本文实例为大家分享了java gui学生图书管理的具体代码，供大家参考，具体内容如下
- mysql数据库建表：
1.book表
2.bs借书记录表
3.std学生表
4.dl登录用户表
.
- 列表内容
1.databd.java //程序入口及登录验证
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import java.awt.*;import java.awt.event.*;import java.sql.*;import javax.swing.*;import javax.swing.border.emptyborder;public class databd extends jframe implements actionlistener{ static framedemo a=null; string getuser=""; string getpd=""; string sql = "select * from dl where id='"; string sql1 = "select password from dl where password='"; jbutton btnnewbutton = new jbutton("登录"); jbutton btnnewbutton_1 = new jbutton("注册"); jtextfield show=new jtextfield("\t 请选择按钮",10); private jpanel contentpane; private jtextfield userfield; private jpasswordfield pwdfield; private statement statement = null; //查询账号 private statement statement2 = null; //注册账户 private static databd frame; // resultset rst2=null; public static void main(string[] args) { eventqueue.invokelater(new runnable() { public void run() { try { frame = new databd(); frame.setvisible(true); } catch (exception e) { e.printstacktrace(); } } }); } public databd() { string driver = "com.mysql.jdbc.driver"; string url = "jdbc:mysql://localhost:8088/library?useunicode=true&characterencoding=utf-8&usessl=false"; string user = "root"; string password = "11111"; try{ class.forname(driver); connection conn = drivermanager.getconnection(url, user, password); connection conn2 = drivermanager.getconnection(url, user, password); statement = conn.createstatement(); statement2 = conn2.createstatement(resultset.type_scroll_sensitive,resultset.concur_updatable); rst2=statement2.executequery("select * from dl"); show.seteditable(false); setdefaultcloseoperation(jframe.exit_on_close); setsize(250, 200); setlocationrelativeto(null); contentpane = new jpanel(); contentpane.setborder(new emptyborder(5, 5, 5, 5)); contentpane.setlayout(null); add(contentpane); jlabel lblusername = new jlabel("账号"); lblusername.setbounds(12, 13, 54, 15); contentpane.add(lblusername); jlabel lblpassword = new jlabel("密码"); lblpassword.setbounds(12, 38, 54, 15); contentpane.add(lblpassword); userfield = new jtextfield(); userfield.setbounds(76, 10, 144, 21); contentpane.add(userfield); userfield.setcolumns(10); pwdfield = new jpasswordfield(); pwdfield.setechochar('*'); //密码回显字符 pwdfield.setbounds(76, 35, 144, 21); contentpane.add(pwdfield); pwdfield.setcolumns(10); add(show,borderlayout.south); btnnewbutton.addactionlistener(this); //登录 btnnewbutton.setbounds(10, 92, 93, 23); contentpane.add(btnnewbutton); btnnewbutton_1.addactionlistener(this); //注册 btnnewbutton_1.setbounds(127, 92, 93, 23); contentpane.add(btnnewbutton_1); show.addactionlistener(this); }catch(classnotfoundexception e){system.out.print("不能找到驱动器"); }catch(exception e){system.out.print("出现错误");e.printstacktrace();} } public void actionperformed(actionevent e) { getuser=userfield.gettext().trim()+"'"; string pd=string.valueof(pwdfield.getpassword()); try{ resultset rs=statement.executequery(sql+getuser); if(e.getsource()==btnnewbutton){ //登录 if(rs.next()){ if(rs.getstring(2).equals(pd)){ frame.setvisible(false); joptionpane.showmessagedialog(null, "登录成功"); uimanager.setlookandfeel(uimanager.getsystemlookandfeelclassname()); a=framedemo.a; //生成静态对象 }else show.settext("\t 密码错误"); } else show.settext("\t 账号不存在"); } else if(e.getsource()==btnnewbutton_1){ //注册 if(userfield.gettext().equals("")){ show.settext("\t 注册账号不能为空");} else { if((string.valueof(pwdfield.getpassword())).equals("")) show.settext("\t 注册密码不能为空"); else {register();} } } }catch(exception c){c.printstacktrace();} } private void register(){ string name=userfield.gettext(), passwd=string.valueof(pwdfield.getpassword()); try{ rst2.movetoinsertrow(); rst2.updatestring(1, name); rst2.updatestring(2, passwd); rst2.insertrow(); rst2.movetocurrentrow(); show.settext("\t 注册成功"); }catch(exception e){show.settext("\t 注册失败");} }} |
2.framedemo //主框架，处理事件交给addinformation类
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package database;import javax.swing.*;import javax.swing.border.titledborder;import java.awt.*;import java.awt.event.*;import java.sql.*;import java.util.calendar;import java.util.gregoriancalendar;public class framedemo extends jframe implements actionlistener{ public static framedemo a=new framedemo(); jpanel panel=new jpanel(), panel1=new jpanel(), panel2=new jpanel(), panel3=new jpanel(), panel4=new jpanel(), panel5=new jpanel(); string[] adds={"请选择操作","添加馆藏记录","添加借书记录","添加学生记录"}; string[] deletes={"请选择操作","删除馆藏记录","删除借书记录","删除学生记录"}; string[] changes={"请选择操作","修改库存记录","修改应还日期"}; string[] querys={"请选择操作","查询书籍","查询书号","查询学生借书记录","查询学生信息"}; string[] shows={"请选择操作","显示所有馆藏记录","显示借书记录","显示学生记录"}; string[] record=new string[4]; jtextarea ta=new jtextarea("-->欢迎使用系统\n",11,60); jscrollpane pane=new jscrollpane(ta); connection conn=null; statement stmt=null; statement stmt1=null; statement stmt2=null; resultset rst=null; resultset rst1=null; resultset rst2=null; static boolean key; private jframe big=new jframe("请选择操作"); private jcombobox add=new jcombobox(adds); private jcombobox delete=new jcombobox(deletes); private jcombobox change=new jcombobox(changes); private jcombobox query=new jcombobox(querys); private jcombobox show=new jcombobox(shows); public framedemo(){ super("图书馆管理系统"); try{ class.forname("com.mysql.jdbc.driver"); string url="jdbc:mysql://localhost:8088/library?useunicode=true&characterencoding=utf-8&usessl=false"; string user="root"; string password="11111"; conn=drivermanager.getconnection(url, user, password); panel4.setlayout(new gridlayout(3,1,30,10)); panel4.setborder(new titledborder("选择管理:")); panel1.add(new jlabel("添加记录:")); panel1.add(add); panel1.add(new jlabel("删除记录:")); panel1.add(delete); panel2.add(new jlabel("修改记录:")); panel2.add(change); panel2.add(new jlabel("查询记录:")); panel2.add(query); panel3.add(new jlabel("显示记录:")); panel3.add(show); panel4.add(panel1);panel4.add(panel2);panel4.add(panel3); panel5.add(pane); panel.add(panel5,borderlayout.south); panel.add(panel4,borderlayout.center); add(panel); //pack(); stmt=conn.createstatement(resultset.type_scroll_sensitive,resultset.concur_updatable);//可滚可更 stmt1=conn.createstatement(resultset.type_scroll_sensitive,resultset.concur_updatable); stmt2=conn.createstatement(resultset.type_scroll_sensitive,resultset.concur_updatable); add.addactionlistener(this); delete.addactionlistener(this); change.addactionlistener(this); query.addactionlistener(this); show.addactionlistener(this); setsize(470,440); //setresizable(false); setlocationrelativeto(null); setvisible(true); setdefaultcloseoperation(jframe.exit_on_close); }catch(exception e){e.printstacktrace();} } public void actionperformed(actionevent ae){ try{ //if(key){ //数据库非空 if(add.getselectedindex()==1){ ta.append("-->添加馆藏记录\n"); addinformation a1=new addinformation("图书编号", "书名", "库存",1); } else if(add.getselectedindex()==2){ ta.append("-->添加借书记录\n"); addinformation a1=new addinformation("图书编号", "学号",2); } else if(add.getselectedindex()==3){ ta.append("-->添加学生记录\n"); addinformation a1=new addinformation("学生学号", "学生姓名",3); } add.setselecteditem("请选择操作"); if(delete.getselectedindex()==1){ ta.append("-->删除馆藏记录\n"); addinformation a1=new addinformation("图书编号",4); } else if(delete.getselectedindex()==2){ ta.append("-->删除借书记录\n"); addinformation a1=new addinformation("图书编号","学生学号",5); } else if(delete.getselectedindex()==3){ ta.append("-->删除学生记录\n"); addinformation a1=new addinformation("学生学号",6); } delete.setselecteditem("请选择操作"); if(change.getselectedindex()==1){ ta.append("-->修改库存记录\n"); addinformation a1=new addinformation("图书编号","库存数目",7); } else if(change.getselectedindex()==2){ ta.append("-->修改应还日期\n"); addinformation a1=new addinformation("图书编号","学生学号","应还日期",8); } change.setselecteditem("请选择操作"); if(query.getselectedindex()==1){ ta.append("-->按书名查询\n"); addinformation a1=new addinformation("书名",9); } else if(query.getselectedindex()==2){ ta.append("-->按书籍编号查询\n"); addinformation a1=new addinformation("书籍编号",10); } else if(query.getselectedindex()==3){ ta.append("-->查询学生借书记录\n"); addinformation a1=new addinformation("学生学号",11); } else if(query.getselectedindex()==4){ ta.append("-->查询学生信息\n"); addinformation a1=new addinformation("学生学号",12); } query.setselecteditem("请选择操作"); if(show.getselectedindex()==1){ ta.append("-->显示所有馆藏记录\n"); try{ rst=stmt.executequery("select * from book"); rst.first(); ta.append("------------------------------------\n"); int id=rst.getint(1); string name=rst.getstring(2); int num=rst.getint(3); ta.append("\t书籍编号\t书籍名称\t在馆库存\n"); ta.append("\t"+id+"\t"+name+"\t"+num+"\n"); while(rst.next()){ id=rst.getint(1); name=rst.getstring(2); num=rst.getint(3); ta.append("\t"+id+"\t"+name+"\t"+num+"\n"); }//执行后游标指向最后一行的后一个位置 rst.first(); ta.append("------------------------------------\n"); }catch(exception e){ta.append("-->显示错误");} } else if(show.getselectedindex()==2){ ta.append("-->显示借书记录\n"); rst1=stmt1.executequery("select * from bs"); calendar calendar =new gregoriancalendar(); try{ rst1.first(); ta.append("----------------------------------------------------\n"); int bookid=rst1.getint(2); int stdid=rst1.getint(3); date x=rst1.getdate(4); calendar.settime(x); calendar.add(calendar.date, 30); java.util.date utildate = (java.util.date)calendar.gettime(); utildate = (java.util.date)calendar.gettime(); date newdate =new date(utildate.gettime()); ta.append("\t书籍编号\t学生学号\t借书日期\t\t应还日期\n"); ta.append("\t"+bookid+"\t"+stdid+"\t"+x+"\t"+newdate+"\n"); while(rst1.next()){ bookid=rst1.getint(2); stdid=rst1.getint(3); x=rst1.getdate(4); calendar.settime(x); calendar.add(calendar.date, 30); utildate = (java.util.date)calendar.gettime(); utildate = (java.util.date)calendar.gettime(); newdate =new date(utildate.gettime()); ta.append("\t"+bookid+"\t"+stdid+"\t"+x+"\t"+newdate+"\n"); }//执行后游标指向最后一行的后一个位置 rst1.first(); ta.append("----------------------------------------------------\n"); }catch(exception e){ta.append("-->显示错误");e.printstacktrace();} } else if(show.getselectedindex()==3){ ta.append("-->显示学生记录\n"); try{ rst2=stmt2.executequery("select * from std"); rst2.first(); ta.append("------------------------------------\n"); int id=rst2.getint(1); string name=rst2.getstring(2); ta.append("\t学生学号\t学生姓名\n"); ta.append("\t"+id+"\t"+name+"\t"+"\n"); while(rst2.next()){ id=rst2.getint(1); name=rst2.getstring(2); ta.append("\t"+id+"\t"+name+"\t"+"\n"); }//执行后游标指向最后一行的后一个位置 rst2.first(); ta.append("------------------------------------\n"); }catch(exception e){ta.append("-->显示错误");} } show.setselecteditem("请选择操作"); ta.setcaretposition(ta.gettext().length()); //滚动条保持在最后一条 }catch(exception e){e.printstacktrace();} } public void showmessage(){ try{ int a=rst.getrow(); ta.append(a+"\n"); rst.first(); ta.append("---------------------------\n"); string id=rst.getstring(1), name=rst.getstring(2), brand=rst.getstring(3), price=rst.getstring(4), stock=rst.getstring(5); ta.append(id+" "+name+" "+brand+" "+price+" "+stock+"\n"); while(rst.next()){ id=rst.getstring(1); name=rst.getstring(2); brand=rst.getstring(3); price=rst.getstring(4); stock=rst.getstring(5); ta.append(id+" "+name+" "+brand+" "+price+" "+stock+"\n"); }//执行后游标指向最后一行的后一个位置 rst.absolute(a); ta.append("---------------------------\n"); }catch(exception e){ta.append("-->显示错误");} }// public static void main(string[] args){ // try{//uimanager.setlookandfeel(uimanager.getsystemlookandfeelclassname()); // }catch(exception e){system.out.print("1111111111");}// a=new framedemo();// } } |
3.addinformation.java //处理事件
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package database;import javax.swing.*;import java.util.calendar;import java.util.gregoriancalendar;import java.awt.*;import java.awt.event.*;import java.sql.*;public class addinformation extends jframe implements actionlistener{ jbutton sure=new jbutton("确定"), quxiao=new jbutton("取消"); jtextfield jtf1=new jtextfield(10), jtf2=new jtextfield(10), jtf3=new jtextfield(10); connection conn=null; static{ try{ class.forname("com.mysql.jdbc.driver"); }catch(exception e){e.printstacktrace();} } int x=0; public connection getconnection() throws sqlexception{ if(conn==null){ conn=drivermanager.getconnection("jdbc:mysql://localhost:8088/library?useunicode=true&characterencoding=utf-8&usessl=false","root","11111"); } return conn; } addinformation(string s1,string s2,string s3,int m){ jpanel p=new jpanel(); p.setlayout(new flowlayout()); p.add(new jlabel(s1)); p.add(jtf1); p.add(new jlabel(s2)); p.add(jtf2); p.add(new jlabel(s3)); p.add(jtf3); p.add(sure); p.add(quxiao); add(p); if(m==8){ joptionpane.showmessagedialog(null, "图书日期应为 xxxx-xx-xx 格式！","警告",joptionpane.warning_message); } setsize(500, 100); setvisible(true); setdefaultcloseoperation(jframe.dispose_on_close); setlocationrelativeto(null); sure.addactionlistener(this); quxiao.addactionlistener(this); x=m; } addinformation(string s1,string s2,int m){ jpanel p=new jpanel(); p.setlayout(new flowlayout()); p.add(new jlabel(s1)); p.add(jtf1); p.add(new jlabel(s2)); p.add(jtf2); p.add(sure); p.add(quxiao); add(p); setsize(500, 100); setvisible(true); setdefaultcloseoperation(jframe.dispose_on_close); setlocationrelativeto(null); sure.addactionlistener(this); quxiao.addactionlistener(this); x=m; } addinformation(string s1,int m){ jpanel p=new jpanel(); p.setlayout(new flowlayout()); p.add(new jlabel(s1)); p.add(jtf1); if(m==4){ joptionpane.showmessagedialog(null, "若存在借阅记录则不能删除书籍信息！","警告",joptionpane.warning_message); } if(m==6){ joptionpane.showmessagedialog(null, "若学生存在借阅记录则不能删除该学生信息！","警告",joptionpane.warning_message); } p.add(sure); p.add(quxiao); add(p); setsize(500, 80); setvisible(true); setdefaultcloseoperation(jframe.dispose_on_close); setlocationrelativeto(null); sure.addactionlistener(this); quxiao.addactionlistener(this); x=m; } public void actionperformed(actionevent ae){ if(ae.getsource()==sure){ if(x==1){ //添加 馆藏记录 string sql="insert into book values(?,?,?)"; try( connection conn=getconnection(); preparedstatement stmt=conn.preparestatement(sql)){ int id=integer.parseint(jtf1.gettext()); string name=jtf2.gettext(); int num=integer.parseint(jtf3.gettext()); stmt.setint(1, id); stmt.setstring(2, name); stmt.setint(3, num); stmt.executeupdate(); framedemo.a.ta.append("-->添加成功\n"); }catch(exception x){framedemo.a.ta.append("-->插入出错\n");x.printstacktrace();} addinformation.this.dispose(); } if(x==2){ //添加借书记录 string sql="insert into bs(bookid,stdid,date) values(?,?,?)"; string sql1="select id,num from book where id=?"; string sql2="select id from std where id=?"; try{ connection conn1=getconnection(); preparedstatement stmt1=conn1.preparestatement(sql1,resultset.type_scroll_sensitive,resultset.concur_updatable); stmt1.setint(1,integer.parseint(jtf1.gettext())); resultset rst1=stmt1.executequery();//找有没有这本书和库存是否为0 if(rst1.next()&&(rst1.getint(2)>0)){ int n=rst1.getint(2);n-=1; int m=rst1.getint(1); rst1.updateint(1, m); rst1.updateint(2, n); rst1.updaterow(); connection conn2=getconnection(); preparedstatement stmt2=conn2.preparestatement(sql2); stmt2.setint(1,integer.parseint(jtf2.gettext())); resultset rst2=stmt2.executequery();//有人 if(rst2.next()){ connection conn=getconnection(); preparedstatement stmt=conn.preparestatement(sql); int bookid=integer.parseint(jtf1.gettext()); int stdid=integer.parseint(jtf2.gettext()); stmt.setint(1, bookid); stmt.setint(2, stdid); stmt.setdate(3, new date(system.currenttimemillis())); stmt.executeupdate(); framedemo.a.ta.append("-->添加成功\n"); } else{framedemo.a.ta.append("-->无该学生记录，不能添加借阅记录\n");} }else{framedemo.a.ta.append("-->无此书或已全部借出\n");} }catch(exception x){framedemo.a.ta.append("-->插入出错\n");x.printstacktrace();} addinformation.this.dispose(); } if(x==3){ //添加学生记录 string sql="insert into std values(?,?)"; try( connection conn=getconnection(); preparedstatement stmt=conn.preparestatement(sql)){ int id=integer.parseint(jtf1.gettext()); string name=jtf2.gettext(); stmt.setint(1, id); stmt.setstring(2, name); stmt.executeupdate(); framedemo.a.ta.append("-->添加成功\n"); }catch(exception x){framedemo.a.ta.append("-->插入出错\n");x.printstacktrace();} addinformation.this.dispose(); } if(x==4){ //删除图书记录 string sql="delete from book where id=?"; string sql1="select * from bs where bookid=?"; try{ connection conn1=getconnection(); preparedstatement stmt1=conn1.preparestatement(sql1); stmt1.setint(1,integer.parseint(jtf1.gettext())); resultset rst1=stmt1.executequery(); if(rst1.next()){ //借阅记录中有书 joptionpane.showmessagedialog(null, "借阅记录中有该书的借阅记录！","警告",joptionpane.warning_message); } else{ //借阅记录无书，可以删掉 connection conn=getconnection(); preparedstatement stmt=conn.preparestatement(sql); int id=integer.parseint(jtf1.gettext()); stmt.setint(1, id); int t=stmt.executeupdate(); if(t==0){ framedemo.a.ta.append("-->删除出错\n"); joptionpane.showmessagedialog(null, "不存在该图书信息！","警告",joptionpane.warning_message); } else framedemo.a.ta.append("-->删除记录成功\n"); } }catch(exception x){framedemo.a.ta.append("-->删除失败\n");x.printstacktrace();} addinformation.this.dispose(); } if(x==5){ //删除借书记录 string sql="delete from bs where bookid=? and stdid=?"; string sql1="select id,num from book where id=?"; try{ connection conn=getconnection(); preparedstatement stmt=conn.preparestatement(sql); int bookid=integer.parseint(jtf1.gettext()); int stdid=integer.parseint(jtf2.gettext()); stmt.setint(1, bookid); stmt.setint(2, stdid); int t=stmt.executeupdate(); if(t!=0){ connection conn1=getconnection(); preparedstatement stmt1=conn1.preparestatement(sql1,resultset.type_scroll_sensitive,resultset.concur_updatable); stmt1.setint(1,integer.parseint(jtf1.gettext())); resultset rst1=stmt1.executequery();rst1.next(); int m=rst1.getint(1); int n=rst1.getint(2);n+=1; rst1.updateint(1, m); rst1.updateint(2, n); rst1.updaterow(); framedemo.a.ta.append("-->删除借阅记录成功\n"); } else{ framedemo.a.ta.append("-->删除出错\n"); joptionpane.showmessagedialog(null, "不存在这条借阅记录！","警告",joptionpane.warning_message); } }catch(exception x){framedemo.a.ta.append("-->删除出错\n");x.printstacktrace();} addinformation.this.dispose(); } if(x==6){ //删除学生记录 string sql="delete from std where id=?"; string sql1="select * from bs where stdid=?"; try { connection conn1=getconnection(); preparedstatement stmt1=conn1.preparestatement(sql1); stmt1.setint(1,integer.parseint(jtf1.gettext())); resultset rst1=stmt1.executequery(); if(rst1.next()){ //借阅记录中有该人 joptionpane.showmessagedialog(null, "借阅记录中有该人的借阅记录！","警告",joptionpane.warning_message); } else{ connection conn=getconnection(); preparedstatement stmt=conn.preparestatement(sql); int stdid=integer.parseint(jtf1.gettext()); stmt.setint(1, stdid); int t=stmt.executeupdate(); if(t==0){ framedemo.a.ta.append("-->删除出错\n"); joptionpane.showmessagedialog(null, "不存在该学生记录！","警告",joptionpane.warning_message); } else framedemo.a.ta.append("-->删除记录成功\n"); } }catch(exception x){framedemo.a.ta.append("-->删除出错\n");x.printstacktrace();} addinformation.this.dispose(); } if(x==7){ //修改图书库存记录 string sql="update book set num=? where id=?"; try( connection conn=getconnection(); preparedstatement stmt=conn.preparestatement(sql)){ int num=integer.parseint(jtf2.gettext()); int bookid=integer.parseint(jtf1.gettext()); stmt.setint(1, num); stmt.setint(2, bookid); int t=stmt.executeupdate(); if(t==0){ framedemo.a.ta.append("-->修改出错\n"); joptionpane.showmessagedialog(null, "不存在该图书记录！","警告",joptionpane.warning_message); } else framedemo.a.ta.append("-->修改记录成功\n"); }catch(exception x){framedemo.a.ta.append("-->修改出错\n");x.printstacktrace();} addinformation.this.dispose(); } if(x==8){ //修改应还日期 string sql="update bs set date=? where bookid=? and stdid=?"; try( connection conn=getconnection(); preparedstatement stmt=conn.preparestatement(sql)){ date date = date.valueof(jtf3.gettext()); calendar calendar =new gregoriancalendar(); calendar.settime(date); calendar.add(calendar.date, -30); java.util.date utildate = (java.util.date)calendar.gettime(); utildate = (java.util.date)calendar.gettime(); date newdate =new date(utildate.gettime()); int stdid=integer.parseint(jtf2.gettext()); int bookid=integer.parseint(jtf1.gettext()); stmt.setdate(1, newdate); stmt.setint(2, bookid); stmt.setint(3, stdid); int t=stmt.executeupdate(); if(t==0){ framedemo.a.ta.append("-->修改出错\n"); joptionpane.showmessagedialog(null, "不存在该借书记录！","警告",joptionpane.warning_message); } else framedemo.a.ta.append("-->修改记录成功\n"); }catch(exception x){framedemo.a.ta.append("-->修改出错\n");x.printstacktrace();} addinformation.this.dispose(); } if(x==9){ //按书名查询 string sql="select * from book where name=?"; resultset rst=null; try( connection conn=getconnection(); preparedstatement stmt=conn.preparestatement(sql)){ string name=jtf1.gettext(); stmt.setstring(1, name); rst=stmt.executequery(); if(rst.next()){ framedemo.a.ta.append("---------------------------------------\n"); framedemo.a.ta.append("\t图书编号\t书名\t在馆数\n"); framedemo.a.ta.append("\t"+rst.getint(1)+"\t"+rst.getstring(2)+"\t"+rst.getint(3)+"\n"); framedemo.a.ta.append("---------------------------------------\n"); } else{ framedemo.a.ta.append("-->查询出错\n"); joptionpane.showmessagedialog(null, "不存在该书！","警告",joptionpane.warning_message); } }catch(exception x){framedemo.a.ta.append("-->查询出错\n");x.printstacktrace();} addinformation.this.dispose(); } if(x==10){ //按书籍编号查询 string sql="select * from book where id=?"; resultset rst=null; try( connection conn=getconnection(); preparedstatement stmt=conn.preparestatement(sql)){ stmt.setint(1, integer.parseint(jtf1.gettext())); rst=stmt.executequery(); if(rst.next()){ framedemo.a.ta.append("---------------------------------------\n"); framedemo.a.ta.append("\t图书编号\t书名\t在馆数\n"); framedemo.a.ta.append("\t"+rst.getint(1)+"\t"+rst.getstring(2)+"\t"+rst.getint(3)+"\n"); framedemo.a.ta.append("---------------------------------------\n"); } else{ framedemo.a.ta.append("-->查询出错\n"); joptionpane.showmessagedialog(null, "不存在该书！","警告",joptionpane.warning_message); } }catch(exception x){framedemo.a.ta.append("-->查询出错\n");x.printstacktrace();} addinformation.this.dispose(); } if(x==11){ //按学生借书记录查询 string sql="select bookid,stdid,date from bs where stdid=?"; resultset rst=null; try( connection conn=getconnection(); preparedstatement stmt=conn.preparestatement(sql)){ stmt.setint(1, integer.parseint(jtf1.gettext())); rst=stmt.executequery(); calendar calendar =new gregoriancalendar(); if(rst.next()){ framedemo.a.ta.append("----------------------------------------------------\n"); framedemo.a.ta.append("\t图书编号\t学生学号\t借书时间\t\t应还时间\n"); date x=rst.getdate(3); calendar.settime(x); calendar.add(calendar.date, 30); java.util.date utildate = (java.util.date)calendar.gettime(); utildate = (java.util.date)calendar.gettime(); date newdate =new date(utildate.gettime()); framedemo.a.ta.append("\t"+rst.getint(1)+"\t"+rst.getint(2)+"\t"+x+"\t"+newdate+"\n"); while(rst.next()){ x=rst.getdate(3); calendar.settime(x); calendar.add(calendar.date, 30); utildate = (java.util.date)calendar.gettime(); utildate = (java.util.date)calendar.gettime(); newdate =new date(utildate.gettime()); framedemo.a.ta.append("\t"+rst.getint(1)+"\t"+rst.getint(2)+"\t"+x+"\t"+newdate+"\n"); } framedemo.a.ta.append("----------------------------------------------------\n"); } else{ framedemo.a.ta.append("-->查询出错\n"); joptionpane.showmessagedialog(null, "不存在该借书记录！","警告",joptionpane.warning_message); } }catch(exception x){framedemo.a.ta.append("-->查询出错\n");x.printstacktrace();} addinformation.this.dispose(); } if(x==12){ //查询学生信息 string sql="select * from std where id=?"; resultset rst=null; try( connection conn=getconnection(); preparedstatement stmt=conn.preparestatement(sql)){ stmt.setint(1, integer.parseint(jtf1.gettext())); rst=stmt.executequery(); if(rst.next()){ framedemo.a.ta.append("---------------------------------------\n"); framedemo.a.ta.append("\t学生学号\t学生姓名\t\n"); framedemo.a.ta.append("\t"+rst.getint(1)+"\t"+rst.getstring(2)+"\n"); framedemo.a.ta.append("---------------------------------------\n"); } else{ framedemo.a.ta.append("-->查询出错\n"); joptionpane.showmessagedialog(null, "不存在该学生！","警告",joptionpane.warning_message); } }catch(exception x){framedemo.a.ta.append("-->查询出错\n");x.printstacktrace();} addinformation.this.dispose(); } } if(ae.getsource()==quxiao){ addinformation.this.dispose(); framedemo.a.ta.append("-->操作取消\n"); } }} |
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服务器之家。
原文链接：http://blog.csdn.net/qq_28929579/article/details/53562552
