Boa noite Colegas !
Estou estudando pelo livro Desenvolvendo aplicações com JSP, Servlets, JavaServer Faces… do Edson Gonçalves e estou com problemas para fazer funcionar o exemplo de uso de Pool de Conexões.
Fiz todas as configurações, no entanto ao tentar executar o JSP de exemplo da o seguinte erro, parece problema na conexão.
org.apache.tomcat.dbcp.dbcp.SQLNestedException: Cannot load JDBC driver class 'com.mysql.jdbc.Driver'
at org.apache.tomcat.dbcp.dbcp.BasicDataSource.createDataSource(BasicDataSource.java:1136)
at org.apache.tomcat.dbcp.dbcp.BasicDataSource.getConnection(BasicDataSource.java:880)
at org.apache.jsp.usandoJNDIDB_jsp._jspService(usandoJNDIDB_jsp.java:67)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:98)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:331)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:329)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:265)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:172)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:108)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:174)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:875)
at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:665)
at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:528)
at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:81)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:689)
at java.lang.Thread.run(Unknown Source)
Esse é o JSP:
<%@ page language="java"
contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"
import="java.sql.*, javax.sql.*, javax.naming.InitialContext" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Usando Pool de Conexões</title>
</head>
<body>
<table border="1">
<tr>
<th>ISBN</th><th>Título</th>
</tr>
<%
Connection conn = null;
Statement st = null;
ResultSet rs = null;
try {
InitialContext ctx = new InitialContext();
DataSource ds = (DataSource) ctx.lookup("java:comp/env/jdbc/LivrariaDB");
conn = ds.getConnection();
st = conn.createStatement();
rs = st.executeQuery("Select isbn, titulo from livros");
while (rs.next()) {
%>
<tr>
<td><%= rs.getString("isbn") %></td>
<td><%= rs.getString("titulo") %></td>
</tr>
<%
}
} catch (Exception ex) {
ex.printStackTrace();
} finally {
if (rs != null) rs.close();
if (st != null) st.close();
}
%>
</table>
</body>
</html>
Este é o trecho do arquivo server.xml que o livro manda incluir:
<Context docBase="Livraria" path="/Livraria" reloadable="true" source="org.eclipse.jst.j2ee.server:Livraria">
<Resource name="jdbc/LivrariaDB" auth="Aplication"
type="javax.sql.DataSource"
driverClassName="com.mysql.jdbc.Driver"
url="jdbc:mysql://localhost:3306/livraria"
username="root"
password="adminadmin"
maxActive="30"
maxIdle="20000"
maxWait="120"/>
</Context>
Desculpem o abuso… mas se alguém puder me ajudar, fico muito grato.
[]s
