1、数据库设计
学生表的表结构如图：
| id | name | sex | age | tel |
|---|---|---|---|---|
| 学号 | 姓名 | 性别 | 年龄 | 电话 |
2、项目架构
link.java：连接数据库，并实现增删改查功能
Student.java：获取数据库数据
test.java：主函数
Windows_xg.java：修改窗口设计
Windows.java：主窗口设计
3、功能页面展示
（1）学生信息显示页面
（2）按学号（id）查询页面
在这里输入学号，点击查找
（3）添加页面
（4）修改页面
源代码
link.java
import java.sql.Connection;import java.sql.DriverManager;import java.sql.ResultSet;import java.sql.SQLException;import java.sql.Statement;import java.util.ArrayList;import java.util.List;public class link {private final static String url = "jdbc:mysql://localhost:3306/student" />;//设置连接路径private final static String username = "root";//数据库用户名private final static String password = "1234";//数据库连接密码private Connection conn;public Connection getCon() {try {Class.forName("com.mysql.cj.jdbc.Driver");System.out.println("驱动加载成功");} catch (ClassNotFoundException e) {e.printStackTrace();}try {conn = DriverManager.getConnection(url, username, password);System.out.println("连接成功");} catch (SQLException e) {e.printStackTrace();}return conn;}public List<Student> list(){//查询语句的执行结果为一个表格，即多个学生对象的集合，所有可以创建数组列表对象来存储List<Student> lst = new ArrayList<Student>();//获取连接对象conn = getCon();try {//连接对象conn调用createStatement()方法，创建一个执行SQL语句的对象stStatement st = conn.createStatement();//执行SQL语句的对象st调用executeQuery()方法，执行查询语句，将查询到的结果返回到一个结果集中ResultSet rs = st.executeQuery("select*from student_ei");//遍历结果集对象while(rs.next()){Student student = new Student();student.setId(rs.getString("id"));student.setName(rs.getString("name"));student.setSex(rs.getString("sex"));student.setAge(rs.getString("age"));student.setTel(rs.getString("tel"));lst.add(student);}}catch (Exception e){System.out.println(e.getMessage());}return lst;}public List<Student> query(int jxf_id) throws SQLException {//获取连接对象conn = getCon();Statement state=conn.createStatement();//容器String sql="select * from student_ei where id= '"+jxf_id+"'"; //sql语句ResultSet rs=state.executeQuery(sql); //将sql语句传至数据库，返回的值为一个字符集用一个变量接收 List<Student> lst_q = new ArrayList<Student>();while(rs.next()){//next（）获取里面的内容//System.out.println(rs.getString(1)+" "+rs.getString(2)+" "+rs.getString(3)+" "+rs.getString(4)+" "+rs.getString(5)); //getString（n）获取第n列的内容//数据库中的列数是从1开始的Student student_q = new Student();student_q.setId(rs.getString("id"));student_q.setName(rs.getString("name"));student_q.setSex(rs.getString("sex"));student_q.setAge(rs.getString("age"));student_q.setTel(rs.getString("tel"));lst_q.add(student_q);}conn.close();return lst_q;}public void increase( String jxf_id_t, String jxf_name_t,String jxf_sex_t,String jxf_age_t,String jxf_tel_t) throws SQLException {conn = getCon();Statement state=conn.createStatement();//容器int jxf_id_t_i=Integer.parseInt(jxf_id_t);int jxf_age_t_i=Integer.parseInt(jxf_age_t);String sql="insert into student_ei values ('"+jxf_id_t_i+"','"+jxf_name_t+"','"+jxf_sex_t+"','"+jxf_age_t_i+"','"+jxf_tel_t+"')";//sql语句state.executeUpdate(sql); //将sql语句传至数据库，返回的值为一个字符集用一个变量接收System.out.print("添加完毕");conn.close();}public void modify(String s_jcbx,String s_id,String s_nr) throws SQLException{conn = getCon();Statement state=conn.createStatement();//容器if(s_jcbx == "学号") {int s_id_i=Integer.parseInt(s_id);int s_nr_i=Integer.parseInt(s_nr);String sql="update student_ei set id = '"+s_nr_i+"' where id = '"+s_id_i+"'";state.executeUpdate(sql); //将sql语句传至数据库，返回的值为一个字符集用一个变量接收System.out.print("添加完毕");conn.close();}else if(s_jcbx == "姓名") {String sql="update student_ei set name = '"+s_nr+"' where id = '"+s_id+"'";state.executeUpdate(sql); //将sql语句传至数据库，返回的值为一个字符集用一个变量接收System.out.print("添加完毕");conn.close();}else if(s_jcbx == "性别") {String sql="update student_ei set sex = '"+s_nr+"' where id = '"+s_id+"'";state.executeUpdate(sql); //将sql语句传至数据库，返回的值为一个字符集用一个变量接收System.out.print("添加完毕");conn.close();}else if(s_jcbx == "年龄") {int s_id_i=Integer.parseInt(s_id);int s_nr_i=Integer.parseInt(s_nr);String sql="update student_ei set age = '"+s_nr_i+"' where id = '"+s_id_i+"'";state.executeUpdate(sql); //将sql语句传至数据库，返回的值为一个字符集用一个变量接收System.out.print("添加完毕");conn.close();}else if(s_jcbx == "电话"){String sql="update student_ei set tel = '"+s_nr+"' where id = '"+s_id+"'";//sql语句state.executeUpdate(sql); //将sql语句传至数据库，返回的值为一个字符集用一个变量接收System.out.print("添加完毕");conn.close();}}}Student.java
public class Student {private String id;private String name;private String sex;private String age;private String tel; public String getId() {return id;} public void setId(String id) {this.id = id;} 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 getAge() {return age;} public void setAge(String age) {this.age = age;}public String getTel() {return tel;} public void setTel(String tel) {this.tel = tel;}}test.java
public class test {public static void main(String arg[]){new Windows();}}Windows_xg.java
import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import java.sql.SQLException;import javax.swing.JButton;import javax.swing.JComboBox;import javax.swing.JFrame;import javax.swing.JLabel;import javax.swing.JPanel;import javax.swing.JTextField;public class Windows_xg implements ActionListener{JFrame jfrm_xg = new JFrame();JPanel jp_xg = new JPanel();JPanel jp_xg_id = new JPanel();JPanel jp_xg_jcb = new JPanel();JPanel jp_xg_nr = new JPanel();JPanel jp_xg_jbt = new JPanel();JLabel lab_xg_id = new JLabel("学生学号:",JLabel.CENTER);JLabel lab_xg_jcb = new JLabel("修改项目:",JLabel.CENTER);JLabel lab_xg_nr = new JLabel("修改内容:",JLabel.CENTER);JTextField jxf_xg_id = new JTextField(10);//文本框长度为10JTextField jxf_xg_nr = new JTextField(10);//文本框长度为10JButton jbtn_xg_xg = new JButton("修改");//查找添加String[] listData = new String[]{"学号", "姓名", "性别", "年龄", "电话",""};final JComboBox<String> jcbx = new JComboBox<String>(listData);public Windows_xg(){jfrm_xg.setVisible(true);//窗体可见jfrm_xg.setTitle("学生信息管理系统_修改");//窗口标题jfrm_xg.setSize(240,220);//设置了一个长为800，高为600的框图。jfrm_xg.setLocation(900,400);//设置一个左上角顶点在（240，135）的窗体。jfrm_xg.add(jp_xg);jp_xg.add(jp_xg_id);jp_xg.add(jp_xg_jcb);jp_xg.add(jp_xg_nr);jp_xg.add(jp_xg_jbt);jp_xg_id.add(lab_xg_id);jp_xg_jcb.add(lab_xg_jcb);jp_xg_nr.add(lab_xg_nr);jp_xg_id.add(jxf_xg_id);jp_xg_nr.add(jxf_xg_nr);jp_xg_jbt.add(jbtn_xg_xg);jp_xg_jcb.add(jcbx);jbtn_xg_xg.addActionListener(this);}@Overridepublic void actionPerformed(ActionEvent e) {// TODO Auto-generated method stubif(e.getSource()==jbtn_xg_xg){String s_jcbx=(String) jcbx.getSelectedItem();System.out.print(s_jcbx + "\n");String s_id = jxf_xg_id.getText();String s_nr = jxf_xg_nr.getText();link link = new link();try {link.modify(s_jcbx,s_id,s_nr);} catch (SQLException e1) {// TODO Auto-generated catch blocke1.printStackTrace();}}}}Windows.java
import java.awt.BorderLayout;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import java.sql.SQLException;import java.util.List;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;public class Windows implements ActionListener{JFrame jfrm = new JFrame();JPanel jp_total = new JPanel(new BorderLayout());//边界布局JPanel jp_1 = new JPanel();JScrollPane jp_c =new JScrollPane();JTextField jxf = new JTextField(10);//文本框长度为10JButton jbtn_cz = new JButton("查找");//查找按钮JButton jbtn_tj = new JButton("添加");//查找添加JButton jbtn_xg = new JButton("修改");//查找修改JButton jbtn_sx = new JButton("刷新");//查找修改//表格JTable jtb=new JTable();DefaultTableModel tableModel = (DefaultTableModel) jtb.getModel();public Windows(){jfrm.setVisible(true);//窗体可见jfrm.setTitle("学生信息管理系统");//窗口标题jfrm.setSize(800,600);//设置了一个长为800，高为600的框图。//jfrm.setBounds(1,2,20,10);//设置一个左上角顶点在（1，2），长为20，宽为10的窗体。jfrm.setLocation(240,135);//设置一个左上角顶点在（240，135）的窗体。jfrm.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);//关闭窗口的时候退出程序jfrm.add(jp_total);jp_total.add(jp_1,BorderLayout.NORTH);jp_1.add(jxf);jbtn_cz.addActionListener(this);jbtn_tj.addActionListener(this);jbtn_xg.addActionListener(this);jbtn_sx.addActionListener(this);jp_1.add(jbtn_cz);jp_1.add(jbtn_tj);jp_1.add(jbtn_xg);jp_1.add(jbtn_sx);jp_c.setViewportView(jtb);jp_total.add(jp_c,BorderLayout.CENTER);//表格tableModel.addColumn("学号");tableModel.addColumn("姓名");tableModel.addColumn("性别");tableModel.addColumn("年龄");tableModel.addColumn("电话");//表格link link = new link();List<Student> lst = link.list();for (int i = 0; i < lst.size(); i++) {Student student = (Student) lst.get(i);tableModel.addRow(new Object[] { student.getId(), student.getName(), student.getSex(),student.getAge(), student.getTel()});}jp_c.setViewportView(jtb);//居中显示DefaultTableCellRenderer dc=new DefaultTableCellRenderer();dc.setHorizontalAlignment(JLabel.CENTER);jtb.setDefaultRenderer(Object.class, dc);}@Overridepublic void actionPerformed(ActionEvent e) {// TODO Auto-generated method stubObject eventSource = e.getSource();if(eventSource == jbtn_cz)//查找{System.out.print("查找");JFrame jfrm_cz = new JFrame();jfrm_cz.setVisible(true);//窗体可见jfrm_cz.setTitle("学生信息管理系统_查找");//窗口标题jfrm_cz.setSize(800,600);//设置了一个长为800，高为600的框图。jfrm_cz.setLocation(260,155);//设置一个左上角顶点在（240，135）的窗体。String jxf_id = jxf.getText();int jxf_id_i=Integer.parseInt(jxf_id);//query(jxf_id_i);JScrollPane jp_c_q =new JScrollPane();jfrm_cz.add(jp_c_q);JTable jtb_q=new JTable();DefaultTableModel tableModel_q = (DefaultTableModel) jtb_q.getModel();//表格tableModel_q.addColumn("学号");tableModel_q.addColumn("姓名");tableModel_q.addColumn("性别");tableModel_q.addColumn("年龄");tableModel_q.addColumn("电话");link link = new link();List<Student> lst_q = null;try {lst_q = link.query(jxf_id_i);} catch (SQLException e1) {// TODO Auto-generated catch blocke1.printStackTrace();}for (int i = 0; i < lst_q.size(); i++) {Student student = (Student) lst_q.get(i);tableModel_q.addRow(new Object[] { student.getId(), student.getName(), student.getSex(),student.getAge(), student.getTel()});}jp_c_q.setViewportView(jtb_q);//居中显示DefaultTableCellRenderer dc=new DefaultTableCellRenderer();dc.setHorizontalAlignment(JLabel.CENTER);jtb_q.setDefaultRenderer(Object.class, dc);}else if(eventSource == jbtn_tj)//添加 {System.out.print("添加\n");JFrame jfrm_tj = new JFrame();jfrm_tj.setVisible(true);//窗体可见jfrm_tj.setTitle("学生信息管理系统_添加");//窗口标题jfrm_tj.setSize(240,280);//设置了一个长为800，高为600的框图。jfrm_tj.setLocation(900,400);//设置一个左上角顶点在（240，135）的窗体。JPanel jp_tj = new JPanel();JPanel jp_tj_id = new JPanel();JPanel jp_tj_name = new JPanel();JPanel jp_tj_sex = new JPanel();JPanel jp_tj_age = new JPanel();JPanel jp_tj_tel = new JPanel();JPanel jp_tj_tj = new JPanel();jfrm_tj.add(jp_tj);jp_tj.add(jp_tj_id);jp_tj.add(jp_tj_name);jp_tj.add(jp_tj_sex);jp_tj.add(jp_tj_age);jp_tj.add(jp_tj_tel);jp_tj.add(jp_tj_tj);JLabel lab_id = new JLabel("学号:",JLabel.CENTER);JLabel lab_name = new JLabel("姓名:",JLabel.CENTER);JLabel lab_sex = new JLabel("性别:",JLabel.CENTER);JLabel lab_age = new JLabel("年龄:",JLabel.CENTER);JLabel lab_tel = new JLabel("电话:",JLabel.CENTER);jp_tj_id.add(lab_id);jp_tj_name.add(lab_name);jp_tj_sex.add(lab_sex);jp_tj_age.add(lab_age);jp_tj_tel.add(lab_tel);JTextField jxf_id = new JTextField(10);//文本框长度为10JTextField jxf_name = new JTextField(10);//文本框长度为10JTextField jxf_sex = new JTextField(10);//文本框长度为10JTextField jxf_age = new JTextField(10);//文本框长度为10JTextField jxf_tel = new JTextField(10);//文本框长度为10jp_tj_id.add(jxf_id);jp_tj_name.add(jxf_name);jp_tj_sex.add(jxf_sex);jp_tj_age.add(jxf_age);jp_tj_tel.add(jxf_tel);JButton jbtn_tj_tj = new JButton("添加");//查找添加jp_tj_tj.add(jbtn_tj_tj);jbtn_tj_tj.addActionListener(new ActionListener() {@Overridepublic void actionPerformed(ActionEvent e) {if(e.getSource()==jbtn_tj_tj) {System.out.print("添加完毕123");String jxf_id_t = jxf_id.getText();String jxf_name_t = jxf_name.getText();String jxf_sex_t = jxf_sex.getText();String jxf_age_t = jxf_age.getText();String jxf_tel_t = jxf_tel.getText();link link = new link();try {link.increase(jxf_id_t, jxf_name_t, jxf_sex_t, jxf_age_t, jxf_tel_t);} catch (SQLException e1) {// TODO Auto-generated catch blocke1.printStackTrace();}}}}); }else if(eventSource == jbtn_xg)//修改{System.out.print("修改\n");new Windows_xg();}else if(eventSource == jbtn_sx)//修改{System.out.print("刷新\n");int rows = jtb.getRowCount();DefaultTableModel tableModel = (DefaultTableModel) jtb.getModel();for(int i=0;i < rows;i++) {tableModel.removeRow(0);// rowIndex是要删除的行序号}//表格link link = new link();List<Student> lst = link.list();for (int i = 0; i < lst.size(); i++) {Student student = (Student) lst.get(i);tableModel.addRow(new Object[] { student.getId(), student.getName(), student.getSex(),student.getAge(), student.getTel()});}jp_c.setViewportView(jtb);//居中显示DefaultTableCellRenderer dc=new DefaultTableCellRenderer();dc.setHorizontalAlignment(JLabel.CENTER);jtb.setDefaultRenderer(Object.class, dc);}}}