Eclipse+Java+Swing实现学生成绩管理系统的实例代码

一、系统介绍

本系统实现了用户登录，实现了对学生成绩的增删改查，实现了用户修改密码功能，采用md5加密算法，数据库使用mysql8.0.13，界面良好。

二、系统展示

1.登录页

2.主页面

3.查询学生成绩

4.修改学生成绩

5.添加学生成绩

6.修改系统密码

三、系统实现 student.java

package com.sjsq.model;

import java.util.arraylist;
import java.util.list;

/**
 * 学生实体类
 * @author shuijianshiqing
 *
 */

public class student {

	// 学号
	private string sid;
	// 姓名
	private string sname;
	// 性别
	private string ssex;
	// 学院
	private string scollege;
	private string sc;
	private string smath;
	private string senglish;
	private string schinese;
	private string sjava;

	public student() {
		super();
	}

	public student(string sid, string sname, string ssex, string scollege, string sc, string smath,
			string senglish, string schinese, string sjava) {
		super();
		this.sid = sid;
		this.sname = sname;
		this.ssex = ssex;
		this.scollege = scollege;
		this.sc = sc;
		this.smath = smath;
		this.senglish = senglish;
		this.schinese = schinese;
		this.sjava = sjava;
	}

	public static list<student> students=new arraylist<student>();
	
	public string getsid() {
		return sid;
	}

	public void setsid(string sid) {
		this.sid = sid;
	}

	public string getsname() {
		return sname;
	}

	public void setsname(string sname) {
		this.sname = sname;
	}

	public string getssex() {
		return ssex;
	}

	public void setssex(string ssex) {
		this.ssex = ssex;
	}

	public string getscollege() {
		return scollege;
	}

	public void setscollege(string scollege) {
		this.scollege = scollege;
	}

	public string getsc() {
		return sc;
	}

	public void setsc(string sc) {
		this.sc = sc;
	}

	public string getsmath() {
		return smath;
	}

	public void setsmath(string smath) {
		this.smath = smath;
	}

	public string getsenglish() {
		return senglish;
	}

	public void setsenglish(string senglish) {
		this.senglish = senglish;
	}

	public string getschinese() {
		return schinese;
	}

	public void setschinese(string schinese) {
		this.schinese = schinese;
	}

	public string getsjava() {
		return sjava;
	}

	public void setsjava(string sjava) {
		this.sjava = sjava;
	}

	@override
	public string tostring() {
		return "student [sid=" + sid + ", sname=" + sname + ", ssex=" + ssex + ", scollege=" + scollege + ", sc="
				+ sc + ", smath=" + smath + ", senglish=" + senglish + ", schinese=" + schinese + ", sjava="
				+ sjava + "]";
	}	

}

studentdao.java

package com.sjsq.dao;

import java.io.fileinputstream;
import java.io.fileoutputstream;
import java.io.ioexception;
import java.io.inputstream;
import java.io.outputstream;
import java.sql.resultset;
import java.sql.sqlexception;
import java.util.arraylist;
import java.util.iterator;
import java.util.list;
import com.sjsq.model.student;
import com.sjsq.util.dbutil;

public class studentdao {
	public static int progress;

	// private final string file_path="d:\\student.xls";

	public static studentdao getinstance() {
		studentdao studentdao;
		return studentdao = new studentdao();
	}

	// 查询所有学生的信息
	public resultset queryall() {
		resultset rs = null;
		string sql = "select * from student";
		system.out.println("------查询所有学生信息------");
		system.out.println("sql语句:" + sql);
		dbutil db = new dbutil();
		try {
			rs = db.executequery(sql);
		} catch (sqlexception e) {
			e.printstacktrace();
		}
		return rs;
	}

	// 查询所有学生信息，并且返回list
	public list<student> queryallstudent() {
		list<student> liststudent = new arraylist<student>();
		string sql = "select * from student";
		system.out.println("------查询所有学生信息------");
		system.out.println("sql语句:" + sql);
		dbutil db = new dbutil();
		resultset rs = null;
		try {
			rs = db.executequery(sql);
			while (rs.next()) {
				student studenttmp = new student();
				studenttmp.setsid(rs.getstring("sid"));
				studenttmp.setsname(rs.getstring("sname"));
				studenttmp.setssex(rs.getstring("ssex"));
				studenttmp.setscollege(rs.getstring("scollege"));
				studenttmp.setsc(rs.getstring("sc"));
				studenttmp.setsmath(rs.getstring("smath"));
				studenttmp.setsenglish(rs.getstring("senglish"));
				studenttmp.setschinese(rs.getstring("schinese"));
				studenttmp.setsjava(rs.getstring("sjava"));
				liststudent.add(studenttmp);
			}
		} catch (sqlexception e) {

			e.printstacktrace();
		} finally {
			try {
				if (rs != null) {
					rs.close();
				}
			} catch (sqlexception e) {

				e.printstacktrace();
			}
			db.close();
		}
		return liststudent;
	}


	public static int getprogress() {
		return progress;
	}
	
	// 按照条件查询
	public resultset querybycondition(string[] data) {
		resultset rs = null;
		string sql = "select * from student where 1=1";
		int i = 0;
		// 学号
		if (!(data[0].equals(""))) {
			sql += " and sid='" + data[0] + "' ";
		}
		// 姓名
		if (!(data[1].equals(""))) {
			sql += " and sname='" + data[1] + "' ";
		}
		// 省份
		if (!(data[2].equals(""))) {
			sql += " and senglish='" + data[2] + "' ";
		}
		// 性别
		if (!(data[3].equals(""))) {
			sql += " and ssex='" + data[3] + "' ";
		}
		
		system.out.println("------查询所有学生信息------");
		system.out.println("sql语句:" + sql);

		dbutil db = new dbutil();
		try {
			rs = db.executequery(sql);
		} catch (sqlexception e) {

			e.printstacktrace();
		}

		return rs;
	}	
	
	// 插入学生信息，并且返回插入结果
	public boolean insertstudentinformation(student student) {
		dbutil dbutil = new dbutil();
		// 通过student对象设置sid的值
		string sid = student.getsid();
		string sname = student.getsname();
		string ssex = student.getssex();
		string scollege = student.getscollege();
		string sc = student.getsc();
		string smath = student.getsmath();
		string senglish = student.getsenglish();
		string schinese = student.getschinese();
		string sjava = student.getsjava();

		string sql = "insert into student(sid,sname,ssex,scollege,sc,smath,senglish,schinese,sjava)" + 
		"values('" + sid + "','" + sname + "','" + ssex + "','" + scollege+ "','" + sc+ "','" 
				+ smath + "','" + senglish + "','" + schinese + "','" + sjava + "')";
		
		system.out.println("------插入学生信息------");
		system.out.println("sql语句:" + sql);
		
		// 向数据库插入数据语句
		// 定义一个boolean型变量，用于判断插入数据是否成功
		boolean flag = false;
		try {
			// 更新数据库信息
			flag = dbutil.executeupdate(sql);
		} catch (sqlexception e) {
			e.printstacktrace();
		}
		dbutil.close();
		// 返回执行结果
		return flag;

	}

	// 统计同一学号有多少人
	public int queryforsidinformation(string sid) {
		dbutil db = new dbutil();
		// 通过sid查询数据库中是否有相同sid数据
		string sql = "select * from student where sid=" + sid;
		system.out.println("------验证学生学号信息------");
		system.out.println("sql语句:" + sql);
		resultset rs = null;
		int count = 0;
		try {
			// 更新数据库保存到结果集里
			rs = (resultset) db.executequery(sql);
			// 找到相同的count++
			if (rs.next()) {
				count++;
			}
		} catch (sqlexception e) {
			e.printstacktrace();
		}
		// 关闭数据库连接
		db.close();
		// 返回count
		return count;
	}

	// 更新学生信息，这里学号不能更新
	public boolean updatestudentinformation(student student) {
		dbutil dbutil = new dbutil();
		// scollege,sc,smath,senglish,schinese,sjava
		string sql = "update student set sname=" + "'" + student.getsname() + "'" + " ," 
				+ " ssex=" + "'" + student.getssex() + "'" + " ,"
				+ " scollege=" + "'" + student.getscollege() + "' " + " ,"
				+ " sc=" + "'" + student.getsc() + "' " + " ,"
				+ " smath=" + "'" + student.getsmath() + "' " + " ,"
				+ " senglish=" + "'" + student.getsenglish() + "'" + "," 
				+ " schinese=" + "'" + student.getschinese() + "'" + " ," 
				+ " sjava=" + "'" + student.getsjava()+ "'" 
				+ " where" + " sid=" + "'"+ student.getsid() + "'";
		system.out.println("------更新学生信息------");
		system.out.println("sql语句:" + sql);
		
		boolean flag = false;
		try {
			flag = dbutil.executeupdate(sql);
		} catch (sqlexception e) {
			e.printstacktrace();
		}
		return flag;
	}

	// 删除学生信息
	public boolean deletestudentinfobysid(string sid) {
		boolean flag = false;
		string sql = "delete from student where sid=" + "'" + sid + "'";
		
		system.out.println("------删除学生信息------");
		system.out.println("sql语句:" + sql);
		
		dbutil dbutil = new dbutil();
		try {
			flag = dbutil.executeupdate(sql);
		} catch (sqlexception e) {
			e.printstacktrace();
		}
		return flag;
	}
}

loginframe.java

package com.sjsq.view;

import org.jb2011.lnf.beautyeye.ch3_button.bebuttonui;
import java.awt.color;
import java.awt.font;
import java.awt.graphics;
import java.awt.image;
import java.awt.rectangle;
import java.awt.toolkit;
import java.awt.event.actionevent;
import java.awt.event.actionlistener;
import java.awt.event.keyevent;
import java.awt.event.keylistener;

import javax.swing.imageicon;
import javax.swing.jbutton;
import javax.swing.jframe;
import javax.swing.jlabel;
import javax.swing.joptionpane;
import javax.swing.jpanel;
import javax.swing.jpasswordfield;
import javax.swing.jtextfield;
import javax.swing.timer;
import javax.swing.uimanager;

import com.sjsq.model.user;
import com.sjsq.util.md5util;
import com.sjsq.dao.userdao;

public class loginframe extends jframe implements actionlistener {
	public static string uname = null;
	public static string pwd = null;
	string username, password, login, quit;

	// 登录标签
	private jlabel loginjlabel;
	private jpanel jcontentpane = null;
	private jbutton jbuttonlogin = null;
	private jbutton jbuttonexit = null;
	private jtextfield jtextfieldusername = null;
	private jtextfield jtextfieldpassword = null;
	// 登录用户名
	static int storeuserid;
	// 图片
	public jlabel jlabel_image = null;
	// 登录用户名
	public static string storeuserame = null;
	// 登录密码
	public static string storeuserpassword = null;
	// 重新登陆标记
	static boolean reload = true;
	private jlabel jlabelusername = null;
	private jlabel jlabelpassword = null;

	int index;
	
	public loginframe() {
			// 设置背景
			setforeground(new color(255, 255, 255));
			this.setresizable(false);
			this.setsize(800, 500);
			this.settitle("学生成绩管理系统");
			
			this.setlocationrelativeto(null);
			try {
				uimanager.setlookandfeel("com.sun.java.swing.plaf.windows.windowslookandfeel");// 使用windows外观
			} catch (exception e) {
				e.printstacktrace();
			}
			
			loginjlabel = new jlabel("学生成绩管理系统");
			font font = new font("微软雅黑",font.bold,40);
			loginjlabel.setfont(font);
			loginjlabel.setbounds(220,100,650, 50);
			loginjlabel.setforeground(color.dark_gray);
			getcontentpane().add(loginjlabel);

			font font2 = new font("微软雅黑",font.bold,15);
			jlabelpassword = new jlabel();
			jlabelpassword.setfont(font2);
			jlabelpassword.setbounds(new rectangle(300, 250, 71, 29));
			jlabelpassword.settext("用户名：");
			jlabelusername = new jlabel();
			jlabelusername.setbounds(new rectangle(300, 300, 71, 29));
			jlabelusername.setfont(font2);
			jlabelusername.settext("密码：");
			
			// 账号输入框
			jtextfieldusername = new jtextfield(20);
			jtextfieldusername.setbounds(new rectangle(360, 250, 154, 33));
			// 密码输入框
			jtextfieldpassword = new jpasswordfield();
			jtextfieldpassword.setbounds(new rectangle(360, 300, 154, 33));
			
			// 登录
			jbuttonlogin = new jbutton();
			jbuttonlogin.setbounds(new rectangle(320, 380, 78, 26));
			jbuttonlogin.settext("登录");
			jbuttonlogin.setui(new bebuttonui()
					.setnormalcolor(bebuttonui.normalcolor.green));
			// 回车登录
			getrootpane().setdefaultbutton(jbuttonlogin);

			// 退出
			jbuttonexit = new jbutton();
			jbuttonexit.setui(new bebuttonui()
					.setnormalcolor(bebuttonui.normalcolor.lightblue));
			jbuttonexit.setbounds(new rectangle(420, 380, 78, 26));
			jbuttonexit.settext("退出");
			
			// 包含所有的元素
			jcontentpane = new jpanel();
			jcontentpane.setlayout(null);
			jcontentpane.add(jlabelusername, null);
			jcontentpane.add(jlabelpassword, null);
			jcontentpane.add(jbuttonlogin, null);
			jcontentpane.add(jbuttonexit, null);
			jcontentpane.add(jtextfieldusername, null);
			jcontentpane.add(jtextfieldpassword, null);
			getcontentpane().add(jcontentpane);
			
			jtextfieldusername.addkeylistener(new keylistener() {
				@override
				public void keypressed(keyevent e) {

				}
				@override
				public void keyreleased(keyevent e) {

				}
				@override
				public void keytyped(keyevent e) {
					if(e.getkeychar() == keyevent.vk_enter){
						jtextfieldpassword.requestfocus();
					}
				}
			});

			jtextfieldpassword.addkeylistener(new keylistener() {
				@override
				public void keytyped(keyevent e) {

				}
				@override
				public void keyreleased(keyevent e) {

				}
				@override
				public void keypressed(keyevent e) {
					if(e.getkeychar() == keyevent.vk_enter){
						username = jtextfieldusername.gettext();
						password = md5util.string2md5(jtextfieldpassword.gettext());

						user user = new user();
						user.setusername(username);
						user.setpassword(password);
						string s=user.getusername();
						string p=jtextfieldpassword.gettext();
						userdao userdao = new userdao();
						int choice = 0;
						if(!userdao.checkuser(user)) {
							joptionpane.showmessagedialog(null, "用户名和密码错误","消息提示",joptionpane.warning_message);
						}else {
							setvisible(false);
							mainmenuframe mm = new mainmenuframe();
							uname = s;
							pwd=p;
						}
					}
				}
			});

			this.setdefaultcloseoperation(exit_on_close);
			this.setvisible(true);

			// 添加监控
			jtextfieldusername.addactionlistener(this);
			jtextfieldpassword.addactionlistener(this);
			jbuttonlogin.addactionlistener(this);
			jbuttonexit.addactionlistener(this);
		}


	@override
	public void actionperformed(actionevent e) {

		// 获取账号和密码
		username = jtextfieldusername.gettext();
		password = md5util.string2md5(jtextfieldpassword.gettext());

		user user = new user();
		user.setusername(username);
		user.setpassword(password);
		string s = user.getusername();
		string p = jtextfieldpassword.gettext();
		userdao userdao = new userdao();
		int choice = 0;

		if (e.getsource() == jbuttonlogin) {
			if (!userdao.checkuser(user)) {
				joptionpane.showmessagedialog(null, "用户名和密码错误", "消息提示", joptionpane.warning_message);
			} else {
				setvisible(false);
				mainmenuframe mm = new mainmenuframe();
				uname = s;
				pwd = p;
			}
		} else if (e.getsource() == jbuttonexit) {
			system.exit(0);
		}
	}
	
	// 测试
	public static void main(string[] args) {
		new loginframe();
	}
}

mainmenuframe.java

package com.sjsq.view;

import java.awt.font;
import java.awt.rectangle;
import java.awt.event.actionevent;
import java.awt.event.actionlistener;
import java.awt.event.windowadapter;
import java.awt.event.windowevent;

import javax.swing.imageicon;
import javax.swing.jbutton;
import javax.swing.jframe;
import javax.swing.jmenubar;
import javax.swing.jmenuitem;
import javax.swing.jpanel;
import javax.swing.jscrollpane;
import javax.swing.jtextarea;

import org.jb2011.lnf.beautyeye.ch3_button.bebuttonui;

/*
 * 登陆成功后主界面
 */
public class mainmenuframe extends jframe implements actionlistener {
	private jframe mainmenu;
	private jtextarea text;
	// 标题栏（关于）
	private jmenubar menubar1;
	private jmenuitem aboutsystem;

	public mainmenuframe() {

		mainmenu();
	}

	public void mainmenu() {
		mainmenu = new jframe("极客大学学生管理系统");
		setlocationrelativeto(null);// 将容器显示在屏幕*
		mainmenu.setsize(850, 650);

		mainmenu.getcontentpane().add(new jscrollpane(text));

		jpanel jcontentpane = new jpanel();
		jcontentpane.setlayout(null);

		// 查询学生按钮
		jbutton jbuttonselect = new jbutton();
		jbuttonselect.setbounds(new rectangle(320, 100, 100, 52));
		jbuttonselect.settext("查询学生");
		jbuttonselect.setui(new bebuttonui().setnormalcolor(bebuttonui.normalcolor.lightblue));
		getrootpane().setdefaultbutton(jbuttonselect);// 回车登录

		// 添加学生按钮
		jbutton jbuttonadd = new jbutton();
		jbuttonadd.setui(new bebuttonui().setnormalcolor(bebuttonui.normalcolor.lightblue));
		jbuttonadd.setbounds(new rectangle(320, 200, 100, 52));
		jbuttonadd.settext("添加学生");

		// 修改密码按钮
		jbutton jbuttonalterpwd = new jbutton();
		jbuttonalterpwd.setui(new bebuttonui().setnormalcolor(bebuttonui.normalcolor.lightblue));
		jbuttonalterpwd.setbounds(new rectangle(320, 300, 100, 52));
		jbuttonalterpwd.settext("密码修改");

		// 退出系统按钮
		jbutton jbuttonexit = new jbutton();
		jbuttonexit.setui(new bebuttonui().setnormalcolor(bebuttonui.normalcolor.lightblue));
		jbuttonexit.setbounds(new rectangle(320, 400, 100, 52));
		jbuttonexit.settext("退出系统");

		jcontentpane.add(jbuttonselect, null);
		jcontentpane.add(jbuttonadd, null);
		jcontentpane.add(jbuttonalterpwd, null);
		jcontentpane.add(jbuttonexit, null);

		// 添加label到frame
		mainmenu.getcontentpane().add(jcontentpane);
		// 设置字体
		font font = new font("微软雅黑", font.bold, 16);
		// 标题栏
		menubar1 = new jmenubar();

		// aboutsystem = new jmenuitem("关于本系统",new
		// imageicon("src/images/icons/about.png"));
		aboutsystem = new jmenuitem("关于本系统");
		aboutsystem.setmnemonic('h');

		menubar1.add(aboutsystem);

		// 查询学生
		jbuttonselect.addactionlistener(new actionlistener() {

			@override
			public void actionperformed(actionevent e) {
				system.out.println("------查询学生-----");
				querystudentinfo querystudentinfo = new querystudentinfo();
			}
		});

		// 添加学生
		jbuttonadd.addactionlistener(new actionlistener() {

			@override
			public void actionperformed(actionevent e) {
				system.out.println("------添加学生-----");
				addstudentinfo addstudentinfo = new addstudentinfo();
			}
		});

		// 修改密码
		jbuttonalterpwd.addactionlistener(new actionlistener() {

			@override
			public void actionperformed(actionevent e) {
				system.out.println("------修改密码-----");
				modifypasswordinfo modifypasswordinfo = new modifypasswordinfo();
			}
		});

		// 退出系统
		jbuttonexit.addactionlistener(new actionlistener() {

			@override
			public void actionperformed(actionevent e) {
				system.out.println("------退出系统-----");
				system.exit(1);
			}
		});

		// 关于系统
		aboutsystem.addactionlistener(new actionlistener() {

			@override
			public void actionperformed(actionevent e) {
				system.out.println("------关于系统------");
				aboutsystem aboutsystem = new aboutsystem();
			}
		});

		// 关闭窗口监控
		mainmenu.addwindowlistener(new windowadapter() {
			public void windowclosing(windowevent arg0) {
				system.exit(1);
			}
		});

		mainmenu.setjmenubar(menubar1);
		mainmenu.setvisible(true);
		// mainmenu.setlocation(250, 50);
		mainmenu.setlocationrelativeto(null);
		aboutsystem.addactionlistener(this);
	}

	// 主函数测试
	public static void main(string[] args) {
		new mainmenuframe();

	}

	@override
	public void actionperformed(actionevent arg0) {
	}

}

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