CDH5.11环境下用java的API操作hive

创建一个maven项目，pom.xml文件配置如下

eccom
hive
1.0-SNAPSHOT


    


    
        org.apache.hive
        hive-jdbc
        1.1.0
    

    
        junit
        junit
        4.9
    
    
    
        org.apache.hadoop
        hadoop-core
        1.1.0
    


 
    HiveJdbcClient
    
        
        
            org.apache.maven.plugins
            maven-compiler-plugin
            
                1.8
                1.8
                UTF-8
            
        
        
        
            net.alchim31.maven
            scala-maven-plugin
            3.2.2
            
                
                    
                        compile
                        testCompile
                    
                    
                        
                            
                            -dependencyfile
                            ${project.build.directory}/.scala_dependencies
                        
                    
                
            
        
        
        
            org.apache.maven.plugins
            maven-shade-plugin
            2.4.3
            
                
                    package
                    
                        shade
                    
                    
                        
                            
                                *:*
                                
                                    META-INF/*.SF
                                    META-INF/*.DSA
                                    META-INF/*.RSA
                                
                            
                        
                        
                            
                                reference.conf
                            
                            
                                HIVE.HiveJdbcClient 
                            
                        
                    
                
            
        
    

创建测试类HiveJDBC，代码如下

package HIVE;

import java.sql.*;

public class HiveJdbcClient {
    private static String driverName = "org.apache.hive.jdbc.HiveDriver";

    /**
     * @param args
     * @throws SQLException
     */
    public static void main(String[] args) throws SQLException {
        try {
            Class.forName(driverName);
        } catch (ClassNotFoundException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
            System.exit(1);
        }
        //replace "hive" here with the name of the user the queries should run as
        Connection con = DriverManager.getConnection("jdbc:hive2://master:10000/neteagle", "master", "");
        Statement stmt = con.createStatement();
        String tableName = "testHiveDriverTable";
        stmt.execute("drop table if exists " + tableName);
        stmt.execute("create table " + tableName + " (key int, value string)");
        // show tables
        String sql = "show tables '" + tableName + "'";
        System.out.println("Running: " + sql);
        ResultSet res = stmt.executeQuery(sql);
        if (res.next()) {
            System.out.println(res.getString(1));
        }
        // describe table
        sql = "describe " + tableName;
        System.out.println("Running: " + sql);
        res = stmt.executeQuery(sql);
        while (res.next()) {
            System.out.println(res.getString(1) + "\t" + res.getString(2));
        }

        // load data into table
        // NOTE: filepath has to be local to the hive server
        // NOTE: /tmp/a.txt is a ctrl-A separated file with two fields per line
        String filepath = "/tmp/a.txt";
        sql = "load data local inpath '" + filepath + "' into table " + tableName;
        System.out.println("Running: " + sql);
        stmt.execute(sql);

        // select * query
        sql = "select * from " + tableName;
        System.out.println("Running: " + sql);
        res = stmt.executeQuery(sql);
        while (res.next()) {
            System.out.println(String.valueOf(res.getInt(1)) + "\t" + res.getString(2));
        }

        // regular hive query
        sql = "select count(1) from " + tableName;
        System.out.println("Running: " + sql);
        res = stmt.executeQuery(sql);
        while (res.next()) {
            System.out.println(res.getString(1));
        }
    }
}

打jar包运行代码

选择package，点击运行（绿色的三角形）

运行完毕后会在target目录下生成我们需要的jar包文件。

复制到集群运行jar包

java -jar HiveJdbcClient.jar

异常分析
这里显示没有找到hadoop的配置，需要添加jar包

    
        org.apache.hadoop
        hadoop-core
        1.1.0
    

再次运行结果正常。

参考网站：

https://www.bbsmax.com/A/VGzl2QnN5b/
https://blog.csdn.net/hg_harvey/article/details/77688703
https://cwiki.apache.org/confluence/display/Hive/HiveServer2+Clients