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Excerpt: Tomcat Mysql Data Connection Pool

Source: Internet
Author: User
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Body: Go to the Management page and create datasource: JNDI name: JDBC/MySQL
Data source URL: JDBC: mysql: // localhost: 3306/CS
JDBC Driver Class: COM. MySQL. JDBC. Driver
User name: Root
Password :********
Max. Active connections: 4
Max. idle connections: 2
Max. Wait for connection: 5000
Validation query:

% Tomcat_home % \ conf \Web. XML,In</Web-app>Before:
<Resource-ref>
<Description> dB connection </description>
<Res-ref-Name> JDBC/MySQL </RES-ref-Name>
<Res-type> javax. SQL. datasource </RES-type>
<Res-auth> container </RES-auth>

</Resource-ref>

Add

<Resourcelink name = "JDBC/MySQL" Global = "JDBC/MySQL" type = "javax. SQL. Cer CER"/>

 

TestCode

<! Doctype HTML public "-// W3C // dtd html 4.0 transitional // en"

Http://www.w3.org/TR/REC-html40/strict.dtd>

<% @ Page import = "Java. SQL. *" %>

<% @ Page import = "javax. SQL. *" %>

<% @ Page import = "javax. Naming. *" %>

<% @ Page session = "false" %>

<HTML>

<Head>

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

<Title> </title>

<%

Out. Print ("My test started");

Datasource DS = NULL;

Try {

Initialcontext CTX = new initialcontext ();

DS = (datasource) CTX. Lookup ("Java: COMP/ENV/jdbc/MySQL ");

Connection conn = Ds. getconnection ();

Statement stmt = conn. createstatement ();

 //Tip:UsersMust be an existing table in the database,

//The database mentioned aboveData source URLThe database contained in the configuration.

String strsql = "select * from users ";

Resultset rs = stmt.exe cutequery (strsql );

While (Rs. Next ()){

Out. Print (Rs. getstring (1 ));

 }

Out. Print ("My test is complete");

}

Catch (exception ex ){

Out. Print ("Exception: the message is: "+ Ex. getmessage ());

Ex. printstacktrace ();

}

%>

</Head>

<Body>

</Body>

</Html>

Category:JavaRelease date:

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