java.lang.ClassNotFoundException: oracle.jdbc.driver.OracleDriver 與 java.sql.SQLException: Listener refused the connection with the following error: 及”java連接oracle數據庫“

第一個java.lang.ClassNotFoundException: oracle.jdbc.driver.OracleDriver是沒有導入ojdbc[x].ja文件。

 

第二個java.sql.SQLException: Listener refused the connection with the following error:  是你數據源中url配置有問題。如下：

　　　　請打開F:\app\Admin_yfdsou\product\11.2.0\dbhome_1\NETWORK\ADMIN 

 

 

 java連接oracle示例代碼：

package org.lanqiao.test;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.Statement;

public class ConnTest {
    public Connection conn=null;  //數據庫連接類
    public Statement stmt=null;  //執行sql
    public ResultSet rs=null;   //保存查詢結果


    //oracle
    private static String dbDriver="oracle.jdbc.driver.OracleDriver";  
    private static String dbUrl="jdbc:oracle:thin:@127.0.0.1:1521:orcl";    
    //mysql5.7以下    
//    private static String dbDriver="com.mysql.jdbc.Driver";  
//    private static String dbUrl="jdbc:mysql://127.0.0.1:3306/mybatis";
    private static String dbUser="scott";
    private static String dbPwd="3333";
    
    //連接數據庫
    public static Connection getConnection(){
        Connection conn=null;
        try{
            Class.forName(dbDriver); //加載驅動
            conn=DriverManager.getConnection(dbUrl, dbUser, dbPwd);    
        }catch(Exception e){
            e.printStackTrace();
        }
        if(conn!=null){
            System.out.println("數據庫連接success");
        }else {
            System.err.println("警告：數據庫連接失敗");
        }
        return conn;
    }
    
    //執行查詢select
    public ResultSet doQuery(String sql){
        try{
            conn=ConnTest.getConnection();
            stmt=conn.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE,ResultSet.CONCUR_READ_ONLY); 
            rs=stmt.executeQuery(sql);  //執行select
        }catch(Exception e){
            e.printStackTrace();
        }
        return rs;
    }
    
    //執行新增、修改、刪除insert  update delete
    public int doUpdate(String sql){
        int result=0;
        try{
            conn=ConnTest.getConnection();
            stmt=conn.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE,ResultSet.CONCUR_READ_ONLY); 
            result=stmt.executeUpdate(sql);
        }catch(Exception e){
            e.printStackTrace();
        }
        return result;
    }
    
    //關閉數據庫連接
    public void closeConnection(){
        //先關閉結果集rs
        try{
            if(rs!=null){
                rs.close();
            }
        }catch(Exception e){
            e.printStackTrace();
        }
        //再關閉Statement
        try{
            if(stmt!=null){
                stmt.close();
            }
        }catch(Exception e){
            e.printStackTrace();
        }
        //最后關閉connection
        try{
            if(conn!=null){
                conn.close();
            }
        }catch(Exception e){
            e.printStackTrace();
        }
    }
    
    public static void main(String[] args){
        ConnTest connDB=new ConnTest();
        connDB.getConnection();
        String sql="Insert into scott.LANQIAO_INFOS values(10,'sz',1,1,1,1)";
        int result=connDB.doUpdate(sql);
        if(result>0) {
            System.out.println("insert ok");
        }
        
    }
    
    
}