配置jndi服務，javax.naming.NamingException的四種情況

1.當jndi服務沒有啟動，或者jndi服務的屬性沒有設置正確，拋出如下異常： javax.naming.CommunicationException: Can't find SerialContextProvider...
2.如果InitialContext class既沒有為jndi服務提供者指出默認屬性也沒有明確指明屬性，拋出如下異常： javax.naming.NoInitialContextException:Need to specify class name in enenvironment or system property,or as an appletparameter, or in an application resource file: java.naming java.naming.factory.initial
3.如果jndi程序的classpath沒有包括jndi server class,拋出如下異常： javax.naming.NoInitialContextException: Cannot instantiate class: XXX [Root exception is java.lang.ClassNotFoundException: XXX]
4.jndi屬性與jndi服務提供者不匹配，拋出如下異常： javax.naming.ServiceUnavailableException: Connection refused: no further information [Root exception is java.net.ConnectionException: Connection refused:no further information]

 

import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.NamingException;
import javax.sql.DataSource;
     Context jndiContext = new InitialContext();
      String jndiName = "java:/" + user.toLowerCase();
      ds = (DataSource)jndiContext.lookup(jndiName);
      con = ds.getConnection();
      Connection localConnection = con;
      return localConnection;