Actual configuration of MySQL connection pool

Last Update:2013-12-16 Source: Internet

Author: User

Tags mysql connection pool

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The following article describes the actual configuration of the java jsp tomcat6 MySQL connection pool. I recently upgraded tomcat5.5 to tomcat6. I thought it was just a simple upgrade, but unexpectedly, the change between tomcat5 and tomcat6 was quite large.

Here I will talk about some questions I encountered in configuring the MySQL connection pool.

The most obvious change is that the directory structure of Tomcat 5 and tomcat 6 has changed, and the common directory is not found in Tomcat 6. Instead, a lib directory is directly available, next, let's take a look at how Tomcat 6 configures the connection pool.

1. required file: Installation (Installation File)

2. Configure the context. xml file in conf under tomcat, and add the connection pool between <context> </context> as follows:

 
 
  
  <Resource name="jdbc/MySQL"   
  
  auth="Container"   
  
  type="javax.sql.DataSource"   
  
  driverClassName="com.MySQL.jdbc.Driver"   
  
  url="jdbc:MySQL://localhost/test"   
  
  username="root"   
  
  password="root"   
  
  maxActive="100"   
  
  maxIdle="30"   
  
  maxWait="10000" />

I don't need to talk about the above parameters. I know what it means.

3. Configure <web-app> </web-app> in the web. xml file of your application to add:

 
 
  
  Xml Code
  
  <Resource-ref>
  
  <Description> DB Connection </description>
  
  <Res-ref-name> jdbc/MySQLx </res-ref-name>
  
  <Res-type> javax. SQL. DataSource </res-type>
  
  <Res-auth> Container </res-auth>
  
  </Resource-ref>

4. the success is that you do not need to use the original server. after the configuration is in xml, you can write the test program below. There will be a lot on the internet, mainly on the top. Of course, you need to put the connection drivers under the lib under Tomcat 6. the test code is as follows:

Java code

 
 
  
  <! 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: users must be an existing database table,

The database contained in the Data Source URL configuration mentioned above.

 
 
  
  String strSql = "select * from users ";
  
  ResultSet rs = stmt.exe cuteQuery (strSql );
  
  While (rs. next ()){
  
  Out. print (rs. getString (1 ));
  
  }
  
  Out. print ("My test ended ");
  
  }
  
  Catch (Exception ex ){
  
  Out. print ("exception, message:" + ex. getMessage ());
  
  Ex. printStackTrace ();
  
  }
  
  %>
  
  </Head>
  
  <Body>
  
  </Body>
  
  </Html>

The above content is an introduction to the configuration of the java jsp tomcat6 MySQL connection pool. I hope you will gain some benefits.

This article is an English version of an article which is originally in the Chinese language on aliyun.com and is provided for information purposes only. This website makes no representation or warranty of any kind, either expressed or implied, as to the accuracy, completeness ownership or reliability of the article or any translations thereof. If you have any concerns or complaints relating to the article, please send an email, providing a detailed description of the concern or complaint, to info-contact@alibabacloud.com. A staff member will contact you within 5 working days. Once verified, infringing content will be removed immediately.

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