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java - NoInitialContextException 错误 Tomcat

转载 作者:塔克拉玛干 更新时间:2023-11-03 05:13:06 25 4
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我一直试图在这里找到解决方案,但我不能...我有以下代码,但出现此错误。

我错过了什么吗?谢谢:)

代码

package src;
import java.sql.DriverManager;
import java.sql.Connection;
import java.sql.SQLException;
import java.sql.Statement;
import java.sql.Wrapper;
import java.util.Hashtable;
import java.util.Properties;
import java.io.*;
import javax.*;
import javax.activation.DataSource;
import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.NamingException;
import oracle.jdbc.pool.OracleDataSource;

public class TestServlet {

@SuppressWarnings("unused")
public static void main(String[] argv) throws SQLException, NamingException {

Context initialContext = new InitialContext();
if ( initialContext == null){System.out.println("initialContext null");}
else {System.out.println("initialContext");}

// Get DataSource
Context environmentContext = (Context)initialContext.lookup("java:/comp/env");
if ( environmentContext == null){System.out.println("envContext null.");}
else {System.out.println("envContext");}

DataSource ds = (DataSource)environmentContext.lookup("jdbc/testdb");



System.out.println("\n -------- Oracle JDBC Connection Testing ------");

try {

Connection jdbcConnection = ((Statement) ds).getConnection();
OracleDataSource ods = ((Wrapper) ds).unwrap(OracleDataSource.class);
jdbcConnection.close();

} catch (SQLException e) {

System.out.println("Connection Failed! Check output console");
e.printStackTrace();
return;

}

String message = "You are connected!";
System.out.println(message);

}

}

context.xml

<Context>
<Resource name="jdbc/testdb"
auth="Container"
type="javax.sql.DataSource"
maxActive="100"
maxIdle="30"
maxWait="10000"
username="dba01"
password="qvE-g7Cacontext.xml"
driverClassName="com.mysql.jdbc.Driver"
url="jdbc:oracle:thin:@10.0.1.6:1521:xe"/>
</Context>

错误

Exception in thread "main" javax.naming.NoInitialContextException: Need to specify class name in environment or system property, or as an applet parameter, or in an application resource file:  java.naming.factory.initial
at javax.naming.spi.NamingManager.getInitialContext(Unknown Source)
at javax.naming.InitialContext.getDefaultInitCtx(Unknown Source)
at javax.naming.InitialContext.getURLOrDefaultInitCtx(Unknown Source)
at javax.naming.InitialContext.lookup(Unknown Source)
at src.TestServlet.main(TestServlet.java:34)

如果您需要更多信息,请告诉我!

最佳答案

您需要一个初始上下文工厂。对于 Tomcat,它是 org.apache.naming.java.javaURLContextFactory:

        System.setProperty(Context.INITIAL_CONTEXT_FACTORY,
"org.apache.naming.java.javaURLContextFactory");

关于java - NoInitialContextException 错误 Tomcat,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/28995272/

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