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Correct configuration of java jsp tomcat6 MySQL connection pool

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Author: User
Tags mysql connection pool
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The following articles mainly describe the correct configuration of the java jsp tomcat6 MySQL connection pool. Many people use Tomcat 5 to configure the java jsp tomcat6 MySQL connection pool, however, I personally think it is too time-consuming to use Tomcat 5. Now I will share the following:

1. required file: Installation (Installation File)

2. Configure the context. xml file under conf under tomcat, and add the java jsp tomcat6 MySQL connection pool between <context> </context> as follows:

 
 
    
  
  
  1. <Resource name="jdbc/MySQL"   
    2. 
  
  
  2. auth="Container"   
    3. 
  
  
  3. type="javax.sql.DataSource"   
    4. 
  
  
  4. driverClassName="com.MySQL.jdbc.Driver"   
    5. 
  
  
  5. url="jdbc:MySQL://localhost/test"   
    6. 
  
  
  6. username="root"   
    7. 
  
  
  7. password="root"   
    8. 
  
  
  8. maxActive="100"   
    9. 
  
  
  9. maxIdle="30"   
    10. 
  
  
  10. maxWait="10000" />   
    11. 
  
  
  11.  
    12.

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:

 
 
    
  
  
  1. Xml Code <resource-ref>
    2. 
  
  
  2. <Description> DB Connection </description>
    3. 
  
  
  3. <Res-ref-name> jdbc/MySQLx </res-ref-name>
    4. 
  
  
  4. <Res-type> javax. SQL. DataSource </res-type>
    5. 
  
  
  5. <Res-auth> Container </res-auth>
    6. 
  
  
  6. </Resource-ref>
    7.

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:

 
 
    
  
  
  1. Java code <! Doctype html public "-// w3c // dtd html 4.0 transitional // en"
    2. 
  
  
  2. Http://www.w3.org/TR/REC-html40/strict.dtd>
    3. 
  
  
  3. <% @ Page import = "java. SQL. *" %>
    4. 
  
  
  4. <% @ Page import = "javax. SQL. *" %>
    5. 
  
  
  5. <% @ Page import = "javax. naming. *" %>
    6. 
  
  
  6. <% @ Page session = "false" %>
    7. 
  
  
  7. <Html>
    8. 
  
  
  8. <Head>
    9. 
  
  
  9. <Meta http-equiv = "Content-Type" content = "text/html; charset = gb2312">
    10. 
  
  
  10. <Title> </title>
    11. 
  
  
  11. <%
    12. 
  
  
  12. Out. print ("My test started ");
    13. 
  
  
  13. DataSource ds = null;
    14. 
  
  
  14. Try {
    15. 
  
  
  15. InitialContext ctx = new InitialContext ();
    16. 
  
  
  16. Ds = (DataSource) ctx. lookup ("java: comp/env/jdbc/MySQL ");
    17. 
  
  
  17. Connection conn = ds. getConnection ();
    18. 
  
  
  18. Statement stmt = conn. createStatement ();
    19.

Tip: users must be an existing database table,

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

 
 
    
  
  
  1. String strSql = "select * from users ";
    2. 
  
  
  2. ResultSet rs = stmt.exe cuteQuery (strSql );
    3. 
  
  
  3. While (rs. next ()){
    4. 
  
  
  4. Out. print (rs. getString (1 ));
    5. 
  
  
  5. }
    6. 
  
  
  6. Out. print ("My test ended ");
    7. 
  
  
  7. }
    8. 
  
  
  8. Catch (Exception ex ){
    9. 
  
  
  9. Out. print ("exception, message:" + ex. getMessage ());
    10. 
  
  
  10. Ex. printStackTrace ();
    11. 
  
  
  11. }
    12. 
  
  
  12. %>
    13. 
  
  
  13. </Head>
    14. 
  
  
  14. <Body>
    15. 
  
  
  15. </Body>
    16. 
  
  
  16. </Html>
    17.

I have tested the above. If you have any questions, please leave a message. The above content is an introduction to the configuration of the java jsp tomcat6 MySQL connection pool. I hope you will gain some benefits.


 

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