189 8069 5689
查询语句是要写在xml文件中的，如select * from table_name where id = #{id}，#{id}表示取值。比如你在前台传来一个id，在后台接收到这个id，然后通过方法findById(String id)去查，此时#{id}，取的就是这个id值
目前成都创新互联公司已为上千家的企业提供了网站建设、域名、网页空间、网站托管、服务器托管、企业网站设计、东川网站维护等服务，公司将坚持客户导向、应用为本的策略，正道将秉承"和谐、参与、激情"的文化，与客户和合作伙伴齐心协力一起成长，共同发展。
1. java2s
这个网站非常好，分成三大类，分别是Example 、Products 、 Articles ，每个大类下又分别设许多小类，还有搜索功能，这样查找起来非常方便。。比如，如果要学习SWT/JFace，只要把Example下的SWT JFace Eclipse 研究一下也就可以了。另外，这个网站还有JavaScript DHTML 、 C# / C Sharp 、 C / ANSI-C 、 SQL / MySQL 等类。总之，非常好。
2. codeZoo
这是O'Reily旗下的，除了Java之外，还有Ruby、Python。
3. Java学习源代码检索系统
难得看见国产的，好歹也要支持一下，分类也算清楚。
4. Koders
是个综合查询的网站，不过它好像是从代码中查找关键词，包含的语言挺多的。
5. Resources for Java server-side developers
确切的说，它是一个资源收集的网站，代码查询并不多。不过它分类相当细，如Articles、Books、Examples、Extensions、Frameworks等类，你可以输入Spring或Hibernate作为关键词搜索一下看看。
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package test;
import java.sql.*;
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
import javax.swing.border.*;
import javax.swing.JOptionPane;
class Add extends Panel implements ActionListener{
Connection con;
Statement sql;
Button b1,b2;
TextField tf1,tf2,tf3,tf4,tf5,tf6;
Box baseBox,bv1,bv2;
Add(){
try{
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
}
catch(ClassNotFoundException e){}
try{
con=DriverManager.getConnection("jdbc:odbc:data","","");
sql=con.createStatement();
}
catch(SQLException ee){}
setLayout(new BorderLayout());
Panel p1=new Panel();
Panel p2=new Panel();
tf1=new TextField(16);
tf2=new TextField(16);
tf3=new TextField(16);
tf4=new TextField(16);
tf5=new TextField(16);
tf6=new TextField(16);
b1=new Button("录入");
b1.setBackground(Color.green);
b2=new Button("重置");
b2.setBackground(Color.green);
b1.addActionListener(this);
b2.addActionListener(this);
p1.add(b1);
p1.add(b2);
bv1=Box.createVerticalBox();
bv1.add(new Label("学号"));
bv1.add(Box.createVerticalStrut(8));
bv1.add(new Label("姓名"));
bv1.add(Box.createVerticalStrut(8));
bv1.add(new Label("性别"));
bv1.add(Box.createVerticalStrut(8));
bv1.add(new Label("专业"));
bv1.add(Box.createVerticalStrut(8));
bv1.add(new Label("年级"));
bv1.add(Box.createVerticalStrut(8));
bv1.add(new Label("出生"));
bv1.add(Box.createVerticalStrut(8));
bv2=Box.createVerticalBox();
bv2.add(tf1);
bv2.add(Box.createVerticalStrut(8));
bv2.add(tf2);
bv2.add(Box.createVerticalStrut(8));
bv2.add(tf3);
bv2.add(Box.createVerticalStrut(8));
bv2.add(tf4);
bv2.add(Box.createVerticalStrut(8));
bv2.add(tf5);
bv2.add(Box.createVerticalStrut(8));
bv2.add(tf6);
bv2.add(Box.createVerticalStrut(8));
baseBox=Box.createHorizontalBox();
baseBox.add(bv1);
baseBox.add(Box.createHorizontalStrut(10));
baseBox.add(bv2);
p2.add(baseBox);
add(p1,"South");
add(p2,"Center");
setSize(350,300);
setBackground(Color.pink);
}
public void actionPerformed(ActionEvent e){
if(e.getSource()==b1){
try{ insert();}
catch(SQLException ee){}
JOptionPane.showMessageDialog(this,"数据已入库!","提示对话框",JOptionPane.INFORMATION_MESSAGE);
}
else if(e.getSource()==b2){
tf1.setText(" ");
tf2.setText(" ");
tf3.setText(" ");
tf4.setText(" ");
tf5.setText(" ");
tf6.setText(" ");
}
}
public void insert() throws SQLException{
String s1="'"+tf1.getText().trim()+"'";
String s2="'"+tf2.getText().trim()+"'";
String s3="'"+tf3.getText().trim()+"'";
String s4="'"+tf4.getText().trim()+"'";
String s5="'"+tf5.getText().trim()+"'";
String s6="'"+tf6.getText().trim()+"'";
String temp="INSERT INTO jesse VALUES ("+s1+","+s2+","+s3+","+s4+","+s5+","+s6+")";
con=DriverManager.getConnection("jdbc:odbc:data","","");
sql.executeQuery(temp);
con.close();
}
}
class Query extends Panel implements ActionListener{
Connection con;
Statement sql;
TextField t1,t2,t3,t4,t5,t6;
Button b;
Box baseBox,bv1,bv2;
int flag=0;
Query(){
try{
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
}
catch(ClassNotFoundException e){}
try{
con=DriverManager.getConnection("jdbc:odbc:data","","");
sql=con.createStatement();
}
catch(SQLException ee){}
setLayout(new BorderLayout());
b=new Button("查询");
b.setBackground(Color.orange);
b.addActionListener(this);
t1=new TextField(8);
t2=new TextField(16);
t3=new TextField(16);
t4=new TextField(16);
t5=new TextField(16);
t6=new TextField(16);
t2.setEditable(false);
t3.setEditable(false);
t4.setEditable(false);
t5.setEditable(false);
t6.setEditable(false);
Panel p1=new Panel(),p2=new Panel();
p1.add(new Label("输入要查询的学号"));
p1.add(t1);
p1.add(b);
bv1=Box.createVerticalBox();
bv1.add(new Label("姓名"));
bv1.add(Box.createVerticalStrut(8));
bv1.add(new Label("性别"));
bv1.add(Box.createVerticalStrut(8));
bv1.add(new Label("专业"));
bv1.add(Box.createVerticalStrut(8));
bv1.add(new Label("年级"));
bv1.add(Box.createVerticalStrut(8));
bv1.add(new Label("出生"));
bv1.add(Box.createVerticalStrut(8));
bv2=Box.createVerticalBox();
bv2.add(t2);
bv2.add(Box.createVerticalStrut(8));
bv2.add(t3);
bv2.add(Box.createVerticalStrut(8));
bv2.add(t4);
bv2.add(Box.createVerticalStrut(8));
bv2.add(t5);
bv2.add(Box.createVerticalStrut(8));
bv2.add(t6);
bv2.add(Box.createVerticalStrut(8));
baseBox=Box.createHorizontalBox();
baseBox.add(bv1);
baseBox.add(Box.createHorizontalStrut(10));
baseBox.add(bv2);
p2.add(baseBox);
add(p1,"North");
add(p2,"Center");
setSize(300,250);
setBackground(Color.red);
}
public void actionPerformed(ActionEvent e){
flag=0;
try{query();}
catch(SQLException ee){}
}
public void query() throws SQLException{
String num,name,sex,subject,grade,born;
con=DriverManager.getConnection("jdbc:odbc:data","","");
ResultSet rs=sql.executeQuery("SELECT * FROM jesse ");
while(rs.next()){
num=rs.getString("学号");
name=rs.getString("姓名");
sex=rs.getString("性别");
subject=rs.getString("专业");
grade=rs.getString("年级");
born=rs.getString("出生");
if(num.equals(t1.getText().trim())){
t2.setText(name);
t3.setText(sex);
t4.setText(subject);
t5.setText(grade);
t6.setText(born);
flag=1;
break;
}
}
con.close();
if(flag==0){t1.setText("没有该学生");}
}
}
class Update extends Panel implements ActionListener{
Connection con;
Statement sql;
Button b1,b2,b3;
Box baseBox,bv1,bv2;
TextField t1,t2,t3,t4,t5,t6;
Update(){
try{
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
}
catch(ClassNotFoundException e){}
try{
con=DriverManager.getConnection("jdbc:odbc:data","","");
sql=con.createStatement();
}
catch(SQLException ee){}
setLayout(new BorderLayout());
b1=new Button("开始修改");
b1.setBackground(Color.green);
b2=new Button("录入修改");
b2.setBackground(Color.yellow);
b3=new Button("重置");
b3.setBackground(Color.yellow);
b1.addActionListener(this);
b2.addActionListener(this);
b3.addActionListener(this);
t1=new TextField(8);
t2=new TextField(16);
t3=new TextField(16);
t4=new TextField(16);
t5=new TextField(16);
t6=new TextField(16);
Panel p1=new Panel(),p2=new Panel(),p3=new Panel();
p1.add(new Label("输入要修改信息的学号"));
p1.add(t1);
p1.add(b1);
bv1=Box.createVerticalBox();
bv1.add(new Label("(新)姓名"));
bv1.add(Box.createVerticalStrut(8));
bv1.add(new Label("(新)性别"));
bv1.add(Box.createVerticalStrut(8));
bv1.add(new Label("(新)专业"));
bv1.add(Box.createVerticalStrut(8));
bv1.add(new Label("(新)年级"));
bv1.add(Box.createVerticalStrut(8));
bv1.add(new Label("(新)出生"));
bv1.add(Box.createVerticalStrut(8));
bv2=Box.createVerticalBox();
bv2.add(t2);
bv2.add(Box.createVerticalStrut(8));
bv2.add(t3);
bv2.add(Box.createVerticalStrut(8));
bv2.add(t4);
bv2.add(Box.createVerticalStrut(8));
bv2.add(t5);
bv2.add(Box.createVerticalStrut(8));
bv2.add(t6);
bv2.add(Box.createVerticalStrut(8));
baseBox=Box.createHorizontalBox();
baseBox.add(bv1);
baseBox.add(Box.createHorizontalStrut(10));
baseBox.add(bv2);
p2.add(baseBox);
p3.add(b2);
p3.add(b3);
add(p1,"North");
add(p2,"Center");
add(p3,"South");
setSize(300,250);
setBackground(Color.cyan);
}
public void actionPerformed(ActionEvent e){
if(e.getSource()==b1){
try{
String num,name,sex,subject,grade,born;
con=DriverManager.getConnection("jdbc:odbc:data","","");
ResultSet rs=sql.executeQuery("SELECT * FROM jesse ");
while(rs.next()){
num=rs.getString("学号");
name=rs.getString("姓名");
sex=rs.getString("性别");
subject=rs.getString("专业");
grade=rs.getString("年级");
born=rs.getString("出生");
if(num.equals(t1.getText().trim())){
t2.setText(name);
t3.setText(sex);
t4.setText(subject);
t5.setText(grade);
t6.setText(born);
break;
}
}
con.close();
}
catch(SQLException ee){}
}
if(e.getSource()==b2){
try{update();}
catch(SQLException ee){}
}
if(e.getSource()==b3){
t2.setText(" ");
t3.setText(" ");
t4.setText(" ");
t5.setText(" ");
t6.setText(" ");
}
}
public void update() throws SQLException{
String s1="'"+t1.getText().trim()+"'";
String s2="'"+t2.getText().trim()+"'";
String s3="'"+t3.getText().trim()+"'";
String s4="'"+t4.getText().trim()+"'";
String s5="'"+t5.getText().trim()+"'";
String s6="'"+t6.getText().trim()+"'";
String temp="UPDATE jesse SET 姓名 ="+s2+", 性别="+s3+", 专业="+s4+", 年级="+s5+", 出生="+s6+" WHERE 学号="+s1;
con=DriverManager.getConnection("jdbc:odbc:data","","");
sql.executeQuery(temp);
con.close();
}
}
class Delete extends Panel implements ActionListener{
Connection con;
Statement sql;
TextField t1,t2,t3,t4,t5,t6;
Button b;
Box baseBox,bv1,bv2;
Delete(){
try{
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
}
catch(ClassNotFoundException e){}
try{
con=DriverManager.getConnection("jdbc:odbc:data","","");
sql=con.createStatement();
}
catch(SQLException ee){}
setLayout(new BorderLayout());
b=new Button("删除");
b.setBackground(Color.cyan);
b.addActionListener(this);
t1=new TextField(8);
t1.addActionListener(this);
t2=new TextField(16);
t3=new TextField(16);
t4=new TextField(16);
t5=new TextField(16);
t6=new TextField(16);
t2.setEditable(false);
t3.setEditable(false);
t4.setEditable(false);
t5.setEditable(false);
t6.setEditable(false);
Panel p1=new Panel(),p2=new Panel();
p1.add(new Label("输入要删除的学号"));
p1.add(t1);
p1.add(b);
bv1=Box.createVerticalBox();
bv1.add(new Label("姓名"));
bv1.add(Box.createVerticalStrut(8));
bv1.add(new Label("性别"));
bv1.add(Box.createVerticalStrut(8));
bv1.add(new Label("专业"));
bv1.add(Box.createVerticalStrut(8));
bv1.add(new Label("年级"));
bv1.add(Box.createVerticalStrut(8));
bv1.add(new Label("出生"));
bv1.add(Box.createVerticalStrut(8));
bv2=Box.createVerticalBox();
bv2.add(t2);
bv2.add(Box.createVerticalStrut(8));
bv2.add(t3);
bv2.add(Box.createVerticalStrut(8));
bv2.add(t4);
bv2.add(Box.createVerticalStrut(8));
bv2.add(t5);
bv2.add(Box.createVerticalStrut(8));
bv2.add(t6);
bv2.add(Box.createVerticalStrut(8));
baseBox=Box.createHorizontalBox();
baseBox.add(bv1);
baseBox.add(Box.createHorizontalStrut(10));
baseBox.add(bv2);
p2.add(baseBox);
add(p1,"North");
add(p2,"Center");
setSize(300,250);
setBackground(Color.green);
}
public void actionPerformed(ActionEvent e){
if(e.getSource()==t1){
try{delete();}
catch(SQLException ee){}
}
else if(e.getSource()==b){
int n=JOptionPane.showConfirmDialog(this,"确定要删除该学号及全部信息吗?","确定",JOptionPane.YES_NO_OPTION);
if(n==JOptionPane.YES_OPTION){
try{
String s1="'"+t1.getText().trim()+"'";
String temp="DELETE FROM jesse WHERE 学号="+s1;
con=DriverManager.getConnection("jdbc:odbc:data","","");
sql.executeUpdate(temp);
con.close();
}
catch(SQLException ee){}
}
else if(n==JOptionPane.NO_OPTION){}
}
}
public void delete() throws SQLException{
String num,name,sex,subject,grade,born;
con=DriverManager.getConnection("jdbc:odbc:data","","");
ResultSet rs=sql.executeQuery("SELECT * FROM jesse ");
while(rs.next()){
num=rs.getString("学号");
name=rs.getString("姓名");
sex=rs.getString("性别");
subject=rs.getString("专业");
grade=rs.getString("年级");
born=rs.getString("出生");
if(num.equals(t1.getText().trim())){
t2.setText(name);
t3.setText(sex);
t4.setText(subject);
t5.setText(grade);
t6.setText(born);
break;
}
}
con.close();
}
}
public class tyj extends Frame implements ActionListener{
MenuBar bar=null;
Menu menu1,menu2,menu3,menu4,menu5;
MenuItem item1,item2,item3,item4,item5;
Add zengjia;
Query chaxun;
Update gengxin;
Delete shanchu;
tyj(){
super("欢迎进入学生信息管理系统");
zengjia=new Add();
chaxun=new Query();
gengxin=new Update();
shanchu=new Delete();
bar=new MenuBar();
menu1=new Menu("信息录入");
menu2=new Menu("信息查询");
menu3=new Menu("信息更新");
menu4=new Menu("信息删除");
menu5=new Menu("退出系统");
item1=new MenuItem("录入");
item2=new MenuItem("查询");
item3=new MenuItem("更新");
item4=new MenuItem("删除");
item5=new MenuItem("退出");
menu1.add(item1);
menu2.add(item2);
menu3.add(item3);
menu4.add(item4);
menu5.add(item5);
bar.add(menu1);
bar.add(menu2);
bar.add(menu3);
bar.add(menu4);
bar.add(menu5);
setMenuBar(bar);
item1.addActionListener(this);
item2.addActionListener(this);
item3.addActionListener(this);
item4.addActionListener(this);
item5.addActionListener(this);
Label label=new Label("欢迎进入学生信息管理系统",Label.CENTER);
String s=" ";
Font f=new Font(s,Font.BOLD,22);
label.setFont(f);
label.setBackground(Color.GREEN);
label.setForeground(Color.BLUE);
add(label,"Center");
setVisible(true);
setSize(320,300);
}
public void actionPerformed(ActionEvent e){
if(e.getSource()==item1){
removeAll();
add(zengjia,"Center");
validate();
}
if(e.getSource()==item2){
removeAll();
add(chaxun,"Center");
validate();
}
if(e.getSource()==item3){
removeAll();
add(gengxin,"Center");
validate();
}
if(e.getSource()==item4){
removeAll();
add(shanchu,"Center");
validate();
}
if(e.getSource()==item5){
removeAll();
setBackground(Color.GREEN);
Label label=new Label("欢迎进入学生信息管理系统",Label.CENTER);
String s=" ";
Font f=new Font(s,Font.BOLD,22);
label.setFont(f);
label.setForeground(Color.BLUE);
add(label,"Center");
validate();
}
}
public static void main(String[] args)
{
tyj jesse=new tyj();
jesse.setVisible(true);
jesse.addWindowListener(new WindowAdapter(){
public void windowClosing(WindowEvent e){
System.exit(0);
}
});
}
}
import java.sql.Connection。
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.NamingException;
import javax.sql.DataSource;
public class DBCon {
//数据库驱动对象
public static final String DRIVER="oracle.jdbc.driver.OracleDriver";
//数据库连接地址(数据库名)
public static final String URL="jdbc:oracle:thin:@localhost:1521:orcl";
//登陆名
public static final String USER="FM";
//登陆密码
public static final String PWD="FM";
//创建数据库连接对象
private Connection con=null;
//创建数据库预编译对象
private PreparedStatement ps=null;
//创建结果集
private ResultSet rs=null;
//创建数据源对象
public static DataSource source=null;
// //静态代码块
// static{
//
// //初始化配置文件context
// try {
// Context context=new InitialContext();
// source=(DataSource)context.lookup("java:comp/env/jdbc/webmessage");
// } catch (Exception e) {
// // TODO Auto-generated catch block
// e.printStackTrace();
// }
//
//
// }
/**
* 获取数据库连接
*/
public Connection getCon(){
try {
Class.forName(DRIVER);
} catch (ClassNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
try {
con=DriverManager.getConnection(URL,USER,PWD);
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return con;
}
// /**
// * 获取数据库连接
// */
// public Connection getCon(){
//
// try {
// con=source.getConnection();
// } catch (SQLException e) {
// // TODO Auto-generated catch block
// e.printStackTrace();
// }
//
// return con;
// }
/**
* 关闭所有资源
*/
public void closeAll(){
if(rs!=null)
try {
rs.close();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
if(ps!=null)
try {
ps.close();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
if(con!=null)
try {
con.close();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
/**
* @param sql数据库更新(增、删、改) 语句
* @param pras参数列表（可传，可不传，不传为NULL，以数组形式存在）
* @return 返回受影响都行数
*/
public int update(String sql,String... pras){
int resu=0;
con=getCon();
try {
ps=con.prepareStatement(sql);
for(int i=0;ipras.length;i++){
ps.setString(i+1,pras[i]);
}
resu=ps.executeUpdate();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
finally{
closeAll();
}
return resu;
}
/**
* @param sql数据库查询语句
* @param pras参数列表（可传，可不传，不传为NULL，以数组形式存在）
* @return 返回结果集
*/
public ResultSet query(String sql,String... pras){
con=getCon();
try {
ps=con.prepareStatement(sql);
if(pras!=null)
for(int i=0;ipras.length;i++){
ps.setString(i+1, pras[i]);
}
rs=ps.executeQuery();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return rs;
}
}