create table student
(
 id number(11) not null primary key,
 stu_name varchar(16) not null,
 gender number(11) default null,
 age number(11) default null,
 address varchar(128) default null
);

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import java.sql.SQLException;
public class OperateOracle {
 // 定義連接所需的字符串
 // 192.168.0.X是本機(jī)地址(要改成自己的IP地址)，1521端口號(hào)，XE是精簡(jiǎn)版Oracle的默認(rèn)數(shù)據(jù)庫(kù)名
 private static String USERNAMR = "orcl";
 private static String PASSWORD = "orcl";
 private static String DRVIER = "oracle.jdbc.OracleDriver";
 private static String URL = "jdbc:oracle:thin:@192.168.0.X:1521:xe";
 // 創(chuàng)建一個(gè)數(shù)據(jù)庫(kù)連接
 Connection connection = null;
 // 創(chuàng)建預(yù)編譯語(yǔ)句對(duì)象，一般都是用這個(gè)而不用Statement
 PreparedStatement pstm = null;
 // 創(chuàng)建一個(gè)結(jié)果集對(duì)象
 ResultSet rs = null;
 /**
 * 向數(shù)據(jù)庫(kù)中增加數(shù)據(jù)
 * 首先獲取表內(nèi)數(shù)據(jù)總數(shù),總數(shù)+1為新增數(shù)據(jù)的id值
 * @param stuName:學(xué)生姓名
 * @param gender:學(xué)生性別,1表示男性,2表示女性
 * @param age:學(xué)生年齡
 * @param address:學(xué)生住址
 */
 public void AddData(String stuName, int gender, int age, String address) {
 connection = getConnection();
 // String sql =
 // "insert into student values('1','王小軍','1','17','北京市和平里七區(qū)30號(hào)樓7門(mén)102')";
 String sql = "select count(*) from student where 1 = 1";
 String sqlStr = "insert into student values(?,?,?,?,?)";
 int count = 0;
 try {
 // 計(jì)算數(shù)據(jù)庫(kù)student表中數(shù)據(jù)總數(shù)
 pstm = connection.prepareStatement(sql);
 rs = pstm.executeQuery();
 while (rs.next()) {
 count = rs.getInt(1) + 1;
 System.out.println(rs.getInt(1));
 }
 // 執(zhí)行插入數(shù)據(jù)操作
 pstm = connection.prepareStatement(sqlStr);
 pstm.setInt(1, count);
 pstm.setString(2, stuName);
 pstm.setInt(3, gender);
 pstm.setInt(4, age);
 pstm.setString(5, address);
 pstm.executeUpdate();
 } catch (SQLException e) {
 e.printStackTrace();
 } finally {
 ReleaseResource();
 }
 }
 /**
 * 向數(shù)據(jù)庫(kù)中刪除數(shù)據(jù)
 * @param stuName:根據(jù)姓名刪除數(shù)據(jù)
 */
 public void DeleteData(String stuName) {
 connection = getConnection();
 String sqlStr = "delete from student where stu_name=?";
 System.out.println(stuName);
 try {
 // 執(zhí)行刪除數(shù)據(jù)操作
 pstm = connection.prepareStatement(sqlStr);
 pstm.setString(1, stuName);
 pstm.executeUpdate();
 } catch (SQLException e) {
 e.printStackTrace();
 } finally {
 ReleaseResource();
 }
 }
 /**
 * 向數(shù)據(jù)庫(kù)中修改數(shù)據(jù)
 * @param stuName:學(xué)生姓名,根據(jù)此值查詢要修改的某行值
 * @param gender
 * @param age
 * @param address
 */
 public void UpdateData(String stuName, int gender, int age, String address) {
 connection = getConnection();
 String sql = "select id from student where 1 = 1 and stu_name = ?";
 String sqlStr = "update student set stu_name=?,gender=?,age=?,address=? where id=?";
 int count = 0;
 try {
 // 計(jì)算數(shù)據(jù)庫(kù)student表中數(shù)據(jù)總數(shù)
 pstm = connection.prepareStatement(sql);
 pstm.setString(1, stuName);
 rs = pstm.executeQuery();
 while (rs.next()) {
 count = rs.getInt(1);
 System.out.println(rs.getInt(1));
 }
 // 執(zhí)行插入數(shù)據(jù)操作
 pstm = connection.prepareStatement(sqlStr);
 pstm.setString(1, stuName);
 pstm.setInt(2, gender);
 pstm.setInt(3, age);
 pstm.setString(4, address);
 pstm.setInt(5, count);
 pstm.executeUpdate();
 } catch (SQLException e) {
 e.printStackTrace();
 } finally {
 ReleaseResource();
 }
 }
 /**
 * 向數(shù)據(jù)庫(kù)中查詢數(shù)據(jù)
 */
 public void SelectData() {
 connection = getConnection();
 String sql = "select * from student where 1 = 1";
 try {
 pstm = connection.prepareStatement(sql);
 rs = pstm.executeQuery();
 while (rs.next()) {
 String id = rs.getString("id");
 String name = rs.getString("stu_name");
 String gender = rs.getString("gender");
 String age = rs.getString("age");
 String address = rs.getString("address");
 System.out.println(id + "\t" + name + "\t" + gender + "\t"
 + age + "\t" + address);
 }
 } catch (SQLException e) {
 e.printStackTrace();
 } finally {
 ReleaseResource();
 }
 }
 /**
 * 使用ResultSetMetaData計(jì)算列數(shù)
 */
 public void SelectData2() {
 connection = getConnection();
 String sql = "select * from employees where 1 = 1";
 int count = 0;
 try {
 pstm = connection.prepareStatement(sql);
 rs = pstm.executeQuery();
 while (rs.next()) {
 count++;
 }
 ResultSetMetaData rsmd = rs.getMetaData();
 int cols_len = rsmd.getColumnCount();
 System.out.println("count=" + count + "\tcols_len=" + cols_len);
 } catch (SQLException e) {
 e.printStackTrace();
 } finally {
 ReleaseResource();
 }
 }
 /**
 * 獲取Connection對(duì)象
 * 
 * @return
 */
 public Connection getConnection() {
 try {
 Class.forName(DRVIER);
 connection = DriverManager.getConnection(URL, USERNAMR, PASSWORD);
 System.out.println("成功連接數(shù)據(jù)庫(kù)");
 } catch (ClassNotFoundException e) {
 throw new RuntimeException("class not find !", e);
 } catch (SQLException e) {
 throw new RuntimeException("get connection error!", e);
 }
 return connection;
 }
 /**
 * 釋放資源
 */
 public void ReleaseResource() {
 if (rs != null) {
 try {
 rs.close();
 } catch (SQLException e) {
 e.printStackTrace();
 }
 }
 if (pstm != null) {
 try {
 pstm.close();
 } catch (SQLException e) {
 e.printStackTrace();
 }
 }
 if (connection != null) {
 try {
 connection.close();
 } catch (SQLException e) {
 e.printStackTrace();
 }
 }
 }
}