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來源：http://www.blogjava.net/biiau/archive/2008/04/16/193513.html

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配置Struts數據源有很多種方法，我們這里講解最實用的一種。

配置數據源所需要的JAR包：commons-dbcp-1.2.2.jar、commons-pool-1.4.jar、struts-legacy.jar
下載地址：
http://www.blogjava.net/Files/biiau/struts-dataSource.rar

1.配置struts-config.xml文件，加入數據源

<!-- ============ Data Source Start ================== -->
?<data-sources>
??<data-source key="org.apache.struts.action.DATA_SOURCE"
???type="org.apache.commons.dbcp.BasicDataSource">
???<set-property property="autoCommit" value="true" />
???<set-property property="description"??value="SQL2000 Data Source" />
???<set-property property="driverClassName"
????value="net.sourceforge.jtds.jdbc.Driver" />
???<set-property property="maxCount" value="10" />
???<set-property property="minCount" value="2" />
???<set-property property="username" value="username" />
???<set-property property="password" value="password" />
???<set-property property="url"
????value="jdbc:jtds:sqlserver://localhost:1433/databaseName" />
??</data-source>
?</data-sources>
<!-- ============ Data Source End ================== -->

2.添加STRUTS插件；添加插件的目的是：任何文件中都可以用到此數據源

首先創建插件，它繼承自org.apache.struts.action.PlugIn?????

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package?com.xxx.db;

import?java.sql.Connection;
import?java.sql.PreparedStatement;
import?java.sql.ResultSet;
import?java.sql.SQLException;
import?java.sql.Statement;

import?javax.sql.DataSource;

import?org.apache.struts.action.ActionServlet;
import?org.apache.struts.action.PlugIn;
import?org.apache.struts.config.ModuleConfig;

public?class?DBConn?implements?PlugIn?{

?private?static?DataSource?dataSource?=?null;
?private?Connection?conn?=?null;
?private?PreparedStatement?preStmt?=?null;
?private?Statement?stmt?=?null;

?//?得到數據源
?public?void?init(ActionServlet?servlet,?ModuleConfig?config)?{
??dataSource?=?(DataSource)?servlet.getServletContext().getAttribute(
????"org.apache.struts.action.DATA_SOURCE");
?}

?public?DBConn()?throws?SQLException?{
??if?(dataSource?!=?null)?{
???conn?=?dataSource.getConnection();
??}
?}

?public?ResultSet?executeQuery(String?sql)?{
??ResultSet?rs?=?null;

??try?{
???if?(stmt?==?null)?{
????stmt?=?conn.createStatement();
???}

???rs?=?stmt.executeQuery(sql);
??}?catch?(SQLException?e)?{
???e.printStackTrace();
??}

??return?rs;
?}

?public?void?executeUpdate(String?sql)?throws?SQLException?{
??if?(stmt?==?null)?{
???stmt?=?conn.createStatement();
??}

??stmt.executeUpdate(sql);
?}

?public?Connection?getConnection()?{
??return?conn;
?}

?public?void?prepareStatement(String?sqlStr)?throws?SQLException?{
??preStmt?=?conn.prepareStatement(sqlStr);
?}

?public?void?setString(int?index,?String?value)?throws?SQLException?{
??preStmt.setString(index,?value);
?}

?public?void?setInt(int?index,?int?value)?throws?SQLException?{
??preStmt.setInt(index,?value);
?}

?public?void?setBoolean(int?index,?boolean?value)?throws?SQLException?{
??preStmt.setBoolean(index,?value);
?}

?public?void?setLong(int?index,?long?value)?throws?SQLException?{
??preStmt.setLong(index,?value);
?}

?public?void?setFloat(int?index,?float?value)?throws?SQLException?{
??preStmt.setFloat(index,?value);
?}

?public?void?setBytes(int?index,?byte[]?value)?throws?SQLException?{
??preStmt.setBytes(index,?value);
?}

?public?void?clearPreStmt()?throws?SQLException?{
??preStmt.clearParameters();
??preStmt?=?null;
?}

?public?ResultSet?executeQuery()?throws?SQLException?{
??if?(preStmt?!=?null)?{
???return?preStmt.executeQuery();
??}?else?{
???return?null;
??}
?}

?public?void?executeUpdate()?throws?SQLException?{
??if?(preStmt?!=?null)?{
???preStmt.executeUpdate();
??}
?}

?public?void?close()?{
??try?{
???if?(stmt?!=?null)?{
????stmt.close();
????stmt?=?null;
???}

???if?(preStmt?!=?null)?{
????preStmt.close();
????preStmt?=?null;
???}

???if?(conn?!=?null)?{
????conn.close();
????conn?=?null;
????System.out.println("****?a?connection?is?closed?****");
???}
??}?catch?(Exception?e)?{
???System.err.println(e.getMessage());
??}
?}

?public?void?destroy()?{
?}
}

然后配置struts-config.xml文件：
???????? <plug-in className="com.xxx.db.DBConn"></plug-in>

3.到此，數據源完成。用法示例：
??????? Connection conn =? new DBCon().getConnection();

總結

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