1.从http://www.microsoft.com/downloads/details.aspx?FamilyID=4f8f2f01-1ed7-4c4d-8f7b-3d47969e66ae&DisplayLang=en#filelist下载"Microsoft SQL Server 2000 Driver for JDBC",并安装,得到msbase.jar,mssqlserver.jar和msutil.jar三个文件,将三个文件COPY到TOMCAT 4.1下common\lib文件夹中
2.在TOMCAT 4.1的SERVER.XML中HOST域中添加如下代码
<Context path="/myweb" docBase="myweb" debug="0" reloadable="true" crossContext="true">
<Resource name="jdbc/mydb" auth="Container" type="javax.sql.DataSource"/>
<ResourceParams name="jdbc/mydb">
<parameter>
<name>factory</name>
<value>org.apache.commons.dbcp.BasicDataSourceFactory</value>
</parameter>
<parameter>
<name>maxActive</name>
<value>100</value>
</parameter>
<parameter>
<name>maxIdle</name>
<value>30</value>
</parameter>
<parameter>
<name>maxWait</name>
<value>10000</value>
</parameter>
<parameter>
<name>username</name>
<value>sa</value>
</parameter>
<parameter>
<name>password</name>
<value>你的密码</value>
</parameter>
<parameter>
<name>driverClassName</name>
<value>com.microsoft.jdbc.sqlserver.SQLServerDriver</value>
</parameter>
<parameter>
<name>url</name>
<value>jdbc:microsoft:sqlserver://127.0.0.1:1433;DatabaseName=pubs</value>
</parameter>
</ResourceParams>
</Context>
3.在webapps下新建文件夹"myweb","myweb\WEB-INF","myweb\WEB-INF\classes"
4.在WEB-INF下新建文件"web.xml",并添加如下内容
<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE web-app PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
"http://java.sun.com/dtd/web-app_2_3.dtd">
<web-app>
<display-name>My Web</display-name>
<servlet-mapping>
<servlet-name>invoker</servlet-name>
<url-pattern>/servlet/*</url-pattern>
</servlet-mapping>
<resource-ref>
<res-ref-name>jdbc/mydb</res-ref-name>
<res-type>javax.sql.DataSource</res-type>
<res-auth>Container</res-auth>
</resource-ref>
</web-app>
5.编写servlet程序JDBCPoolServ.java
import java.sql.*;
import javax.naming.Context;
import javax.sql.DataSource;
import javax.naming.InitialContext;
import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
public class JDBCPoolServ extends HttpServlet
{
public void doGet(HttpServletRequest request,
HttpServletResponse response) throws ServletException,IOException {
DataSource ds=null;
Connection con=null;
String val="null",title="JDBC Pooling Test";
try{
Context initCtx = new InitialContext();
if(initCtx == null )
throw new Exception("Boom - No Context");
ds = (DataSource)initCtx.lookup(
"java:comp/env/jdbc/mydb");
if (ds != null){
con = ds.getConnection();
if (con != null){
Statement stmt=con.createStatement();
ResultSet rs=stmt.executeQuery("select * from authors");
rs.next();
val=rs.getString("au_id");
rs.close();
stmt.close();
}
con.close();
}
}
catch(Exception ex){
System.out.println(ex.getMessage());
}
response.setContentType("text/html");
PrintWriter out = response.getWriter();
out.println("<html>");
out.println("<head>");
out.println("<title>" + title + "</title>");
out.println("</head>");
out.println("<body bgcolor=\"white\">");
out.println("<h1>" + val + "</h1>");
out.println("</body>");
out.println("</html>");
}
}
6.编译JDBCPoolServ.java得到JDBCPoolServ.class(注意加入servlet.jar包),将其COPY到"myweb\WEB-INF\classes"下
7.启动SQL SERVER2000
8.启动TOMCAT
9.浏览http://127.0.0.1:8080/myweb/servlet/JDBCPoolServ
10.在IE中可看到"172-32-1176"
注意:如果无法正常运行请检查以上文件夹名,URL和JAVA类名大小写是否一致
BluePenguin
2003-2-11
