【良心保姆級教程】java手把手教你用swing寫一個學生的增刪改查模塊

很多剛入門的同學，不清楚如何用java、swing去開發出一個系統？

不清楚如何使用java代碼去操作數據庫進行增刪改查一些列操作，不清楚java代碼和數據庫（mysql、sqlserver）之間怎么聯系起來。

一個系統本質上就是一系列的模塊組合起來的，只要懂了一個模塊的實現，其他的自然而然的也就不難。

今天，我們通過做一個學生管理的一個通俗模塊，去給大家演示如何用java+swing+mysql去實現一個學生管理的曾刪改查。

1.前期准備工作，開發工具安裝，主要包括如下開發工具：

• jdk，java開發和運行環境，1.7或者1.8的版本都可以。
• eclispe，java代碼編寫工具，主要用來寫java代碼，當然你可以用idea
• mysql，數據庫，主要用來存儲數據，5.6以上版本，8.0的版本需要注意驅動的升級
• navicat for mysql 數據庫可視化工具，主要用來操作mysql，簡化數據庫操作。

2.以上環境准備好之后，接下來可以進行數據庫表的設計，我們可以用navicat for mysql創建一個數據庫（如何創建，可以自行科普），名字叫做db_demo；

然后再新建一個數據庫表t_student，sql語句如下，可自行拷貝然后執行：

DROP TABLE IF EXISTS `t_student`;
CREATE TABLE `t_student` (
  `id` int(11) NOT NULL AUTO_INCREMENT COMMENT '學生ID',
  `stuno` varchar(32) DEFAULT NULL COMMENT '學號',
  `name` varchar(32) DEFAULT NULL COMMENT '姓名',
  `grade` varchar(32) DEFAULT NULL COMMENT '班級',
  `create_time` datetime DEFAULT NULL COMMENT '添加時間',
  `update_time` datetime DEFAULT NULL COMMENT '修改時間',
  PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

這樣數據庫表，就已經創建好了。數據庫表一般對應一個entity實體類，字段互相對應，實體類代碼如下：

package com.xiaoniucr.entity;

import java.util.Date;

/**
 * 學生實體類
 * @author Lenovo
 *
 */
public class Student {
	
	/**
	 * 學生ID
	 */
	private Integer id;
	
	/**
	 * 學號
	 */
	private String stuno;
	
	/**
	 * 姓名
	 */
	private String name;
	
	/**
	 * 班級
	 */
	private String grade;
	
	/**
	 * 添加時間
	 */
	private Date creatTime;
	
	/**
	 * 修改時間
	 */
	private Date updateTime;

	public Integer getId() {
		return id;
	}

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

	public String getStuno() {
		return stuno;
	}

	public void setStuno(String stuno) {
		this.stuno = stuno;
	}

	public String getName() {
		return name;
	}

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

	public String getGrade() {
		return grade;
	}

	public void setGrade(String grade) {
		this.grade = grade;
	}

	public Date getCreatTime() {
		return creatTime;
	}

	public void setCreatTime(Date creatTime) {
		this.creatTime = creatTime;
	}

	public Date getUpdateTime() {
		return updateTime;
	}

	public void setUpdateTime(Date updateTime) {
		this.updateTime = updateTime;
	}
	
	

}

　　

3.接下來我們開始寫java代碼了，首先設計界面，粗略思考一下，包含三個界面：學生列表查詢界面，學生信息添加界面，學生信息修改界面，其中添加界面和修改界面差不多的，界面如下:

查詢界面：

查詢界面設計代碼：

package com.xiaoniucr.view;

import java.awt.EventQueue;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.text.SimpleDateFormat;
import java.util.List;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.JTextField;
import javax.swing.border.EmptyBorder;
import javax.swing.table.DefaultTableModel;

import com.xiaoniucr.dao.StudentDao;
import com.xiaoniucr.entity.Student;

public class UserListView extends JFrame {

	private JPanel contentPane;
	private JTable table;
	private JTextField nameText;

	private StudentDao studentDao = new StudentDao();

	/**
	 * Launch the application.
	 */
	public static void main(String[] args) {
		EventQueue.invokeLater(new Runnable() {
			public void run() {
				try {
					UserListView frame = new UserListView();
					frame.setVisible(true);
				} catch (Exception e) {
					e.printStackTrace();
				}
			}
		});
	}

	/**
	 * Create the frame.
	 */
	public UserListView() {

		setTitle("學生列表");
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		setBounds(100, 100, 600, 337);
		setLocationRelativeTo(null);
		
		contentPane = new JPanel();
		contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
		setContentPane(contentPane);
		contentPane.setLayout(null);

		JScrollPane scrollPane = new JScrollPane();
		scrollPane.setBounds(10, 39, 564, 232);
		contentPane.add(scrollPane);

		Object[] columns = { "ID", "學號", "姓名", "年級", "添加時間" };// 字段
		Object[][] data = null;// 需要展示的數據，一般是二維數組
		DefaultTableModel model = new DefaultTableModel(data, columns);
		table = new JTable(model);
		//加載學生數據
		load(null);
		scrollPane.setViewportView(table);

		JLabel lblNewLabel = new JLabel("姓名");
		lblNewLabel.setBounds(10, 10, 42, 15);
		contentPane.add(lblNewLabel);

		nameText = new JTextField();
		nameText.setBounds(44, 8, 115, 21);
		contentPane.add(nameText);
		nameText.setColumns(10);

		//查詢按鈕
		JButton searchBtn = new JButton("查詢");
		searchBtn.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				load(nameText.getText());
			}
		});
		searchBtn.setBounds(169, 8, 63, 23);
		contentPane.add(searchBtn);

		//添加按鈕
		JButton addBtn = new JButton("添加");
		addBtn.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				AddView view = new AddView();
				view.setVisible(true);
			}
		});
		addBtn.setBounds(365, 8, 63, 23);
		contentPane.add(addBtn);

		//修改按鈕
		JButton updateBtn = new JButton("修改");
		updateBtn.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				// 獲取選中行
				int row = table.getSelectedRow();
				if (row < 0) {
					JOptionPane.showMessageDialog(contentPane, "請選擇一條記錄", "系統提示", JOptionPane.WARNING_MESSAGE);
					return;
				}
				int id = Integer.valueOf(table.getValueAt(row, 0).toString());
				UpdateView view = new UpdateView(id);
				view.setVisible(true);
				
			}
		});
		updateBtn.setBounds(438, 8, 63, 23);

		//刪除按鈕
		JButton deleteBtn = new JButton("刪除");
		deleteBtn.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				// 獲取選中行
				int row = table.getSelectedRow();
				if (row < 0) {
					JOptionPane.showMessageDialog(contentPane, "請選擇一條記錄", "系統提示", JOptionPane.WARNING_MESSAGE);
					return;
				}
				int result = JOptionPane.showConfirmDialog(contentPane, "確認刪除該學生嗎？", "提示",
						JOptionPane.YES_NO_OPTION);
				if (result == 0) {
					int id = Integer.valueOf(table.getValueAt(row, 0).toString());
					boolean flag = studentDao.delete(id);
					if(flag){
						JOptionPane.showMessageDialog(contentPane, "刪除成功!");
						load(null);
					}else{
						JOptionPane.showMessageDialog(contentPane, "操作失敗", "系統提示", JOptionPane.WARNING_MESSAGE);
						
					}
				}
				return;
			}
		});
		deleteBtn.setBounds(511, 8, 63, 23);
		contentPane.add(deleteBtn);
		contentPane.add(updateBtn);
	}

	// 填充表格數據
	public void load(String name){
		List<Student> list = studentDao.queryList(name);
		DefaultTableModel tableModel = (DefaultTableModel) table.getModel();
		tableModel.setRowCount(0);// 清除原有行
		// 填充數據
		SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
		for (Student item : list) {
			String[] arr = new String[5];
			arr[0] = item.getId() + "";
			arr[1] = item.getStuno();
			arr[2] = item.getName();
			arr[3] = item.getGrade();
			arr[4] = sdf.format(item.getCreatTime());
			// 添加數據到表格
			tableModel.addRow(arr);
		}
	}
}

添加界面：

添加界面代碼：

package com.xiaoniucr.view;

import java.awt.EventQueue;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.border.EmptyBorder;

import com.xiaoniucr.dao.StudentDao;
import com.xiaoniucr.entity.Student;

public class AddView extends JFrame {

	private JPanel contentPane;
	private JTextField stunoText;
	private JTextField nameText;
	private JTextField gradeText;
	
	private StudentDao studentDao = new StudentDao();

	/**
	 * Launch the application.
	 */
	public static void main(String[] args) {
		EventQueue.invokeLater(new Runnable() {
			public void run() {
				try {
					AddView frame = new AddView();
					frame.setVisible(true);
				} catch (Exception e) {
					e.printStackTrace();
				}
			}
		});
	}

	/**
	 * Create the frame.
	 */
	public AddView() {
		setTitle("學生添加");
		setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
		setBounds(100, 100, 443, 300);
		setLocationRelativeTo(null);
		contentPane = new JPanel();
		contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
		setContentPane(contentPane);
		contentPane.setLayout(null);
		
		JLabel lblNewLabel = new JLabel("學號：");
		lblNewLabel.setBounds(112, 50, 43, 15);
		contentPane.add(lblNewLabel);
		
		stunoText = new JTextField();
		stunoText.setBounds(151, 47, 160, 21);
		contentPane.add(stunoText);
		stunoText.setColumns(10);
		
		JLabel lblNewLabel_1 = new JLabel("姓名：");
		lblNewLabel_1.setBounds(112, 93, 43, 15);
		contentPane.add(lblNewLabel_1);
		
		nameText = new JTextField();
		nameText.setBounds(151, 90, 160, 21);
		contentPane.add(nameText);
		nameText.setColumns(10);
		
		JLabel lblNewLabel_2 = new JLabel("班級：");
		lblNewLabel_2.setBounds(111, 134, 43, 15);
		contentPane.add(lblNewLabel_2);
		
		gradeText = new JTextField();
		gradeText.setBounds(151, 131, 160, 21);
		contentPane.add(gradeText);
		gradeText.setColumns(10);
		
		//保存
		JButton saveBtn = new JButton("保存");
		saveBtn.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				
				String stuno = stunoText.getText();
				String name = nameText.getText();
				String grade = gradeText.getText();
				if(stuno == null || "".equals(stuno)){
					JOptionPane.showMessageDialog(contentPane, "請輸入學號", "系統提示", JOptionPane.WARNING_MESSAGE);
					return;
				}
				if(name == null || "".equals(name)){
					JOptionPane.showMessageDialog(contentPane, "請輸入姓名", "系統提示", JOptionPane.WARNING_MESSAGE);
					return;
				}
				if(grade == null || "".equals(grade)){
					JOptionPane.showMessageDialog(contentPane, "請輸入班級", "系統提示", JOptionPane.WARNING_MESSAGE);
					return;
				}
				Student student = new Student();
				student.setStuno(stuno);
				student.setName(name);
				student.setGrade(grade);
				boolean flag = studentDao.save(student);
				if(flag){
					dispose();
					JOptionPane.showMessageDialog(contentPane, "添加成功，刷新可查看!");
				}else{
					JOptionPane.showMessageDialog(contentPane, "操作失敗", "系統提示", JOptionPane.WARNING_MESSAGE);
				}
				return;
				
				
			}
		});
		saveBtn.setBounds(151, 180, 74, 23);
		contentPane.add(saveBtn);
		
		//取消
		JButton cancleBtn = new JButton("取消");
		cancleBtn.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				dispose();
			}
		});
		cancleBtn.setBounds(237, 180, 74, 23);
		contentPane.add(cancleBtn);
	}

}

修改界面：

 修改界面代碼：

package com.xiaoniucr.view;

import java.awt.EventQueue;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.border.EmptyBorder;

import com.xiaoniucr.dao.StudentDao;
import com.xiaoniucr.entity.Student;

public class UpdateView extends JFrame {

	private JPanel contentPane;
	private JTextField stunoText;
	private JTextField nameText;
	private JTextField gradeText;
	
	private StudentDao studentDao = new StudentDao();

	/**
	 * Launch the application.
	 */
	public static void main(String[] args) {
		EventQueue.invokeLater(new Runnable() {
			public void run() {
				try {
					UpdateView frame = new UpdateView(1);
					frame.setVisible(true);
				} catch (Exception e) {
					e.printStackTrace();
				}
			}
		});
	}

	/**
	 * Create the frame.
	 */
	public UpdateView(final int id) {
		setTitle("學生編輯");
		setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
		setBounds(100, 100, 443, 300);
		setLocationRelativeTo(null);
		contentPane = new JPanel();
		contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
		setContentPane(contentPane);
		contentPane.setLayout(null);
		
		JLabel lblNewLabel = new JLabel("學號：");
		lblNewLabel.setBounds(112, 50, 43, 15);
		contentPane.add(lblNewLabel);
		
		stunoText = new JTextField();
		stunoText.setBounds(151, 47, 160, 21);
		contentPane.add(stunoText);
		stunoText.setColumns(10);
		
		JLabel lblNewLabel_1 = new JLabel("姓名：");
		lblNewLabel_1.setBounds(112, 93, 43, 15);
		contentPane.add(lblNewLabel_1);
		
		nameText = new JTextField();
		nameText.setBounds(151, 90, 160, 21);
		contentPane.add(nameText);
		nameText.setColumns(10);
		
		JLabel lblNewLabel_2 = new JLabel("班級：");
		lblNewLabel_2.setBounds(111, 134, 43, 15);
		contentPane.add(lblNewLabel_2);
		
		gradeText = new JTextField();
		gradeText.setBounds(151, 131, 160, 21);
		contentPane.add(gradeText);
		gradeText.setColumns(10);
		
		//保存
		JButton saveBtn = new JButton("保存");
		saveBtn.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				
				String stuno = stunoText.getText();
				String name = nameText.getText();
				String grade = gradeText.getText();
				if(stuno == null || "".equals(stuno)){
					JOptionPane.showMessageDialog(contentPane, "請輸入學號", "系統提示", JOptionPane.WARNING_MESSAGE);
					return;
				}
				if(name == null || "".equals(name)){
					JOptionPane.showMessageDialog(contentPane, "請輸入姓名", "系統提示", JOptionPane.WARNING_MESSAGE);
					return;
				}
				if(grade == null || "".equals(grade)){
					JOptionPane.showMessageDialog(contentPane, "請輸入班級", "系統提示", JOptionPane.WARNING_MESSAGE);
					return;
				}
				Student student = new Student();
				student.setId(id);
				student.setStuno(stuno);
				student.setName(name);
				student.setGrade(grade);
				boolean flag = studentDao.update(student);
				if(flag){
					dispose();
					JOptionPane.showMessageDialog(contentPane, "修改成功，刷新可查看!");
				}else{
					JOptionPane.showMessageDialog(contentPane, "操作失敗", "系統提示", JOptionPane.WARNING_MESSAGE);
				}
				return;
				
				
			}
		});
		saveBtn.setBounds(151, 180, 74, 23);
		contentPane.add(saveBtn);
		
		//取消
		JButton cancleBtn = new JButton("取消");
		cancleBtn.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				dispose();
			}
		});
		cancleBtn.setBounds(237, 180, 74, 23);
		contentPane.add(cancleBtn);
		
		//數據回顯
		Student student = studentDao.getById(id);
		stunoText.setText(student.getStuno());
		nameText.setText(student.getName());
		gradeText.setText(student.getGrade());
	}

}

4.界面設計完成之后，就是連接數據庫了，連接數據庫需要依賴一個jar包：mysql-connector-java-5.1.21.jar，數據庫連接代碼如下：包含數據庫的連接和使用完成之后的一些資源釋放。

package com.xiaoniucr.util;

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

public class JDBCUtils {

	//數據庫連接地址
	public static String URL = "jdbc:mysql://localhost:3306/db_demo?useUnicode=true&characterEncoding=utf8";
	//數據庫驅動
	public static String DRIVER = "com.mysql.jdbc.Driver";
	//數據庫用戶名
	public static String USER = "root";
	//數據庫密碼
	public static String PWD = "123456";

	/*
	 * 數據庫連接
	 */
	public static Connection getConnection() {

		Connection con = null;
		try {
			// 加載驅動
			Class.forName(DRIVER);
			// 獲取連接對象
			con = DriverManager.getConnection(URL, USER, PWD);
		} catch (ClassNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		return con;
	}

	/**
	 * 關閉連接資源
	 * @param con	連接對象
	 * @param pstmt	預編譯對象
	 * @param rs	結果集
	 */
	public static void close(Connection con, PreparedStatement pstmt, ResultSet rs) {

		try {
			if (rs != null){
				rs.close();
			}
			if (pstmt != null){
				pstmt.close();
			}
			if (con != null){
				con.close();
			}
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}

	}

}

5.數據庫連接完成之后，就是數據庫的操作了，這里包含三個操作，學生列表的查詢，學生信息的添加保存到數據庫，和學生信息的修改保存，數據庫操作代碼如下：

package com.xiaoniucr.dao;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Timestamp;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;

import com.xiaoniucr.entity.Student;
import com.xiaoniucr.util.JDBCUtils;

/**
 * 學生數據庫操作
 * @author Lenovo
 *
 */
public class StudentDao {
	
	
	
	/**
	 * 查詢學生列表
	 * @param name 學生姓名
	 * @return
	 */
	public List<Student> queryList(String name){
		
		
		List<Student> list = new ArrayList<Student>();
		Connection con = null;
		PreparedStatement pstmt = null;
		ResultSet rs = null;
		try {
			con = JDBCUtils.getConnection();
			List<Object> params = new ArrayList<>();
			StringBuffer sb = new StringBuffer("select * from t_student where 1=1 ");
			if(name != null && !"".equals(name)){
				sb.append("and name like ? ");
				params.add(name);
			}
			sb.append("order by create_time desc");
			pstmt = con.prepareStatement(sb.toString());
			if(params != null && params.size()>0){
				for(int i=0; i<params.size(); i++){
					pstmt.setObject(i, params.get(i));
				}
			}
			rs = pstmt.executeQuery();
			while(rs.next()){
				Student student = new Student();
				student.setId(rs.getInt("id"));
				student.setStuno(rs.getString("stuno"));
				student.setName(rs.getString("name"));
				student.setGrade(rs.getString("grade"));
				student.setCreatTime(rs.getDate("create_time"));
				student.setUpdateTime(rs.getDate("update_time"));
				list.add(student);
			}
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}finally {
			JDBCUtils.close(con, pstmt, rs);
		}
		return list;
		
		
	}
	
	
	/**
	 * 保存學生信息
	 * @param student
	 * @return
	 */
	public boolean save(Student student){
		
		Connection con = null;
		String sql = "insert into t_student(stuno,name,grade,create_time,update_time) values(?,?,?,?,?)";
		PreparedStatement pstmt = null;
		try {
			con = JDBCUtils.getConnection();
			pstmt = con.prepareStatement(sql);
			pstmt.setString(1, student.getStuno());
			pstmt.setString(2, student.getName());
			pstmt.setString(3, student.getGrade());
			Date date = new Date();
			pstmt.setTimestamp(4, new Timestamp(date.getTime()));
			pstmt.setTimestamp(5, new Timestamp(date.getTime()));
			int rows = pstmt.executeUpdate();
			if(rows > 0){
				return true;
			}
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} finally {
			JDBCUtils.close(con, pstmt, null);
		}
		return false;
	
	}
	
	
	
	/**
	 * 修改學生信息
	 * @param student
	 * @return
	 */
	public boolean update(Student student){
		
		Connection con = null;
		String sql = "update t_student set stuno=?,name=?,grade=?,update_time=? where id=?";
		PreparedStatement pstmt = null;
		try {
			con = JDBCUtils.getConnection();
			pstmt = con.prepareStatement(sql);
			pstmt.setString(1, student.getStuno());
			pstmt.setString(2, student.getName());
			pstmt.setString(3, student.getGrade());
			Date date = new Date();
			pstmt.setTimestamp(4, new Timestamp(date.getTime()));
			pstmt.setInt(5, student.getId());
			int rows = pstmt.executeUpdate();
			if(rows > 0){
				return true;
			}
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} finally {
			JDBCUtils.close(con, pstmt, null);
		}
		return false;
	
	}
	
	
	
	
	/**
	 * 刪除學生信息
	 * @param student
	 * @return
	 */
	public boolean delete(int id){
		
		Connection con = null;
		String sql = "delete from t_student where id=?";
		PreparedStatement pstmt = null;
		try {
			con = JDBCUtils.getConnection();
			pstmt = con.prepareStatement(sql);
			pstmt.setInt(1, id);
			int rows = pstmt.executeUpdate();
			if(rows > 0){
				return true;
			}
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} finally {
			JDBCUtils.close(con, pstmt, null);
		}
		return false;
	
	}
	
	
	
	/**
	 * 根據ID查詢學生
	 * @param id 學生ID
	 * @return
	 */
	public Student getById(int id){
		
		
		Student student = null;
		Connection con = null;
		PreparedStatement pstmt = null;
		ResultSet rs = null;
		try {
			con = JDBCUtils.getConnection();
			String sql = "select * from t_student where id = ?";
			pstmt = con.prepareStatement(sql);
			pstmt.setObject(1, id);
			rs = pstmt.executeQuery();
			while(rs.next()){
				student = new Student();
				student.setId(rs.getInt("id"));
				student.setStuno(rs.getString("stuno"));
				student.setName(rs.getString("name"));
				student.setGrade(rs.getString("grade"));
				student.setCreatTime(rs.getDate("create_time"));
				student.setUpdateTime(rs.getDate("update_time"));
			}
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}finally {
			JDBCUtils.close(con, pstmt, rs);
		}
		return student;
		
		
	}

}

　　以上就是全部的代碼了，大家可以參考一下，或者直接創建一個項目，然后代碼復制進去，基本都可以跑起來。