struts数据库配置
首先在SERVER的LIB中加入：commons-pool-1.2.jar，commons-dbcp-
然后
第一种：在STRUTS—CONFIG.xml中如此配置就可以了
加入SERVLET
<data-sources>
<data-source type="org.apache.commons.dbcp.BasicDataSource">
<set-property
property="driverClassName"
value="com.microsoft.jdbc.sqlserver.SQLServerDriver" />
<set-property
property="url"
value="jdbc:microsoft:sqlserver://127.0.0.1:1433;DatabaseName=test" />
<set-property
property="username"
value="sa" />
<set-property
property="password"
value="xiaohan" />
<set-property
property="maxActive"
value="10" />
<set-property
property="maxWait"
value="5000" />
<set-property
property="defaultAutoCommit"
value="false" />
<set-property
property="defaultReadOnly"
value="false" />
<set-property
property="validationQuery"
value="SELECT COUNT(*) FROM [user]" />
</data-source>
</data-sources>
第二种是如此用：在WEB。XML中配置：
<servlet>
<servlet-name>dbInit</servlet-name>
<servlet-class>emptyprj.jdbc.util.DBInitServlet</servlet-class>
<init-param>
<param-name>driverClass</param-name>
<param-value>com.microsoft.jdbc.sqlserver.SQLServerDriver</param-value>
</init-param>
<init-param>
<param-name>jdbcURL</param-name>
<param-value>jdbc:microsoft:sqlserver://127.0.0.1:1433;DatabaseName=users</param-value>
</init-param>
<init-param>
<param-name>minCount</param-name>
<param-value>1</param-value>
</init-param>
<init-param>
<param-name>maxCount</param-name>
<param-value>10</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
<init-param>
<param-name>user</param-name>
<param-value>xiaohan</param-value>
</init-param>
<init-param>
<param-name>password</param-name>
<param-value>xiaohan</param-value>
</init-param>
</servlet>
这里还要写一个连接数据的接口：
有两个CLASS文件组成：第一个如下：
package emptyprj.jdbc.util;
import java.sql.Connection;
import java.sql.SQLException;
import javax.sql.DataSource;
public class ConnectionPool
{
private DataSource ds;
private static ConnectionPool mySelf;
private ConnectionPool(DataSource datasource)
{
ds = datasource;
}
public static void init(DataSource datasource)
{
mySelf = new ConnectionPool(datasource);
}
public static ConnectionPool getInstance()
{
if(mySelf == null)
throw new IllegalStateException("Pool not initialized.");
else
return mySelf;
}
public Connection getConnection()
throws SQLException
{
return ds.getConnection();
}
}
然后在文件中如此用就可以连了
（request 就是HttpServletRequest）
javax.sql.DataSource ds = null;
ds = getDataSource(request);
Connection conn=ds.getConnection();
第二个：
package emptyprj.jdbc.util;
import java.sql.SQLException;
import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import org.apache.struts.util.GenericDataSource;
// Referenced classes of package emptyprj.jdbc.util:
// ConnectionPool
public class DBInitServlet extends HttpServlet
{
public DBInitServlet()
{
}
public void init(ServletConfig servletconfig)
throws ServletException
{
super.init(servletconfig);
try
{
GenericDataSource genericdatasource = new GenericDataSource();
genericdatasource.setDriverClass(getInitParameter("driverClass"));
genericdatasource.setUrl(getInitParameter("jdbcURL"));
genericdatasource.setMinCount(Integer.parseInt(getInitParameter("minCount")));
genericdatasource.setMaxCount(Integer.parseInt(getInitParameter("maxCount")));
genericdatasource.setAutoCommit(false);
genericdatasource.setUser(getInitParameter("user"));
genericdatasource.setPassword(getInitParameter("password"));
genericdatasource.open();
ConnectionPool.init(genericdatasource);
}
catch(SQLException sqlexception)
{
sqlexception.printStackTrace();
throw new ServletException("Unable to open datasource.");
}
}
}
然后在文件中如此用就可以连了
Connection connection = ConnectionPool.getInstance().getConnection();