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>
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