发布网友 发布时间:2022-04-09 21:01
共2个回答
懂视网 时间:2022-04-10 01:22
数据库是一个纯用Java实现的内存数据库。属于Apache的一个开源项目。因为是用Java实现的,所以能够在不论什么平台上执行。另外一个特点是体积小,免安装,仅仅须要几个小jar包就能够执行了。以下说下其安装及配置
安装
1).从apache下载Derby数据库(如db-derby-10.10.1.1-bin.zip)并解压到随意文件夹(如:D:Derbydb-derby-10.10.1.1-bin)。连接2).配置环境变量DERBY_HOME=D:Derbydb-derby-10.10.1.1-bin 并加入到path和classpath环境变量(%DERBY_HOME%in;%DERBY_HOME%libderbyrun.jar) 3).測试数据库安装 C:>sysinfo ------------------ Java Information ------------------ Java Version: 1.7.0_40 Java Vendor: Oracle Corporation Java home: C:Program FilesJavajdk1.7.0_40jre Java classpath: D:Derbydb-derby-10.10.1.1-binin;D:Derbydb-derby-10.10.1.1-binlibderbyrun.jar; OS name: Windows 7 OS architecture: amd64 OS version: 6.1 Java user name: qqqqq Java user home: D:userdataqqq Java user dir: C: java.specification.name: Java Platform API Specification java.specification.version: 1.7 java.runtime.version: 1.7.0_40-b43 --------- Derby Information -------- [D:Derbydb-derby-10.10.1.1-binlibderby.jar] 10.10.1.1 - (1458268) [D:Derbydb-derby-10.10.1.1-binlibderbytools.jar] 10.10.1.1 - (1458268) [D:Derbydb-derby-10.10.1.1-binlibderbynet.jar] 10.10.1.1 - (1458268) [D:Derbydb-derby-10.10.1.1-binlibderbyclient.jar] 10.10.1.1 - (1458268)
C:>ij ij 版本号 10.10 ij> CONNECT ‘jdbc:derby:D:ProjectderbyDB estdb;create=true‘;(假设数据库testdb不存在,则创建改数据库) ij> CONNECT ‘jdbc:derby:D:ProjectderbyDB estdb;‘; (连接testdb数据库) ij(CONNECTION1)> CREATE TABLE FIRSTTABLE(ID INT PRIMARY KEY,NAME VARCHAR(12));(创建表) 已插入/更新/删除 0 行 ij(CONNECTION1)> INSERT INTO FIRSTTABLE VALUES(10,‘TEN‘),(20,‘TWENTY‘),(30,‘THIRTY‘);(插入数据) 已插入/更新/删除 3 行 ij(CONNECTION1)> SELECT * FROM FIRSTTABLE; ID |NAME ------------------------ 10 |TEN 20 |TWENTY 30 |THIRTY 已选择 3 行 ij(CONNECTION1)>exit;(退出)说明
1. sysinfo工具用于显示Java环境信息和Derby的版本号信息。
2. ij工具来进行数据库交互,运行SQL脚本,如查询、增删改、创建表等
样例
以下是个完整的样例。怎样程序中操作JavaDB
import java.sql.Connection; import java.sql.DriverManager; import java.sql.ResultSet; import java.sql.Statement; import java.util.Properties; public class TestDerby { public static void main(String[] args) { try { Class.forName("org.apache.derby.jdbc.EmbeddedDriver").newInstance(); System.out.println("Load the embedded driver"); Connection conn = null; Properties props = new Properties(); props.put("user", "user1"); props.put("password", "user1"); conn=DriverManager.getConnection("jdbc:derby:C:\Project\derbyDB\testdb;"); System.out.println("create and connect to testdb"); Statement s = conn.createStatement(); ResultSet rs = s.executeQuery("SELECT * FROM FIRSTTABLE"); System.out.println("name score"); while(rs.next()) { StringBuilder builder = new StringBuilder(rs.getString(1)); builder.append(" "); builder.append(rs.getInt(1)); System.out.println(builder.toString()); } } catch (InstantiationException e) { e.printStackTrace(); } catch (IllegalAccessException e) { e.printStackTrace(); } catch (ClassNotFoundException e) { e.printStackTrace(); }catch (Exception e) { e.printStackTrace(); } } }
Derby数据库的安装配置及使用
标签:value family 查询 增删改 illegal format use span 使用
热心网友 时间:2022-04-09 22:30
Derby插件的安装与其他Eclipse插件安装类似,只需要将之前下载的两个插件解压到Eclipse plugins目录下,然后重新启动Eclipse即可。你可以通过Plugin Details窗口来查看该插件是否安装成功:选择菜单[Help]->[About Eclipse SDK],然后点击[Plugin Details]参考资料:http://blog.csdn.net/sanshiqier/archive/2007/06/27/1668447.aspx