1ã€æ¯”较常ç”?/strong>
try{
Class.forName("com.mysql.jdbc.Driver");//åŠ è²æ•°æ®åº“驱åŠ?/span>
String url="jdbc:mysql://localhost:3306/databasename";//æ•°æ®åº“连接ååè®®
Connection conn=DriverManager.getConnection(url,"username","password");
Statement stmt=conn.createStatement();
ResultSet rs=stmt.executeQuery("select * from tablename");
while(rs.next()){//ä¸æ–指å‘下一æ¡è®°å½?/strong>
System.out.println("DeptNo:"+rs.getInt(1));
System.out.println("\tDeptName:"+rs.getString(2));
System.out.println("\tLOC:"+rs.getString(3));
}
rs.close();
stmt.close();
conn.close();
}catch(ClassNotFoundException e){
System.out.println("找ä¸åˆ°æŒ‡å®šçš„驱动½E‹åº¾c»ï¼");
}catch(SQLException e){
e.printStackTrace();
}
2ã€é€šè¿‡¾pÈ»Ÿçš„属性设¾|?/strong>
try{
System.setProperty("jdbc.driver","com.mysql.jdbc.Driver");//¾pÈ»Ÿå±žæ€§æŒ‡å®šæ•°æ®åº“驱动
String url="jdbc:mysql://localhost:3306/databasename";//æ•°æ®åº“连接ååè®®
Connection conn=DriverManager.getConnection(url,"username","password");
Statement stmt=conn.createStatement();
ResultSet rs=stmt.executeQuery("select * from tablename");
while(rs.next()){//ä¸æ–指å‘下一æ¡è®°å½?/strong>
System.out.println("DeptNo:"+rs.getInt(1));
System.out.println("\tDeptName:"+rs.getString(2));
System.out.println("\tLOC:"+rs.getString(3));
}
rs.close();
stmt.close();
conn.close();
}catch(SQLException e){
e.printStackTrace();
}
3ã€çœ‹èµäh¥æ¯”较直观的一¿Uæ–¹å¼ï¼Œæ³¨å†Œç›¸åº”çš„dbçš„jdbc驱动åQ?在编译时需è¦å¯¼å…¥å¯¹åº”çš„lib
try{
new com.mysql.jdbc.Driver();//创å¾driver对象åQŒåŠ 载数æ®åº“驱动
String url="jdbc:mysql://localhost:3306/databasename";//æ•°æ®åº“连接ååè®®
Connection conn=DriverManager.getConnection(url,"username","password");
Statement stmt=conn.createStatement();
ResultSet rs=stmt.executeQuery("select * from tablename");
while(rs.next()){//ä¸æ–指å‘下一æ¡è®°å½?/strong>
System.out.println("DeptNo:"+rs.getInt(1));
System.out.println("\tDeptName:"+rs.getString(2));
System.out.println("\tLOC:"+rs.getString(3));
}
rs.close();
stmt.close();
conn.close();
}catch(SQLException e){
e.printStackTrace();
}
]]>
DBConnection.java
import java.sql.*;
import java.util.Locale;
import java.util.PropertyResourceBundle;
/**
* @author study
*
* 从给定的资æºä¿¡æ¯ä¸å¾—到数æ®åº“è”接对象
*
*/
public class DBConnection {
Connection conn = null;
/**
* 从给定的资æºæ–‡äšgä¸èŽ·å¾—连接数æ®åº“çš„å‚æ•?br />*
*/
public boolean getConnect() {
String str_URL = "";
String str_userName = "";
String str_passWord = ""; // the connect passWord
String str_JdbcDriverName = ""; // the connect JDBCDriverName
// Connection con = null;
try {
PropertyResourceBundle configBundle = (PropertyResourceBundle) PropertyResourceBundle
.getBundle("common.jiangbin.dms.product",
new Locale("cn", "CN"));
if (configBundle == null) {
System.out.println("æ–‡äšgproduct_cn_CN.propertiesè¯Õd…¥é”™è¯¯");
return false;
}
// the connect URL
str_URL = configBundle.getString("ConnectString");
// the connect userName
str_userName = configBundle.getString("UserID");
// the connect passWord
str_passWord = configBundle.getString("Password");
// the connect JDBCDriverName
str_JdbcDriverName = configBundle.getString("JdbcDriverName");
try {
// åŠ è²é©±åŠ¨½E‹åº
Class.forName(str_JdbcDriverName).newInstance();
} catch (ClassNotFoundException e) {
System.out.println("Driver not found");
}
// DriverManager.registerDriver(new oracle.jdbc.OracleDriver());
// DriverManager.registerDriver(null);
this.conn = DriverManager.getConnection(str_URL, str_userName,
str_passWord);
} catch (Exception e) {
e.printStackTrace();
return false;
}
return true;
}
/**
* Returns the conn.
*
* @return Connection
*/
public Connection getConn() {
return conn;
}
/**
* Sets the conn.
*
* @param conn
* The conn to set
*/
public void setConn(Connection conn) {
this.conn = conn;
}
}
属性文件product_cn_CN.propertiesåQˆç”¨äºŽMSSQLåQ?/p>
ConnectString=jdbc:microsoft:sqlserver://localhost:1433;DatabaseName=DocManagerSystem
UserID=sa
Password=sa
JdbcDriverName=com.microsoft.jdbc.sqlserver.SQLServerDriver
属性文件product_cn_CN.propertiesåQˆç”¨äºŽMYSQLåQ?/p>
ConnectString=jdbc:mysql://localhost:3306/mydata
UserID=sa
Password=sa
JdbcDriverName=com.mysql.jdbc.Driver
]]>
]]>