package com.neusoft;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.Scanner;
public class MainProgram {
/**
* @param args
*/
/**
* 需求是:1:輸入a添加用戶信息2：輸入b查詢所有用戶信息3：輸入c刪除一個用戶信息4：輸入d更新一個用戶信息5：輸入e退出程序
* 要一步一步的輸入，直到輸入e結束本程序
* 運行本程序之前請確保一下連個條件
1：你的oracle數據庫裏先建好users表，表裏面有兩列id，number類型；name，varchar2(20);
sql語句:
CREATE TABLE users
(
ID NUMBER PRIMARY KEY,
NAME varchar2(20)
);
2：確認一下你的oracle數據庫，我的oracle端口是1521，用戶名：hr，密碼：hr。你連接數據庫的時候注意一下你的數據庫信息
3：本程序還有不足，請大神指教，聯繫QQ：136304953 微博：http://t.51cto.com/lst136；
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
System.out.println("本程序主要功能是：\n" + "1:輸入a添加用戶信息\n" + "2：輸入b查詢所有用戶信息\n"
+ "3：輸入c刪除一個用戶信息\n" + "4：輸入d更新一個用戶信息\n" + "5：輸入e退出程序\n");
System.out.println("請輸入你所有選擇的功能：");
Scanner input = new Scanner(System.in);//輸入所要選擇的功能
if ("a".equals(input.next())) {//輸入a後添加用戶信息
System.out.println("請輸入你要添加用戶的id：");
Scanner ipt = new Scanner(System.in);
int id = ipt.nextInt();
try {
Class.forName("oracle.jdbc.driver.OracleDriver");//加載數據庫驅動
String url = "jdbc:oracle:thin:@localhost:1521:oracle";//定義連接的數據庫
Connection conn = DriverManager.getConnection(url, "hr", "hr");//連接數據庫
String sql = "insert into users values(?,?)";//定義sql語句
PreparedStatement ps = conn.prepareStatement(sql);//預編譯sql語句
ps.setInt(1, id);
ps.setString(2, "寶貝");
if (ps.executeUpdate() > 0) {//判斷sql語句是否執行成功
System.out.println("添加用戶id:" + id + "的信息成功");
}
ps.close();//退出預編譯
conn.close();//退出數據庫連接
} catch (ClassNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
if ("b".equals(input.next())) {//輸入b後顯示用戶的信息
try {
Class.forName("oracle.jdbc.driver.OracleDriver");
String url = "jdbc:oracle:thin:@localhost:1521:oracle";
Connection conn = DriverManager.getConnection(url, "hr", "hr");
String sql = "select *from users";
PreparedStatement ps = conn.prepareStatement(sql);
ResultSet rs = ps.executeQuery();
while (rs.next()) {
int id = rs.getInt("id");
String name = rs.getString("name");
System.out.println(id + ":" + name);
}
rs.close();
ps.close();
conn.close();
} catch (ClassNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
if ((input.next()).equals("c")) {//輸入c後刪除用戶的信息
try {
System.out.println("請你輸入要刪除用戶的id：");
Scanner input1 = new Scanner(System.in);
int id = input1.nextInt();
Class.forName("oracle.jdbc.driver.OracleDriver");
String url = "jdbc:oracle:thin:@localhost:1521:oracle";
Connection conn = DriverManager.getConnection(url, "hr", "hr");
String sql = "delete from users where id=?";
PreparedStatement ps = conn.prepareStatement(sql);
ps.setInt(1, id);
if (ps.executeUpdate() > 0) {
System.out.println("刪除用戶成功！！！");
}
ps.close();
conn.close();
} catch (ClassNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
if ((input.next()).equals("d")) {//輸入d後修改用戶的信息
System.out.println("請輸入要修改用戶的id：");
Scanner input2 = new Scanner(System.in);
int id = input2.nextInt();
try {
Class.forName("oracle.jdbc.driver.OracleDriver");
String url = "jdbc:oracle:thin:@localhost:1521:oracle";
Connection conn = DriverManager.getConnection(url, "hr", "hr");
String sql = "update users set name=? where id=?";
PreparedStatement ps = conn.prepareStatement(sql);
ps.setString(1, "妹妹");
ps.setInt(2, id);
if (ps.executeUpdate() > 0) {
System.out.println("修改用戶id=" + id + "的信息成功");
}
ps.close();
conn.close();
} catch (ClassNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
if ((input.next()).equals("e")) {//輸入e後退出本程序
System.exit(0);
}
}
}