tomcat中的开发应用系统常见的配置1.设置环境变量
Linux系统，修改catalina.sh和catalina.50.sh
JAVA_HOME=/usr/local/j2sdk1.4.2_06
JAVA_OPTS='-Xms512m -Xmx512m'
CATALINA_HOME=/usr/local/jakarta-tomcat-5.0.28
Windows系统，修改catalina.bat和catalina.50.bat
set JAVA_HOME=D:\j2sdk1.4.2_06
set CATALINA_HOME=D:\jakarta-tomcat-5.0.28
2. 如何加大tomcat连接数
在tomcat配置文件server.xml中的<Connector />配置中，和连接数相关的参数有：
minProcessors：最小空闲连接线程数，用于提高系统处理性能，默认值为10
maxProcessors：最大连接线程数，即：并发处理的最大请求数，默认值为75
acceptCount：允许的最大连接数，应大于等于maxProcessors，默认值为100
enableLookups：是否反查域名，取值为：true或false。为了提高处理能力，应设置为false
connectionTimeout：网络连接超时，单位：毫秒。设置为0表示永不超时，这样设置有隐患的。通常可设置为30000毫秒。
其中和最大连接数相关的参数为maxProcessors和acceptCount。如果要加大并发连接数，应同时加大这两个参数。
web server允许的最大连接数还受制于操作系统的内核参数设置，通常Windows是2000个左右，Linux是1000个左右。tomcat5中的配置示例：
<Connector port="8080"
maxThreads="150" minSpareThreads="25" maxSpareThreads="75"
enableLookups="false" redirectPort="8443" acceptCount="100"
debug="0" connectionTimeout="20000"
disableUploadTimeout="true" />
对于其他端口的侦听配置，以此类推。
3. tomcat中如何禁止列目录下的文件
在{tomcat_home}/conf/web.xml中，把listings参数设置成false即可，如下：
<init-param>
<param-name>listings</param-name>
<param-value>false</param-value>
</init-param>
4.如何加大tomcat可以使用的内存
tomcat默认可以使用的内存为128MB，在较大型的应用项目中，这点内存是不够的，需要调大。
Unix下，在文件{tomcat_home}/bin/catalina.sh的前面，增加如下设置：
JAVA_OPTS='-Xms【初始化内存大小】 -Xmx【可以使用的最大内存】'
需要把这个两个参数值调大。例如：
JAVA_OPTS='-Xms256m -Xmx512m'
表示初始化内存为256MB，可以使用的最大内存为512MB
5. 如何添加默认访问页面
修改文件web.xml，在welcome-file里面加入需要的页面即可。
<welcome-file-list>
<welcome-file>index.html</welcome-file>
<welcome-file>index.htm</welcome-file>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
6. 如何添加出错页面修改文件web.xml，在location里面加入出错页面
<error-page>
<error-code>404</error-code>
<location>/error.jsp</location>
</error-page>
<error-page>
<error-code>500</error-code>
<location>/error.jsp</location>
</error-page>
7.如何配置虚拟主机
为了实现基于域名（IP地址）的虚拟主机，修改文件server.xml，加入以下内容：
<Host appBase="C:/webapp1" name="www.test1.com" unpackWARs="true" autoDeploy="true"
xmlValidation="false" xmlNamespaceAware="false">
<Alias>www.test1.com</Alias>
<Alias>192.168.1.110</Alias>
</Host>
<Host appBase="C:/webapp2" name="www.test2.com" unpackWARs="true" autoDeploy="true"
xmlValidation="false" xmlNamespaceAware="false">
<Alias>www.test2.com</Alias>
<Alias>192.168.1.120</Alias>
</Host>
在conf\Catalina\目录下建立文件夹，文件夹的名称为”www.test1.com”和“www.test2.com”，然后在这两个目录下建立文件ROOT.xml，其“www.test1.com“目录下ROOT.xml内容为：
<?xml version='1.0' encoding='utf-8'?>
<!--
Context configuration file for the test1 App
-->
<Context displayName=www.test1.com path="/" docBase="" useNaming="false">
debug="0" privileged="true" reloadable="true">
<Logger className="org.apache.catalina.logger.FileLogger"
directory="C:/webapp1/WEB-INF/logs" prefix="test1_log."
suffix=".txt" timestamp="true"/>
<Valve className="org.apache.catalina.valves.AccessLogValve"
directory="logs" prefix="test1_access_log." suffix=".txt"
pattern="combined" resolveHosts="false"/>
</Context>
8. 如何配置mysql数据源
在本机建立数据库test，将mysql的JDBC驱动mysql-connector-java-3.0.9-stable-bin.jar拷贝到目录common\lib下，
修改文件web.xml，加入以下内容：
<resource-ref>
<description>MySQL Datasource example</description>
<res-ref-name>jdbc/test</res-ref-name>
<res-type>javax.sql.DataSource</res-type>
<res-auth>Container</res-auth>
</resource-ref>
在WEB应用的配置文件里加入以下内容：
<Resource name="jdbc/test" auth="Container" type="javax.sql.DataSource"/>
<ResourceParams name="jdbc/test">
<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/test?autoReconnect=true</value>
</parameter>
<!-- MySQL dB username and password for dB connections -->
<parameter>
<name>username</name>
<value>root</value>
</parameter>
<parameter>
<name>password</name>
<value></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>
<resource-ref>
<description>MySQL Datasource example</description>
<res-ref-name>jdbc/test</res-ref-name>
<res-type>javax.sql.DataSource</res-type>
<res-auth>Container</res-auth>
</resource-ref>
在WEB应用的配置文件里加入以下内容：
<Resource name="jdbc/test" auth="Container" type="javax.sql.DataSource"/>
<ResourceParams name="jdbc/test">
<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/test?autoReconnect=true</value>
</parameter>
<!-- MySQL dB username and password for dB connections -->
<parameter>
<name>username</name>
<value>root</value>
</parameter>
<parameter>
<name>password</name>
<value></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>9. tomcat连接池的配置
修改文件web.xml，在location里面加入出错页面
<error-page>
<error-code>404</error-code>
<location>/error.jsp</location>
</error-page>
<error-page>
<error-code>500</error-code>
<location>/error.jsp</location>
</error-page>
7.如何配置虚拟主机
为了实现基于域名（IP地址）的虚拟主机，修改文件server.xml，加入以下内容：
<Host appBase="C:/webapp1" name="www.test1.com" unpackWARs="true" autoDeploy="true"
xmlValidation="false" xmlNamespaceAware="false">
<Alias>www.test1.com</Alias>
<Alias>192.168.1.110</Alias>
</Host>
<Host appBase="C:/webapp2" name="www.test2.com" unpackWARs="true" autoDeploy="true"
xmlValidation="false" xmlNamespaceAware="false">
<Alias>www.test2.com</Alias>
<Alias>192.168.1.120</Alias>
</Host>
在conf\Catalina\目录下建立文件夹，文件夹的名称为”www.test1.com”和“www.test2.com”，然后在这两个目录下建立文件ROOT.xml，其“www.test1.com“目录下ROOT.xml内容为：
<?xml version='1.0' encoding='utf-8'?>
<!--
Context configuration file for the test1 App
-->
<Context displayName=www.test1.com path="/" docBase="" useNaming="false">
debug="0" privileged="true" reloadable="true">
<Logger className="org.apache.catalina.logger.FileLogger"
directory="C:/webapp1/WEB-INF/logs" prefix="test1_log."
suffix=".txt" timestamp="true"/>
<Valve className="org.apache.catalina.valves.AccessLogValve"
directory="logs" prefix="test1_access_log." suffix=".txt"
pattern="combined" resolveHosts="false"/>
</Context>
8. 如何配置mysql数据源
在本机建立数据库test，将mysql的JDBC驱动mysql-connector-java-3.0.9-stable-bin.jar拷贝到目录common\lib下，
修改文件web.xml，加入以下内容：
<resource-ref>
<description>MySQL Datasource example</description>
<res-ref-name>jdbc/test</res-ref-name>
<res-type>javax.sql.DataSource</res-type>
<res-auth>Container</res-auth>
</resource-ref>
在WEB应用的配置文件里加入以下内容：
<Resource name="jdbc/test" auth="Container" type="javax.sql.DataSource"/>
<ResourceParams name="jdbc/test">
<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/test?autoReconnect=true</value>
</parameter>
<!-- MySQL dB username and password for dB connections -->
<parameter>
<name>username</name>
<value>root</value>
</parameter>
<parameter>
<name>password</name>
<value></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>
<resource-ref>
<description>MySQL Datasource example</description>
<res-ref-name>jdbc/test</res-ref-name>
<res-type>javax.sql.DataSource</res-type>
<res-auth>Container</res-auth>
</resource-ref>
在WEB应用的配置文件里加入以下内容：
<Resource name="jdbc/test" auth="Container" type="javax.sql.DataSource"/>
<ResourceParams name="jdbc/test">
<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/test?autoReconnect=true</value>
</parameter>
<!-- MySQL dB username and password for dB connections -->
<parameter>
<name>username</name>
<value>root</value>
</parameter>
<parameter>
<name>password</name>
<value></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>9. tomcat连接池的配置
<Resource name="jdbc/testDB" auth="Container"
type="javax.sql.DataSource"/>
<ResourceParams name="jdbc/testDB">
<parameter>
<name>factory</name>
<value>org.apache.commons.dbcp.BasicDataSourceFactory</value>
</parameter>
<parameter>
<name>driverClassName</name>
<value>com.microsoft.jdbc.sqlserver.SQLServerDriver</value>
</parameter>
<parameter>
<name>url</name>
<value>jdbc:microsoft:sqlserver://218.246.85.65:1433;DatabaseName=ZCMIS</v
alue>
</parameter>
<parameter>
<name>username</name>
<value>sa</value>
</parameter>
<parameter>
<name>password</name>
<value>sa</value>
</parameter>
<parameter>
<name>maxActive</name>
<value>30</value>
</parameter>
<parameter>
<name>maxIdle</name>
<value>10</value>
</parameter>
<parameter>
<name>maxWait</name>
<value>1000</value>
</parameter>
</ResourceParams>
把下面的东西加到web.xml中
<resource-ref>
<description>DB Connection</description>
<res-ref-name>jdbc/testDB</res-ref-name>
<res-type>javax.sql.DataSource</res-type>
<res-auth>Container</res-auth>
</resource-ref>
类的内部实现
try{
Context initCtx = new InitialContext();
Context ctx = (Context) initCtx.lookup("java:comp/env");
//获取连接池对象
Object obj = (Object) ctx.lookup("jdbc/testDB");
javax.sql.DataSource ds = (javax.sql.DataSource)obj;
Connection conn = ds.getConnection();
}
catch(Exception e)
{
System.out.print(e.toString());
}
[url=http://blog.csdn.net/wangyin5200/][/url]
