技術標籤：java大資料javahive

java jdbc查詢hive資料，並將結果存為列表顯示
1.程式碼

import java.sql.*;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

public class HiveConnect {
    public static void main(String [] args) throws Exception{
        Class.forName("org.apache.hive.jdbc.HiveDriver"
 
);
        //root為使用者名稱，後面為密碼，""表示無密碼
        Connection connection = DriverManager.getConnection("jdbc:hive2://39.106.229.57:10000/test", "root", "");
        Statement statement = connection.createStatement();
        String querySQL = "select * from student limit 2"
 
;
        ResultSet rs = statement.executeQuery(querySQL);
        List<Map<String, Object>> list = new ArrayList<>();
        try {
            ResultSetMetaData md = rs.getMetaData();
            int columnCount = md.getColumnCount();
            while (rs.next()) {
                Map<
 
String, Object> rowData = new HashMap<>();
                for (int i = 1; i <= columnCount; i++) {
                    rowData.put(md.getColumnName(i), rs.getObject(i));
                }
                list.add(rowData);
            }
            System.out.println(list);
        }catch (SQLException e) {
            e.printStackTrace();
        } finally {
            try {
                if (rs != null)
                    rs.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
    }
}

2.執行結果