一、加載oracle驅動jar包，ojdbc6.jar
二、build path *.jar
BuildPath中只支持加入jar文件，具體方法如下： 在eclips里在工程名上右鍵->build path->contigure bud path->java build path里有個 libraries->
add external jars = 增加工程外部的包;
add jars = 增加工程內包 ;
add library = 增加一個庫;
add class folder = 增加一個類文件夾
介紹add library中的User Libraries 添加User Library,具體做法如下：
1. 選中工程右鍵->build path->Add Libraries...
2. 選擇User Library->next
3. 點擊User Library按鈕
4. 點擊new按鈕
5. 輸入Library name
6.點擊ok
7.選中該user library, 然后點擊add jars
8.找到對應jar包,依次確定即可。
三、連接數據庫
import java.sql.Connection;
import java.sql.SQLException;
import java.sql.DriverManager;
import java.sql.ResultSet;
//import java.sql.Statement;
import java.sql.PreparedStatement;
public class Jdbcconnect { public static void main(String[] args) {
final String URL = "jdbc:oracle:thin:@ip/實例名";
final String USER = "數據庫用戶名";
final String PWD = "密碼";
try {
//加載驅動程序 Class.forName("oracle.jdbc.OracleDriver");
System.out.println("加載驅動成功！");
}catch (Exception e){ System.out.println("加載驅動異常"+e);
} try { //獲得數據庫連接
Connection con = DriverManager.getConnection(URL,USER,PWD);
System.out.println("加載數據庫連接成功！");
String sql = "select * from t_sys_user";
PreparedStatement pt = con.prepareStatement(sql);
ResultSet rs = pt.executeQuery();
System.out.println(rs.next());
while(rs.next()) {
String userid = rs.getString("userid");
System.out.println(userid); }
rs.close(); pt.close();
con.close();
}catch (SQLException e){ System.out.println("加載數據庫連接異常"+e); } }
}