Apache Tomcat/6.0.39如何配置连接mysql，JDBC:mysql-connector-java-5.1.30-bin.jar-成功连接心得
http://tomcat.apache.org/tomcat-6.0-doc/jndi-datasource-examples-howto.html前提：开启TOMCAT,MYsql
MySQL DBCP Example
0. Introduction
Versions of MySQL and JDBC drivers that have been reported to work:
MySQL 3.23.47, MySQL 3.23.47 using InnoDB,, MySQL 3.23.58, MySQL 4.0.1alpha
Connector/J 3.0.11-stable (the official JDBC Driver)
mm.mysql 2.0.14 (an old 3rd party JDBC Driver)
Before you proceed, don't forget to copy the JDBC Driver's jar into $CATALINA_HOME/lib.
这句话的意思是说，在开始下面的工作之前必须将JDBC驱动jar包(我用的是mysql-connector-java-5.1.30-bin.jar)，放到G:\apache-tomcat-6.0.39-windows-x86\apache-tomcat-6.0.39/lib目录下，另外我自己昨天捣鼓的时候设置过一些环境变量，不知道会不会有影响，通过下面的测试发现，没有影响。（我的环境变量CATALINA_HOME值设置为G:\apache-tomcat-6.0.39-windows-x86\apache-tomcat-6.0.39）
1. MySQL configuration
Ensure that you follow these instructions as variations can cause problems.
Create a new test user, a new database and a single test table. Your MySQL user must have a password assigned. The driver will fail if you try to connect with an empty password.
mysql> GRANT ALL PRIVILEGES ON *.* TO javauser@localhost
-> IDENTIFIED BY 'javadude' WITH GRANT OPTION;
mysql> create database javatest;
mysql> use javatest;
mysql> create table testdata (
-> id int not null auto_increment primary key,
-> foo varchar(25),
-> bar int);
Note: the above user should be removed once testing is complete!
Next insert some test data into the testdata table.
mysql> insert into testdata values(null, 'hello', 12345);
Query OK, 1 row affected (0.00 sec)
mysql> select * from testdata;
+----+-------+-------+
| ID | FOO | BAR |
+----+-------+-------+
|1 | hello | 12345 |
+----+-------+-------+
1 row in set (0.00 sec)
mysql>
2. Context configuration
Configure the JNDI DataSource in Tomcat by adding a declaration for your resource to your Context.
For example:
context.xml在G:\apache-tomcat-6.0.39-windows-x86\apache-tomcat-6.0.39\conf目录下（我的笔记本上）
url="jdbc:mysql://localhost:3306/javatest"/>
经过再三测试还是要3306才对
3. web.xml configuration
Now create a WEB-INF/web.xml for this test application.
这里原文说的不是很明确，具体操作是在TestDB目录下新建WEB-INF，然后新建web.xml，添加下面的内容。
MySQL Test App
DB Connection
jdbc/TestDB
javax.sql.DataSource
Container
4. Test code
Now create a simple test.jsp page for use later.
在TestDB目录下新建test.jsp,添加下面的内容
select id, foo, bar from testdata
DB Test
Results
Foo ${row.foo}
Bar ${row.bar}
That JSP page makes use of JSTL's SQL and Core taglibs. You can get it from Apache Tomcat Taglibs - Standard Tag Library project — just make sure you get a 1.1.x release. Once you have JSTL, （解压后在\jakarta-taglibs-standard-1.1.1\lib）copy jstl.jar and standard.jar to your web app's WEB-INF/lib directory.
Once deployed, point a browser at http://localhost:8080/DBTest/test.jsp to view the fruits of your hard work.
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