JDBC+GUI实现简单学生管理系统
刚学完jdbc不久,做了一个简单的学生管理系统,可能还有不完善的地方,望各路大神见谅。废话不多说,我先贴个图让大家让大家瞅瞅,觉得是你想要的再看下去吧。
我是以管理者的身份去做的,适合初学者去学习。
在做之前,先捋一遍思路,简单来说分为三大步。
一、在数据库里建student表存放学生信息
二、用jdbc来连接、操作数据库
三、展示student数据,实现增删改查功能。
思路是非常简单的,但是要实现还是有很多细节需要注意,下面我就贴上我的代码,结合着代码给大家一步步的分析说明。
实现:
一、在数据库建表:这个不用细说,直接贴图。
二、用jdbc连接数据库:这一块对于刚刚学jdbc的同学来说可能比较绕,所以我把这一块又分成了四部分(最后的db.properties跟com.student.db一起的),我会逐个说明。看图。
(1)com.student.db包里有两个类,一个是dbhelper 一个是dbmanager,这俩类是用jdbc连接数据库的,固定写法。
dbmanager类
package com.student.db; import java.sql.connection; import java.sql.preparedstatement; import java.sql.resultset; import java.sql.sqlexception; import java.util.arraylist; import java.util.list; import com.student.mapper.imapper; public class dbmanager { //这里把jdbc连接数据库的步骤(找驱动,建连接,建通道,执行sql)封装在dbhelper类里面,在dbmanager里用getconnection()调用。这样写的目的是方便 public connection getconnection(){ try { return dbhelper.getconnection();//得到dbhelper类里面写好的连接 } catch (classnotfoundexception e) { e.printstacktrace(); } catch (sqlexception e) { e.printstacktrace(); } return null; } //增删改结果集。因为sql语句是变化的,所以设为参数比较方便。params是占位符的,没学的可以忽略。 public int executeupdate(string sql,object[] params){ connection conn=null; preparedstatement pst=null; try { conn=getconnection();//连接 pst=conn.preparestatement(sql);//通道 if(params != null){//占位符的应用。 for(int i=0;i<params.length;i++){ pst.setobject(i+1,params[i]);//往通道里放数据,占位符下标从1开始。 } } return pst.executeupdate(); } catch (sqlexception e) { e.printstacktrace(); } return -1; } //查询结果集。比增删改要复杂一些,慢慢看。 //这里的imapper是将所有可能的用到的类都放进去,方便以后继承使用。(现在我们写的是student信息,以后可能会有teacher信息,class信息等等) //用接口是因为接口多继承,方便维护升级 public list executequery(string sql,imapper mapper,object []params){ connection conn=null; preparedstatement pst=null; resultset rst=null;//查询结果集 list list=new arraylist();//用一个集合存放student信息 try { conn=getconnection(); pst=conn.preparestatement(sql); if(params != null){ for(int i=0;i<params.length;i++){ pst.setobject(i+1,params[i]); } } rst=pst.executequery();//把通道里的数据放入结果集 list=mapper.map(rst);//imapper里有个map接口,里面存着结果集数据。把结果集的数据放入list集合 } catch (sqlexception e) { e.printstacktrace(); } return list; } public int count(string sql){//分页查询 count代表页数。 connection conn=null; preparedstatement pst=null; resultset rst=null; try { conn=getconnection(); pst=conn.preparestatement(sql); rst=pst.executequery(); while(rst.next()){ return rst.getint(1);//sql语句是select count(*) from stu,显示的是count值,就是一行。 } } catch (sqlexception e) { e.printstacktrace(); } return -1; } }
dbhelper类。在写之前先建一个properties文件,名字为db.properties(如图),注意不要建在包里面。
package com.student.db; import java.io.ioexception; import java.io.inputstream; import java.sql.connection; import java.sql.drivermanager; import java.sql.sqlexception; import java.util.properties; public class dbhelper { private static string driver; private static string url; private static string user; private static string password; static{ properties pro=new properties(); inputstream in=dbhelper.class.getclassloader() .getresourceasstream("db.properties");//读取文件数据 try { pro.load(in); } catch (ioexception e) { e.printstacktrace(); } driver=pro.getproperty("driver"); url=pro.getproperty("url"); user=pro.getproperty("user"); password=pro.getproperty("password"); } public static connection getconnection() throws classnotfoundexception, sqlexception{ class.forname(driver);//找驱动 return drivermanager.getconnection(url, user, password);//建连接 } }
(2)com.student.vo包。这里面有一个vo类,我们是要把数据库里的数据放到java里展示,用一个类对象把数据库里的信息一一对应起来就可以很容易的操作。数据库里的一个列对应类对象的一个属性。
package com.student.vo; public class student { private string stuid; private string name; private string age; private string sex; public string getstuid(){ return stuid; } public void setstuid(string stuid){ this.stuid=stuid; } public string getname() { return name; } public void setname(string name) { this.name = name; } public string getage() { return age; } public void setage(string age) { this.age = age; } public string getsex() { return sex; } public void setsex(string sex) { this.sex = sex; } public student(string stuid,string name,string sex,string age){ super(); this.stuid=stuid; this.name=name; this.age=age; this.sex=sex; } public student(){ super(); } }
(3)com.student.mapper包。这里面一个接口,一个实现类。
接口:
package com.student.mapper; import java.sql.resultset; import java.util.list; public interface imapper { list map(resultset rst);//声明一个方法存着结果集。 }
实现类:
package com.student.mapper; import java.sql.resultset; import java.sql.sqlexception; import java.util.arraylist; import java.util.list; import com.student.vo.student; public class stumapper implements imapper {//实现接口方法 public list map(resultset rst) { list<student> list=new arraylist<student>();//建一个集合,里面是student类里的信息。 try { while(rst.next()){// student stu=new student(); stu.setstuid(rst.getstring("stuid"));//类对象每一个属性对应数据库的每一列。 stu.setname(rst.getstring("stuname")); stu.setage(rst.getstring("age")); stu.setsex(rst.getstring("sex")); list.add(stu);//把类对象放到集合里 } } catch (sqlexception e) { e.printstacktrace(); } return list; } }
(4)com.student.dao包:这里面的studao类放着增删改查分页等功能
package com.student.dao; import java.util.list; import com.student.db.dbmanager; import com.student.mapper.imapper; import com.student.mapper.stumapper; import com.student.vo.student; public class studao { public list<student> check(){//查看 string sql="select * from student";//sql语句 dbmanager db=new dbmanager(); imapper mapper=new stumapper();//实现stumapper list<student> list=db.executequery(sql, mapper,null);//null是指占位符为null,因为查看的是所有信息 return list; } public boolean add(student stu){//添加 string sql="insert into student values(?,?,?,?)"; object[] params={stu.getstuid(),stu.getname(),stu.getage(),stu.getsex()}; dbmanager db=new dbmanager(); int i=db.executeupdate(sql, params); if(i>=0){ system.out.println("成功"); }else{ system.out.println("失败"); } return true; } public boolean update(student stu){//修改 string sql="update student set stuname=?,age=?,sex=? where stuid=?"; object params[]={stu.getname(),stu.getage(),stu.getsex(),stu.getstuid()}; dbmanager db=new dbmanager(); int i=db.executeupdate(sql, params); if(i>=0){ system.out.println("成功"); }else{ system.out.println("失败"); } return true; } public boolean delete(student stu){//删除 string sql="delete from student where stuid=?"; object params[]={stu.getstuid()}; dbmanager db=new dbmanager(); int i=db.executeupdate(sql, params); if(i>=0){ system.out.println("成功"); }else{ system.out.println("失败"); } return true; } public list<student> findpage(int pagesize,int pagenow){//分页 string sql="select * from (select rownum rn ,stu .* from stu) " + "where rownum<=? and rn>?";//分页公式 object []params={pagesize,(pagenow-1)*pagesize}; dbmanager db=new dbmanager(); imapper mapper=new stumapper(); return db.executequery(sql, mapper, params); } public int findcount(){ string sql="select count(*) from stu"; dbmanager db=new dbmanager(); return db.count(sql); } }
当把这一块写完之后,其实大部分就已经完成了,jdbc连接数据库基本上是固定的,多写几遍就明白了。
三、展示student信息,实现增删改查。看图:
(1)com.student.show包,展示界面:这里面内容比较多,但是都很容易理解
package com.student.show; import java.awt.event.actionevent; import java.awt.event.actionlistener; import java.sql.sqlexception; import java.sql.statement; import java.util.arraylist; import java.util.list; import javax.swing.jbutton; import javax.swing.jframe; import javax.swing.joptionpane; import javax.swing.jscrollpane; import javax.swing.jtable; import com.student.add.add; import com.student.check.check; import com.student.dao.studao; import com.student.delete.delete; import com.student.update.update; import com.student.vo.student; public class show extends jframe { public static int pagesize=5;//每页显示5条信息 public static int pagenow=1;//当前页为第一页 public show() { setsize(500, 430); setvisible(true); setdefaultcloseoperation(exit_on_close);//点x号就是关闭 setresizable(false);//不可改变窗口大小 setlocationrelativeto(null);//默认居中显示 setlayout(null);//采用坐标布局 studao dao = new studao();//前面我们已经把增删改查分页写到studao里面,现在就直接拿出来用 list<student> list =dao.findpage(pagesize, pagenow); student stu = new student(); for (int i = 0; i < list.size(); i++) { stu = list.get(i); } string[] rowname = { "学号", "姓名", "年龄", "性别" };//从这里开始是二维数组的遍历使用 object[][] data = new object[list.size()][4]; for (int i = 0; i < list.size(); i++) { student s = list.get(i); object st[] = { s.getstuid(), s.getname(), s.getage(), s.getsex() }; data[i] = st; } final jtable table = new jtable(data,rowname); jscrollpane jsp=new jscrollpane(table);//这一步不能省去,否则显示不出列名 jsp.setbounds(20, 10, 400, 200); add(jsp); jbutton jb11=new jbutton("首页"); jb11.setbounds(40,220,80,30); add(jb11); jbutton jb22=new jbutton("上一页"); jb22.setbounds(130,220,80,30); add(jb22); jbutton jb33=new jbutton("下一页"); jb33.setbounds(220,220,80,30); add(jb33); jbutton jb44=new jbutton("尾页"); jb44.setbounds(310,220,80,30); add(jb44); jbutton jb1 = new jbutton("查看信息"); jb1.setbounds(50, 270, 100, 30); add(jb1); jbutton jb2 = new jbutton("修改信息"); jb2.setbounds(280, 270, 100, 30); add(jb2); jbutton jb3 = new jbutton("添加信息"); jb3.setbounds(50, 320, 100, 30); add(jb3); jbutton jb4 = new jbutton("删除信息"); jb4.setbounds(280, 320, 100, 30); add(jb4); jbutton jb5 = new jbutton("退出"); jb5.setbounds(280, 360, 100, 30); add(jb5); jb1.addactionlistener(new actionlistener() {//查看 public void actionperformed(actionevent event) { int row = table.getselectedrow();//选中第几行 int index = 0; if(row==-1){ joptionpane.showmessagedialog(null,"您没有选中信息"); return; } string id = (string) table.getvalueat(row, index);// 跟check联系起来 check check=new check(id); check.setvisible(true); setvisible(false); } }); jb2.addactionlistener(new actionlistener() {//修改 public void actionperformed(actionevent event) { int row = table.getselectedrow(); int index = 0; if(row==-1){ joptionpane.showmessagedialog(null,"您没有选中信息"); return; } string id = (string) table.getvalueat(row, index);// 跟update联系起来 update up=new update(id); up.setvisible(true); setvisible(false); } }); jb3.addactionlistener(new actionlistener() {//添加 public void actionperformed(actionevent event) { add add = new add(); add.setvisible(true); setvisible(false); } }); jb4.addactionlistener(new actionlistener() {//删除 public void actionperformed(actionevent event) { int row = table.getselectedrow(); int index = 0; if(row==-1){ joptionpane.showmessagedialog(null,"您没有选中信息"); return; } string num=(string) table.getvalueat(row, index); delete d=new delete(num); d.setvisible(true); setvisible(false); } }); jb11.addactionlistener(new actionlistener() {//首页 public void actionperformed(actionevent event) { pagenow=1; show show=new show(); setvisible(false); show.setvisible(true); } }); jb22.addactionlistener(new actionlistener() {//上一页 public void actionperformed(actionevent event) { if(pagenow != 1){ pagenow=pagenow-1; }else{ return; } show show=new show(); setvisible(false); show.setvisible(true); } }); jb33.addactionlistener(new actionlistener() {//下一页 public void actionperformed(actionevent event) { studao dao=new studao(); int count=dao.findcount(); int pagecount=(count-1)/pagesize+1;//pagecount表示最后一页 if(pagenow != pagecount){ pagenow=pagenow+1; }else{ return; } show show=new show(); setvisible(false); show.setvisible(true); } }); jb44.addactionlistener(new actionlistener() {//尾页 public void actionperformed(actionevent event) { studao dao=new studao(); int count=dao.findcount(); int pagecount=(count-1)/pagesize+1; pagenow=pagecount; show show=new show(); setvisible(false); show.setvisible(true); } }); } public static void main(string args[]) { show s = new show(); } }
(2)增删改查:大同小异,因为我们在studao里面已经写好了,在用的时候就方便多了。
①添加:
package com.student.add; import java.sql.sqlexception; import java.util.list; import javax.swing.jbutton; import javax.swing.jframe; import javax.swing.jlabel; import javax.swing.joptionpane; import javax.swing.jtextfield; import com.student.dao.studao; import com.student.db.dbmanager; import com.student.show.show; import com.student.vo.student; public class add extends jframe{ public add(){ setsize(300,400); setvisible(true); setdefaultcloseoperation(exit_on_close); setresizable(false); setlocationrelativeto(null); setlayout(null); jlabel j0=new jlabel("添加信息"); j0.setbounds(100,20,80,30); add(j0); jlabel j1=new jlabel("学号:"); j1.setbounds(30,70,50,30); add(j1); final jtextfield jt1=new jtextfield(); jt1.setbounds(100,70,130,30); add(jt1); jlabel j2=new jlabel("姓名:"); j2.setbounds(30,120,50,30); add(j2); final jtextfield jt2=new jtextfield(); jt2.setbounds(100,120,130,30); add(jt2); jlabel j3=new jlabel("性别:"); j3.setbounds(30,170,50,30); add(j3); final jtextfield jt3=new jtextfield(); jt3.setbounds(100,170,130,30); add(jt3); jlabel j4=new jlabel("年龄:"); j4.setbounds(30,220,50,30); add(j4); final jtextfield jt4=new jtextfield(); jt4.setbounds(100,220,130,30); add(jt4); jbutton jb1=new jbutton("添加"); jb1.setbounds(50,280,80,30); add(jb1); jbutton jb2=new jbutton("返回"); jb2.setbounds(150,280,80,30); add(jb2); jb1.addactionlistener(new actionlistener(){ public void actionperformed(actionevent event){ string a=jt1.gettext();//获取输入的信息 string b=jt2.gettext(); string c=jt3.gettext(); string d=jt4.gettext(); student stu=new student(a,b,c,d); studao dao=new studao(); list<student> list=dao.check();//调用studao里面的check()方法 for(student st:list){//遍历集合 if(st.getstuid().equals(a)){ joptionpane.showmessagedialog(null,"该账号存在"); return; } } dao.add(stu); joptionpane.showmessagedialog(null,"添加成功"); show show=new show(); show.setvisible(true); setvisible(false); } }); jb2.addactionlistener(new actionlistener(){ public void actionperformed(actionevent event){ show s=new show(); s.setvisible(true); setvisible(false); } }); } public static void main(string []args){ add add=new add(); } }
②修改:
package com.student.update; import java.awt.event.actionevent; import java.awt.event.actionlistener; import java.util.list; import javax.swing.jbutton; import javax.swing.jframe; import javax.swing.jlabel; import javax.swing.joptionpane; import javax.swing.jtextfield; import com.student.dao.studao; import com.student.db.dbmanager; import com.student.show.show; import com.student.vo.student; public class update extends jframe{ public update(final string id){ setsize(300,400); setvisible(true); setdefaultcloseoperation(exit_on_close); setresizable(false); setlocationrelativeto(null); setlayout(null); jlabel j0=new jlabel("修改信息"); j0.setbounds(100,20,80,30); add(j0); jlabel j1=new jlabel("学号:"); j1.setbounds(30,70,50,30); add(j1); final jlabel jt1=new jlabel(); jt1.setbounds(100,70,130,30); add(jt1); jlabel j2=new jlabel("姓名:"); j2.setbounds(30,120,50,30); add(j2); final jtextfield jt2=new jtextfield(); jt2.setbounds(100,120,130,30); add(jt2); jlabel j3=new jlabel("年龄:"); j3.setbounds(30,170,50,30); add(j3); final jtextfield jt3=new jtextfield(); jt3.setbounds(100,170,130,30); add(jt3); jlabel j4=new jlabel("性别:"); j4.setbounds(30,220,50,30); add(j4); final jtextfield jt4=new jtextfield(); jt4.setbounds(100,220,130,30); add(jt4); jbutton jb1=new jbutton("修改"); jb1.setbounds(50,280,80,30); add(jb1); jbutton jb2=new jbutton("返回"); jb2.setbounds(150,280,80,30); add(jb2); studao dao=new studao(); list<student> list=dao.check(); student stu=new student(); for(int i=0;i<list.size();i++){//遍历,找到与id相同的学号。 stu=list.get(i); if(stu.getstuid().equals(id)){//id是参数,跟前面show联系起来。 break; } } jt1.settext(stu.getstuid()); jt2.settext(stu.getname()); jt3.settext(stu.getage()); jt4.settext(stu.getsex()); jb1.addactionlistener(new actionlistener(){ public void actionperformed(actionevent event){ studao dao=new studao(); student stu=new student(); stu.setstuid(id); stu.setname(jt2.gettext()); stu.setage(jt3.gettext()); stu.setsex(jt4.gettext()); dao.update(stu);//studao里的update()已经写好如何修改,这里直接用 joptionpane.showmessagedialog(null,"修改成功"); show show=new show(); show.setvisible(true); setvisible(false); } }); jb2.addactionlistener(new actionlistener(){ public void actionperformed(actionevent event){ show s=new show(); s.setvisible(true); setvisible(false); } }); } }
③查看:
package com.student.check; import java.awt.event.actionevent; import java.awt.event.actionlistener; import java.util.list; import javax.swing.jbutton; import javax.swing.jframe; import javax.swing.jlabel; import javax.swing.jtextfield; import com.student.dao.studao; import com.student.show.show; import com.student.vo.student; public class check extends jframe{ public check(string id) { setsize(300,400); setvisible(true); setdefaultcloseoperation(exit_on_close); setresizable(false); setlocationrelativeto(null); setlayout(null); jlabel j0=new jlabel("学生信息"); j0.setbounds(100,20,80,30); add(j0); jlabel j1=new jlabel("学号:"); j1.setbounds(30,70,50,30); add(j1); final jlabel jt1=new jlabel(); jt1.setbounds(100,70,130,30); add(jt1); jlabel j2=new jlabel("姓名:"); j2.setbounds(30,120,50,30); add(j2); final jlabel jt2=new jlabel(); jt2.setbounds(100,120,130,30); add(jt2); jlabel j3=new jlabel("年龄:"); j3.setbounds(30,170,50,30); add(j3); final jlabel jt3=new jlabel(); jt3.setbounds(100,170,130,30); add(jt3); jlabel j4=new jlabel("性别:"); j4.setbounds(30,220,50,30); add(j4); final jlabel jt4=new jlabel(); jt4.setbounds(100,220,130,30); add(jt4); jbutton jb1=new jbutton("确认"); jb1.setbounds(50,280,80,30); add(jb1); jbutton jb2=new jbutton("返回"); jb2.setbounds(150,280,80,30); add(jb2); studao dao=new studao(); list<student> list=dao.check(); student stu=new student(); for(int i=0;i<list.size();i++){ stu=list.get(i); if(stu.getstuid().equals(id)){ break; } } jt1.settext(stu.getstuid()); jt2.settext(stu.getname()); jt3.settext(stu.getage()); jt4.settext(stu.getsex()); jb1.addactionlistener(new actionlistener(){ public void actionperformed(actionevent event){ show s=new show(); s.setvisible(true); setvisible(false); } }); jb2.addactionlistener(new actionlistener(){ public void actionperformed(actionevent event){ show s=new show(); s.setvisible(true); setvisible(false); } }); } }
④删除:
package com.student.delete; import java.awt.event.actionevent; import java.awt.event.actionlistener; import java.util.list; import javax.swing.jbutton; import javax.swing.jframe; import javax.swing.jlabel; import javax.swing.joptionpane; import javax.swing.jtextfield; import com.student.dao.studao; import com.student.db.dbmanager; import com.student.show.show; import com.student.vo.student; public class delete extends jframe{ public delete(final string num){ setsize(300,400); setvisible(true); setdefaultcloseoperation(exit_on_close); setresizable(false); setlocationrelativeto(null); setlayout(null); jlabel j0=new jlabel("您确认要删除该信息吗"); j0.setbounds(100,20,200,30); add(j0); jlabel j1=new jlabel("学号:"); j1.setbounds(30,70,50,30); add(j1); final jlabel jt1=new jlabel(); jt1.setbounds(100,70,130,30); add(jt1); jlabel j2=new jlabel("姓名:"); j2.setbounds(30,120,50,30); add(j2); final jlabel jt2=new jlabel(); jt2.setbounds(100,120,130,30); add(jt2); jlabel j3=new jlabel("年龄:"); j3.setbounds(30,170,50,30); add(j3); final jlabel jt3=new jlabel(); jt3.setbounds(100,170,130,30); add(jt3); jlabel j4=new jlabel("性别:"); j4.setbounds(30,220,50,30); add(j4); final jlabel jt4=new jlabel(); jt4.setbounds(100,220,130,30); add(jt4); jbutton jb1=new jbutton("确认"); jb1.setbounds(20,280,80,30); add(jb1); jbutton jb2=new jbutton("返回"); jb2.setbounds(180,280,80,30); add(jb2); studao dao=new studao(); list<student> list=dao.check(); student stu=new student(); for(int i=0;i<list.size();i++){ stu=list.get(i); if(stu.getstuid().equals(num)){ break; } } jt1.settext(stu.getstuid()); jt2.settext(stu.getname()); jt3.settext(stu.getage()); jt4.settext(stu.getsex()); jb1.addactionlistener(new actionlistener(){ public void actionperformed(actionevent event){ studao dao=new studao(); student stu=new student(); stu.setstuid(num); dao.delete(stu); joptionpane.showmessagedialog(null,"删除成功"); show show=new show(); show.setvisible(true); setvisible(false); } }); jb2.addactionlistener(new actionlistener(){ public void actionperformed(actionevent event){ show s=new show(); s.setvisible(true); setvisible(false); } }); } }
最后贴一下登录页面,因为是以管理者的身份登录的不需要判断,就非常简单:
package com.student.login; 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.jpasswordfield; import javax.swing.jtextfield; import com.student.show.show; public class login extends jframe{ public login(){ setsize(300,250); setvisible(true); setdefaultcloseoperation(exit_on_close); setresizable(false); setlocationrelativeto(null); setlayout(null); jlabel j=new jlabel("登录窗口"); j.setbounds(100,20,80,30); add(j); jlabel j1=new jlabel("用户名:"); j1.setbounds(50,80,60,30); add(j1); final jtextfield jt1=new jtextfield(); jt1.setbounds(120,80,120,30); add(jt1); jlabel j2=new jlabel("密 码:"); j2.setbounds(50,130,60,30); add(j2); final jpasswordfield jp=new jpasswordfield(); jp.setbounds(120,130,120,30); add(jp); jbutton jb1=new jbutton("登录"); jb1.setbounds(70,180,60,30); add(jb1); jbutton jb2=new jbutton("重置"); jb2.setbounds(170,180,60,30); add(jb2); jb1.addactionlistener(new actionlistener(){ public void actionperformed(actionevent event){ string id=jt1.gettext(); char ch[]=jp.getpassword(); string pass=new string(ch); if(id.equals(abcdefj){//设置用户名为abcdefj if(pass.equals(123456)){//设置密码为123456 joptionpane.showmessagedialog(null,"登录成功"); show s=new show();//成功后跳到show s.setvisible(true); setvisible(false); }else{ joptionpane.showmessagedialog(null,"密码错误"); jt1.settext(""); return; } }else{ joptionpane.showmessagedialog(null,"您输入的账号有误"); jt1.settext(""); jp.settext(""); return; } } }); } public static void main(string []args){ login lo=new login(); } }
写在最后:
刚开始学的时候感觉很绕,尤其是jdbc那,后来发现,是因为前面java基础掌握的不行,我又回去好好复习了java基础,才发现jdbc是死的,固定的写法,背过就行了。所以再做这个学生管理系统,就感觉不复杂了。先有一个大的思路,然后顺着思路往下走,逐步实现每个功能。
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。
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