace();
         }
         return result;
     }

     public int executeUpdate(String sql, Object[] obj) {
         int result = -1;
         if (getConn() == null) {
             return result;
         }
         try {
             ps = conn.prepareStatement(sql);
             for (int i = 0; i < obj.length; i++) {
                 ps.setObject(i + 1, obj[i]);
             }
             result = ps.executeUpdate();
             close();
         } catch (SQLException e) {
             e.printStackTrace();
         }
         return result;
     }

     public ResultSet executeQuery(String sql) {
         if (getConn() == null) {
             return null;
         }
         try {
             ps = conn.prepareStatement(sql);
             rs = ps.executeQuery();
         } catch (SQLException e) {
             e.printStackTrace();
         }
         return rs;
     }

     public ResultSet executeQuery(String sql, Object[] obj) {
         if (getConn() == null) {
             return null;
         }
         try {
             ps = conn.prepareStatement(sql);
             for (int i = 0; i < obj.length; i++) {
                 ps.setObject(i + 1, obj[i]);
             }
             rs = ps.executeQuery();
         } catch (SQLException e) {
             e.printStackTrace();
         }

         return rs;
     }

     private Connection getConn() {
         try {
             if (conn == null || conn.isClosed()) {
                 Class.forName(AppConstants.JDBC_DRIVER);
                 conn = DriverManager.getConnection(AppConstants.JDBC_URL, AppConstants.JDBC_USERNAME,
                         AppConstants.JDBC_PASSWORD);
             }
         } catch (ClassNotFoundException e) {
             System.out.println("jdbc driver is not found.");
             e.printStackTrace();
         } catch (SQLException e) {
             e.printStackTrace();
         }
         return conn;
     }

     public void close() {
         try {
             if (rs != null) {
                 rs.close();
             }
             if (ps != null) {
                 ps.close();
             }
             if (conn != null) {
                 conn.close();
             }
         } catch (SQLException e) {
             e.printStackTrace();
         }
     }
 }

5、 dao：主要调用DBUtil操作相应的model--增删改查

BaseDAO.java

 /**
  * 项目名：student
  * 修改历史：
  * 作者： MZ
  * 创建时间： 2016年1月6日-上午10:04:37
  */
 package com.student.base;

 import java.sql.ResultSet;
 import java.sql.SQLException;

 import com.student.DAO;
 import com.student.dao.AdminDAO;
 import com.student.dao.StudentDAO;
 import com.student.util.DBUtil;

 /**
  * 模块说明： DAO基类
  *
  */
 public abstract class BaseDAO {
     protected final DBUtil db = DBUtil.getDBUtil();
     protected ResultSet rs;
     private static BaseDAO baseDAO;

     public BaseDAO() {
         init();
     }

     private void init() {
         // buildAbilityDAO();
     }

     // protected abstract void buildAbilityDAO();

     public static synchronized BaseDAO getAbilityDAO(DAO dao) {
         switch (dao) {
         case AdminDAO:
             if (baseDAO == null || baseDAO.getClass() != AdminDAO.class) {
                 baseDAO = AdminDAO.getInstance();
             }
             break;
         case StudentDAO:
             if (baseDAO == null || baseDAO.getClass() != StudentDAO.class) {
                 baseDAO = StudentDAO.getInstance();
             }
             break;
         default:
             break;
         }
         return baseDAO;
     }

     protected void destroy() {
         try {
             if (rs != null) {
                 rs.close();
             }
         } catch (SQLException se) {
             se.printStackTrace();
         } finally {
             db.close();
         }
     }
 }

AdminDAO.java

 /**
  * 项目名：student
  * 修改历史：
  * 作者： MZ
  * 创建时间： 2016年1月6日-上午9:59:58
  */
 package com.student.dao;

 import java.sql.SQLException;

 import com.student.base.BaseDAO;

 /**
  * 模块说明： 管理员增删改查
  *
  */
 public class AdminDAO extends BaseDAO {

     private static AdminDAO ad = null;

     public static synchronized AdminDAO getInstance() {
         if (ad == null) {
             ad = new AdminDAO();
         }
         return ad;
     }

     public boolean queryForLogin(String username, String password) {
         boolean result = false;
         if (username.length() == 0 || password.length() == 0) {
             return result;
         }
         String sql = "select * from admin where username=? and password=?";
         String[] param = { username, password };
         rs = db.executeQuery(sql, param);
         try {
             if (rs.next()) {
                 result = true;
             }
         } catch (SQLException e) {
             e.printStackTrace();
         } finally {
             destroy();
         }
         return result;
     }

 }

StudentDAO.java

 /**
  * 项目名：student
  * 修改历史：
  * 作者： MZ
  * 创建时间： 2016年1月6日-上午10:00:07
  */
 package com.student.dao;

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

 import com.student.base.BaseDAO;
 import com.student.model.Student;

 /**
  * 模块说明： 学生增删改查
  *
  */
 public class StudentDAO extends BaseDAO {
     private final int fieldNum = 9;
     private final int showNum = 15;
     private static StudentDAO sd = null;

     public static synchronized StudentDAO getInstance() {
         if (sd == null) {
             sd = new StudentDAO();
         }
         return sd;
     }

     // update
     public boolean update(Student stu) {
         boolean result = false;
         if (stu == null) {
             return result;
         }
         try {
             // check
             if (queryBySno(stu.getSno()) == 0) {
                 return result;
             }
             // update
             String sql = "update student set sex=?,department=?,email=?,tel=?,hometown=?,mark=? where name=? and sno=?";
             String[] param = { stu.getSex(), stu.getDepartment(), stu.getEmail(), stu.getTel(), stu.getHomeTown(),
                     stu.getMark(), stu.getName(), stu.getSno() };
             int rowCount = db.executeUpdate(sql, param);
             if (rowCount == 1) {
                 result = true;
             }
         } catch (SQLException se) {
             se.printStackTrace();
         } finally {
             destroy();
         }
         return result;
     }

     // delete
     public boolean delete(Student stu) {
         boolean result = false;
         if (stu == null) {
             return result;
         }
         String sql = "delete from student where name=? and sno=?";
         String[] param = { stu.getName(), stu.getSno() };
         int rowCount = db.executeUpdate(sql, param);
         if (rowCount == 1) {
             result = true;
         }
         destroy();
         return result;
     }

     // add
     public boolean add(Student stu) {
         boolean result = false;
         if (stu == null) {
             return result;
         }
         try {
             // check
             if (queryBySno(stu.getSno()) == 1) {
                 return result;
             }
             // insert
             String sql = "insert into student(name,sno,sex,department,hometown,mark,email,tel) values(?,?,?,?,?,?,?,?)";
             String[] param = { stu.getName(), stu.getSno(), stu.getSex(), stu.getDepartment(), stu.getHomeTown(),
                     stu.getMark(), stu.getEmail(), stu.getTel() };
             if (db.executeUpdate(sql, param) == 1) {
                 result = true;
             }
         } catch (SQLException se) {
             se.printStackTrace();
         } finally {
             destroy();
         }
         return result;
     }

     // query by name
     public String[][] queryByName(String name) {
         String[][] result = null;
         if (name.length() < 0) {
             return result;
         }
         List stus = new ArrayList();
         int i = 0;
         String sql = "select * from student where name like ?";
         String[] param = { "%" + name + "%" };
         rs = db.executeQuery(sql, param);
         try {
             while (rs.next()) {
                 buildList(rs, stus, i);
                 i++;
             }
             if (stus.size() > 0) {
                 result = new String[stus.size()][fieldNum];
                 for (int j = 0; j < stus.size(); j++) {
                     buildResult(result, stus, j);
                 }
             }
         } catch (SQLException se) {
             se.printStackTrace();
         } finally {
             destroy();
         }

         return result;
     }

     // query
     public String[][] list(int pageNum) {
         String[][] result = null;
         if (pageNum < 1) {
             return result;
         }
         List stus = new ArrayList();
         int i = 0;
         int beginNum = (pageNum - 1) * showNum;
         String sql = "select * from student limit ?,?";
         Integer[] param = { beginNum, showNum };
         rs = db.executeQuery(sql, param);
         try {
             while (rs.next()) {
                 buildList(rs, stus, i);
                 i++;
             }
             if (stus.size() > 0) {
                 result = new String[stus.size()][fieldNum];
                 for (int j = 0; j < stus.size(); j++) {
                     buildResult(result, stus, j);
                 }
             }
         } catch (SQLException se) {
             se.printStackTrace();
         } finally {
             destroy();
         }

         return result;
     }

     // 将rs记录添加到list中
     private void buildList(ResultSet rs, List list, int i) throws SQLException {
         Student stu = new Student();
         stu.setId(i + 1);
         stu.setName(rs.getString("name"));
         stu.setDepartment(rs.getString("department"));
         stu.setEmail(rs.getString("email"));
         stu.setHomeTown(rs.getString("hometown"));
         stu.setMark(rs.getString("mark"));
         stu.setSex(rs.getString("sex"));
         stu.setSno(rs.getString("sno"));
         stu.setTel(rs.getString("tel"));
         list.add(stu);
     }

     // 将list中记录添加到二维数组中
     private void buildResult(String[][] result, List stus, int j) {
         Student stu = stus.get(j);
         result[j][0] = String.valueOf(stu.getId());
         result[j][1] = stu.getName();
         result[j][2] = stu.getSno();
         result[j][3] = stu.getSex();
         result[j][4] = stu.getDepartment();
         result[j][5] = stu.getHomeTown();
         result[j][6] = stu.getMark();
         result[j][7] = stu.getEmail();
         result[j][8] = stu.getTel();
     }

     // query by sno
     private int queryBySno(String sno) throws SQLException {
         int result = 0;
         if ("".equals(sno) || sno == null) {
             return result;
         }
         String checkSql = "select * from student where sno=?";
         String[] checkParam = { sno };
         rs = db.executeQuery(checkSql, checkParam);
         if (rs.next()) {
             result = 1;
         }
         return result;
     }

 }

6、 view：与用户交互的界面（包括LoginView.java、MainView.java、AddView.java、DeleteView.java、UpdateView.java），主 要使用DAO提供的接口，由于篇幅原因，仅列出MainView即首页。

 /**
  * 项目名：student
  * 修改历史：
  * 作者： MZ
  * 创建时间： 2016年1月6日-下午1:37:39
  */
 package com.student.view;

 import java.awt.BorderLayout;
 import java.awt.GridLayout;
 import java.awt.event.ActionEvent;
 import java.awt.event.ActionListener;
 import java.awt.event.KeyAdapter;
 import java.awt.event.KeyEvent;

 import javax.swing.JButton;
 import javax.swing.JFrame;
 import javax.swing.JLabel;
 import javax.swing.JPanel;
 import javax.swing.JScrollPane;
 import javax.swing.JTable;
 import javax.swing.JTextField;
 import javax.swing.table.DefaultTableCellRenderer;
 import javax.swing.table.DefaultTableModel;
 import javax.swing.table.TableColumn;

 import com.student.AppConstants;
 import com.student.DAO;
 import com.student.base.BaseDAO;
 import com.student.dao.StudentDAO;

 /**
  * 模块说明： 首页
  *
  */
 public class MainView extends JFrame {

     private static final long serialVersionUID = 5870864087464173884L;

     private final int maxPageNum = 99;

     private JPanel jPanelNorth, jPanelSouth, jPanelCenter;
     private JButton jButtonFirst, jButtonLast, jButtonNext, jButtonPre, jButtonAdd, jButtonDelete, jButtonUpdate,
             jButtonFind;
     private JLabel currPageNumJLabel;
     private JTextField condition;
     public static JTable jTable;
     private JScrollPane jScrollPane;
     private DefaultTableModel myTableModel;

     public static String[] column = { "id", AppConstants.STUDENT_NAME, AppConstants.STUDENT_SNO,
             AppConstants.STUDENT_SEX, AppConstants.STUDENT_DEPARTMETN, AppConstants.STUDENT_HOMETOWN,
             AppConstants.STUDENT_MARK, AppConstants.STUDENT_EMAIL, AppConstants.STUDENT_TEL };
     public static int currPageNum = 1;

     public MainView() {
         init();
     }

     private void init() {
         setTitle(AppConstants.MAINVIEW_TITLE);

         // north panel
         jPanelNorth = new JPanel();
         jPanelNorth.setLayout(new GridLayout(1, 5));
         condition = new JTextField(AppConstants.PARAM_FIND_CONDITION);
         condition.addKeyListener(new FindListener());
         jPanelNorth.add(condition);
         // query by name
         jButtonFind = new JButton(AppConstants.PARAM_FIND);
         jButtonFind.addActionListener(new ActionListener() {
             @Override
             public void actionPerformed(ActionEvent e) {
                 find();
             }
         });
         jButtonFind.addKeyListener(new FindListener());
         // add
         jPanelNorth.add(jButtonFind);
         jButtonAdd = new JButton(AppConstants.PARAM_ADD);
         jButtonAdd.addActionListener(new ActionListener() {
             @Override
             public void actionPerformed(ActionEvent e) {
                 new AddView();
             }
         });
         jPanelNorth.add(jButtonAdd);
         // delete
         jButtonDelete = new JButton(AppConstants.PARAM_DELETE);
         jButtonDelete.addActionListener(new ActionListener() {
             @Override
             public void actionPerformed(ActionEvent e) {
                 new DeleteView();
             }
         });
         jPanelNorth.add(jButtonDelete);
         // update
         jButtonUpdate = new JButton(AppConstants.PARAM_UPDATE);
         jButtonUpdate.addActionListener(new ActionListener() {
             @Override
             public void actionPerformed(ActionEvent e) {
                 new UpdateView();
             }
         });
         jPanelNorth.add(jButtonUpdate);

         // center panel
         jPanelCenter = new JPanel();
         jPanelCenter.setLayout(new GridLayout(1, 1));

         // init jTable
         String[][] result = ((StudentDAO) BaseDAO.getAbilityDAO(DAO.StudentDAO)).list(currPageNum);
         myTableModel = new DefaultTableModel(result, column);
         jTable = new JTable(myTableModel);
         DefaultTableCellRenderer cr = new DefaultTableCellRenderer();
         cr.setHorizontalAlignment(JLabel.CENTER);
         jTable.setDefaultRenderer(Object.class, cr);
         initJTable(jTable, result);

         jScrollPane = new JScrollPane(jTable);
         jPanelCenter.add(jScrollPane);

         // south panel
         jPanelSouth = new JPanel();
         jPanelSouth.setLayout(new GridLayout(1, 5));

         jButtonFirst = new JButton(AppConstants.MAINVIEW_FIRST);
         jButtonFirst.addActionListener(new ActionListener() {
             @Override
             public void actionPerformed(ActionEvent e) {
                 currPageNum = 1;
                 String[][] result = ((StudentDAO) BaseDAO.getAbilityDAO(DAO.StudentDAO)).list(currPageNum);
                 initJTable(jTable, result);
                 currPageNumJLabel.setText(AppConstants.MAINVIEW_PAGENUM_JLABEL_DI + currPageNum
                         + AppConstants.MAINVIEW_PAGENUM_JLABEL_YE);
             }
         });
         jButtonPre = new JButton(AppConstants.MAINVIEW_PRE);
         jButtonPre.addActionListener(new ActionListener() {

             @Override
             public void actionPerformed(ActionEvent e) {
                 currPageNum--;
                 if (currPageNum <= 0) {
                     currPageNum = 1;
                 }
                 String[][] result = ((StudentDAO) BaseDAO.getAbilityDAO(DAO.StudentDAO)).list(currPageNum);
                 initJTable(jTable, result);
                 currPageNumJLabel.setText(AppConstants.MAINVIEW_PAGENUM_JLABEL_DI + currPageNum
                         + AppConstants.MAINVIEW_PAGENUM_JLABEL_YE);
             }
         });
         jButtonNext = new JButton(AppConstants.MAINVIEW_NEXT);
         jButtonNext.addActionListener(new ActionListener() {
             @Override
             public void actionPerformed(ActionEvent e) {
                 currPageNum++;
                 if (currPageNum > maxPageNum) {
                     currPageNum = maxPageNum;
                 }
                 String[][] result = ((StudentDAO) BaseDAO.getAbilityDAO(DAO.StudentDAO)).list(currPageNum);
                 initJTable(jTable, result);
                 currPageNumJLabel.setText(AppConstants.MAINVIEW_PAGENUM_JLABEL_DI + currPageNum
                         + AppConstants.MAINVIEW_PAGENUM_JLABEL_YE);
             }
         });
         jButtonLast = new JButton(AppConstants.MAINVIEW_LAST);
         jButtonLast.addActionListener(new ActionListener() {
             @Override
             public void actionPerformed(ActionEvent e) {
                 currPageNum = maxPageNum;
                 String[][] result = ((StudentDAO) BaseDAO.getAbilityDAO(DAO.StudentDAO)).list(currPageNum);
                 initJTable(jTable, result);
                 currPageNumJLabel.setText(AppConstants.MAINVIEW_PAGENUM_JLABEL_DI + currPageNum
                         + AppConstants.MAINVIEW_PAGENUM_JLABEL_YE);
             }
         });

         currPageNumJLabel = new JLabel(
                 AppConstants.MAINVIEW_PAGENUM_JLABEL_DI + currPageNum + AppConstants.MAINVIEW_PAGENUM_JLABEL_YE);
         currPageNumJLabel.setHorizontalAlignment(JLabel.CENTER);

         jPanelSouth.add(jButtonFirst);
         jPanelSouth.add(jButtonPre);
         jPanelSouth.add(currPageNumJLabel);
         jPanelSouth.add(jButtonNext);
         jPanelSouth.add(jButtonLast);

         this.add(jPanelNorth, BorderLayout.NORTH);
         this.add(jPanelCenter, BorderLayout.CENTER);
         this.add(jPanelSouth, BorderLayout.SOUTH);

         setBounds(400, 200, 750, 340);
         setResizable(false);
         setDefaultCloseOperation(DISPOSE_ON_CLOSE);
         setVisible(true);
     }

     public static void initJTable(JTable jTable, String[][] result) {
         ((DefaultTableModel) jTable.getModel()).setDataVector(result, column);
         jTable.setRowHeight(20);
         TableColumn firsetColumn = jTable.getColumnModel().getColumn(0);
         firsetColumn.setPreferredWidth(30);
         firsetColumn.setMaxWidth(30);
         firsetColumn.setMinWidth(30);
         TableColumn secondColumn = jTable.getColumnModel().getColumn(1);
         secondColumn.setPreferredWidth(60);
         secondColumn.setMaxWidth(60);
         secondColumn.setMinWidth(60);
         TableColumn thirdColumn = jTable.getColumnModel().getColumn(2);
         thirdColumn.setPreferredWidth(90);
         thirdColumn.setMaxWidth(90);
         thirdColumn.setMinWidth(90);
         TableColumn fourthColumn = jTable.getColumnModel().getColumn(3);
         fourthColumn.setPreferredWidth(30);
         fourthColumn.setMaxWidth(30);
         fourthColumn.setMinWidth(30);
         TableColumn seventhColumn = jTable.getColumnModel().getColumn(6);
         seventhColumn.setPreferredWidth(30);
         seventhColumn.setMaxWidth(30);
         seventhColumn.setMinWidth(30);
         TableColumn ninthColumn = jTable.getColumnModel().getColumn(8);
         ninthColumn.setPreferredWidth(90);
         ninthColumn.setMaxWidth(90);
         ninthColumn.setMinWidth(90);
     }

     private class FindListener extends KeyAdapter {

         @Override
         public void keyPressed(KeyEvent e) {
             if (e.getKeyCode() == KeyEvent.VK_ENTER) {
                 find();
             }
         }
     }

     private void find() {
         currPageNum = 0;
         String param = condition.getText();
         if ("".equals(param) || param == null) {
             initJTable(MainView.jTable, null);
             currPageNumJLabel.setText(AppConstants.MAINVIEW_FIND_JLABEL);
             return;
         }
         String[][] result = ((StudentDAO) BaseDAO.getAbilityDAO(DAO.StudentDAO)).queryByName(param);
         condition.setText("");
         initJTable(MainView.jTable, result);
         currPageNumJLabel.setText(AppConstants.MAINVIEW_FIND_JLABEL);
     }

 }