hive 使用 jndi 数据源时已经在 Tomcat 中配置好 但是在 java 代码中获取数据源就会报错

Posted 2022-07-28 格格巫 MMQ!!

这个是异常信息

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(NamingManager.java:662)
at javax.naming.InitialContext.getDefaultInitCtx(InitialContext.java:307)
at javax.naming.InitialContext.getURLOrDefaultInitCtx(InitialContext.java:344)
at javax.naming.InitialContext.lookup(InitialContext.java:411)
at sunline.hive.utils.HiveJNDI.getConnection(HiveJNDI.java:29)
at sunline.hive.utils.HiveJNDI.main(HiveJNDI.java:37)

这个是 java 代码（我想在 java 代码中获取数据源）

import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.Properties;

import javax.naming.Context;
import javax.naming.InitialContext;
import javax.sql.DataSource;

public class HiveJNDI
public static Connection getConnection()throws Exception

    /*Properties properties=new Properties();
    properties.setProperty("java.naming.factroy.initial","org.jnp.interfaces.NamingContextFactory");
    properties.setProperty("java.naming.provider.url", "localhost:8080");*/
    InitialContext context = new InitialContext();
    DataSource envCtx = (DataSource) context.lookup("java:comp/env/hive/datasource");
  
        
    
    return envCtx.getConnection();

public static void main(String[] args) 
    try 
        Statement state = getConnection().createStatement();
        String sql="select*from tmp_ods_web_vhlclm_ic";
        ResultSet query = state.executeQuery(sql);
        while(query.next())
            System.out.println(query.getString(1));
        
     catch (SQLException e) 
        
        e.printStackTrace();
     catch (Exception e) 
        
        e.printStackTrace();
    

这个是 tomcat 配置文件代码（这里因为我需要连接 mysql 数据源，与 hive 数据源，两个同时配置是否会有影响？name 不同即可吗？）