springboot使用hadoop（hive）

第一次使用hadoop，记录下工具类，也供大家参考一下。

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Component;

import java.sql.CallableStatement;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.ArrayList;
import java.util.Date;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

/**
 * Hive的JavaApi
 */
@Component
public class HiveJdbcUtil {
    private static final Logger log = LoggerFactory.getLogger(HiveJdbcUtil.class);

    private static String DRIVERNAME = org.apache.hive.jdbc.HiveDriver.class.getName();
    private static String URL;
    private static String USER;
    private static String PASSWORD;
    private static ResultSet RES;


    @Value("${hive-url}")
    private void setURL(String url) {
        HiveJdbcUtil.URL = url;
    }

    @Value("${hive-user}")
    private void setUSER(String user) {
        HiveJdbcUtil.USER = user;
    }

    @Value("${hive-password}")
    private void setPASSWORD(String password) {
        HiveJdbcUtil.PASSWORD = password;
    }

    //call操作，执行脚本
    public static boolean call(String sql) throws Exception {
        Connection conn = null;
        CallableStatement stmt = null;
        try {
            conn = getConn();
            stmt = conn.prepareCall(sql);
            return stmt.execute();
        } finally {
            try {
                if (conn != null) {
                    conn.close();
                }
                if (stmt != null) {
                    stmt.close();
                }
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }

    }

    public static void update(String sql) throws Exception {
        Connection conn = null;
        Statement stmt = null;
        try {
            conn = getConn();
            stmt = conn.createStatement();
            log.info("update data,sql:{}", sql);
            int i = stmt.executeUpdate(sql);
            log.info("update data,result:{}", i);
        } finally {
            try {
                if (conn != null) {
                    conn.close();
                }
                if (stmt != null) {
                    stmt.close();
                }
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
    }

    //插入
    public static void insertData(String sql) throws Exception {
        Connection conn = null;
        Statement stmt = null;
        try {
            conn = getConn();
            stmt = conn.createStatement();
            log.info("insert data,sql:{}", sql);
            int i = stmt.executeUpdate(sql);
            log.info("insert data,result:{}", i);
        } finally {
            try {
                if (conn != null) {
                    conn.close();
                }
                if (stmt != null) {
                    stmt.close();
                }
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }

    }
    //查询结果数量
    public static Long countData(String sql) throws Exception {
        Connection conn = null;
        Statement stmt = null;
        try {
            conn = getConn();
            stmt = conn.createStatement();
            log.info("Running:" + sql);
            RES = stmt.executeQuery(sql);
            if (RES.next()) {
                return RES.getLong(1);
            }
        } finally {
            try {
                if (conn != null) {
                    conn.close();
                }
                if (stmt != null) {
                    stmt.close();
                }
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
        return null;
    }

    
    //查询，并封装成需要的类
    public static List selectDetail(String detailSql) throws Exception {
        Connection conn = null;
        Statement stmt = null;
        try {
            conn = getConn();
            stmt = conn.createStatement();
            log.info("select data,sql:{}", detailSql);
            RES = stmt.executeQuery(detailSql);
            List list = new ArrayList();
            ECostDetailDto eDto = null;
            while (RES.next()) {
                eDto = new ECostDetailDto();
                eDto.setId(RES.getString(1));
                eDto.setGroupid(RES.getString(2));
                eDto.setJobid(RES.getString(3));
                eDto.setBillingreference(RES.getString(4));
                eDto.setCompanycode(RES.getString(5));
                eDto.setEccfiscalyear(RES.getString(6));
                eDto.setEccdocumentnumber(RES.getString(7));
                eDto.setEccpostingdate(RES.getDate(8));
                eDto.setEccdocumentitemno(RES.getString(9));
                eDto.setProfitcenteramount(RES.getDouble(10));
                eDto.setProfitcentercurrency(RES.getString(11));
                eDto.setCompanyamount(RES.getDouble(12));
                eDto.setCompanycurrency(RES.getString(13));
                eDto.setTransactionamount(RES.getDouble(14));
                eDto.setTransactioncurrency(RES.getString(15));
                eDto.setItemid(RES.getString(16));
                list.add(eDto);
            }
            return list;
        } finally {
            try {
                if (conn != null) {
                    conn.close();
                }
                if (stmt != null) {
                    stmt.close();
                }
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
    }


    public static Connection getConn() throws ClassNotFoundException,
        SQLException {
        Class.forName(DRIVERNAME);
        Connection conn = DriverManager.getConnection(URL, USER, PASSWORD);
        return conn;
    }


}

注意点：ResultSet中取值是从1开始的，不是0.

sql使用的mysql查询语言，记录两条：

CALL rdl_cecc_bsis_detail_active()  //call脚本
SELECT * FROM rdl_cecc_bsis_detail  //查询，不要库名，直接查表

配置文件中添加：

hive-url=${HIVE-URL:jdbc:hive2\://111.111.111.111:10000/dataBaseName}
hive-driver-class-name=org.apache.hive.jdbc.HiveDriver
hive-user=${HIVE-USER}
hive-password=${HIVE-PASSWORD}

另外，手动导入inceptor-driver-5.2.2.jar，这个jar包可以在网上搜到，也可以下载我上传的资源。暂时没有找到依赖配置