Orcale数据库连接

import java.io.IOException;
import java.io.InputStream;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.Properties;


import javax.sql.DataSource;


import org.apache.commons.dbcp.BasicDataSourceFactory;


public class DBUtile {
private static  DataSource  dataSource;
    static {
    Properties  pro = new Properties();
    InputStream   inputStream = DBUtile.class.getClassLoader()
    .getResourceAsStream("db.properties");
    try {
pro.load(inputStream);
dataSource = BasicDataSourceFactory.createDataSource(pro);
} catch (IOException e) {
e.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
}
    }
    public  static Connection  getConnection(){
    try {
return  dataSource.getConnection();
} catch (SQLException e) {
e.printStackTrace();
}
    return  null;
    }
    public  static  void  realeaseResource(Connection conn,Statement st,
    ResultSet rs){
    if(rs != null){
    try {
rs.close();
} catch (SQLException e) {
e.printStackTrace();
}finally{
rs = null;
}
    }
    if(st != null){
    try {
st.close();
} catch (SQLException e) {
e.printStackTrace();
}finally{
st = null;
}
    }
    if(conn != null){
    try {
conn.close();
} catch (SQLException e) {
e.printStackTrace();
}finally{
conn = null;
}
    }
    }
}