export PATH=$JAVA_HOME/bin:$JAVA_HOME/jre/bin:$PATH

export CLASSPATH=.:$JAVA_HOME/lib:$JAVA_HOME/jre/lib

public static void main(String args[]){

HelloWorld hello=new HelloWorld();

hello.printHello();

}

private void printHello(){

System.out.println("hello!!!");

}

}

[[email protected] test]# java HelloWorld

hello!!!

Using CATALINA_HOME:   /opt/tomcat

Using CATALINA_TMPDIR: /opt/tomcat/temp

Using JRE_HOME:        /opt/jdk

Using CLASSPATH:       /opt/tomcat/bin/bootstrap.jar

[[email protected] etc]# useradd -g mysql mysql

[[email protected] home]# ll

total 32

drwx------  2 root  root  16384 Oct 25  2009 lost+found

drwx------  2 lto   lto    4096 Oct 25  2009 lto

drwx------  2 mysql mysql  4096 Oct 25 01:01 mysql

[[email protected] mysql-5.1.30]# make install

[[email protected] bin]# chown -R mysql var

[[email protected] bin]# chgrp –R mysql .

091025 23:50:50 mysqld_safe A mysqld process already exists

Enter password:

Welcome to the MySQL monitor.  Commands end with ; or \g.

Your MySQL connection id is 5

Server version: 5.1.30 Source distribution

Type ‘help;‘ or ‘\h‘ for help. Type ‘\c‘ to clear the buffer.

mysql>

+--------------------+

| Database           |

+--------------------+

| information_schema |

| mysql              |

| redmoonoa          |

| test               |

+--------------------+

4 rows in set (0.07 sec)

Database changed

Empty set (0.00 sec)

-> ;

Query OK, 1 row affected (0.02 sec)

mysql> use mysql_test;

Database changed

mysql> create table users ( id int(3) auto_increment not null primary key, namechar(10) not null, pwd char(10) not null);

Query OK, 0 rows affected (0.04 sec)

-> ;

+-------+----------+------+-----+---------+----------------+

| Field | Type     | Null | Key | Default | Extra          |

+-------+----------+------+-----+---------+----------------+

| id    | int(3)   | NO   | PRI | NULL    | auto_increment |

| name  | char(10) | NO   |     | NULL    |                |

| pwd   | char(10) | NO   |     | NULL    |                |

+-------+----------+------+-----+---------+----------------+

Query OK, 1 row affected (0.00 sec)

mysql> insert into users(name,pwd) values(‘admin‘,‘123456‘);

Query OK, 1 row affected (0.01 sec)

-> ;

+----+-------+--------+

| id | name  | pwd    |

+----+-------+--------+

|  1 | user1 | 123456 |

|  2 | admin | 123456 |

+----+-------+--------+

2 rows in set (0.00 sec)

import="java.sql.*"%>

<meta http-equiv="Content-Type" content="text/html; charset=gb2312">

<%

String server="localhost";

String dbname="mysql_test";

String user="root";

String pass="123456";

String port="3306";

String url ="jdbc:mysql://"+server+":"+port+"/"+dbname+"?user="+user+"&password="+pass;

Class.forName("com.mysql.jdbc.Driver").newInstance();

Connection conn= DriverManager.getConnection(url);

Statement stmt=conn.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE,ResultSet.CONCUR_UPDATABLE);

String sql="select name,pwd from users";

ResultSet rs=stmt.executeQuery(sql);

while(rs.next()){

out.print("username:");

out.print(rs.getString("name")+" password:");

out.println(rs.getString("pwd")+"<br>");

}

rs.close();

stmt.close();

conn.close();

%>