具体信息如下：java.sql.SQLException:Listener refused the connection with the following error:ORA—12505,TNS：Listener dose not currentlly kown of SID given in connect descriptor the connection description used by client was 127.0.0.1:1521:yx

打不开nc,提示信息是java.sql.SQLException:Listener refused the connection wit我安装的是oracle数据库。具体的提示信息如下：java.sql.SQLException:Listener refused the connection with the following error:ORA—12505，TNS：List 具体信息如下：java.sql.SQLException:Listener refused the connection with the following error:ORA—12505,TNS：Listener dose not currentlly kown of SID given in connect descriptor the connection description used by client was 127.0.0.1:1521:yx java.sql.time java.sql.date 二者如何组合成一个java.util.date java.sql.Date与java.util.Date的区别 Java 如何根据现在的时间毫秒来计算时间的公式(不想用原有的类)java.sql.Timestamp time ;long tt = -1 ;time = new java.sql.Timestamp(new java.util.Date().getTime());tt = time.getTime()来获得信息.我希望可以根据一些 import javax.swing.*; import java.awt.*; import java.awt.event.*; import java.sql.*; public class a java.sql.date的时分秒去哪里了? java.sql.date的时分秒去哪里了? java.sql.SQLException: Illegal operation on empty result set.import java.sql.Connection;import java.sql.ResultSet;import java.sql.Statement;public class shujuku { public static void main(String args[]) { Connection conn; conn = Conn java如何获取当前时间 年月日 时分秒并且转成java.sql.Date格式.谢谢你们 import=java.sql.*和import=java.util.* 有什么区别? java 中import java.sql.Connection 报错：The import java.sql.Connection conflicts with a type defined in the same file create or replace package testpackage as type test_cursor is ref cursor; end testpackage; create or运行时出现如下问题 是怎么回事?java.sql.SQLException: ORA-06550: 第 1 行, 第 20 列: PLS-00103: 出现符号 ;在需要下列之一 java.sql.SQLException:Operation not allowed after ResultSet closed我就用了一次执行语句,为什么会出现这种异常?程序如下：……………… import java.io.IOException;import java.io.OutputStream;import java.net.Socket;import java.net.UnknownHostException;import java.sql.ResultSet;import org.sql.IntoDB;public class BaiduReferer {public static void main(String[] args) throws UnknownHostExc SQL >select count(*) from Teacher where teacherCode=? and teacherPassword=? java.sql.SQLException:SQL >select count(*) from Teacher where teacherCode=? and teacherPassword=?java.sql.SQLException: Can not issue executeUpdate() for SELECTsat com.mysql. java.sql.SQLException:Io 异常:The Network Adapter could not establish the connection 刚刚安装的oracle 10g ,oracle 实例和 监听器都正确启动,但是用DB连接的时候就出现了这个错误.我的java 源代码如下package demo1;imp 请问sql=select * from 招聘信息 order by id