java源码网？java开发ai工具
其实java源码网的问题并不复杂，但是又很多的朋友都不太了解java开发ai工具，因此呢，今天小编就来为大家分享java源码网的一些知识，希望可以帮助到大家，下面我们一起来看看这个问题的分析吧！
求Java web增删改查 极简源码
//用户新增
publicbooleanaddUser(Usersuser){
try{
conn=ConnDB.getConnection();
Stringsql="insertintotb_usersvalues(default,?,?,?,?,?,?)";
System.out.println(sql);
ps=conn.prepareStatement(sql);
ps.setInt(1,user.getDepID());
ps.setString(2,user.getUserName());
ps.setString(3,user.getUserPwd());
ps.setString(4,user.getUserCode());
ps.setString(5,user.getUserSex());
ps.setInt(6,user.getUserAge());
if(ps.executeUpdate()==1){
returntrue;
}
}catch(Exceptione){
e.printStackTrace();
}finally{//关闭当前页打开的相关对象
ConnDB.close(conn,ps,null);
}
returnfalse;
}
//用户删除
publicbooleandelUser(intid){
try{
conn=ConnDB.getConnection();
Stringsql="deletefromtb_userswhereid=?";
System.out.println(sql);
ps=conn.prepareStatement(sql);
ps.setInt(1,id);
if(ps.executeUpdate()==1){
returntrue;
}
}catch(Exceptione){
e.printStackTrace();
}finally{//关闭当前页打开的相关对象
ConnDB.close(conn,ps,null);
}
returnfalse;
}
//用户编辑
publicbooleanupdateUser(Usersuser){
try{
conn=ConnDB.getConnection();
Stringsql="updatetb_userssetdepID=?,userName=?,userPwd=?,userCode=?,userSex=?,userAge=?whereid=?";
System.out.println(user.getDepID()+user.getUserName()+user.getUserPwd()+user.getUserCode()+user.getUserSex()+user.getUserAge()+user.getId());
ps=conn.prepareStatement(sql);
ps.setInt(1,user.getDepID());
ps.setString(2,user.getUserName());
ps.setString(3,user.getUserPwd());
ps.setString(4,user.getUserCode());
ps.setString(5,user.getUserSex());
ps.setInt(6,user.getUserAge());
ps.setInt(7,user.getId());
if(ps.executeUpdate()==1){
returntrue;
}
}catch(Exceptione){
e.printStackTrace();
}finally{//关闭当前页打开的相关对象
ConnDB.close(conn,ps,null);
}
returnfalse;
}
//根据id查询用户
publicUsersfindAllUserById(intid){
Usersu=null;
DepDaodepd=null;
try{
conn=ConnDB.getConnection();
Stringsql="select*fromtb_userswhereid=?";
System.out.println(sql);
ps=conn.prepareStatement(sql);
ps.setInt(1,id);
rs=ps.executeQuery();
if(rs.next()){
depd=newDepDao();
Departmentdep=depd.findAllDepById(rs.getInt("depID"));
System.out.println(dep.getDepName());
u=newUsers();
u.setId(rs.getInt("id"));
u.setDepID(rs.getInt("depID"));
u.setUserName(rs.getString("userName"));
u.setUserPwd(rs.getString("userPwd"));
u.setUserCode(rs.getString("userCode"));
u.setUserSex(rs.getString("userSex"));
u.setUserAge(rs.getInt("userAge"));
u.setDep(dep);
}
}catch(Exceptione){
e.printStackTrace();
}finally{//关闭当前页打开的相关对象
ConnDB.close(conn,ps,rs);
}
returnu;
}这是我在dao层写的代码，都调用了ConnDB这个类，这个类完成了驱动的注册，及连接数据库的功能，代码如下：
packagecom.asjy.util;
importjava.sql.Connection;
importjava.sql.DriverManager;
importjava.sql.PreparedStatement;
importjava.sql.ResultSet;
importjava.sql.SQLException;
importjava.sql.Statement;
publicclassConnDB{
privatestaticStringurl="jdbc:mysql://localhost:3306/news";
privatestaticStringuser="root";
privatestaticStringpass="root";
//1.加载驱动
static{
try{
Class.forName("com.mysql.jdbc.Driver");
}catch(ClassNotFoundExceptione){
System.out.println("驱动加载失败");
}
}
//2.建立数据库连接对象
publicstaticConnectiongetConnection()throwsException{
returnDriverManager.getConnection(url,user,pass);
}
//3.关闭数据库
publicstaticvoidclose(Connectionconn,Statementps,ResultSetrs){
try{
if(rs!=null){
rs.close();
rs=null;
}
if(ps!=null){
ps.close();
ps=null;
}
if(conn!=null){
conn.close();
conn=null;
}
}catch(SQLExceptione){
e.printStackTrace();
}
}
}
有哪些可以下载java项目源码的网站
以下是可以下载Java项目源码的一些网站和实例：
特定项目源码网站：
直接下载页面：一些项目会在其官方网站或特定页面上提供源码下载链接，如jsp开发的博研图书馆后台管理系统、javaWeb图书馆管理系统源码mysql版本等。GitHub：
GitHub是一个开源代码托管平台，上面有许多Java项目的源码可以下载。例如：uboger/LibraryManager：JAVA GUI图书馆管理系统。wangzhengyi/TankWar：用J2SE写的坦克大战小游戏。FieldSoftHelloClyde/TetrisSwing：Swing编写的俄罗斯方块。其他开源社区和论坛：
在一些开源社区和论坛上，开发者会分享他们的Java项目源码。这些社区和论坛通常会有专门的版块用于源码分享和交流。教育机构和课程网站：
一些教育机构和课程网站会提供Java项目的源码作为教学资源。这些源码通常用于教学目的，帮助学生理解和学习Java编程。重点内容： GitHub是获取Java项目源码的重要平台，上面有丰富的开源项目和资源。除了GitHub，还可以关注一些开源社区、论坛以及教育机构和课程网站，以获取更多的Java项目源码和学习资源。
java小游戏源代码
介绍这个给你把...我空间还有很多..
importjava.applet.Applet;
importjava.applet.AudioClip;
importjava.awt.Dimension;
importjava.awt.Font;
importjava.awt.Toolkit;
importjavax.sound.sampled.AudioFileFormat;
importjavax.sound.sampled.AudioSystem;
importjavax.swing.JFrame;
importjavax.swing.JPanel;
importjava.awt.Rectangle;
importjavax.swing.BorderFactory;
importjavax.swing.JButton;
importjavax.swing.JOptionPane;
importjavax.swing.JSlider;
importjavax.swing.JLabel;
importjavax.swing.SwingUtilities;
importjavax.swing.UIManager;
importjavax.swing.event.ChangeEvent;
importjavax.swing.event.ChangeListener;
importjava.awt.event.ActionEvent;
importjava.awt.event.ActionListener;
importjava.awt.event.KeyAdapter;
importjava.awt.event.KeyEvent;
importjava.io.File;
importjava.util.Vector;
publicclassFrameextendsJFrameimplementsRunnable{
JPanelcontentPane;
JPaneljPanel1=newJPanel();
JButtonjButton1=newJButton();
JSliderjSlider1=newJSlider();
JLabeljLabel1=newJLabel();
JButtonjButton2=newJButton();
JLabeljLabel2=newJLabel();
intcount=1,rapidity=80;//count当前进行的个数,rapidity游标的位置
intzhengque=0,cuowu=0;
intrush[]={10,20,30};//游戏每关的个数可以自由添加.列{10,20,30,40,50}
intrush_count=0;//记录关数
charlist[]={'A','B','C','D','E','F','G','H','I','J','K','L',
'M','N','O','P','Q','R','S','T','U','V','W','X','Y',
'Z','1','2','3','4','5','6','7','8','9'};//随机出现的数字可以自由添加
Vectornumber=newVector();
Stringpaiduan="true";
AudioClipMusci_anjian,Music_shibai,Music_chenggong;
publicFrame(){
try{
setDefaultCloseOperation(EXIT_ON_CLOSE);
//-----------------声音文件---------------------
Musci_anjian=Applet.newAudioClip(newFile("sounds//anjian.wav")
.toURL());
Music_shibai=Applet.newAudioClip(newFile("sounds//shibai.wav")
.toURL());
Music_chenggong=Applet.newAudioClip(newFile(
"sounds//chenggong.wav").toURL());
//---------------------------------------
jbInit();
}catch(Exceptionexception){
exception.printStackTrace();
}
}
/**
*Componentinitialization.
*
*@throwsjava.lang.Exception
*/
privatevoidjbInit()throwsException{
contentPane=(JPanel)getContentPane();
contentPane.setLayout(null);
setSize(newDimension(588,530));
setTitle("FrameTitle");
jPanel1.setBorder(BorderFactory.createEtchedBorder());
jPanel1.setBounds(newRectangle(4,4,573,419));
jPanel1.setLayout(null);
jButton1.setBounds(newRectangle(277,442,89,31));
jButton1.setText("开始");
jButton1.addActionListener(newFrame1_jButton1_actionAdapter(this));
jSlider1.setBounds(newRectangle(83,448,164,21));
jSlider1.setMaximum(100);
jSlider1.setMinimum(1);
jSlider1.setValue(50);
jLabel1.setText("速度");
jLabel1.setBounds(newRectangle(35,451,39,18));
jButton2.setBounds(newRectangle(408,442,89,31));
jButton2.setText("结束");
jButton2.addActionListener(newFrame1_jButton2_actionAdapter(this));
jLabel2.setText("第一关:100个");
jLabel2.setBounds(newRectangle(414,473,171,21));
contentPane.add(jPanel1);
contentPane.add(jButton2);
contentPane.add(jButton1);
contentPane.add(jSlider1);
contentPane.add(jLabel1);
contentPane.add(jLabel2);
this.addKeyListener(newMyListener());
jButton1.addKeyListener(newMyListener());
jSlider1.addKeyListener(newMyListener());
jSlider1.addChangeListener(newChangeListener(){
publicvoidstateChanged(ChangeEvente){
rapidity=jSlider1.getValue();
}
});
}
publicvoidrun(){
number.clear();
zhengque=0;
cuowu=0;
paiduan="true";
while(count<=rush[rush_count]){
try{
Threadt=newThread(newTthread());
t.start();
count+=1;
Thread.sleep(1000+(int)(Math.random()*2000));//生产下组停顿时间
//最快1快.最慢2秒
}catch(InterruptedExceptione){
e.printStackTrace();
}
}
while(true){//等待最后一个字符消失
if(number.size()==0){
break;
}
}
if(zhengque==0){//为了以后相除..如果全部正确或者错误就会出现错误.所以..
zhengque=1;
}
if(cuowu==0){
cuowu=1;
}
if(paiduan.equals("true")){//判断是否是自然结束
if(zhengque/cuowu>=2){
JOptionPane.showMessageDialog(null,"恭喜你过关了");
rush_count+=1;//自动加1关
if(rush_count<rush.length){
if(rapidity>10){//当速度大于10的时候在-5提加速度.怕速度太快
rapidity-=5;//速度自动减10毫秒
jSlider1.setValue(rapidity);//选择位置
}
Threadt=newThread(this);
t.start();
}else{
JOptionPane.showMessageDialog(null,"牛B...你通关了..");
rush_count=0;
count=0;
}
}else{
JOptionPane.showMessageDialog(null,"请再接再励");
rush_count=0;
count=0;
}
}else{
rush_count=0;
count=0;
}
}
publicvoidjButton1_actionPerformed(ActionEvente){
Threadt=newThread(this);
t.start();
}
publicvoidjButton2_actionPerformed(ActionEvente){
count=rush[rush_count]+1;
paiduan="flase";
}
classTthreadimplementsRunnable{
publicvoidrun(){
booleanfo=true;
intY=0,X=0;
JLabelshow=newJLabel();
show.setFont(newjava.awt.Font("宋体",Font.PLAIN,33));
jPanel1.add(show);
X=10+(int)(Math.random()*400);
Stringparameter=list[(int)(Math.random()*list.length)]+"";
Beanbean=newBean();
bean.setParameter(parameter);
bean.setShow(show);
number.add(bean);
show.setText(parameter);
while(fo){
//---------------------数字下移--------------------
show.setBounds(newRectangle(X,Y+=2,33,33));
try{
Thread.sleep(rapidity);
}catch(InterruptedExceptione){
e.printStackTrace();
}
if(Y>=419){
fo=false;
for(inti=number.size()-1;i>=0;i--){
Beanbn=((Bean)number.get(i));
if(parameter.equalsIgnoreCase(bn.getParameter())){
cuowu+=1;
jLabel2.setText("正确:"+zhengque+"个,错误:"+cuowu
+"个");
number.removeElementAt(i);
Music_shibai.play();
break;
}
}
}
}
}
}
classMyListenerextendsKeyAdapter{
publicvoidkeyPressed(KeyEvente){
Stringuu=e.getKeyChar()+"";
for(inti=0;i<number.size();i++){
Beanbean=((Bean)number.get(i));
if(uu.equalsIgnoreCase(bean.getParameter())){
zhengque+=1;
number.removeElementAt(i);
bean.getShow().setVisible(false);
jLabel2.setText("正确:"+zhengque+"个,错误:"+cuowu+"个");
Music_chenggong.play();
break;
}
}
Musci_anjian.play();
}
}
publicstaticvoidmain(String[]args){
try{
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
}catch(Exceptionexception){
exception.printStackTrace();
}
Frameframe=newFrame();
DimensionscreenSize=Toolkit.getDefaultToolkit().getScreenSize();
DimensionframeSize=frame.getSize();
if(frameSize.height>screenSize.height){
frameSize.height=screenSize.height;
}
if(frameSize.width>screenSize.width){
frameSize.width=screenSize.width;
}
frame.setLocation((screenSize.width-frameSize.width)/2,
(screenSize.height-frameSize.height)/2);
frame.setVisible(true);
}
}
classFrame1_jButton2_actionAdapterimplementsActionListener{
privateFrameadaptee;
Frame1_jButton2_actionAdapter(Frameadaptee){
this.adaptee=adaptee;
}
publicvoidactionPerformed(ActionEvente){
adaptee.jButton2_actionPerformed(e);
}
}
classFrame1_jButton1_actionAdapterimplementsActionListener{
privateFrameadaptee;
Frame1_jButton1_actionAdapter(Frameadaptee){
this.adaptee=adaptee;
}
publicvoidactionPerformed(ActionEvente){
adaptee.jButton1_actionPerformed(e);
}
}
classBean{
Stringparameter=null;
JLabelshow=null;
publicJLabelgetShow(){
returnshow;
}
publicvoidsetShow(JLabelshow){
this.show=show;
}
publicStringgetParameter(){
returnparameter;
}
publicvoidsetParameter(Stringparameter){
this.parameter=parameter;
}
}
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