数据库java操作

1.提取单条记录
//import java.sql.*;
Connection con=null;
Statement stmt=null;
ResultSet %%6=null;
try {
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
String url="jdbc:odbc:"+%%1;
con=DriverManager.getConnection(url,%%2,%%3);
stmt=con.createStatement();
stmt.executeUpdate(%%4);
%%6=stmt.executeQuery(%%5);
%%7
}catch(Exception e){
e.printStackTrace();
}finally{
try {
try {
stmt.close();
con.close();
} catch (SQLException e) {
e.printStackTrace();
}
} catch (Exception e) {
e.printStackTrace();
}
}

2.单值比较
//import java.sql.*;
ResultSet rs;
String strurl="jdbc:odbc:%%1";
Connection con=NULL;
Statement stmt=null;
try {
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
con=DriverManager.getConnection(url,%%2,%%3);
stmt=con.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE,ResultSet.CONCUR_UPDATABLE);
rs=stmt.executeQuery(%%2);
rs.next();
int %%3=rs.getInt("%%3");
if(%%3==%%4)
{
%%5
}
}
catch (Exception e) {
e.printStackTrace();
}
finally{
try {
if(rs!=null)
{
rs.close();
stmt.close();
con.close();
} catch (Exception e) {
e.printStackTrace();
}
}

3.显示表格
//import java.awt.*;
//import javax.swing.*;
//import java.sql.*;
//import javax.swing.table.*;
String[] colHeads=%%4;
Connection con=null;
Statement stmt=null;
ResultSet %%6=null;
try {
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
String url="jdbc:odbc:"+%%1;
con=DriverManager.getConnection(url,%%2,%%3);
stmt=con.createStatement();
%%6=stmt.executeQuery("SELECT count(*) as au_count from "+%%5);
%%6.next();
int iCount=rs.getInt("au_count");
Object[][] data=new Object[iCount][];
int i=0;
%%6=stmt.executeQuery("SELECT * from "+%%5);
while(%%6.next()){
data[i]=new Object[iCount];
data[i][0]=%%6.getString("au_fname");
data[i][1]=%%6.getString("Phone");
data[i][2]=%%6.getString("City");
i++;
}
JTable table=new JTable(data,colHeads);
JScrollPane jsp=new JScrollPane(table);
getContentPane().add(jsp);
}catch(Exception e){
e.printStackTrace();
}
finally{
if(con!=null){
try {
%%6.close();
stmt.close();
con.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
}

4.操作表格
//import java.awt.*;
//import java.swing.*;
//import java.sql.*;
//import javax.swing.table.*;
JTable table;
Object[][] data;
JButton jb;
JScrollPane jsp;
JComboBox jcb;
JCheckBox jchb;
jcb=new JComboBox();
jchb=new JCheckBox();
jcb.addItem("男");
jcb.addItem("女");
jb = new JButton("dsfasd");
String[] colHeads = { "id", "性别","是否" };
Connection con = null;
Statement stmt = null;
ResultSet rs = null;
try {
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
String url = "jdbc:odbc:ghost";
con = DriverManager.getConnection(url);
stmt = con.createStatement();
rs = stmt.executeQuery("SELECT count(id) as count from AUTHORS");
rs.next();
int iCount = rs.getInt("count");
data = new Object[iCount][];
int i = 0;
rs = stmt.executeQuery("SELECT * from AUTHORS");
while (rs.next()) {
data[i] = new Object[iCount];
data[i][0] = rs.getString("id");
data[i][1] = rs.getString("gender");
data[i][2] = rs.getString("isMember");
i++;
}
table = new JTable();
DefaultTableModel dt = new DefaultTableModel(data, colHeads); //
table.setModel(dt);
jsp = new JScrollPane(table);
getContentPane().add(jsp, BorderLayout.CENTER);
TableColumn tc = table.getColumn("性别");
TableColumn tc2=table.getColumn("是否");
tc.setCellEditor(new DefaultCellEditor(jcb));
tc2.setCellEditor(new DefaultCellEditor(jchb));
} catch (Exception e) {
e.printStackTrace();
} finally {
if (con != null) {
try {
rs.close();
stmt.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
}
this.setSize(300, 300);
this.setLocation(200, 210);
JPanel jp2 = new JPanel();
this.getContentPane().add(jp2, BorderLayout.NORTH);
JPanel jp = new JPanel();
jp2.add(jp);
jp.add(new JTextField(10));
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
this.setVisible(true);

 

5.数值范围查询
//import java.sql.*;
Connection con;
Statement stmt;
ResultSet rs;
int min = Integer.parseInt(jcb1.getSelectedItem().toString());
int max = Integer.parseInt(jcb2.getSelectedItem().toString());
String sql = "select count(*) as pro_count from ProPrice where price between "
+ min + " and " + max;
try {
con = DriverManager.getConnection(url);
stmt = con.createStatement();
rs = stmt.executeQuery(sql);
rs.next();
int iCount = rs.getInt("pro_count");
Object[][] data = new Object[iCount][];
rs = stmt.executeQuery("select * from ProPrice where price between "
+ min + " and " + max);
int i = 0;
while (rs.next()) {
data[i] = new Object[3];
data[i][0] = rs.getString("id");
data[i][1] = rs.getString("name");
data[i][2] = rs.getString("price");
i++;
}
DefaultTableModel dt = new DefaultTableModel(data, colHeads);
table.setModel(dt);
} catch (Exception e1) {
e1.printStackTrace();
} finally {
try {
rs.close();
con.close();
stmt.close();
} catch (SQLException e1) {
e1.printStackTrace();
}
}

6.关闭时关闭连接
//import java.sql.*;
addWindowListener(new WindowAdapter{
public void windowClosing(WindowEvent wevent){
if(stmt!=null){
try {
stmt.close();
con.close();
} catch (Exception e) {
e.printStackTrace();
}
}
}

7.执行命令
//import java.sql.*;
Connection conn;
PreparedStatement pst=null;
try {
conn=DriverManager.getConnection(url);
pst=conn.prepareStatement("Insert Into grade(%%1) Values (?)");
pst.setInt(1,%%2);
//pst.setInt(2,%%2);
pst.addBatch();
pst.executeBatch();
} catch (SQLException e){
e.printStackTrace();
}
finally{
pst.close();
conn.close();
}

8.Oracle8/8i/9i数据库（thin模式）
//import java.sql.*;
Class.forName("oracle.jdbc.driver.OracleDriver").newInstance(); 
String url="jdbc:oracle:thin:@localhost:1521:orcl"; //orcl为数据库的SID 
String user="test"; 
String password="test"; 
Connection conn= DriverManager.getConnection(url,user,password);  
Statement stmtNew=conn.createStatement();

9.DB2数据库
//import java.sql.*;
Class.forName("com.ibm.db2.jdbc.app.DB2Driver ").newInstance(); 
String url="jdbc:db2://localhost:5000/sample"; //sample为你的数据库名 
String user="admin"; 
String password=""; 
Connection conn= DriverManager.getConnection(url,user,password);  
Statement stmtNew=conn.createStatement();

10.Sql Server7.0/2000数据库
//import java.sql.*;
Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver").newInstance(); 
//String url="jdbc:microsoft:sqlserver://localhost:1433;DatabaseName=db2"; //7.0、2000
String url="jdbc:sqlserver://localhost:1433;DatabaseName=db2"; //2005
//db2为数据库名
String user="sa"; 
String password=""; 
Connection conn= DriverManager.getConnection(url,user,password);  
Statement stmtNew=conn.createStatement();

11.Sybase数据库
//import java.sql.*;
Class.forName("com.sybase.jdbc.SybDriver").newInstance(); 
String url =" jdbc:sybase:Tds:localhost:5007/myDB";//myDB为你的数据库名 
Properties sysProps = System.getProperties(); 
SysProps.put("user","userid"); 
SysProps.put("password","user_password"); 
Connection conn= DriverManager.getConnection(url, SysProps);  
Statement stmtNew=conn.createStatement();

12.Informix数据库
//import java.sql.*;
Class.forName("com.informix.jdbc.IfxDriver").newInstance(); 
String url = "jdbc:informix-sqli://123.45.67.89:1533/myDB:INFORMIXSERVER=myserver; 
user=testuser;password=testpassword"; //myDB为数据库名 
Connection conn= DriverManager.getConnection(url);  
Statement stmtNew=conn.createStatement();

13.MySQL数据库
//import java.sql.*;
//Class.forName("org.gjt.mm.mysql.Driver").newInstance();
Class.forName("com.mysql.jdbc.Driver");
//String url ="jdbc:mysql://localhost/myDB?user=soft&password=soft1234&useUnicode=true&characterEncoding=8859_1";
String url ="jdbc:mysql://localhost:3306/myDB";
//myDB为数据库名 
Connection conn= DriverManager.getConnection(url,"root","root");  
Statement stmtNew=conn.createStatement();

14.PostgreSQL数据库
//import java.sql.*;
Class.forName("org.postgresql.Driver").newInstance();
String url ="jdbc:postgresql://localhost/myDB" //myDB为数据库名
String user="myuser";
String password="mypassword";
Connection conn= DriverManager.getConnection(url,user,password);
Statement stmtNew=conn.createStatement();

15.access数据库直连用ODBC的
//import java.sql.*;
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver") ; 
String url="jdbc:odbc:Driver={MicroSoft Access Driver (*.mdb)};DBQ="+application.getRealPath("/Data/ReportDemo.mdb"); 
Connection conn = DriverManager.getConnection(url,"sa",""); 
Statement stmtNew=conn.createStatement();

16.程序计时
long time1=System.currentTimeMillis();
long time2=System.currentTimeMillis();
long interval=time2-time1;

17.延时
try {
Thread.sleep(Integer.Parse(%%1));
} catch(InterruptedException e) {
e.printStackTrace();
}

18.连接Excel文件
//import java.sql.*;
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
String url = "jdbc:odbc:driver={Microsoft Excel Driver (*.xls)};DBQ=D:\\myDB.xls"; // 不设置数据源
String user="myuser";
String password="mypassword";
Connection conn= DriverManager.getConnection(url,user,password);
Statement stmtNew=conn.createStatement();