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hibernate 在tomcat7.X 下配置mysql数据源_MySQL

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Release: 2016-06-01 13:14:07
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Tomcat7HibernateTomcat

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:

                  maxActive="100" maxIdle="30" maxWait="10000"
               username="javauser" password="javadude" driverClassName="com.mysql.jdbc.Driver"
               url="jdbc:mysql://localhost:3306/javatest"/>

3.在context.xml中加入引用


 name="jdbc/TestDB" global="jdbc/TestDB"    
type="javax.sql.DataSource"/> 

4.在你的工程项目的web.xml中加入

     
        tomcat datasource test,one mysql datasource  
        jdbc/TestDB  
        javax.sql.DataSource  
        Container  
   

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(""-//W3C//DTD HTML 4.01 Transitional//EN/">");

out.println("");

out.println(" 

A Servlet");

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

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