各位大家好，我的关于tomcat 和sqlsever2005链接池总是搞不定，困扰我好几天了，请大家给看一下代码如下：
项目目录META-INF下的context.xlm的如下：
<?xml version="1.0" encoding="UTF-8" ?>
WEB-INF/web.xml
maxActive="100" maxIdle="30" maxWait="10000"
username="sa" password="123"
driverClassName="com.microsoft.jdbc.sqlserver.SQLServerDriver"
url="jdbc:sqlserver://localhost:1433;DatabaseName=wxshop"/>
WEB-INF目录下的web.xml的代码内容如下：
wxshop
SQL Server Datasource
jdbc/sqlserver
javax.sql.DataSource
Container
java 链接类的代码如下：
package com.wxshop.db;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.NamingException;
import javax.sql.DataSource;
import com.wxshop.common.Constants;
/**
- 数据库连接类
- @author roy * */
public class DbUtil {
private static DbUtil db = null;
private static DataSource ds = null;
private DbUtil()
{
}
/**
* 获取数据库连接对象的实例
* @return
*/
public static DbUtil getInstance(){
if(db == null)
{
db = new DbUtil();
}
return db;
}
/**
* 获得数据库连接
* @return
*/
public static Connection getConnection() {
Connection conn = null;
try {
Context initCtx = new InitialContext();
if (ds == null) {
ds = (DataSource) initCtx.lookup("java:comp/env/jdbc/"+Constants.DB_POOL_NAME);
if(null != ds)
{
System.out.println("获得数据源成功!");
}else
{
System.out.println("获得数据源失败!");
}
}
if(conn == null)
{
conn = ds.getConnection();
System.out.println("获取数据库连接成功!");
}
} catch (NamingException e) {
System.out.println("【DbUtil-getConnection()】命名错误!");
e.printStackTrace();
}catch(SQLException e)
{
e.printStackTrace();
System.out.println("【DbUtil-getConnection()】获取数据库连接发生错误!");
}
return conn;
}
/**
* 关闭数据库连接
* @param conn
* @param stmt
* @param rs
* @return
*/
public static boolean close(Connection conn,Statement stmt,ResultSet rs)
{
boolean isClose=false;
//关闭ResultSet
try{
if(rs != null){
rs.close();
rs=null;
}
}catch(SQLException ex)
{
rs=null;
isClose=false;
System.out.println(ex.getMessage());
System.out.println("关闭结果集发生错误!");
}
//关闭Statement
try{
if(stmt!=null){
stmt.close();
stmt=null;
}
}catch(SQLException ex)
{
stmt=null;
isClose=false;
System.out.println(ex.getMessage());
System.out.println("关闭stmt发生错误!");
}
//关闭Connection
try{
if(conn!=null){
conn.close();
conn=null;
}
}catch(SQLException ex)
{
conn=null;
isClose=false;
System.out.println(ex.getMessage());
System.out.println("关闭数据库连接发生错误!");
}
return isClose;
}
}
还有一个java类的代码如下：
package com.wxshop.common;
/**
- @author Administrator
-
2012-09
/
public class Constants {
/** 缩略字段个数 */
public static final int CONTENT_PRE_NUMS = 168;
public static final String DEFAULT_ADVISORY_DOMAIN_CLASS = "747";public static final String path="/wxshop";
public static final String DB_POOL_NAME = "wxshop";
public static final String CSS_NAME = "css";
public static final int MAX_ROW = 14;
public static final int MAX_ROW_NORAML = 10;
public static final int MAX_ROW_ZYX = 14;
public static final int COUNT_ROW = 12;
public static final String dirverName="com.microsoft.sqlserver.jdbc.SQLServerDriver";
public static final String dburl="jdbc:sqlserver://localhost:1433;DatabaseName=wxshop?&useUnicode=true&characterEncoding=UTF-8";
public static final String userName="sa";
public static final String userPwd="123";
public static final String LOTSYS_CHARSET = "UTF-8";
public static final String LOTSYS_VERSION = "1.0";
public static final int HSEDU_RELEASE = 20120922;
public static final String UPLOAD_PATH="upload";
//邮件
public static final String SMTP_HOST = "mail.126.com";
public static final String MAIL_USER = "sun@126.com";
public static final String MAIL_PWD = "111111";/**
- 日期格式 */ public static final String DATE_FORMAT = "yyyy-mm-dd";
public static final String MONTH_DAY = "M/d";
public static final String DATE_TIME_FULL = "yyyy-MM-dd HH:mm:ss";
public static final String DATE_TIME_NO_SECOND = "yyyy-MM-dd HH:mm";
public static final String DATE_TIME_FULL_2 = "yyMMddHHmmss";
public static final String DATE_PART = "yyMMdd";
public static final String DATE_PART_2 = "yyyy-MM-dd";
public static final String YEAR = "yyyy";
public static final String MONTH = "MM";
public static final String MONTH_2 = "M";
public static final String DAY = "dd";
public static final String DAY_2 = "d";
public static final String HOUR = "H";
public static final String MINUTE = "m";
public static final String MARK_NULL = "";
}
测试链接池jsp的代码如下：
<%@ page language="java" contentType="text/html; charset=utf-8" pageEncoding="utf-8"%>
<%@ page import="com.wxshop.db.DbUtil,java.sql.*" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
测试数据库连接池
<%
//获取连接对象
Connection conn = DbUtil.getInstance().getConnection;
//获取语句执行对象
Statement stmt = conn.createStatement();
String sql = "select * from t_user";
//执行语句，获取结果集对象
ResultSet rs = stmt.executeQuery(sql);
String id = "";
String username = "";
String password = "";
out.println("<table border=\"1\" cellspacing=\"0\" cellspadding=\"0\">");
out.println("<tr><td>编号</td><td>用户名称</td><td>用户密码</td>");
while(rs.next())
{
id = rs.getString(1);
username = rs.getString("username");
password = rs.getString("password");
out.println("<tr><td>");
out.println(id+"</td><td>"+username+"</td><td>"+password);
out.println("</td></tr>");
}
out.println("</table>");
DbUtil.close(conn, stmt, rs);
%>
劳驾热心的兄弟姐妹们了。
