java获取ip地址
import java.awt.GridLayout; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.net.InetAddress; import java.net.UnknownHostException; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JPanel; import javax.swing.JTextField; public class ip extends JFrame implements ActionListener { private static final long serialVersionUID = 3339481369781127417L; JButton jb1; JButton jb2; JButton jb3; JPanel jp; JLabel jl; JLabel jl1; JTextField jt; public ip() { this.jp = new JPanel(); this.jl = new JLabel(); this.jl1 = new JLabel("您的域名:"); this.jb1 = new JButton("提交"); this.jb2 = new JButton("重置"); this.jb3 = new JButton("退出"); this.jt = new JTextField(20); this.jb1.addActionListener(this); this.jb2.addActionListener(this); this.jb3.addActionListener(this); this.jp.setLayout(new GridLayout(3, 2)); this.jp.add(this.jl1); this.jp.add(this.jt); this.jp.add(this.jb1); this.jp.add(this.jl); this.jp.add(this.jb2); this.jp.add(this.jb3); setBounds(200, 200, 500, 240); add(this.jp); setVisible(true); setDefaultCloseOperation(3); } public static void main(String[] args) { new ip(); } public void actionPerformed(ActionEvent e) { if (e.getSource() == this.jb1) { String url = this.jt.getText(); InetAddress ip = null; try { ip = InetAddress.getByName(url); } catch (UnknownHostException e1) { e1.printStackTrace(); } this.jl.setText(ip.toString()); } else if (e.getSource() == this.jb2) { this.jl.setText(""); this.jt.setText(""); } else { System.exit(0); } } }
java各种数据库连接:
1 MySQL: 2 String Driver="com.mysql.jdbc.Driver"; //驱动程序 3 String URL="jdbc:mysql://localhost:3306/db_name"; //连接的URL,db_name为数据库名 4 String Username="username"; //用户名 5 String Password="password"; //密码 6 Class.forName(Driver).new Instance(); 7 Connection con=DriverManager.getConnection(URL,Username,Password); 8 Microsoft SQL Server 2.0驱动(3个jar的那个): 9 String Driver="com.microsoft.jdbc.sqlserver.SQLServerDriver"; //连接SQL数据库的方法 10 String URL="jdbc:microsoft:sqlserver://localhost:1433;DatabaseName=db_name"; //db_name为数据库名 11 String Username="username"; //用户名 12 String Password="password"; //密码 13 Class.forName(Driver).new Instance(); //加载数据可驱动 14 Connection con=DriverManager.getConnection(URL,UserName,Password); // 15 Microsoft SQL Server 3.0驱动(1个jar的那个): // 老紫竹完善 16 String Driver="com.microsoft.sqlserver.jdbc.SQLServerDriver"; //连接SQL数据库的方法 17 String URL="jdbc:microsoft:sqlserver://localhost:1433;DatabaseName=db_name"; //db_name为数据库名 18 String Username="username"; //用户名 19 String Password="password"; //密码 20 Class.forName(Driver).new Instance(); //加载数据可驱动 21 Connection con=DriverManager.getConnection(URL,UserName,Password); // 22 Sysbase: 23 String Driver="com.sybase.jdbc.SybDriver"; //驱动程序 24 String URL="jdbc:Sysbase://localhost:5007/db_name"; //db_name为数据可名 25 String Username="username"; //用户名 26 String Password="password"; //密码 27 Class.forName(Driver).newInstance(); 28 Connection con=DriverManager.getConnection(URL,Username,Password); 29 Oracle(用thin模式): 30 String Driver="oracle.jdbc.driver.OracleDriver"; //连接数据库的方法 31 String URL="jdbc:oracle:thin:@loaclhost:1521:orcl"; //orcl为数据库的SID 32 String Username="username"; //用户名 33 String Password="password"; //密码 34 Class.forName(Driver).newInstance(); //加载数据库驱动 35 Connection con=DriverManager.getConnection(URL,Username,Password); 36 PostgreSQL: 37 String Driver="org.postgresql.Driver"; //连接数据库的方法 38 String URL="jdbc:postgresql://localhost/db_name"; //db_name为数据可名 39 String Username="username"; //用户名 40 String Password="password"; //密码 41 Class.forName(Driver).newInstance(); 42 Connection con=DriverManager.getConnection(URL,Username,Password); 43 DB2: 44 String Driver="com.ibm.db2.jdbc.app.DB2.Driver"; //连接具有DB2客户端的Provider实例 45 //String Driver="com.ibm.db2.jdbc.net.DB2.Driver"; //连接不具有DB2客户端的Provider实例 46 String URL="jdbc:db2://localhost:5000/db_name"; //db_name为数据可名 47 String Username="username"; //用户名 48 String Password="password"; //密码 49 Class.forName(Driver).newInstance(); 50 Connection con=DriverManager.getConnection(URL,Username,Password); 51 Informix: 52 String Driver="com.informix.jdbc.IfxDriver"; 53 String URL="jdbc:Informix-sqli://localhost:1533/db_name:INFORMIXSER=myserver"; //db_name为数据可名 54 String Username="username"; //用户名 55 String Password="password"; //密码 56 Class.forName(Driver).newInstance(); 57 Connection con=DriverManager.getConnection(URL,Username,Password); 58 JDBC-ODBC: 59 String Driver="sun.jdbc.odbc.JdbcOdbcDriver"; 60 String URL="jdbc:odbc:dbsource"; //dbsource为数据源名 61 String Username="username"; //用户名 62 String Password="password"; //密码 63 Class.forName(Driver).newInstance(); 64 Connection con=DriverManager.getConnection(URL,Username,Password);