Java Jdbc 连接 Oracle  执行简单查询示例：

package com.test.dbtest;

import java.sql.CallableStatement;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;

/**Jdbc 连接 Oracle 数据库 简单示例
 *@author wanggq
 *@version 创建时间：2014年3月31日 上午11:00:06
 *类说明
 */
public class TestO_procedure01 {

	public static void main(String[] args) {
		String driver = "oracle.jdbc.driver.OracleDriver";
		String url = "jdbc:Oracle:thin:@localhost:1521:orcl";
		Statement stmt = null;
		ResultSet res = null;
		Connection conn = null;
		CallableStatement proc = null;
		String sql = " select T.REC_NO, T.AIRLINE,T.DEPARTURE,T.ARRIVAL from CDP_MAIN_ORDER t where t.departure=upper('pek')";
		
		try {
			Class.forName(driver);
			conn = DriverManager.getConnection(url, "abc123", "abc123");
			stmt = conn.createStatement();
			res = stmt.executeQuery(sql);
			while(res.next())
			{
				String rec = res.getString("REC_NO");
				String airline = res.getString("AIRLINE");
				String dept = res.getString("DEPARTURE");
				String arr = res.getString("ARRIVAL");
				System.out.println(rec+" "+airline+" "+dept+" "+arr);
			}
			
		} catch (ClassNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		
		
		

	}

}

也可以使用防止SQL注入PreparedStatement方法

		PreparedStatement stmt = null;
		ResultSet res = null;
		Connection conn = null;
		CallableStatement proc = null;
		String sql = " select T.REC_NO, T.AIRLINE,T.DEPARTURE,T.ARRIVAL from CDP_MAIN_ORDER t where t.departure=upper(?)";
		
		try {
			Class.forName(driver);
			conn = DriverManager.getConnection(url, "abc123", "abc123");
			stmt = conn.prepareStatement(sql);
			stmt.setString(1, "pek");
			res = stmt.executeQuery();

DB: