Tomcat 6.0配置Mysql数据库连接池

         在NetBaen里新建一个Web项目，打开配置文件context.xml，输入以下内容：
     
     <?xml version="1.0" encoding="UTF-8"?>
     <Context crossContext="true"  reloadable="true" path="/nutz_Text">
    <Resource auth="Container" driverClassName="com.mysql.jdbc.Driver" maxActive="50" maxWait="5000" maxldle="10" name=自定义出一个变量名 password=数据库密码  username=数据库管理员type="javax.sql.DataSource" url="jdbc:mysql://localhost:3306/bat?autoReconnect=true"  />
   </Context>


   注：  <Context crossContext="true"  reloadable="true" path="/nutz_Text"> 里不要有antiJARLocking="true",因为antiJARLocking="true"会有一些副作用，包括屏蔽了JSP文件在运行服务器上的重新加载。


   Ok，编写测试程序：
   
  


package com;


import java.io.IOException;
import java.io.PrintWriter;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.sql.*;
//import java.sql.*;
import javax.naming.*;
import org.nutz.Nutz;
import org.nutz.dao.Dao;
import org.nutz.dao.impl.NutDao;
/**
 *
 * @author Administrator
 */
public class NewServlet extends HttpServlet {


    /**
     * Processes requests for both HTTP <code>GET</code> and <code>POST</code> methods.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");
        PrintWriter out = response.getWriter();
        try {
       
          out.print("jiang");
          Context context = new InitialContext();
          DataSource source = (DataSource)context.lookup("java:comp/env/自定义的变量名");
          out.print("jiang");
          Dao dao =new  NutDao(source); //Nutz.dao
          out.print("jiang");
          text p = new text();
          out.print("jiang");
          //p.setAge(20);
          //p.setName("ABC");
         dao.delete(text.class,"ABC");//根据名称删除
//         out.print("删除成功： "+p.getName()+"\n");
          java.util.List<text> list = dao.query(text.class, null, null);
          java.util.Iterator<text> it = list.iterator();
          while(it.hasNext()){
             text tmp =(text)it.next();
             out.print(tmp.getId()+" "+tmp.getName()+" "+tmp.getAge());
             out.print("\n");
          }
        } catch (NamingException ex) {
            //Logger.getLogger(NewServlet.class.getName()).log(Level.SEVERE, null, ex);
            out.print("出错");
        } finally {
            out.close();
        }
    }


    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /**
     * Handles the HTTP <code>GET</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        processRequest(request, response);
    }


    /**
     * Handles the HTTP <code>POST</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        processRequest(request, response);
    }


    /**
     * Returns a short description of the servlet.
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>


}


  启动Tomcat，运行这个Servlet,搞定.....