Redis集群版在Java中的应用

 2023-09-05 阅读 613 评论 0

摘要:1、配置redis集群 <?xml version="1.0" encoding="UTF-8"?> <redisCluster> <!--userRoute --> <clusterGroup name="userRoute" selectdb="1"> <server host="10.177.129.16" port&

1、配置redis集群

    <?xml version="1.0" encoding="UTF-8"?>  <redisCluster>  <!--userRoute -->  <clusterGroup name="userRoute" selectdb="1">  <server host="10.177.129.16" port="6379"></server>  <server host="10.177.129.15" port="6379"></server>  </clusterGroup>  <!--sessionRoute -->  <clusterGroup name="sessionRoute" selectdb="2">  <server host="10.177.129.16" port="6379"></server>  <server host="10.177.129.15" port="6379"></server>  </clusterGroup>  <!--publicData -->  <clusterGroup name="publicData">  <server host="10.177.129.16" port="6379"></server>  <server host="10.177.129.15" port="6379"></server>  </clusterGroup>  </redisCluster>  

2、创建redis连接属性实体类

    package net.itxm.cms.syscore.pojo;  /*** redis连接属性**/  public class RedisCluster   {  private String selectdb;  private String hostIp;  private String  port;  public String getSelectdb() {  return selectdb;  }  public void setSelectdb(String selectdb) {  this.selectdb = selectdb;  }  public String getHostIp() {  return hostIp;  }  public void setHostIp(String hostIp) {  this.hostIp = hostIp;  }  public String getPort() {  return port;  }  public void setPort(String port) {  this.port = port;  }  }  

3、解析redis集群配置

    package net.itxm.itreasury.test.jedis;  import java.io.IOException;  import java.util.ArrayList;  import java.util.HashMap;  import java.util.Iterator;  import java.util.List;  import java.util.Map;  import java.util.Set;  import org.dom4j.Document;  import org.dom4j.DocumentException;  import org.dom4j.Element;  import org.dom4j.io.SAXReader;  import org.springframework.core.io.ClassPathResource;   import org.springframework.core.io.Resource;   import org.springframework.core.io.support.EncodedResource;  /*** 解析redis集群配置**/  public class RedisConfig {  public static Map<String,List<RedisCluster>> redisGroupMap = null;  //有参构造函数  public RedisConfig()  {  }  //获取所有clusterGroup组的键值对  public static Map<String,List<RedisCluster>> getRedisGroupMap(){  //读取xml文件  Document document=readXmlFile();  //获得clusterGroup节点的key 和 list  if(redisGroupMap == null)  {  redisGroupMap=getMapByItemsGroup(document);  }  return redisGroupMap;  }  //读取redisConfig配置文件  private static Document readXmlFile(){  //创建读入对象  SAXReader reader = new SAXReader();  //创建document实例  Document doc=null;  try {  //从类路径下加载文件redisConfig.xml    Resource resource = new ClassPathResource("redisClusterConfig.xml");   //指定文件资源对应的编码格式(UTF-8),这样才能正确读取文件的内容,而不会出现乱码  EncodedResource encodeResource = new EncodedResource(resource,"UTF-8");   doc = reader.read(encodeResource.getReader());  }   catch (IOException e) {  System.out.println("无法读取系统配置文件redisConfig.xml,可能该文件不存在");  } catch (DocumentException e) {  System.out.println("解析redisConfig.xml文件出现异常");  }  return doc;  }  //读取xml节点,返回节点为redisGroup的Map  private  static Map<String,List<RedisCluster>> getMapByItemsGroup(Document document){  Map<String,List<RedisCluster>> itemmap=new HashMap<String,List<RedisCluster>>();  try{  //获得根节点  Element root=document.getRootElement();  //获得根节点下所有子节点clusterGroup的list  List itemsList=root.selectNodes("./clusterGroup");  for(int i=0;i<itemsList.size();i++){  //获得节点Items  Element items=(Element)itemsList.get(i);  String groupName=items.attribute("name").getText();  String selectdb = items.attribute("selectdb")==null?"":items.attribute("selectdb").getText();  //      if(groupName!=null&&groupName.equals(this.getGroupName())){  //获得clusterGroup下所有子节点service的list  List itemList=items.elements();  //获得service节点的值  List<RedisCluster> redisClusterList = getItemList(itemList,selectdb);  itemmap.put(groupName, redisClusterList);  //      }  }  }  catch(Exception e){  }  return itemmap;  }  //获得所有Item下节点的redis服务节点  private static List<RedisCluster> getItemList(List itemList,String selectdb){  List<RedisCluster> redisClusterList = new ArrayList<RedisCluster>();  for(int i=0;i<itemList.size();i++){  //获得节点server  Element item=(Element)itemList.get(i);  String hostIp =  item.attribute("host").getText();  String port = item.attribute("port").getText();  RedisCluster redisCluster =new RedisCluster();  redisCluster.setHostIp(hostIp);  redisCluster.setPort(port);  redisCluster.setSelectdb(selectdb);  redisClusterList.add(redisCluster);  }  return redisClusterList;  }  public static void main(String[] args) {  getRedisGroupMap();  //JedisUtil.insertPublicDataObject("user1", "张三", JedisUtil.ONLINE_USER);  //JedisUtil.insertPublicDataObject("user2", "李四", JedisUtil.ONLINE_USER);  //JedisUtil.insertPublicDataObject("user3", "王五", JedisUtil.ONLINE_USER);  Set s = JedisUtil.getAllSet(JedisUtil.ONLINE_USER);  Iterator it = s.iterator();      while (it.hasNext()) {  String key = (String) it.next();  String value = JedisUtil.getString(key,JedisUtil.ONLINE_USER);  System.out.println(key + value);  }  String test = JedisUtil.getString("user1",JedisUtil.ONLINE_USER);  System.out.println(test);  }  }  

4、操作redis数据库的工具类

    package net.itxm.cms.syscore.utils;  import java.lang.reflect.Type;  import java.util.List;  import java.util.Set;  import java.util.zip.CRC32;  import redis.clients.jedis.Jedis;  import redis.clients.jedis.exceptions.JedisConnectionException;  import com.google.gson.Gson;  import com.isoftstone.cms.syscore.pojo.RedisCluster;  public class JedisUtil {  // 数据库  public static final String STORE_LOGINUSER = "4";// 商户登陆用户  public static final String STORE_INFO = "5";// 商户状态 商户购买服务有效期  public static final String CHECK_CODE = "6";// 验证码  public static final String MENU = "7";// 全部菜单  public static final String SERVICE = "8";// 服务收费信息  public static final String STORE_LOGINKEY = "9";// 初始化登录公钥 私钥对  // 固定key  public static final String ALL_MENU_KEY = "ALL_MENU_KEY";  public static final String BUY_SERVICE_KEY = "BUY_SERVICE_KEY";// 服务收费购买key  public static final String ALL_SERVICE_KEY = "ALL_SERVICE_KEY";//所有服务  public static final String MENU_AUTHORITY = "MENU_AUTHORITY";// 菜单权限  public static final String STORE_MENU_KEY = "STORE_MENU_KEY";// 需要商户分配的业务菜单  public static final String STORE_SERVICE_KEY = "STORE_SERVICE_KEY";// 商户收费key  public static final String SYSTE_MENU_KEY = "SYSTE_MENU_KEY";// 系统管理菜单key  // jedis服务组业务类型  public static final String CONT_CLUSTERNAME_PUBLICDATA = "publicData";  public static final String CONT_CLUSTERNAME_SESSIONROUTE = "sessionRoute";  public static final String CONT_CLUSTERNAME_USERROUTE = "userRoute";  // 操作方式 0 插入 1获取 2 删除  public static final long INSERT_OPERATION = 0;  public static final long GET_OPERATION = 1;  public static final long DELETE_OPERATION = 2;  // 验证码过期秒数  public static final int CHECKCODE_EXPIRESECONDS = 5*60;  // session过期秒数  public static final int EXPIRESECONDS = 30 * 60;  private static void closeJedis(Jedis jedis) {  try {  jedis.quit();  } catch (JedisConnectionException e) {  e.printStackTrace();  }  jedis.disconnect();  }  /*** 根据Key获取字符串** @param key* @param jedisGroup*/  public static String getString(String key, String selectdb) {  Jedis jedis = getPublicDataJedis(key, GET_OPERATION, selectdb);  return jedis.get(key);  }  /*** 获取所有数据set* @param selectdb* @return*/  public static Set getAllSet(String selectdb) {  Jedis jedis = getDataJedis(GET_OPERATION, selectdb);  return jedis.keys("*");  }  /*** 默认取配置文件的第一个数据库* @param operation* @param selectdb* @return*/  private static Jedis getDataJedis(long operation, String selectdb) {  if (RedisConfig.redisGroupMap == null) {  RedisConfig.redisGroupMap = RedisConfig.getRedisGroupMap();  }  List<RedisCluster> clustersList = RedisConfig.redisGroupMap.get(CONT_CLUSTERNAME_PUBLICDATA);  int clusterNo = 0;//默认存到第一个  RedisCluster cluster = clustersList.get(clusterNo);  Jedis jedis = new Jedis(cluster.getHostIp(), Integer.valueOf(cluster.getPort()));  jedis.select(Integer.valueOf(selectdb));  return jedis;  }  /*** 删除数据** @param key* @param jedisGroup*/  public static void deleteObject(String key, String jedisGroup) {  Jedis jedis = getJedis(key, jedisGroup, DELETE_OPERATION);  jedis.del(key);  closeJedis(jedis);  }  /*** 删除公共数据** @param key* @param objClass* @param selectdb*/  public static void deletePublicDataObject(String key, String selectdb) {  Jedis jedis = getPublicDataJedis(key, DELETE_OPERATION, selectdb);  jedis.del(key);  closeJedis(jedis);  }  /*** 获取jedis的库实例** @param key* @param jedisGroup* @param operation* @return*/  private static Jedis getJedis(String key, String jedisGroup, long operation) {  if (RedisConfig.redisGroupMap == null) {  RedisConfig.redisGroupMap = RedisConfig.getRedisGroupMap();  }  List<RedisCluster> clustersList = RedisConfig.redisGroupMap.get(jedisGroup);  int arrayLength = clustersList.size();  // 根据key值算出该信息应该存入到那个  int clusterNo = getRedisNo(key, arrayLength);  RedisCluster cluster = clustersList.get(clusterNo);  Jedis jedis = new Jedis(cluster.getHostIp(), Integer.valueOf(cluster.getPort()));  jedis.select(Integer.valueOf(cluster.getSelectdb()));  return jedis;  }  /*** redis key值获取对象** @param key* @param objClass* @param jedisGroup* @return*/  public static Object getObject(String key, Class objClass, String jedisGroup) {  Jedis jedis = getJedis(key, jedisGroup, GET_OPERATION);  String sObj = jedis.get(key);  closeJedis(jedis);  Gson gson = new Gson();  return gson.fromJson(sObj, objClass);  }  /*** 获取公共数据jedis的库实例** @param key* @param jedisGroup* @param operation* @return*/  private static Jedis getPublicDataJedis(String key, long operation, String selectdb) {  if (RedisConfig.redisGroupMap == null) {  RedisConfig.redisGroupMap = RedisConfig.getRedisGroupMap();  }  List<RedisCluster> clustersList = RedisConfig.redisGroupMap.get(CONT_CLUSTERNAME_PUBLICDATA);  int arrayLength = clustersList.size();  // 根据key值算出该信息应该存入到那个  int clusterNo = getRedisNo(key, arrayLength);  RedisCluster cluster = clustersList.get(clusterNo);  Jedis jedis = new Jedis(cluster.getHostIp(), Integer.valueOf(cluster.getPort()));  jedis.select(Integer.valueOf(selectdb));  return jedis;  }  /*** publicdata redis key值获取对象** @param key* @param objClass* @param jedisGroup* @return*/  public static Object getPublicDataObject(String key, Class objClass, String selectdb) {  Jedis jedis = getPublicDataJedis(key, GET_OPERATION, selectdb);  String sObj = jedis.get(key);  closeJedis(jedis);  Gson gson = new Gson();  return gson.fromJson(sObj, objClass);  }  /*** publicdata redis key值获取对象 List<Entity>** @param key* @param objClass* @param jedisGroup* @return*/  public static Object getPublicDataObjectByType(String key, Type type, String selectdb) {  Jedis jedis = getPublicDataJedis(key, GET_OPERATION, selectdb);  String sObj = jedis.get(key);  closeJedis(jedis);  Gson gson = new Gson();  return gson.fromJson(sObj, type);  }  /*** 获取redis服务器库编号** @param hashKey* @return*/  public static int getRedisNo(String key, int arraySize) {  long hashKey = hash(key);  int redisNo = (int) (hashKey % arraySize);  return redisNo;  }  /*** 根据key值算出hash值** @param k* @return*/  public static long hash(String k) {  CRC32 crc32 = new CRC32();  crc32.update(k.getBytes());  return crc32.getValue();  }  /*** redis 根据key值将对象插入到不同的库中** @param key* @param insertObj* @param jedisGroup*/  public static void insertObject(String key, Object insertObj, String jedisGroup) {  Jedis jedis = getJedis(key, jedisGroup, INSERT_OPERATION);  Gson gson = new Gson();  jedis.set(key, gson.toJson(insertObj));  closeJedis(jedis);  }  /*** redis 根据key值将对象插入到不同的库中** @param key* @param insertObj* @param jedisGroup* @param expire*/  public static void insertObject(String key, Object insertObj, String jedisGroup, int expireSeconds) {  Jedis jedis = getJedis(key, jedisGroup, INSERT_OPERATION);  Gson gson = new Gson();  jedis.setex(key, expireSeconds, gson.toJson(insertObj));  closeJedis(jedis);  }  /*** publicdata redis 根据key值将对象插入到不同的库中** @param key* @param insertObj* @param jedisGroup*/  public static void insertPublicDataObject(String key, Object insertObj, String selectdb) {  Jedis jedis = getPublicDataJedis(key, INSERT_OPERATION, selectdb);  Gson gson = new Gson();  jedis.set(key, gson.toJson(insertObj));  closeJedis(jedis);  }  /*** publicdata redis 根据key值将对象插入到不同的库中,** @param key* @param insertObj* @param jedisGroup* @param expireSeconds*/  public static void insertPublicDataObject(String key, Object insertObj, String selectdb, int expireSeconds) {  Jedis jedis = getPublicDataJedis(key, INSERT_OPERATION, selectdb);  Gson gson = new Gson();  jedis.setex(key, expireSeconds, gson.toJson(insertObj));  closeJedis(jedis);  }  /*** 更新redis中key的超时时间** @param key* @param jedisGroup* @param expireSeconds*/  public static void resetExpireSeconds(String key, String jedisGroup, int expireSeconds) {  Jedis jedis = getJedis(key, jedisGroup, GET_OPERATION);  jedis.expire(key, expireSeconds);  closeJedis(jedis);  }  }  

5、所需jar包

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