If you are using myeclipse, it is very simple and only takes three steps.
First, find the context. xml configuration file in the directory where you install Tomcat. The path is [D: \ Program Files \ apachesoftware Foundation \ Tomcat 6.0 \ conf \ context. xml]
Modify the file and add the following
<Resource name="jdbc/mldn" auth="Container" type="javax.sql.DataSource" maxActive="100" maxIdle="30" maxWait="10000" username="root" password="690811" driverClassName="org.gjt.mm.mysql.Driver" url="jdbc:mysql://localhost:3306/mldn"/>
Attribute description:
Name, data source name, usually in the format of "JDBC/XXX;
Type, "javax. SQL. datasource ";
Password: the password of the database user;
Driveclassname, database driver; (commonly used, MySQL is "com. mySQL. JDBC. driver "; oracle is" Oracle. JDBC. driver. oracledriver "; ms SQL is" ")
Maxidle, maximum number of idle instances, and maximum idle time for database connection. When the idle time is exceeded, the database connection is marked as unavailable and then released. If it is set to 0, there is no limit.
Maxactive: the maximum number of database connections in the connection pool. If it is set to 0, there is no limit.
Maxwait, maximum connection wait time. If this time is exceeded, an exception occurs. If it is set to-1, there is no limit.
2. Configure the Web. xml file under the project
<resource-ref> <description>DBConnection</description> <res-ref-name>jdbc/mldn</res-ref-name> <res-type>javax.sql.DataSource</res-type> <res-auth>Container</res-auth> </resource-ref>
Third: place the Third-Party driver connecting to the database under [my path is D: \ ProgramFiles \ Apache Software Foundation \ Tomcat 6.0 \ Lib ].
So far OK.
However, after my detection, I found that for the first step, if you do not use myeclipse, you can configure the project path by yourself.
Find the server. xml file. My path is [D: \ Program Files \ apache softwarefoundation \ Tomcat 6.0 \ conf \ Server. xml]
Modify the file as follows:
<Context path="/mars"docBase="E:\Workspace_myeclipse\DemoMLDN"reloadable="true"> <Resource name="jdbc/mldn" auth="Container" type="javax.sql.DataSource" maxActive="100" maxIdle="30" maxWait="10000" username="root" password="690811" driverClassName="org.gjt.mm.mysql.Driver" url="jdbc:mysql://localhost:3306/mldn"/></Context>
The modification here means that knowledge is only for the connection pool configured for a web project.
This configuration method is not only cumbersome but also prone to configuration errors. We recommend that you do not use this method.
Then, let us know the test procedure.
The test procedure is as follows: a simple JSP file
<% @ Page import = "Java. SQL. connection "%> <% @ page import =" javax. SQL. datasource "%> <% @ page import =" javax. naming. initialcontext "%> <% @ page import =" javax. naming. context "%> <% @ page contenttype =" text/html "pageencoding =" GBK "%> <HTML>The running result is:
JDBC: mysql: // localhost: 3306/mldn, username = root @ localhost, MySQL-AB JDBC driver
This can also be done for Oracle. There are many examples on the Internet. You can find them.
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