Tomcat配置SQLServer連接池

1. 進入tomcat目錄下的conf文件夾目錄里,找到Server.xml

在tomcat的Server.xml文件中在</Context>標簽與</Host>標簽里,定議連接語句,格式如下

<!—path定議你的應用程序的目錄所 ,/DBTest表示在Tomcat Webapps目錄下à





<!—docBase=”DBTest” 表示你執行止程序時路徑名稱,例如以下的執行路徑就是http://localhost:8080/DBTest-->





<Context path="/DBTest" docBase="DBTest"

debug="5" reloadable="true" crossContext="true">

<!-- maxActive: 連接池的最大數量,要確保有足夠的連接數-->





<!-- maxIdle: 最大空閑連接數,設置為-1即表示不限制-->





<!-- maxWait:最長等待連接時間(最大等待連接池反回可用的時間), 以納秒為單位,即設為10000相等于10秒，如果設置成-1表示不確定-->





<!-- username and password: 連接數據庫使用的帳號與密碼 -->





<!-- driverClassName:連接數據庫的驅動程序,如SQLServer就是





com.microsoft.jdbc.sqlserver.SQLServerDriver.-->





<!-- url: 連接數據庫路徑,如





jdbc:microsoft:sqlserver://localhost:1433;DatabaseName=KB_Rate-->












<Resource name=" Default_JDBC " auth="Container" type="javax.sql.DataSource"

maxActive="100" maxIdle="30" maxWait="10000"

username="javauser" password="javadude"

driverClassName=" com.microsoft.jdbc.sqlserver.SQLServerDriver "

url=" jdbc:microsoft:sqlserver://localhost:1433;DatabaseName=KB_Rate""/>








</Context>








配置完成后,在DBTest目錄下添加一個Test文件,如下:

<%@ page contentType="text/html;charset=gb2312"%>

<%@ page import="java.sql.*"%>

<%@ page import="javax.sql.*"%>

<%@ page import="javax.naming.*"%>

<%

Connection conn = null;

Context initCtx = new InitialContext();

if (initCtx == null)

throw new Exception("不能獲取Context!");

Context ctx = (Context) initCtx.lookup("java:comp/env");

Object obj = (Object) ctx.lookup("/Default_JDBC ");//獲取連接池對象

javax.sql.DataSource ds = (javax.sql.DataSource) obj; //類型轉換

conn = ds.getConnection();

Statement stmt = conn.createStatement();

PreparedStatement ps=conn.prepareStatement("select * from FinalOrderdata");

ResultSet rs=ps.executeQuery();

while(rs.next()){

out.println(rs.getString(1)+"<BR>");

i++;

}

rs.close();

stmt.close();

conn.close();

out.println("連接池測試成功"+i);








到于TOMCAT5.0版本的設置也是差不多,不過在Server.xml中添加連接池設置語句上有所有不,可參考

http://jakarta.apache.org/tomcat/tomcat-5.0-doc/jndi-datasource-examples-howto.html

其它操作也是差不多,

<Context path="/DBTest" docBase="DBTest"

debug="5" reloadable="true" crossContext="true">

<Context path="/DBTest" docBase="DBTest"

debug="5" reloadable="true" crossContext="true">

<Logger className="org.apache.catalina.logger.FileLogger"

prefix="localhost_DBTest_log." suffix=".txt"

timestamp="true"/>

<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>

<!-- 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 -1 for no limit. See also the DBCP documentation on this

and the minEvictableIdleTimeMillis configuration parameter.

-->

<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>

<!-- MySQL dB username and password for dB connections -->

<parameter>

<name>username</name>

<value>javauser</value>

</parameter>

<parameter>

<name>password</name>

<value>javadude</value>

</parameter>

<!-- Class name for the old mm.mysql JDBC driver - uncomment this entry and comment next

if you want to use this driver - we recommend using Connector/J though

<parameter>

<name>driverClassName</name>

<value>org.gjt.mm.mysql.Driver</value>

</parameter>

-->

<!-- Class name for the official MySQL Connector/J driver -->

<parameter>

<name>driverClassName</name>

<value>com.mysql.jdbc.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/javatest?autoReconnect=true</value>

</parameter>

</ResourceParams>

</Context>

有不足的地方,請各為指正!








還有,的就是請大蝦門可以告訴一下小弟,如何設置法才能讓連接池做到最高效,因為我試過用TOMCAT連接池連池,發現比較慢,反應較久,我不知道設錯了那里,,!!我的設置如下:

<Context path="/KB_Rate" docBase="/KB_Rate"

debug="5" reloadable="true" crossContext="true">

<Resource name="Default_JDBC" auth="Container" type="javax.sql.DataSource"

maxActive="100" maxIdle="30" maxWait="10000"

username="sa" password="1234"

driverClassName="com.microsoft.jdbc.sqlserver.SQLServerDriver"

url="jdbc:microsoft:sqlserver://127.0.0.1:1433;DatabaseName=KB_Rate"/>

</Context>

原文轉自：http://www.anti-gravitydesign.com