时间:2021-07-01 10:21:17 帮助过:21人阅读
先说一点题外话,LZ最近学习java web。今天刚看到hibernate,发现在hibernate配置数据源时网上的资料都太久远了,一般以tomcat 5 版本下的配置居多。而tomcat 7下的配置略有变化,新手找资料困难,可能会略受打击,故整理资料与大家共享,也可作备忘之用!若有不当之处,还请不吝赐教!
1.添加数据库驱动包mysql-connector-java-5.1.13-bin.jar加入到tomcat目录下的lib包中。
注意:网上几乎所有版本都说需要添加commons-dbcp-1.4.jar,commons-pool-1.5.4.jar和commons-collections.jar。
但是tomcat 7 已经不用添加这些jar文件了,因为tomcat 7的lib包下面已经集成了这些库。
官方集成文档上有:These libraries are located in a single JAR at$CATALINA_HOME/lib/tomcat-dbcp.jar.
大概意思就是:这些库文件都位于一个单独的JAR文件中,该文件的路径是/lib/tomcat-dbcp.jar。
2.修改Tomcat_Home/conf/server.xml,标签之前加入:
username="javauser" password="javadude" driverClassName="com.mysql.jdbc.Driver"
url="jdbc:mysql://localhost:3306/javatest"/>
3.在context.xml中加入引用
type="javax.sql.DataSource"/>
4.在你的工程项目的web.xml中加入
5.在hibernate.cfg.xml文件中配置数据库连接,这个有很多教程,此处便不再详述。
另外,注意数据源只有在web项目中才可以使用。
再次出来写个简单的servlet来输出hibernate 的session对象:
代码如下:
packagecom.amaker.servlet;
importjava.io.IOException;
importjava.io.PrintWriter;
importjavax.servlet.ServletException;
importjavax.servlet.http.HttpServlet;
importjavax.servlet.http.HttpServletRequest;
importjavax.servlet.http.HttpServletResponse;
importorg.hibernate.Session;
importcom.amaker.util.HibernateUtil;
@SuppressWarnings("serial")
publicclasstestServletextendsHttpServlet {
* Constructor of the object.
publictestServlet() {
super();
* Destruction of theservlet.
publicvoiddestroy() {
super.destroy();// Just puts "destroy" string in log
* The doGet method of theservlet.
* This method is called when a form has its tag value method equals to get.
*@paramrequest the request send by the client to the server
*@paramresponse the response send by the server to the client
*@throwsServletException if an error occurred
*@throwsIOException if an error occurred
publicvoiddoGet(HttpServletRequest request, HttpServletResponse response)
throwsServletException, IOException {
HibernateUtil util =newHibernateUtil();
//HibernateUtil 类用来返回一个Session
对象,很简单,相信大家可以搞定。
response.setContentType("text/html");
PrintWriter out = response.getWriter();
out.println("");
out.println("");
out.println("
out.println("
");out.println(" ");
out.println("");
publicvoiddoPost(HttpServletRequest request, HttpServletResponse response)
throwsServletException, IOException {
doGet(request, response);
* Initialization of theservlet.
*@throwsServletException if an error occurs
publicvoidinit()throwsServletException {
}
访问结果如图,返回一个session对象。
原文地址:http://blog.csdn.net/canglangwenyue/article/details/25924735