java实现科研信息管理系统

一、前言

本学期学习了JAVA语言，在学期的结束，写一个有操作界面，与数据库关联的管理系统，用来巩固自己本学习所学的知识。
用到的知识：JAVA基础，JAVA界面设计（GUI），Oracle数据库（需要掌握数据库的基本操作语句），链接数据库。
使用的开发工具：MyEclipse Professional 2014

二、设计

我们管理的属性有：项目编号，项目名称，参与人员，负责人，项目开始时间，结束时间。科研项目系统主要有四个功能，对科研项目的增加、删除、修改、查询。以及为增加系统安全性所设计的登陆模式。

2.1 增加：向数据库的表中增加科研项目的所有信息

添加后在控制台使用SQL语句查找，验证是否已添加至数据库中。

2.2 查询：通过具有唯一性的项目编号查找该项目的所有信息

2.3 修改：根据项目编号选中要修改的项目，并重新输入项目信息进行修改

2.4 删除：通过具有唯一性的项目编号删除对应项目的所有信息

三、窗体源码

3.1 登录界面

package 科研信息管理系统;

import java.awt.*;

import java.awt.event.*;

import javax.swing.*;

public class LoginWindows extends Frame implements WindowListener,ActionListener

{

 public Label lgLabel; //用户名标签

 public Label pwdLabel; //密码标签

 public TextField lgText; //用户名文本框

 public TextField pwdText; //密码文本框

 public Button lgBt;   //登录按钮

 public Button quitBt;  //退出按钮

  public LoginWindows()

  {

   super();

   this.setSize(400, 300);

   this.setTitle("科研信息管理系统");

   this.setLayout(null);

   lgLabel=new Label();

   lgLabel.setText("登录账号:");

   lgLabel.setSize(60, 30);

   lgLabel.setLocation(70,70);

   pwdLabel=new Label();

   pwdLabel.setText("密  码:");

   pwdLabel.setSize(60,30);

   pwdLabel.setLocation(70, 150);

   lgText=new TextField();

   lgText.setSize(180, 30);

   lgText.setLocation(140, 70);

   pwdText=new TextField();

   pwdText.setSize(180,30);

   pwdText.setLocation(140, 150);

   lgBt=new Button();

   lgBt.setLabel("登录");

   lgBt.setSize(60,30);

   lgBt.setLocation(120, 220);

   quitBt=new Button();

   quitBt.setLabel("退出");

   quitBt.setSize(60,30);

   quitBt.setLocation(220,220);

   quitBt.addActionListener(this);

   lgBt.addActionListener(this);

   this.addWindowListener(this);

   this.add(lgLabel);

   this.add(pwdLabel);

   this.add(lgText);

   this.add(pwdText);

   this.add(lgBt);

   this.add(quitBt);

   this.setVisible(true);

  }

  public static void main(String args[])

  {

   LoginWindows main=new LoginWindows();

  }

 @Override

 public void actionPerformed(ActionEvent e) {

  Button bt=(Button) e.getSource();

  if(bt.getLabel().equals("退出"))

  {

   System.exit(0);

  }

  else {

  if ((lgText.getText().equals(""))||(pwdText.getText().equals("")))

   {

    JOptionPane.showMessageDialog(this,"账号或密码为空");

   }

   else

   {

     if ((lgText.getText().equals("admin"))&&(pwdText.getText().equals("111")))

   //if((lgText.getText().equals(""))||(pwdText.getText().equals("")))

    {

     this.setVisible(false);

    // Sqlwindow sql=new Sqlwindow();

     WindowsView w=new WindowsView();

     w.SciencePro();

    }

    else {

     JOptionPane.showMessageDialog(this, "没有权限");

    }

   }}}

 @Override

 public void windowOpened(WindowEvent e) {

  // TODO Auto-generated method busb

 }

 @Override

 public void windowClosing(WindowEvent e) {

  // TODO Auto-generated method busb

  System.exit(0);

 }

 @Override

 public void windowClosed(WindowEvent e) {

  // TODO Auto-generated method busb

 }

 @Override

 public void windowIconified(WindowEvent e) {

  // TODO Auto-generated method busb

 }

 @Override

 public void windowDeiconified(WindowEvent e) {

  // TODO Auto-generated method busb

 }

 @Override

 public void windowActivated(WindowEvent e) {

  // TODO Auto-generated method busb

 }

 @Override

 public void windowDeactivated(WindowEvent e) {

  // TODO Auto-generated method busb

 }

}

3.2主窗体源码

package 科研信息管理系统;

import javax.swing.*;

import java.awt.*;

import java.awt.event.*;

import javax.swing.event.*;

import javax.swing.tree.*;

public class WindowsView implements TreeSelectionListener,ActionListener //窗口类

{

 JFrame main;

 JPanel leftPa;

 JPanel upPa;

 JPanel downPa;

 ///查询用控件

 JLabel numLa; //通过项目编号查询

 JTextField numTxt;

 JButton numBt;

 JTextField nameTxt; //显示项目名称的文本框

 JTextField peopleTxt; //显示参与人员

 JTextField principalTxt; //显示主要负责人

 JTextField timeStartTxt; //显示开始时间的文本框

 JTextField timeEndTxt; //显示预期结束时间的文本框

 //增加用控件

 JLabel anumLa;

 JLabel anameLa;

 JLabel apeopleLa;

 JLabel aprincipalLa;

 JLabel atimeStartLa;

 JLabel atimeEndLa;

 JTextField anumTxt;

 JTextField anameTxt;

 JTextField apeopleTxt;

 JTextField aprincipalTxt;

 JTextField atimeStartTxt;

 JTextField atimeEndTxt;

 JButton addBt;

 JTable showTable;

 //删除用控件

 JLabel dnumLa;

 JButton dnumBt;

 JTextField dnumTxt;

 //修改用控件

 JLabel alnumLa;

 JTextField allnumTxt;

 JButton alseBt;

 JButton alBt;

 JLabel allnumLa;

 JLabel alnameLa;

 JLabel alpeopleLa;

 JLabel alprincipalLa;

 JLabel altimeStartLa;

 JLabel altimeEndLa;

 JTextField alnumTxt;

 JTextField alnameTxt;

 JTextField alpeopleTxt;

 JTextField alprincipalTxt;

 JTextField altimeStartTxt;

 JTextField altimeEndTxt;

 public void SciencePro()

 {

  main=new JFrame();

  main.setSize(800,800);

  main.setTitle("科研信息管理");

  main.setLayout(null);

  leftPa=new JPanel();

  leftPa.setSize(150, 600);

  leftPa.setLocation(0, 0);

  leftPa.setBackground(Color.white);

  initLeftPanel();

  main.add(leftPa);

  upPa=new JPanel();

  upPa.setSize(650, 400);

  upPa.setLocation(150, 0);

  upPa.setBackground(Color.gray);

  main.add(upPa);

  downPa=new JPanel();

  downPa.setSize(650, 400);

  downPa.setLocation(150, 400);

  downPa.setBackground(Color.orange);

  main.add(downPa);

  main.setVisible(true);

 }

 private void initLeftPanel()

 {

  String[] strs={"查询","增加","删除","修改"};

  JTree tree=new JTree(strs);

  tree.addTreeSelectionListener(this);

  leftPa.add(tree);

 }

 public void valueChanged(TreeSelectionEvent e)

 {

  JTree tree=(JTree)e.getSource();

  DefaultMutableTreeNode selectionNode =(DefaultMutableTreeNode)tree.getLastSelectedPathComponent();

  String str=selectionNode.toString();

  if(str.equals("查询"))

  {

   initUpDownPaWhenSearch();

  }

  if(str.equals("增加"))

  {

   initUpDownPaWhenAdd();

  }

  if(str.equals("删除"))

  {

   initUpDownPaWhenDelete();

  }

  if(str.equals("修改"))

  {

   initUpDownPaWhenAlert();

  }

 }

 private void initUpDownPaWhenSearch()

 {

  //清空上下面板上的控件

  upPa.removeAll();

  downPa.removeAll();

  //动态的加载上面板的控件

  upPa.setLayout(null);

  numLa=new JLabel();

  numLa.setText("请输入项目编号");

  numLa.setLocation(40, 60);

  numLa.setSize(100, 40);

  numTxt=new JTextField();

  numTxt.setLocation(180, 60);

  numTxt.setSize(200, 30);

  numBt=new JButton();

  numBt.setText("查询");

  numBt.addActionListener(this);

  numBt.setLocation(250, 160);

  numBt.setSize(60, 30);

  upPa.add(numLa);

  upPa.add(numTxt);

  upPa.add(numBt);

  upPa.validate();

  upPa.repaint();

  numBt.addActionListener(this);

  //动态的加载下面板的控件

  nameTxt=new JTextField();

  nameTxt.setLocation(80, 50);

  nameTxt.setSize(300, 30);

  peopleTxt=new JTextField();

  peopleTxt.setLocation(80, 100);

  peopleTxt.setSize(300, 30);

  principalTxt=new JTextField();

  principalTxt.setLocation(80, 150);

  principalTxt.setSize(300, 30);

  timeStartTxt=new JTextField();

  timeStartTxt.setLocation(80, 200);

  timeStartTxt.setSize(300, 30);

  timeEndTxt=new JTextField();

  timeEndTxt.setLocation(80,250);

  timeEndTxt.setSize(300, 30);

  downPa.setLayout(null);

  downPa.add(nameTxt);

  downPa.add(peopleTxt);

  downPa.add(principalTxt);

  downPa.add(timeStartTxt);

  downPa.add(timeEndTxt);

  downPa.validate();

  downPa.repaint();

 }

 public void actionPerformed(ActionEvent e)

 {

  JButton bt=(JButton)e.getSource();

  //bt.addActionListener(this);

  if(bt.getText().equals("查询"))

  {

   if(numTxt.getText().equals(""))

   {

    JOptionPane.showMessageDialog(null, "请输入项目编号");

   }

   else

   {

    DealSearch deal=new DealSearch();

    String inf=deal.findProByNum(Integer.parseInt(numTxt.getText().trim()));

    if((inf!=null)&&(!inf.equals("")))

    {

     String[] strs=inf.split(",");

     nameTxt.setText(strs[1]);

     peopleTxt.setText(strs[2]);

     principalTxt.setText(strs[3]);

     timeStartTxt.setText(strs[4]);

     timeEndTxt.setText(strs[5]);

    }

   }

  }

  if(bt.getText().equals("新增"))

  {

   if (anumTxt.getText().equals("")||anameTxt.getText().equals("")||apeopleTxt.getText().equals("")||aprincipalTxt.getText().equals("")||atimeStartTxt.getText().equals("")||atimeEndTxt.getText().equals(""))

   {

    JOptionPane.showMessageDialog(null, "输入中不能有空值！！");

   }

   else

   {

    ScienceProject s=new ScienceProject();

    s.SetNum(Integer.parseInt(anumTxt.getText()));

    s.SetName(anameTxt.getText());

    s.SetPeople(apeopleTxt.getText());

    s.SetLeader(aprincipalTxt.getText());

    s.SetTimeStart(atimeStartTxt.getText());

    s.SetTimeFinish(atimeEndTxt.getText());

    DealAdd deal=new DealAdd();

    deal.add(s);

   }

  }

  if(bt.getText().equals("删除"))

  {

   if(Integer.parseInt(dnumTxt.getText())==0)

   {

    JOptionPane.showMessageDialog(null, "不能删除空的项目编号！！");

   }

   else

   {

    DealDelete deal=new DealDelete();

    deal.delete(Integer.parseInt(dnumTxt.getText().trim()));

   }

  }

  if(bt.getText().equals("提交"))

  {

   if(Integer.parseInt(allnumTxt.getText())==0)

   {

    JOptionPane.showMessageDialog(null, "不能修改空的项目编号！！");

   }

   else

   {

    DealSub deal=new DealSub();

    deal.submit(Integer.parseInt(allnumTxt.getText()));

   }

  }

  if(bt.getText().equals("修改"))

  {

   if (alnameTxt.getText().equals("")||alpeopleTxt.getText().equals("")||alprincipalTxt.getText().equals("")||altimeStartTxt.getText().equals("")||altimeEndTxt.getText().equals(""))

   {

    JOptionPane.showMessageDialog(null, "输入中不能有空值！！");

   }

   else

   {

    ScienceProject s=new ScienceProject();

    s.SetNum(Integer.parseInt(allnumTxt.getText()));

    s.SetName(alnameTxt.getText());

    s.SetPeople(alpeopleTxt.getText());

    s.SetLeader(alprincipalTxt.getText());

    s.SetTimeStart(altimeStartTxt.getText());

    s.SetTimeFinish(altimeEndTxt.getText());

    DealAlter deal=new DealAlter();

    deal.alter(s);

   }

  }

 }

 private void initUpDownPaWhenAdd()

 {

  //清空上下面板上的控件

  upPa.removeAll();

  downPa.removeAll();

  //动态的加载上面板的控件

  upPa.setLayout(null);

  anumLa=new JLabel();

  anumLa.setText("请输入要增加的项目编号");

  anumLa.setLocation(30, 50);

  anumLa.setSize(150, 40);

  anumTxt=new JTextField();

  anumTxt.setLocation(200, 50);

  anumTxt.setSize(250, 30);

  anameLa=new JLabel();

  anameLa.setText("请输入要增加的项目名称");

  anameLa.setLocation(30, 100);

  anameLa.setSize(150, 40);

  anameTxt=new JTextField();

  anameTxt.setLocation(200, 100);

  anameTxt.setSize(250, 30);

  apeopleLa=new JLabel();

  apeopleLa.setText("请输入项目参与人员");

  apeopleLa.setLocation(30, 150);

  apeopleLa.setSize(150, 40);

  apeopleTxt=new JTextField();

  apeopleTxt.setLocation(200, 150);

  apeopleTxt.setSize(250, 30);

  aprincipalLa=new JLabel();

  aprincipalLa.setText("请输入项目负责人");

  aprincipalLa.setLocation(30, 200);

  aprincipalLa.setSize(150, 40);

  aprincipalTxt=new JTextField();

  aprincipalTxt.setLocation(200, 200);

  aprincipalTxt.setSize(250, 30);

  atimeStartLa=new JLabel();

  atimeStartLa.setText("请输入项目开始时间");

  atimeStartLa.setLocation(30, 250);

  atimeStartLa.setSize(150, 40);

  atimeStartTxt=new JTextField();

  atimeStartTxt.setLocation(200, 250);

  atimeStartTxt.setSize(250, 30);

  atimeEndLa=new JLabel();

  atimeEndLa.setText("请输入项目结束时间");

  atimeEndLa.setLocation(30, 300);

  atimeEndLa.setSize(150, 40);

  atimeEndTxt=new JTextField();

  atimeEndTxt.setLocation(200, 300);

  atimeEndTxt.setSize(250, 30);

  addBt=new JButton();

  addBt.setText("新增");

  addBt.addActionListener(this);

  //addBt.addMouseListener(this);

  addBt.setLocation(250, 340);

  addBt.setSize(60, 30);

  upPa.add(addBt);

  upPa.add(anumLa);

  upPa.add(anameLa);

  upPa.add(apeopleLa);

  upPa.add(aprincipalLa);

  upPa.add(atimeStartLa);

  upPa.add(atimeEndLa);

  upPa.add(anameTxt);

  upPa.add(anumTxt);

  upPa.add(apeopleTxt);

  upPa.add(aprincipalTxt);

  upPa.add(atimeStartTxt);

  upPa.add(atimeEndTxt);

  upPa.validate();

  upPa.repaint();

  downPa.validate();

  downPa.repaint();

 }

 private void initUpDownPaWhenDelete()

 {

  //清空上下面板上的控件

  upPa.removeAll();

  downPa.removeAll();

  //动态的加载上面板的控件

  upPa.setLayout(null);

  numLa=new JLabel();

  numLa.setText("请输入要删除的项目编号");

  numLa.setLocation(40, 60);

  numLa.setSize(150, 40);

  dnumTxt=new JTextField();

  dnumTxt.setLocation(200, 60);

  dnumTxt.setSize(250, 30);

  dnumBt=new JButton();

  dnumBt.setText("删除");

  dnumBt.addActionListener(this);

  dnumBt.setLocation(270, 170);

  dnumBt.setSize(60, 30);

  upPa.add(numLa);

  upPa.add(dnumTxt);

  upPa.add(dnumBt);

  upPa.validate();

  upPa.repaint();

  downPa.validate();

  downPa.repaint();

 }

 private void initUpDownPaWhenAlert()

 {

  //清空上下面板上的控件

  upPa.removeAll();

  downPa.removeAll();

  //动态的加载上面板的控件

  upPa.setLayout(null);

  alnumLa=new JLabel();

  alnumLa.setText("请输入要修改的项目编号");

  alnumLa.setLocation(40, 60);

  alnumLa.setSize(150, 40);

  alseBt=new JButton();

  alseBt.setText("提交");

  alseBt.addActionListener(this);

  alseBt.setLocation(270, 170);

  alseBt.setSize(60, 30);

  allnumTxt=new JTextField();

  allnumTxt.setLocation(200, 60);

  allnumTxt.setSize(200, 30);

  upPa.add(alnumLa);

  upPa.add(alseBt);

  upPa.add(allnumTxt);

  upPa.validate();

  upPa.repaint();

  alBt=new JButton();

  alBt.setText("修改");

  alBt.addActionListener(this);

  alBt.setLocation(450, 170);

  alBt.setSize(60, 30);

 /*  allnumLa=new JLabel();

  allnumLa.setText("请输入修改后的项目编号");

  allnumLa.setLocation(30, 00);

  allnumLa.setSize(150, 40);

  alnumTxt=new JTextField();

  alnumTxt.setLocation(180, 00);

  alnumTxt.setSize(250, 30);*/

  alnameLa=new JLabel();

  alnameLa.setText("请输入修改后项目名称");

  alnameLa.setLocation(30, 50);

  alnameLa.setSize(150, 40);

  alnameTxt=new JTextField();

  alnameTxt.setLocation(180, 50);

  alnameTxt.setSize(250, 30);

  alpeopleLa=new JLabel();

  alpeopleLa.setText("请重设参与人员");

  alpeopleLa.setLocation(30, 100);

  alpeopleLa.setSize(150, 40);

  alpeopleTxt=new JTextField();

  alpeopleTxt.setLocation(180, 100);

  alpeopleTxt.setSize(250, 30);

  alprincipalLa=new JLabel();

  alprincipalLa.setText("请重设项目负责人");

  alprincipalLa.setLocation(30, 150);

  alprincipalLa.setSize(150, 40);

  alprincipalTxt=new JTextField();

  alprincipalTxt.setLocation(180, 150);

  alprincipalTxt.setSize(250, 30);

  altimeStartLa=new JLabel();

  altimeStartLa.setText("请重设项目开始时间");

  altimeStartLa.setLocation(30, 200);

  altimeStartLa.setSize(150, 40);

  altimeStartTxt=new JTextField();

  altimeStartTxt.setLocation(180, 200);

  altimeStartTxt.setSize(250, 30);

  altimeEndLa=new JLabel();

  altimeEndLa.setText("请重设项目结束时间");

  altimeEndLa.setLocation(30, 250);

  altimeEndLa.setSize(150, 40);

  altimeEndTxt=new JTextField();

  altimeEndTxt.setLocation(180, 250);

  altimeEndTxt.setSize(250, 30);

  downPa.add(alBt);

  //downPa.add(allnumLa);

  downPa.add(alnameLa);

  downPa.add(alpeopleLa);

  downPa.add(alprincipalLa);

  downPa.add(altimeStartLa);

  downPa.add(altimeEndLa);

  downPa.add(alnameTxt);

  //downPa.add(alnumTxt);

  downPa.add(alpeopleTxt);

  downPa.add(alprincipalTxt);

  downPa.add(altimeStartTxt);

  downPa.add(altimeEndTxt);

  downPa.setLayout(null);

  downPa.validate();

  downPa.repaint();

 }

}

3.3 组织SQL语句，链接数据库部分

package 科研信息管理系统;

import java.sql.*;

import java.util.Scanner;

public class Sql {

 public void AddScienceProject(ScienceProject scienceProject)

 {

  try

  {

   Class.forName("oracle.jdbc.driver.OracleDriver").newInstance();

   String conStr="jdbc:oracle:thin:@localhost:1521:XE";

   Connection con=DriverManager.getConnection(conStr,"system","1");

   StringBuffer sql=new StringBuffer("insert into science values("+scienceProject.GetNum()+",'"+scienceProject.GetName()+"','"+scienceProject.GetPeople()+"','"+scienceProject.GetLeader()+"','"+scienceProject.GetTimeStart()+"','"+scienceProject.GetTimeFinish()+"')");

   Statement st=con.createStatement();

   st.execute(sql.toString());

   st.close();

   con.close();

  }

  catch (Exception e)

  {

  // TODO: handle exception

  System.out.println(e.toString());

  }

 }

 public void DelScienceProject(ScienceProject scienceProject)

 {

  try

  {

  Class.forName("oracle.jdbc.driver.OracleDriver").newInstance();

  String conStr="jdbc:oracle:thin:@localhost:1521:XE";

  Connection con=DriverManager.getConnection(conStr,"system","1");

  StringBuffer sql=new StringBuffer("delete from science where num="+scienceProject.GetNum()+"");

  Statement st=con.createStatement();

  st.execute(sql.toString());

  st.close();

  con.close();

  }

  catch (Exception e)

  {

  // TODO: handle exception

  System.out.println(e.toString());

  }

 }

 public void UpdScienceProject(ScienceProject scienceProject)

 {

  try

  {

  Class.forName("oracle.jdbc.driver.OracleDriver").newInstance();

  String conStr="jdbc:oracle:thin:@localhost:1521:XE";

  Connection con=DriverManager.getConnection(conStr,"system","1");

  StringBuffer sql =new StringBuffer("update science set name='"+scienceProject.GetName()+"',workpeople='"+scienceProject.GetPeople()+"',manager='"+scienceProject.GetLeader()+"',timestart='"+scienceProject.GetTimeStart()+"',timeend='"+scienceProject.GetTimeFinish()+"' where num="+scienceProject.GetNum()+"");

  Statement st=con.createStatement();

  st.execute(sql.toString());

  st.close();

  con.close();

  }

  catch (Exception e)

  {

  // TODO: handle exception

   System.out.println("修改异常");

  System.out.println(e.toString());

  }

 }

 public ScienceProject Findbynum(int num)

 {

  ScienceProject scienceProject=new ScienceProject();

  try

  {

   Class.forName("oracle.jdbc.driver.OracleDriver").newInstance();

   String conStr="jdbc:oracle:thin:@localhost:1521:XE";

   Connection con=DriverManager.getConnection(conStr,"system","1");

   StringBuffer sql=new StringBuffer("select * from science where num="+num+"");

   Statement st=con.createStatement();

   ResultSet rs=st.executeQuery(sql.toString());

   while(rs.next())

   {

    scienceProject.SetNum(rs.getInt(1));

    scienceProject.SetName(rs.getString(2));

    scienceProject.SetPeople(rs.getString(3));

    scienceProject.SetLeader(rs.getString(4));

    scienceProject.SetTimeStart(rs.getString(5));

    scienceProject.SetTimeFinish(rs.getString(6));

   }

   st.close();

   con.close();

  }

  catch (Exception e) {

  // TODO: handle exception

  System.out.println(e.toString());

  }

 return scienceProject;

 }

 public ScienceProject Look()

 {

  ScienceProject scienceProject=new ScienceProject();

  try

   {

   Class.forName("oracle.jdbc.driver.OracleDriver").newInstance();

   String conStr="jdbc:oracle:thin:@localhost:1521:XE";

   Connection con=DriverManager.getConnection(conStr,"system","1");

   StringBuffer sql=new StringBuffer("select *from science");

   Statement st=con.createStatement();

   ResultSet rs=st.executeQuery(sql.toString());

   while(rs.next())

   {

    scienceProject.SetNum(rs.getInt(1));

    scienceProject.SetName(rs.getString(2));

    scienceProject.SetPeople(rs.getString(3));

    scienceProject.SetLeader(rs.getString(4));

    scienceProject.SetTimeStart(rs.getString(5));

    scienceProject.SetTimeFinish(rs.getString(6));

   }

   st.close();

   con.close();

 }

  catch (Exception ex)

  {

  // TODO: handle exception

  System.out.println(ex.toString());

  }

 return scienceProject;

 }

 public static void main(String args[])

 {

 }

}

3.4 增删查改对应处理的源码

//处理增加

package 科研信息管理系统;

import javax.swing.JOptionPane;

public class DealAdd

{

 public DealAdd()

 {}

 public void add(ScienceProject s)

 {

  Sql sql=new Sql();

  if(sql.Findbynum(s.GetNum()).GetNum()!=0)

  {

   JOptionPane.showMessageDialog(null, "该项目已存在，请重新输入！");

  }

  else

  {

   sql.AddScienceProject(s);

   JOptionPane.showMessageDialog(null,"增加成功");

  }

 }

}

由设计部分可以看到，删除时需要先提交项目编号，所以，需要处理提交事件

//处理提交

package 科研信息管理系统;

import javax.swing.JOptionPane;

public class DealSub

{

 DealSub()

 {}

 public void submit(int num)

 {

  Sql sql =new Sql();

  if(sql.Findbynum(num).GetNum()==0)

  {

   JOptionPane.showMessageDialog(null, "不存在该项目");

  }

  else

  {

   JOptionPane.showMessageDialog(null, "请在下方填写修改后的项目信息");

  }

 }

}

//处理删除

package 科研信息管理系统;

import javax.swing.JOptionPane;

public class DealDelete

{

 public DealDelete()

 {}

 public void delete(int num)

 {

  ScienceProject s=new ScienceProject();

  Sql sql=new Sql();

  if(sql.Findbynum(num).GetNum()==0)

  {

   JOptionPane.showMessageDialog(null, "不存在该项目~");

  }

  else

  {

   s=sql.Findbynum(num);

   sql.DelScienceProject(s);

   JOptionPane.showMessageDialog(null, "删除成功~");

  }

 }

}

//处理修改

package 科研信息管理系统;

import javax.swing.JOptionPane;

public class DealAlter

{

 public DealAlter()

 {}

 public void alter(ScienceProject s)

 {

  Sql sql=new Sql();

  sql.UpdScienceProject(s);

  JOptionPane.showMessageDialog(null,"修改成功");

 }

}

//处理查询

package 科研信息管理系统;

public class DealSearch //处理查询事件

{

 public DealSearch()

 {}

 public String findProByNum(int num)//通过项目编号查询

 {

  String result="";

  ScienceProject s=new ScienceProject();

  Sql sql=new Sql();

  s=sql.Findbynum(num);

  result=s.GetNum()+","+s.GetName()+","+s.GetPeople()+","+s.GetLeader()+","+s.GetTimeStart()+","+s.GetTimeFinish();

  return result;

 }

}

3.5 主函数调用登录窗口

package 科研信息管理系统;

public class Test {

 public static void main(String[] args)

 {

  LoginWindows v=new LoginWindows();

 }

}

四、总结

还是有一些的缺陷存在的，由于对科研项目的不熟悉，有些属性设计得不合理，还有很多没有考虑到的地方，另外对GUI的不熟悉也限制了我们在窗口上的设计。还需要在项目属性及窗口等方面进行修改。

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持我。

巴特西

java实现科研信息管理系统

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