JAVA实例100部-52 使用odbc连接数据库
import java.sql.*;
/**
*
Title: ODBCÁ??ÓÊý?Ý?â
*
Description: ??ʵÀýÑÝÊ?ÈçºÎÊ?ÓÃJDBC-ODBCÇÅ?Ù×?Êý?Ý?â??
*
Copyright: Copyright (c) 2003
*
Filename: odbcConn.java
* @author ?Å?,
* @version 1.0
*/
public class odbcConn{
private String url="";
private String username="";
private String password="";
/**
*
????˵Ã??º?ñµÃÊý?ÝÁ??Ó
*
ÊäÈë?ÎÊý?º
*
?µ?ØÀàÐÍ?ºConnection Á??Ó?ÔÏó
*/
public Connection conn(){
try {
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
Connection con = DriverManager.getConnection(url, username,
password);
return con;
}catch(SQLException sqle){
System.out.println("can't connection db:"+sqle);
return null;
} catch (Exception e) {
System.out.println("Failed to load JDBC/ODBC driver.");
return null;
}
}
/**
*
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*
ÊäÈë?ÎÊý?ºConnection con Êý?Ý?âÁ??Ó
*
ÊäÈë?ÎÊý?ºString sql ÒªÖ?ÐеÄSQLÓï?ä
*
?µ?ØÀàÐÍ?º
*/
public void query(Connection con, String sql){
try{
if(con==null) return;
Statement stmt = con.createStatement();
ResultSet rs = stmt.executeQuery(sql);
ResultSetMetaData rmeta = rs.getMetaData();
int numColumns = rmeta.getColumnCount();
while(rs.next())
{
for(int i = 0;i< numColumns;i++)
{
String sTemp = rs.getString(i+1);
System.out.print(sTemp+" ");
}
System.out.println("");
}
}catch(Exception e){
System.out.println("query error:"+e);
}finally{
try{
con.close();
}catch(SQLException se){}
}
}
/**
*
????˵Ã??ºÖ?ÐÐ?åÈë???üÐÂ??É??ýµÈÃ?ÓÐ?µ?Ø?á?û??µÄSQLÓï?ä
*
ÊäÈë?ÎÊý?ºConnection con Êý?Ý?âÁ??Ó
*
ÊäÈë?ÎÊý?ºString sql ÒªÖ?ÐеÄSQLÓï?ä
*
?µ?ØÀàÐÍ?º
*/
public void execute(Connection con, String sql){
try{
if(con==null) return;
Statement stmt = con.createStatement();
stmt.executeUpdate(sql);
}catch(Exception e){
System.out.println("query error:"+e);
}finally{
try{
con.close();
}catch(SQLException se){}
}
}
/**
*
????˵Ã??ºÖ?????
*
ÊäÈë?ÎÊý?º
*
?µ?ØÀàÐÍ?º
*/
public static void main(String[] arg){
if(arg.length!=3){
System.out.println("use: java odbcConn url username password");
return;
}
odbcConn oc = new odbcConn();
oc.url = arg[0];
oc.username=arg[1];
oc.password=arg[2];
oc.execute(oc.conn(),"insert into
userinfo(name,address)values('switch','new York')");
oc.query(oc.conn(),"select * from userinfo");
}
}
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