如何在eclipse（part2）中配置javadb？
这是我之前的问题的延续如何在eclipse中配置javadb？ 。 我能够对我的代码进行一些更改，但现在它给了我这个错误 – > 错误：java.net.ConnectException：错误连接到端口1527上的服务器localhost，消息连接被拒绝：连接 。 希望你们能帮助我解决这个问题。
这是我的代码：
import java.sql.Connection; import java.sql.DriverManager; import java.sql.ResultSet; import java.sql.Statement; public class Test { public static void main(String[] args) { try { Class.forName("org.apache.derby.jdbc.ClientDriver").newInstance(); } catch (InstantiationException e) { e.printStackTrace(); } catch (IllegalAccessException e) { e.printStackTrace(); } catch (ClassNotFoundException e) { e.printStackTrace(); } final String DB_URL = "jdbc:derby://localhost:1527/CoffeeDB;create=true"; try{ Connection conn = DriverManager.getConnection(DB_URL); Statement stmt = conn.createStatement(); String sql = ("CREATE TABLE Coffee(Description CHAR(25),ProdNum CHAR(10) NOT NULL PRIMARY KEY,Price DOUBLE)"); stmt.execute(sql); sql = "INSERT INTO Coffee VALUES('Bolivian Dark','14-001',8.95)"; stmt.executeUpdate(sql); sql = "INSERT INTO Coffee VALUES('Bolivian Medium','14-002',8.95)"; stmt.executeUpdate(sql); sql = "INSERT INTO Coffee VALUES('Brazilian Dark','15-001',7.95)"; stmt.executeUpdate(sql); sql = "INSERT INTO Coffee VALUES('Brazilian Medium','15-002',7.95)"; stmt.executeUpdate(sql); sql = "INSERT INTO Coffee VALUES('Brazilian Decaf','15-003',8.55)"; stmt.executeUpdate(sql); sql = "INSERT INTO Coffee VALUES('Central American Dark','16-001',9.95)"; stmt.executeUpdate(sql); sql = "INSERT INTO Coffee VALUES('Central American Medium','16-002',9.95)"; stmt.executeUpdate(sql); sql = "INSERT INTO Coffee VALUES('Sumatra Dark','17-001',7.95)"; stmt.executeUpdate(sql); sql = "INSERT INTO Coffee VALUES('Sumatra Decaf','17-002',8.95)"; stmt.executeUpdate(sql); sql = "INSERT INTO Coffee VALUES('Sumatra Medium','17-003',7.95)"; stmt.executeUpdate(sql); sql = "INSERT INTO Coffee VALUES('Sumatra Organic Dark','17-004',11.95)"; stmt.executeUpdate(sql); sql = "INSERT INTO Coffee VALUES('Kona Medium','18-001',18.45)"; stmt.executeUpdate(sql); sql = "INSERT INTO Coffee VALUES('Kona Dark','18-002',18.45)"; stmt.executeUpdate(sql); sql = "INSERT INTO Coffee VALUES('French Roast Dark','19-001',9.65)"; stmt.executeUpdate(sql); sql = "INSERT INTO Coffee VALUES('Galapagos Medium','20-001',6.85)"; stmt.executeUpdate(sql); sql = "INSERT INTO Coffee VALUES('Guatemalan Dark','21-001',9.95)"; stmt.executeUpdate(sql); sql = "INSERT INTO Coffee VALUES('Guatemalan Decaf','21-002',10.45)"; stmt.executeUpdate(sql); sql = "INSERT INTO Coffee VALUES('Guatemalan Medium','21-003',9.95)"; stmt.executeUpdate(sql); String sqlStatement = "SELECT Description FROM Coffee"; ResultSet result = stmt.executeQuery(sqlStatement); System.out.println("Coffees found in the Database"); System.out.println("-----------------------------"); while(result.next()){ System.out.println(result.getString("Description")); } conn.close(); }catch(Exception ex){ System.out.println("ERROR: " + ex.getMessage()); } } } 我一直在尝试使用您当前的代码，并发现在服务器未启动时发生exception。 解决这个问题的方法是以一种简单的方式启动服务器：
转到解压缩的derby server download over命令提示符文件夹中的lib文件夹。 对我来说如下：
C:\>cd opt\db-derby-10.11.1.1-lib\lib C:\opt\db-derby-10.11.1.1-lib\lib>java -jar derbyrun.jar server start Sat Oct 03 16:26:29 IST 2015 : Security manager installed using the Basic server security policy. Sat Oct 03 16:26:29 IST 2015 : Apache Derby Network Server - 10.11.1.1 - (1616546) started and ready to accept connections on port 1527
您可以通过不同的方式在Eclipse中启动服务器。 您需要安装插件然后启动服务器。 以下参考资料可以帮助您：
德比插件如何
Eclipse入门Derby插件入门