上传代码
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zhangdongxu
291
src/main/java/com/nis/util/HiveJDBC.java
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291
src/main/java/com/nis/util/HiveJDBC.java
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package com.nis.util;
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import java.beans.BeanInfo;
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import java.beans.Introspector;
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import java.beans.PropertyDescriptor;
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import java.io.IOException;
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import java.math.BigDecimal;
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import java.sql.Connection;
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import java.sql.DriverManager;
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import java.sql.ResultSet;
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import java.sql.ResultSetMetaData;
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import java.sql.SQLException;
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import java.sql.Statement;
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import java.util.ArrayList;
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import java.util.Date;
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import java.util.HashMap;
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import java.util.List;
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import java.util.Map;
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import java.util.Properties;
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import org.apache.ibatis.mapping.ResultMap;
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import org.apache.ibatis.mapping.ResultMapping;
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import org.apache.ibatis.session.SqlSessionFactory;
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import org.apache.log4j.Logger;
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import com.nis.domain.Page;
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import com.nis.util.redis.SaveRedisListThread;
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import com.nis.web.service.SpringContextHolder;
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public class HiveJDBC {
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private final static Logger logger = Logger.getLogger(HiveJDBC.class);
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static Connection conn = null;
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static ResultSet rs = null;
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static Statement st = null;
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static Properties prop = new Properties();
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static String driverName = "";
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static String url = "";
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static String username = "";
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static String password = "";
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static {
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try {
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prop.load(Configurations.class.getResourceAsStream("/jdbc.properties"));
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} catch (IOException e) {
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e.printStackTrace();
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}
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}
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public static void getConn(String searchActiveSys) throws Exception {
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if (null != searchActiveSys && searchActiveSys.equals("4")) {
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driverName = prop.getProperty("jdbc.hiveA.driver").trim();
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url = prop.getProperty("jdbc.hiveA.url").trim();
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username = prop.getProperty("jdbc.hiveA.username").trim();
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password = prop.getProperty("jdbc.hiveA.password").trim();
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} else {
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driverName = prop.getProperty("jdbc.hiveB.driver").trim();
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url = prop.getProperty("jdbc.hiveB.url").trim();
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username = prop.getProperty("jdbc.hiveB.username").trim();
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password = prop.getProperty("jdbc.hiveB.password").trim();
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}
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Class.forName(driverName);
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conn = DriverManager.getConnection(url, username, password);
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}
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public static ResultSet query(String sql, String searchActiveSys) throws Exception {
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logger.info("开始连接数据中心日志库--------------------------");
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getConn(searchActiveSys);
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logger.info("连接数据中心日志库成功--------------------------");
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st = conn.createStatement();
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if (null != searchActiveSys && searchActiveSys.equals("4")) {
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st.execute("use xa_dfbhit_hive");
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} else {
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st.execute("use xa_z2_mesalog_hive");
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}
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rs = st.executeQuery(sql);
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return rs;
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}
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public static void closeConn() {
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try {
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if (rs != null) {
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rs.close();
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rs = null;
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}
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if (st != null) {
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st.close();
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st = null;
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}
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if (conn != null) {
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conn.close();
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conn = null;
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}
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logger.info("关闭数据中心连接成功");
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} catch (Exception e) {
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e.printStackTrace();
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logger.error("关闭数据中心连接失败,失败原因" + e);
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}
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}
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public static void main(String[] args) throws SQLException {
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try {
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// System.out.println(sdf.parse("2016-09-10 10:20:22").getTime());
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// ResultSet rs = query("");
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Map map = new HashMap();
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map.put("time", new Date());
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map.put("index", 1);
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for (Object key : map.keySet()) {
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Object obj = map.get(key);
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System.out.println(obj);
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}
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} catch (Exception e) {
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e.printStackTrace();
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}
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}
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/**
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* 将结果利用反射映射成对象集合
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*
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* @param rs
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* resultSet
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* @param entityClass
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* 实体类
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* @param obj
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* 那些字段需要转换为date类型(由于数据中心表结构中没有date类型数据,其日期用long型表示,界面中需要显示yyyy-MM-dd
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* hh:mm:ss形式,所以需要将long转换为date)
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* @return
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* @throws Exception
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*/
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public static Map<String, List> tableMapping(Page page, String redisKey, ResultSet rs, Class entityClass,
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Object... obj) throws Exception {
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Map<String, List> mapList = new HashMap<String, List>();
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Map<String, String> filedAndColumnMap = getColumn2FiledMap(entityClass);
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List<String> listString = new ArrayList<String>();
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List listObject = new ArrayList();
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List<String> columnList = null;
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if (null != obj && obj.length > 0) {
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columnList = new ArrayList<String>();
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for (int i = 0; i < obj.length; i++) {
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columnList.add(obj[i].toString().toLowerCase());
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}
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}
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// ResultSet rs = HiveJDBC.query(sql.toString());
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ResultSetMetaData metaData = rs.getMetaData();
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while (rs.next()) {
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Map map = new HashMap();
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for (int i = 1; i <= metaData.getColumnCount(); i++) {
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Object value = rs.getObject(i);
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String filedName = filedAndColumnMap.get(metaData.getColumnName(i).toString().toLowerCase());
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if (null != value) {
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if (null != columnList && columnList.contains(filedName.toLowerCase())) {
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long time = 0l;
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if (null != value && !value.toString().equals("")) {
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time = Long.parseLong(value.toString());
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}
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map.put(filedName, new Date(time * 1000));
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// map.put(filedName, new
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// Date(Long.parseLong("1476583810000")));
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} else {
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map.put(filedName, value);
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}
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} else {
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map.put(filedName, null);
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}
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}
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listString.add(JsonMapper.toJsonString(map2Obj(map, entityClass)));
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listObject.add(map2Obj(map, entityClass));
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}
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logger.info("开始关闭数据中心连接");
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HiveJDBC.closeConn();
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if (null == listString || listString.size() == 0 || null == listObject || listObject.size() == 0) {
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return null;
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} else {
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if (Constants.IS_OPEN_REDIS && Constants.DATACENTER_OPEN_REDIS) {
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new SaveRedisListThread(redisKey, listString, Constants.HIVE_EXPIRE).start();
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}
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}
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// sublist包前不包后,0-30实际获取的是0-29的数据
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Integer startNum = (page.getPageNo() - 1) * page.getPageSize();
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Integer endNum = startNum - 1 + page.getPageSize() + 1;
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if (listString.size() >= startNum) {
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if (listString.size() >= endNum) {
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mapList.put("str", listString.subList(startNum, endNum));
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} else {
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mapList.put("str", listString.subList(startNum, listString.size()));
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}
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} else {
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mapList.put("str", new ArrayList());
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}
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if (listObject.size() >= startNum) {
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if (listObject.size() >= endNum) {
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mapList.put("obj", listObject.subList(startNum, endNum));
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} else {
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mapList.put("obj", listObject.subList(startNum, listObject.size()));
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}
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} else {
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mapList.put("obj", new ArrayList());
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}
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return mapList;
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}
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public static Object map2Obj(Map map, Class type) throws Exception {
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BeanInfo beanInfo = Introspector.getBeanInfo(type);
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Object obj = type.newInstance();
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PropertyDescriptor[] propertyDescriptors = beanInfo.getPropertyDescriptors();
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for (int i = 0; i < propertyDescriptors.length; i++) {
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PropertyDescriptor propertyDescriptor = propertyDescriptors[i];
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String name = propertyDescriptor.getName();
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String fieldTypeName = propertyDescriptor.getPropertyType().getName();
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if (map.containsKey(name)) {
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Object value = map.get(name);
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if (null != value && !value.equals("")) {
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if (fieldTypeName.equals("java.lang.String")) {
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propertyDescriptor.getWriteMethod().invoke(obj, new String[] { value.toString() });
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} else if (fieldTypeName.equals("java.lang.Integer")) {
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propertyDescriptor.getWriteMethod().invoke(obj,
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new Integer[] { Integer.parseInt(value.toString()) });
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// propertyDescriptor.getWriteMethod().invoke(obj, new
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// Integer[] { 0 });
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} else if (fieldTypeName.equals("java.lang.Long")) {
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propertyDescriptor.getWriteMethod().invoke(obj,
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new Long[] { Long.parseLong(value.toString()) });
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// propertyDescriptor.getWriteMethod().invoke(obj, new
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// Long[] { 0l });
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} else if (fieldTypeName.equals("java.lang.Boolean")) {
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propertyDescriptor.getWriteMethod().invoke(obj,
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new Boolean[] { Boolean.parseBoolean(value.toString()) });
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} else if (fieldTypeName.equals("java.lang.Character")) {
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propertyDescriptor.getWriteMethod().invoke(obj, value.toString().toCharArray());
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} else if (fieldTypeName.equals("java.lang.Byte")) {
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propertyDescriptor.getWriteMethod().invoke(obj, value.toString().getBytes());
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} else if (fieldTypeName.equals("java.lang.Short")) {
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propertyDescriptor.getWriteMethod().invoke(obj,
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new Short[] { Short.parseShort(value.toString()) });
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} else if (fieldTypeName.equals("java.lang.Float")) {
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propertyDescriptor.getWriteMethod().invoke(obj,
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new Float[] { Float.parseFloat(value.toString()) });
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} else if (fieldTypeName.equals("java.lang.Double")) {
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propertyDescriptor.getWriteMethod().invoke(obj,
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new Double[] { Double.parseDouble(value.toString()) });
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} else if (fieldTypeName.equals("java.math.BigDecimal")) {
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propertyDescriptor.getWriteMethod().invoke(obj,
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new BigDecimal[] { BigDecimal.valueOf(Long.parseLong(value.toString())) });
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// propertyDescriptor.getWriteMethod().invoke(obj, new
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// BigDecimal[] { new BigDecimal(0) });
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} else if (fieldTypeName.equals("java.util.Date")) {
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propertyDescriptor.getWriteMethod().invoke(obj, new Date[] { (Date) value });
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}
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}
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}
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}
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return obj;
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}
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public static Map<String, String> getColumn2FiledMap(Class clazz) {
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Map<String, String> map = new HashMap<String, String>();
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SqlSessionFactory sqlSessionFactory = SpringContextHolder.getBean(SqlSessionFactory.class);
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ResultMap resultMap = sqlSessionFactory.getConfiguration().getResultMap(clazz.getSimpleName() + "Map");
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List<ResultMapping> mapping = resultMap.getResultMappings();
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for (ResultMapping mapp : mapping) {
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map.put(mapp.getColumn().toLowerCase(), mapp.getProperty());
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}
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return map;
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}
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public static void close() {
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try {
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if (rs != null) {
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rs.close();
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rs = null;
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}
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if (st != null) {
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st.close();
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st = null;
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}
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if (conn != null) {
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conn.close();
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conn = null;
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}
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} catch (SQLException e) {
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e.printStackTrace();
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}
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}
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}
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