Java登录界面与学生信息管理系统-优快云博客

1.首先建立一个LoginJFrame 类代码如下：

package java大作业终极版;

import java.awt.BorderLayout;
import java.awt.EventQueue;

import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.border.EmptyBorder;
import java.awt.GridBagLayout;
import java.awt.Window.Type;
import javax.swing.JLabel;
import java.awt.Font;
import javax.swing.JTextField;
import javax.swing.JButton;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;

public class LoginJFrame extends JFrame {

   private JPanel contentPane;
   private JTextField textField;
   private JTextField textField_1;

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

   /**
   * Create the frame.
   */
   public LoginJFrame() {
       setTitle("登录界面");
       setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
       setBounds(100, 100, 381, 300);
       contentPane = new JPanel();
       contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
       setContentPane(contentPane);
       contentPane.setLayout(null);

       JLabel label = new JLabel("用户名：");
       label.setFont(new Font("宋体", Font.PLAIN, 16));
       label.setBounds(78, 71, 74, 29);
       contentPane.add(label);

       JLabel label_1 = new JLabel("密码：");
       label_1.setFont(new Font("宋体", Font.PLAIN, 16));
       label_1.setBounds(78, 124, 74, 29);
       contentPane.add(label_1);

       textField = new JTextField();
       textField.setBounds(150, 76, 136, 21);
       contentPane.add(textField);
       textField.setColumns(10);

       textField_1 = new JTextField();
       textField_1.setBounds(150, 129, 136, 21);
       contentPane.add(textField_1);
       textField_1.setColumns(10);

       JButton button = new JButton("登录");
       button.addActionListener(new ActionListener() {
           public void actionPerformed(ActionEvent arg0) {
               new DisplayJFrame().setVisible(true);
           }
       });
       button.setFont(new Font("宋体", Font.PLAIN, 16));
       button.setBounds(219, 197, 67, 29);
       contentPane.add(button);

       JButton button_1 = new JButton("退出");
       button_1.addActionListener(new ActionListener() {
           public void actionPerformed(ActionEvent arg0) {
               System.exit(0);
           }
       });
       button_1.setFont(new Font("宋体", Font.PLAIN, 16));
       button_1.setBounds(78, 197, 67, 29);
       contentPane.add(button_1);
   }
}

2.建立一个类名为DisplayJFrame

package java大作业终极版;

import java.awt.BorderLayout;
import java.awt.EventQueue;

import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.border.EmptyBorder;

import java.awt.Window.Type;
import javax.swing.JLabel;
import java.awt.Font;
import javax.swing.JTextField;
import javax.swing.JTextArea;
import javax.swing.JButton;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import javax.swing.DropMode;

public class DisplayJFrame extends JFrame {

   private JPanel contentPane;
   private JTextField textField;
   private JTextField textField_1;
   private JTextField textField_2;
   private JTextField textField_3;
   private JTextField textField_4;
   private JTextField textField_5;
   private JTextField textField_6;

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

   /**
   * Create the frame.
   */
   public DisplayJFrame() {
       setType(Type.UTILITY);
       setTitle("主界面");
       setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
       setBounds(100, 100, 450, 500);
       contentPane = new JPanel();
       contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
       setContentPane(contentPane);
       contentPane.setLayout(null);

       JLabel label = new JLabel("学生姓名：");
       label.setFont(new Font("宋体", Font.PLAIN, 14));
       label.setBounds(30, 20, 87, 26);
       contentPane.add(label);

       JLabel label_1 = new JLabel("学生性别：");
       label_1.setFont(new Font("宋体", Font.PLAIN, 14));
       label_1.setBounds(30, 60, 87, 26);
       contentPane.add(label_1);

       JLabel label_2 = new JLabel("学生年龄：");
       label_2.setFont(new Font("宋体", Font.PLAIN, 14));
       label_2.setBounds(30, 100, 87, 26);
       contentPane.add(label_2);

       JLabel label_3 = new JLabel("高考考号：");
       label_3.setFont(new Font("宋体", Font.PLAIN, 14));
       label_3.setBounds(30, 140, 87, 26);
       contentPane.add(label_3);

       JLabel label_4 = new JLabel("身份证号：");
       label_4.setFont(new Font("宋体", Font.PLAIN, 14));
       label_4.setBounds(30, 180, 87, 26);
       contentPane.add(label_4);

       JLabel label_5 = new JLabel("高考分数：");
       label_5.setFont(new Font("宋体", Font.PLAIN, 14));
       label_5.setBounds(30, 247, 87, 26);
       contentPane.add(label_5);

       textField = new JTextField();
       textField.setBounds(127, 23, 250, 21);
       contentPane.add(textField);
       textField.setColumns(10);

       textField_1 = new JTextField();
       textField_1.setBounds(127, 63, 250, 21);
       contentPane.add(textField_1);
       textField_1.setColumns(10);

       textField_2 = new JTextField();
       textField_2.setBounds(127, 103, 250, 21);
       contentPane.add(textField_2);
       textField_2.setColumns(10);

       textField_3 = new JTextField();
       textField_3.setBounds(127, 143, 250, 21);
       contentPane.add(textField_3);
       textField_3.setColumns(10);

       textField_4 = new JTextField();
       textField_4.setBounds(127, 183, 250, 21);
       contentPane.add(textField_4);
       textField_4.setColumns(10);

       textField_5 = new JTextField();
       textField_5.setBounds(127, 250, 250, 21);
       contentPane.add(textField_5);
       textField_5.setColumns(10);

       textField_6 = new JTextField();
       textField_6.setBounds(127, 219, 250, 21);
       contentPane.add(textField_6);
       textField_6.setColumns(10);

       JTextArea textArea = new JTextArea();
       textArea.setLineWrap(true);
       textArea.setBounds(30, 327, 377, 112);
       contentPane.add(textArea);

       JButton button = new JButton("添加");
       button.addActionListener(new ActionListener() {
           public void actionPerformed(ActionEvent arg0) {
               try{
                   //Scanner input=new Scanner(System.in);
                   //Stirng name =input.next();
       String name=textField.getText();
       String sex=textField_1.getText();
       String age=textField_2.getText();
       String examid=textField_3.getText();
       String idcard=textField_4.getText();
       String grade=textField_5.getText();
       String location=textField_6.getText();

       Student student = new Student();
       student.setExamid(examid);
       student.setGrade(Double.parseDouble(grade));
       student.setIdcard(idcard);
       student.setLocation(location);
       student.setName(name);
       student.setAge(Integer.parseInt(age));
       student.setSex(sex);

       StudentDao dao = new StudentDao();
       dao.add(student);

       //弹出一个添加成功的窗体
       textArea.setText("添加成功!");
       }catch(Exception ex){
       textArea.setText("添加失败！\n"+ex.getMessage());

       }
           }
       });
       button.setFont(new Font("宋体", Font.PLAIN, 14));
       button.setBounds(30, 283, 63, 34);
       contentPane.add(button);

       JButton button_1 = new JButton("查询");
       button_1.addActionListener(new ActionListener() {
           public void actionPerformed(ActionEvent arg0) {
               String examid=textField_3.getText();
               String idcard=textField_4.getText();

               StudentDao dao = new StudentDao();
   Student student = dao.find(examid,idcard);
   if(student==null) {
       textArea.setText("查询失败！");
   }
   else {
       //弹出窗体，输出学生信息
       textArea.setText("姓名："+student.getName()+"，性别："+student.getSex()
   +"，年龄："+student.getAge()
   +"，身份证号：" +student.getIdcard()
   +"，准考证号："+student.getExamid()+"\n"+"，籍贯："+student.getLocation()
   +"，高考成绩："+student.getGrade());
   }
           }

       });
       button_1.setFont(new Font("宋体", Font.PLAIN, 14));
       button_1.setBounds(131, 283, 68, 34);
       contentPane.add(button_1);

       JButton button_2 = new JButton("删除");
       button_2.addActionListener(new ActionListener() {
           public void actionPerformed(ActionEvent arg0) {
               try{
   String name=textField.getText();
   StudentDao dao = new StudentDao();
dao.delete(name);

textArea.setText("删除成功！");
}catch(Exception ex) {
   textArea.setText("删除失败！\n"+ex.getMessage());
}
           }
       });
       button_2.setFont(new Font("宋体", Font.PLAIN, 14));
       button_2.setBounds(237, 283, 68, 34);
       contentPane.add(button_2);

       JButton btnNewButton = new JButton("修改");
       btnNewButton.setFont(new Font("宋体", Font.PLAIN, 14));
       btnNewButton.setBounds(338, 283, 69, 34);
       contentPane.add(btnNewButton);

       JLabel label_6 = new JLabel("地址：");
       label_6.setFont(new Font("宋体", Font.PLAIN, 14));
       label_6.setBounds(30, 216, 87, 21);
       contentPane.add(label_6);


   }
}

3.建立student类

package java大作业终极版;

public class Student {

private String idcard;
private String examid;
private String name;
private String location;
private Double grade;
private String sex;
private int age;

public String getIdcard() {
return idcard;
}
public String getSex() {
       return sex;
   }
   public void setSex(String sex) {
       this.sex = sex;
   }
   public int getAge() {
       return age;
   }
   public void setAge(int age) {
       this.age = age;
   }
   public void setIdcard(String idcard) {
this.idcard = idcard;
}
public String getExamid() {
return examid;
}
public void setExamid(String examid) {
this.examid = examid;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getLocation() {
return location;
}
public void setLocation(String location) {
this.location = location;
}
public double getGrade() {
return grade;
}
public void setGrade(double grade) {
this.grade = grade;
}
}

4.建立StudentDao类

package java大作业终极版;

import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.NodeList;

public class StudentDao {
//添加
public void add(Student student){

try{
Document document = XmlUtils.getDocument();

Element student_node = document.createElement("student");
student_node.setAttribute("examid", student.getExamid());
student_node.setAttribute("idcard", student.getIdcard());

Element name = document.createElement("name");
name.setTextContent(student.getName());

Element location = document.createElement("location");
location.setTextContent(student.getLocation());

Element grade = document.createElement("grade");
grade.setTextContent(student.getGrade()+"");

Element age=document.createElement("age");
age.setTextContent(student.getAge()+"");

Element sex=document.createElement("sex");
sex.setTextContent(student.getSex()+"");

student_node.appendChild(name);
student_node.appendChild(location);
student_node.appendChild(grade);
student_node.appendChild(age);
student_node.appendChild(sex);

//得到exam节点，并把student挂上去
document.getElementsByTagName("exam").item(0).appendChild(student_node);

XmlUtils.write2Xml(document);
}catch(Exception e){
throw new RuntimeException(e);
}

}

//删除
public void delete(String name){
try{
Document document = XmlUtils.getDocument();
NodeList list = document.getElementsByTagName("name");
for(int i = 0;i<list.getLength();i++){
if(list.item(i).getTextContent().equals(name)){
list.item(i).getParentNode().getParentNode().removeChild(list.item(i).getParentNode());
XmlUtils.write2Xml(document);
return;
}
}
throw new RuntimeException("对不起，您要删除的学生不存在！");//异常也是一种返回值
}catch(Exception e){
throw new RuntimeException(e);
}
}

//查找
public Student find(String examid,String idcard){
try{
Document document = XmlUtils.getDocument();
NodeList list = document.getElementsByTagName("student");
Student student = new Student();
for(int i = 0;i<list.getLength();i++){
Element student_node = (Element) list.item(i);

if(student_node.getAttribute("examid").equals(examid)&&
student_node.getAttribute("idcard").equals(idcard)){
Student s = new Student();

s.setExamid(examid);
s.setIdcard(idcard);

student.setExamid(student_node.getAttribute("examid"));
student.setIdcard(student_node.getAttribute("idcard"));

s.setName(student_node.getElementsByTagName("name").item(0).getTextContent());
s.setGrade(Double.parseDouble(student_node.getElementsByTagName("grade").item(0).getTextContent()));
s.setLocation(student_node.getElementsByTagName("location").item(0).getTextContent());
s.setAge(Integer.parseInt(student_node.getElementsByTagName("age").item(0).getTextContent()));
s.setSex(student_node.getElementsByTagName("sex").item(0).getTextContent());

return s;
}
}
return null;
}catch(Exception e){
throw new RuntimeException(e);
}
}
}

5.建立XmlUtils类，代码如下：

package java大作业终极版;

import java.io.File;
import java.io.IOException;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.transform.Transformer;

import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;

import org.w3c.dom.Document;
import org.xml.sax.SAXException;

public class XmlUtils {
public static Document getDocument()
   throws ParserConfigurationException, SAXException, IOException{
//定义API的一家工厂，它使应用程序能够获得从xml文档生成DOM对象树的分析器基类。
   DocumentBuilderFactory factory =
       DocumentBuilderFactory.newInstance();//获得一个解析器实例
DocumentBuilder builder = factory.newDocumentBuilder();
//返回一个新的DOM对象
return builder.parse(new File("src/studentXML.xml"));
}

public static void write2Xml(Document document) throws TransformerException{
TransformerFactory factory = TransformerFactory.newInstance();
Transformer tf = factory.newTransformer();
tf.transform(new DOMSource(document), new StreamResult(new File("src/studentXML.xml")));
}
}

6.建立一个名为studentXML文件

<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<exam>
</exam>