JavaEE关联Oracle数据库

package com.neusoft.hello;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
public class Oracle {
	/**
	 * @param args
	 */
	public static void main(String[] args) {
		//2.建立同数据库的连接
		//url:统一资源定位符
		String url="jdbc:oracle:thin:@10.25.84.147:1521:orcl";//10.25.84.147为本机的Ip地址
		String user="scott";
		String password="tiger";
		Connection con=null;
		Statement st=null;
		String sql="select * from DEPT";
		String sql1="insert *from USERTEXT";  //两个数据库文件
		ResultSet rs=null;
		ResultSet rss=null;
		PreparedStatement pst=null;
		//1.加载驱动
		try{
			Class.forName("oracle.jdbc.driver.OracleDriver");
			con=DriverManager.getConnection(url,user,password);
			System.out.println("数据库连接成功!");
			con.setAutoCommit(false);//取消自动提交事务		
			st=con.createStatement();//3.取得statement对象
			rs=st.executeQuery(sql);//4.发送statement到Oracle中,并且查询表
			while(rs.next()){//取出结果集中的数据
				System.out.println("*************");
				String deptno=rs.getString(1);
				System.out.println(deptno);
				String dname=rs.getString(2);
				System.out.println(dname);
				String loc=rs.getString(3);
				System.out.println(loc);
				System.out.println("*************");
			}
			//int i=st.executeUpdate(sql1);
			//System.out.ptintln("删除的记录的条数为:"+i);//删除数据
	          //7.高级-->占位符
				pst=con.prepareStatement("insert into USERTEXT values(?,?,?)"); //USERTEXT自己建的表,
				pst.setString(1,"5");//给占位符赋值,通过setXXX方法
				pst.setString(2,"55");
				pst.setString(3,"555");
				int i=pst.executeUpdate();
				System.out.println("插入的记录的条数:"+i);
				con.commit();//事务处理,提交
			} catch (ClassNotFoundException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			} catch (SQLException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
				try {
					//事务处理-->回滚
					con.rollback();
				} catch (SQLException e1) {
					// TODO Auto-generated catch block
					e1.printStackTrace();
				}
			}

			// 6.关闭资源
			try {
				if (rs != null) {
					rs.close();
				}

			} catch (SQLException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
			try {
				if (st != null) {
					st.close();
				}
			} catch (SQLException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}

			try {
				if (pst != null) {
					pst.close();
				}
			} catch (SQLException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}

			try {
				if (con != null) {
					con.close();
				}
			} catch (SQLException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();  }
			}//
		
	}//


 

原文地址:https://www.cnblogs.com/sr1993/p/3697842.html