Phoenix的jdbc封裝

1、Phoenix版本

<dependency>
    <groupId>org.apache.phoenix</groupId>
    <artifactId>phoenix-core</artifactId>
    <version>4.8.0-HBase-1.2</version>
</dependency>

2、鏈接Phoenix和基本CRUD封裝

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

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

/**
 * 功能介紹：使用jdbc對數據庫操做：查詢、更新（插入/修改/刪除）、批量更新
 */
public class DButil {

    private final Logger LOGGER = LoggerFactory.getLogger(getClass());

    /**jdbc的連接*/
    private Connection conn = null;

    /**準備sql*/
    private PreparedStatement ps = null;

    {
        initConnection();
    }

    /**
     * @param sql
     * @param params 參數
     * 功能介紹：更新操做（修改，刪除，插入）
     */
    public int executeUpdate(String sql, Object[] params) {
        if(null == conn){
            initConnection();
        }
        try {
            ps = conn.prepareStatement(sql);
            if (params.length != 0) {
                for (int i = 0; i < params.length; i++) {
                    ps.setObject(i + 1, params[i]);
                }
            }
            int rows = ps.executeUpdate();
            conn.commit();
            return rows;
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            closeUpdate();
        }
        return 0;
    }

    /**
     * @param sql
     * @param list
     * 功能介紹：批量更新
     */
    public void batchUpdate(String sql, List<Object[]> list) {

        if(null == conn){
            initConnection();
        }
        try {
            ps = conn.prepareStatement(sql);
            //關閉自動提交事務
            conn.setAutoCommit(false);
            //防止內存溢出
            final int batchSize = 1000;
            //記錄插入數量
            int count = 0;
            int size = list.size();
            Object[] obj = null;
            for (int i = 0; i < size; i++) {
                obj = list.get(i);
                for (int j = 0; j < obj.length; j++) {
                    ps.setObject(j + 1, obj[j]);
                }
                ps.addBatch();
                if (++count % batchSize == 0) {
                    ps.executeBatch();
                    conn.commit();
                }
            }
            ps.executeBatch();
            conn.commit();
            conn.setAutoCommit(true);
        } catch (SQLException e) {
            e.printStackTrace();
            try {
                conn.rollback();
                conn.setAutoCommit(true);
            } catch (SQLException e1) {
                e1.printStackTrace();
            }
        } finally {
            //關閉資源
            closeUpdate();
        }
    }

    /**
     * @param sql
     * @param params
     * 功能介紹：查詢操做
     */
    public List<Map<String, Object>> executeQuery(String sql, Object[] params) {
        if(null == conn){
            initConnection();
        }
        ResultSet rs = null;
        List<Map<String, Object>> list = null;
        try {
            ps = conn.prepareStatement(sql);
            if (params != null) {
                for (int i = 0; i < params.length; i++) {
                    ps.setObject(i + 1, params[i]);
                }
            }

            long startTime = System.currentTimeMillis();
            rs = ps.executeQuery();
            LOGGER.info("UserBigTableService sql-executeQuery-time: " + (System.currentTimeMillis() - startTime) + "ms");

            list = new ArrayList<>();
            //移動光標，若是新的當前行有效，則返回 true；若是不存在下一行，則返回 false
            while (rs.next()) {
                ResultSetMetaData rsmd = rs.getMetaData();
                Map<String, Object> map = new HashMap<>(16);
                for (int i = 1; i <= rsmd.getColumnCount(); i++) {
                    map.put(rsmd.getColumnName(i), rs.getObject(i));
                }
                list.add(map);
            }
            return list;

        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            closeQuery(rs);
        }
        return null;
    }

    /**
     * @param sql
     * @param params
     * 功能介紹：查詢操做一條記錄
     */
    public Map<String, Object> query (String sql, Object[] params) {
        if(null == conn){
            initConnection();
        }
        ResultSet rs = null;
        Map<String, Object> map = null;
        try {
            ps = conn.prepareStatement(sql);
            if (params != null) {
                for (int i = 0; i < params.length; i++) {
                    ps.setObject(i + 1, params[i]);
                }
            }
            rs = ps.executeQuery();
            //移動光標，若是新的當前行有效，則返回 true；若是不存在下一行，則返回 false
            while (rs.next()) {
                ResultSetMetaData rsmd = rs.getMetaData();
                map = new HashMap<>(16);
                for (int i = 1; i <= rsmd.getColumnCount(); i++) {
                    map.put(rsmd.getColumnName(i), rs.getObject(i));
                }
                //如有多條記錄，取第一條。
                break;
            }
            return map;

        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            closeQuery(rs);
        }
        return null;
    }

    /**
     * 初始化鏈接
     */
    private void initConnection() {
        try {
            //local
           conn = DriverManager.getConnection("jdbc:phoenix:192.168.1.220");
            
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    /**
     * 功能介紹：關閉更新資源
     */
    private void closeUpdate() {
        try {
            if (ps != null) {
                ps.close();
            }

            if (conn != null) {
                conn.close();
            }
        } catch (SQLException e) {
            e.printStackTrace();
        }
    }

    /**
     * @param rs 功能介紹：關閉查詢資源
     */
    private void closeQuery(ResultSet rs) {
        try {
            if (rs != null) {
                rs.close();
            }

            if (ps != null) {
                ps.close();
            }

            if (conn != null) {
                conn.close();
            }
        } catch (SQLException e) {
            e.printStackTrace();
        }
    }

}