tomcat+mysql数据库的连接池配置

mysql|数据|数据库

1)下载mm.mysql-2.0.14-bin.jar包，放在tomcat目录下的common/lib文件夹中

2)在tomcat目录下的conf/server.xml中的</Host>前加入(注意:全部大写的地方要替换成你自己的东西)

<!--for mysql database connection pool--><Context path="/APPLICATION_NAME" docBase="APPLICATIOIN_NAME" debug="5" reloadable="true" crossContext="true">  <Logger className="org.apache.catalina.logger.FileLogger" prefix="localhost_DBTest_log." suffix=".txt" timestamp="true"/>          <Resource name="jdbc/DATABASE_NAME" auth="Container" type="javax.sql.DataSource"/>           <ResourceParams name="jdbc/DATABASE_NAME">                      <parameter>                               <name>factory</name>                                  <value>org.apache.commons.dbcp.BasicDataSourceFactory</value>                      </parameter>                                   <!-- Class name for mm.mysql JDBC driver -->                     <parameter>                                    <name>driverClassName</name>                                      <value>org.gjt.mm.mysql.Driver</value>                      </parameter>                                 <!-- The JDBC connection url for connecting to your MySQL dB.                                            The autoReconnect=true argument to the url makes sure that the                                          mm.mysql JDBC Driver will automatically reconnect if mysqld closed                                      the connection.  mysqld by default closes idle connections after 8 hours.-->                     <parameter>                                  <name>url</name>                                <value>jdbc:mysql://localhost:3306/DATABASE_NAME?autoReconnect=true</value>                   </parameter>                                 <!-- MySQL dB username and password for dB connections  -->                     <parameter>                                  <name>username</name>                                   <value>DB_USERNAME</value>                      </parameter>                      <parameter>                                   <name>password</name>                                 <value>DB_PASSWORD</value>                      </parameter>                                 <!-- Maximum number of dB connections in pool. Make sure you                                       configure your mysqld max_connections large enough to handle                                            all of your db connections. Set to 0 for no limit.-->                   <parameter>                                    <name>maxActive</name>                                   <value>100</value>                      </parameter>                                   <!-- Maximum number of idle dB connections to retain in pool.                                       Set to 0 for no limit. -->                     <parameter>                                  <name>maxIdle</name>                                <value>30</value>                   </parameter>                                <!-- Maximum time to wait for a dB connection to become available in ms,                                     in this example 10 seconds. An Exception is thrown if this timeout                                     is exceeded.  Set to -1 to wait indefinitely.-->                      <parameter>                            <name>maxWait</name>                       <value>10000</value>                     </parameter>           </ResourceParams></Context>这样就算连接完了

3)测试:

DATABASE_NAME:testdb

APPLICATION_NAME:mysqlTest

在testdb数据库里新建表userinfo

id   |   username1        aaa2        bbb

4)web.xml

<web-app><resource-ref>  <description>MySQL  Datasource  example</description>  <res-ref-name>jdbc/testdb</res-ref-name>  <res-type>javax.sql.DataSource</res-type>  <res-auth>Container</res-auth> </resource-ref></web-app>

5)index.jsp

<%@ page contentType="text/html;charset=gb2312" language="java" import="java.sql.*,javax.naming.*"%>

<% Context initCtx = new InitialContext();  Context ctx = (Context) initCtx.lookup("java:comp/env");  Object obj = (Object) ctx.lookup("jdbc/testdb");      javax.sql.DataSource ds = (javax.sql.DataSource)obj;  Connection conn = ds.getConnection();  Statement stmt = conn.createStatement();  String strSql = "select * from userinfo";  ResultSet rs = stmt.executeQuery(strSql);%>

<body> <%while(rs.next()){%> <p> <%=rs.getString("username")%> </p> <%}%><body>

可以看到输出结果为:

aaabbb