部署在Tomcat上的Java应用程序未连接到jdbcmysql

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我正在尝试恢复我们的tomcat服务器，但是有一个应用程序没有正确连接到MySQL

下面是正在发生的事情：

我有一个Java+Flex应用程序。整个应用程序被放在一个目录中（不是.war文件）

$TOMCAT_WEBAPP/myflex_app/WEB-INF/lib/ -> JDBC mysql driver goes here.

这是我的应用程序配置：

<database> <rpgByMoodle user="moodle" password="moodle"> <url>jdbc:mysql://localhost:3306/rpgbymoodle</url> </rpgByMoodle> <moodle user="moodle" password="moodle"> <url>jdbc:mysql://localhost:3306/moodle</url> </moodle> </database>

因此，我可以通过命令行客户端连接mysql，但应用程序不能

我在网上发现有人告诉我使用一些Netbeans（或Eclipse）菜单“添加新连接”。。但是，我没有访问应用程序的源代码

我正在Linux上运行tomcat。我在/var/log/tomcat6/检查了tomcat日志文件，没有发现任何关于jdbc的信息

我的catalina日志：

Aug 4, 2011 9:24:25 AM org.apache.catalina.core.StandardEngine start INFO: Starting Servlet Engine: Apache Tomcat/6.0.20 Aug 4, 2011 9:24:26 AM org.apache.coyote.http11.Http11Protocol start INFO: Starting Coyote HTTP/1.1 on http-8080 Aug 4, 2011 9:24:26 AM org.apache.catalina.startup.Catalina start INFO: Server startup in 977 ms

# 1 楼答案

我以前也遇到过同样的问题，并设法解决了它。 Apache需要额外的jdbc msql配置步骤。首先，确保为SQL数据库设置了正确的授予权限

接下来，遵循他的解决方案，该解决方案取自：http://dev.mysql.com/doc/refman/5.0/en/connector-j-usagenotes-j2ee.html#connector-j-usagenotes-tomcat

首先，安装。jar文件，它与$CATALINA_HOME/common/lib中的Connector/J一起提供，以便容器中安装的所有应用程序都可以使用它

接下来，通过向$CATALINA_HOME/conf/server添加声明资源来配置JNDI数据源。定义web应用程序的上下文中的xml：

<Context ....>

...

<Resource name="jdbc/MySQLDB"
           auth="Container"
           type="javax.sql.DataSource"/>

<!  The name you used above, must match _exactly_ here!

   The connection pool will be bound into JNDI with the name
   "java:/comp/env/jdbc/MySQLDB"
 >

<ResourceParams name="jdbc/MySQLDB">
<parameter>
  <name>factory</name>
  <value>org.apache.commons.dbcp.BasicDataSourceFactory</value>
</parameter>

<!  Don't set this any higher than max_connections on your
     MySQL server, usually this should be a 10 or a few 10's
     of connections, not hundreds or thousands  >

<parameter>
  <name>maxActive</name>
  <value>10</value>
</parameter>

<!  You don't want to many idle connections hanging around
     if you can avoid it, only enough to soak up a spike in
     the load  >

<parameter>
  <name>maxIdle</name>
  <value>5</value>
</parameter>

<!  Don't use autoReconnect=true, it's going away eventually
     and it's a crutch for older connection pools that couldn't
     test connections. You need to decide whether your application
     is supposed to deal with SQLExceptions (hint, it should), and
     how much of a performance penalty you're willing to pay
     to ensure 'freshness' of the connection  >

<parameter>
  <name>validationQuery</name>
  <value>SELECT 1</value> <  See discussion below for update to this option  >
</parameter>

<!  The most conservative approach is to test connections
    before they're given to your application. For most applications
    this is okay, the query used above is very small and takes
    no real server resources to process, other than the time used
    to traverse the network.

    If you have a high-load application you'll need to rely on
    something else.  >

 <parameter>
  <name>testOnBorrow</name>
  <value>true</value>
 </parameter>

 <!  Otherwise, or in addition to testOnBorrow, you can test
    while connections are sitting idle  >

  <parameter>
   <name>testWhileIdle</name>
   <value>true</value>
  </parameter>

 <!  You have to set this value, otherwise even though
     you've asked connections to be tested while idle,
     the idle evicter thread will never run  >

 <parameter>
   <name>timeBetweenEvictionRunsMillis</name>
   <value>10000</value>
 </parameter>

 <!  Don't allow connections to hang out idle too long,
     never longer than what wait_timeout is set to on the
     server...A few minutes or even fraction of a minute
     is sometimes okay here, it depends on your application
     and how much spikey load it will see  >

<parameter>
  <name>minEvictableIdleTimeMillis</name>
  <value>60000</value>
</parameter>

<!  Username and password used when connecting to MySQL  >

<parameter>
 <name>username</name>
 <value>someuser</value>
</parameter>

<parameter>
 <name>password</name>
 <value>somepass</value>
</parameter>

<!  Class name for the Connector/J driver  >

<parameter>
   <name>driverClassName</name>
   <value>com.mysql.jdbc.Driver</value>
</parameter>

<!  The JDBC connection url for connecting to MySQL, notice
     that if you want to pass any other MySQL-specific parameters
     you should pass them here in the URL, setting them using the
     parameter tags above will have no effect, you will also
     need to use &amp; to separate parameter values as the
     ampersand is a reserved character in XML  >

<parameter>
  <name>url</name>
  <value>jdbc:mysql://localhost:3306/test</value>
</parameter>

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部署在Tomcat上的Java应用程序未连接到jdbcmysql

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