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I’m using the driver JDBC from microsoft 6.0 in a design of an API using Java (JRE 1.8) with resteasy using Eclipse Oxygen and Tomcat 7 (I tried with other versions and presented the same behavior). My connection code is as follows::
public class Conexao {
public Conexao() {}
public Connection conectar() {
final String USUARIO = "***";
final String SENHA = "***";
final String URL = "jdbc:sqlserver://server:1433;databaseName=dbName";
Connection con = null;
try {
Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
con = DriverManager.getConnection(URL, USUARIO, SENHA);
System.out.println(con.toString());
} catch (ClassNotFoundException e) {
System.out.println("Erro ao encontrar o driver");
e.printStackTrace();
} catch (SQLException e) {
System.out.println("Erro ao conectar com o banco");
e.printStackTrace();
}
return con;
}
public Boolean fecharConexao(Connection con) throws SQLException {
try {
con.close();
} catch (SQLException e) {
System.out.println("Erro ao fechar a conexão");
e.printStackTrace();
}
return con.isClosed();
}
}
I have the .jar imported in my build path:
I have a test class that runs and returns the connection successfully, just like it closes.
class ConexaoTest {
@Test
void testConectar() throws SQLException {
Conexao conexao = new Conexao();
Connection con = conexao.conectar();
assertEquals(false, con.isClosed());
}
@Test
void testFecharConexao() throws SQLException {
Conexao conexao = new Conexao();
Connection con = conexao.conectar();
assertEquals(true, conexao.fecharConexao(con));
assertEquals(true, con.isClosed());
}
}
However, in my code when running inside other packages during API calls, I always receive the connection as null, because the driver was not found.
Erro ao encontrar o driver
java.lang.ClassNotFoundException: com.microsoft.sqlserver.jdbc.SQLServerDriver
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1702)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1547)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Unknown Source)
at br.gov.rn.natal.semut.util.Conexao.conectar(Conexao.java:17)
at br.gov.rn.natal.semut.dao.DaoGenerico.execProcedure(DaoGenerico.java:17)
at br.gov.rn.natal.semut.service.ServicoGenericoImpl.execProcedureSimples(ServicoGenericoImpl.java:41)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.jboss.resteasy.core.MethodInjectorImpl.invoke(MethodInjectorImpl.java:140)
at org.jboss.resteasy.core.ResourceMethodInvoker.invokeOnTarget(ResourceMethodInvoker.java:295)
at org.jboss.resteasy.core.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:249)
at org.jboss.resteasy.core.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:236)
at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:402)
at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:209)
at org.jboss.resteasy.plugins.server.servlet.ServletContainerDispatcher.service(ServletContainerDispatcher.java:221)
at org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:56)
at org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:51)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1041)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:603)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:310)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
dez 11, 2017 10:53:47 AM org.apache.catalina.core.StandardWrapperValve invoke
Does anyone have any idea what that problem might be?
You have placed your driver in the directory "WEB-INF/lib"?
– Diego
No. Should I put it in this folder and update the reference in the build path? I’ll try
– Hamurabi Araujo
I put it in the folder and ran it without success. I set up the build path for the path in the folder and the error continues.
– Hamurabi Araujo