java连接oracle数据库(常用数据库连接四)

桃扇骨 2022-09-17 12:18 274阅读 0赞

1.确定安装好oracle数据库，用户名：scott 密码：tiger登录数据库建立一张表，内容如下：

![Center][]

2，eclipse或Myeclipse中建立工程并导入java连接oracle的jar包jdbc-oracle.jar，下载地址：[http://download.csdn.net/detail/whzhaochao/6414981][http_download.csdn.net_detail_whzhaochao_6414981]

3.建立iConn接口，代码如下：

package com.zhaochao.dba;
    
    import java.sql.Connection;
    public interface iConn {
    	Connection getConn();
    }

4.建立连接oracle数据库类实现iConn接口，代码如下：

注意修改数据库名，用户名和密码

package com.zhaochao.dba;
    
    import java.sql.Connection;
    import java.sql.DriverManager;
    
    public class OrcaleConn implements iConn {
    	
    	
    	private static final String DBDRIVER = "oracle.jdbc.driver.OracleDriver" ;
    	private static final String DBURL = "jdbc:oracle:thin:@127.0.0.1:1521:ORCL" ;
    	private static final String DBUSER = "scott" ;
    	private static final String DBPASS = "tiger";
    	private Connection conn=null;
    	@Override
    	public Connection getConn() {
    		// TODO Auto-generated method stub
    		
    		try {
    			Class.forName(DBDRIVER);
    			this.conn=DriverManager.getConnection(DBURL, DBUSER, DBPASS);
    			
    		} catch (Exception e) {
    			// TODO Auto-generated catch block
    			e.printStackTrace();
    		}
    		
    		return this.conn;
    
    	}
    
    }

5.测试连接

package com.zhaochao.dba;
    
    import java.sql.Connection;
    import java.sql.PreparedStatement;
    import java.sql.ResultSet;
    import java.sql.SQLException;
    
    public class Test {
    
    	/**
    	 * @param args
    	 */
    	public static void main(String[] args) {
    		// TODO Auto-generated method stub
    	//	TestMySQL();
    		TestOracle();	
    	//	TestDB2();
    	//	TestSQLServer();
    	//	TestAccess();
    		
    	}
    
    	
    	
    	private static void TestOracle() {
    		Connection conn=null;
    		PreparedStatement ps=null;
    		ResultSet rs=null;
    		iConn iconn=new OrcaleConn();
    		conn=iconn.getConn();
    		String sql="select * from zhaochao";
    		
    		try {
    			System.out.println("asdfasf");
    			ps=conn.prepareStatement(sql);
    			rs=ps.executeQuery();
    			while(rs.next()){
    				System.out.println(rs.getString(1)+"|"+rs.getString(2)+"|"+rs.getString(3));
    			}
    		} catch (SQLException e) {
    			// TODO Auto-generated catch block
    			e.printStackTrace();
    		}finally{
    			if(conn!=null){
    				try {
    					conn.close();
    				} catch (SQLException e) {
    					// TODO Auto-generated catch block
    					e.printStackTrace();
    				}
    			}
    			if(ps!=null){
    				try {
    					ps.close();
    				} catch (SQLException e) {
    					// TODO Auto-generated catch block
    					e.printStackTrace();
    				}
    			}
    			if(rs!=null){
    				try {
    					rs.close();
    				} catch (SQLException e) {
    					// TODO Auto-generated catch block
    					e.printStackTrace();
    				}
    			}
    		}
    	}
    }

6.测试结果：

asdfasf
    1|admin|admin
    2|zhaochao|zhaochao

[Center]: /images/20220828/1e439fbce29849f7b796d098e9204f4f.png
[http_download.csdn.net_detail_whzhaochao_6414981]: http://download.csdn.net/detail/whzhaochao/6414981