Borland JBuilder 是一个非常方便的Java IDE 开发工具,而JBoss 则是一个很好的开源应用服务器,Oracle 9i是优秀的企业级数据库。下面就介绍在Windows XP环境下来配置JBuilder 2005、JBoss 4.0和Oracle9i 的J2EE开发环境。 1.安装 SDK 到 D:j2sdk1.4.2_06;方
Borland JBuilder 是一个非常方便的Java IDE 开发工具,而JBoss 则是一个很好的开源应用服务器,Oracle 9i是优秀的企业级数据库。下面就介绍在Windows XP环境下来配置JBuilder 2005、JBoss 4.0和Oracle9i 的J2EE开发环境。
1.安装 SDK 到 D:j2sdk1.4.2_06;方法为:双击执行下载的 j2sdk-1_4_2_06-windows-i586-p.exe 文件,选择安装目录为 D:j2sdk1.4.2_06,其它默认即可。
2.安装JBOSS,方法为:将下载的 jboss-4.0.1RC1.zip 文件解压到任意一个目录,如 D:jboss4.0,在此文件夹下有一系列的文件和文件夹。即将 JBOSS 安装到了 D:jboss4.0目录中。
3、设置环境变量,,在 winxp 下方法为,在桌面上右键点击“我的电脑”,选择属性,然后在弹出的页面上点“高级” -> “环境变量”,然后在弹出的页面中“系统变量”下点击“新建”,然后在弹出的窗口中“变量名 (N)” 输入“ JAVA_HOME ”,在“变量值 (V) ”一栏中输入“D:j2sdk1.4.2_06 ”。JBOSS_HOME 值为:D:jboss4.0 ,添加Path:“D:j2sdk1.4.2_06in; D:jboss4.0in ”
4、在JBuilder中配置JBoss,选择Tools的Config servers,然后选择JBoss3+,选中Enable server,指定Home Directory即可。
5、在JBoss中配置Oracle9i数据源并测试, Oracle以它的运行稳定和可靠成为了一个非常受欢迎的企业级数据库。要在Jboss 上配置使用Oracle的话我们要做的第一件事就是把Oracle的JDBC驱动程序复制到ClassPath下。我们把这个JDBC驱动程序(classes111.zip和classes12.zip)复制到server/default/lib目录下。为了使用Oracle的事务处理数据源我们还要把/docs/examples/jca/oracle-xa-ds.XML复制到/server/default/deploy目录下。假如使用的事非事务处理的数据源,就把/docs/examples/jca/oracle-ds.xml文件复制到/server/default/deploy目录下。
下一步,我们需要修改oracle-ds.xml配置文件。修改部分如下:
OracleDS
jdbc:oracle:thin:@localhost:oradb
oracle.jdbc.driver.OracleDriver
hrms
hrms
org.jboss.resource.adapter.jdbc.vendor.OracleExceptionSorter
Oracle9i
下面就来运行JBoss测试连接数据库:
步骤如下:“jboss安装目录serverdefaultdeploy”中新建文件夹db_test.war,在db_test.war中新建index.jsp,内容如下:
language="java"
contentType="text/Html; charset=gb2312"
pageEncoding="GBK"
%>
测试JBOSS连接Oracle 9i数据库
Test Oracle Database
InitialContext ctx = new InitialContext();
DataSource ds = (DataSource) ctx.lookup("java:/OracleDS");
Connection conn = ds.getConnection();
Statement stmt = conn.createStatement();
ResultSet rs = stmt.executeQuery("SELECT TO_CHAR(SYSDATE,´YYYY-MM-DD HH24:MI:SS´) FROM DUAL");
while ( rs.next() ) {
out.println( rs.getString(1) + "
");
out.println( "My name is Justinchen
");
}
conn.close();
%>
在db_test.war中新建文件夹WEB-INF,其中有两个文件jboss-web.xml和web.xml,其中jboss-web.xml内容如下:
而web.xml内容如下:
"-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
"">
访问:8080/db_test,成功后表示和数据库正常连接了。

The main difference between MySQL and SQLite is the design concept and usage scenarios: 1. MySQL is suitable for large applications and enterprise-level solutions, supporting high performance and high concurrency; 2. SQLite is suitable for mobile applications and desktop software, lightweight and easy to embed.

Indexes in MySQL are an ordered structure of one or more columns in a database table, used to speed up data retrieval. 1) Indexes improve query speed by reducing the amount of scanned data. 2) B-Tree index uses a balanced tree structure, which is suitable for range query and sorting. 3) Use CREATEINDEX statements to create indexes, such as CREATEINDEXidx_customer_idONorders(customer_id). 4) Composite indexes can optimize multi-column queries, such as CREATEINDEXidx_customer_orderONorders(customer_id,order_date). 5) Use EXPLAIN to analyze query plans and avoid

Using transactions in MySQL ensures data consistency. 1) Start the transaction through STARTTRANSACTION, and then execute SQL operations and submit it with COMMIT or ROLLBACK. 2) Use SAVEPOINT to set a save point to allow partial rollback. 3) Performance optimization suggestions include shortening transaction time, avoiding large-scale queries and using isolation levels reasonably.

Scenarios where PostgreSQL is chosen instead of MySQL include: 1) complex queries and advanced SQL functions, 2) strict data integrity and ACID compliance, 3) advanced spatial functions are required, and 4) high performance is required when processing large data sets. PostgreSQL performs well in these aspects and is suitable for projects that require complex data processing and high data integrity.

The security of MySQL database can be achieved through the following measures: 1. User permission management: Strictly control access rights through CREATEUSER and GRANT commands. 2. Encrypted transmission: Configure SSL/TLS to ensure data transmission security. 3. Database backup and recovery: Use mysqldump or mysqlpump to regularly backup data. 4. Advanced security policy: Use a firewall to restrict access and enable audit logging operations. 5. Performance optimization and best practices: Take into account both safety and performance through indexing and query optimization and regular maintenance.

How to effectively monitor MySQL performance? Use tools such as mysqladmin, SHOWGLOBALSTATUS, PerconaMonitoring and Management (PMM), and MySQL EnterpriseMonitor. 1. Use mysqladmin to view the number of connections. 2. Use SHOWGLOBALSTATUS to view the query number. 3.PMM provides detailed performance data and graphical interface. 4.MySQLEnterpriseMonitor provides rich monitoring functions and alarm mechanisms.

The difference between MySQL and SQLServer is: 1) MySQL is open source and suitable for web and embedded systems, 2) SQLServer is a commercial product of Microsoft and is suitable for enterprise-level applications. There are significant differences between the two in storage engine, performance optimization and application scenarios. When choosing, you need to consider project size and future scalability.

In enterprise-level application scenarios that require high availability, advanced security and good integration, SQLServer should be chosen instead of MySQL. 1) SQLServer provides enterprise-level features such as high availability and advanced security. 2) It is closely integrated with Microsoft ecosystems such as VisualStudio and PowerBI. 3) SQLServer performs excellent in performance optimization and supports memory-optimized tables and column storage indexes.


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