测试连接数据库为MS Sql Server 2008
步骤一：去微软下载sqljdbc_4.0
步骤二：无需安装，解压出来，把sqljdbc4.jar包copy to Tomcat的lib目录下
步骤三：将auth目录下的sqljdbc_auth.dll文件copy to c:\windows\system32下。
Servlet代码：
package com.my; import java.io.*; import javax.servlet.*; import javax.servlet.http.*; import java.sql.*; import java.util.List; import java.util.ArrayList; public class Hello extends HttpServlet { public Hello() {} public void doGet(HttpServletRequest req, HttpServletResponse resp) throws IOException { try { Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver"); Connection conn = DriverManager.getConnection("jdbc:sqlserver://127.0.0.1;DatabaseName=DBNAME;integratedSecurity=True;"); Statement stm = conn.createStatement(); ResultSet rs = stm.executeQuery("SELECT TOP 10 * FROM Project"); List<String> list = new ArrayList<String>(); while(rs.next()) { list.add(rs.getString("name")); } rs.close(); stm.close(); PreparedStatement stmPrepare = conn.prepareStatement("SELECT TOP 10 * FROM Project WHERE id=?"); stmPrepare.setInt(1, 1); ResultSet rsPrepare = stmPrepare.executeQuery(); List<String> listPrepare = new ArrayList<String>(); while(rsPrepare.next()) { listPrepare.add(rsPrepare.getString("name")); } rsPrepare.close(); stmPrepare.close(); conn.close(); resp.setContentType("text/html;charset=\"UTF-8\""); PrintWriter pw = resp.getWriter(); pw.print("<html>"); pw.print("<header>"); pw.print("</header>"); pw.print("<body>"); pw.print("<form action=\"\" method=\"\">"); for(int i=0; i<list.size(); i++) { pw.print("<h2>" + list.get(i) + "</h2>"); } for(int i=0; i<listPrepare.size(); i++) { pw.print("<h3>" + listPrepare.get(i) + "</h3>"); } pw.print("</form>"); pw.print("</body>"); pw.print("</html>"); } catch(IOException e) { e.printStackTrace(); } catch(SQLException e) { e.printStackTrace(); } catch(Exception e) { e.printStackTrace(); } } public void doPost(HttpServletRequest req, HttpServletResponse resp) { // } }
web.xml:
<servlet> <servlet-name>hello</servlet-name> <servlet-class>com.my.Hello</servlet-class> </servlet> <servlet-mapping> <servlet-name>hello</servlet-name> <url-pattern>/hello</url-pattern> </servlet-mapping>
原文：http://www.cnblogs.com/HD/p/3623159.html