Redis在线管理篇

Redis在线管理篇

一.引入

    Redis是什么：搜索引擎上面一大推，这里不说了。

    Redis特点：性能极高 – Redis能支持超过 100K+ 每秒的读写频率，同时具备丰富的数据类型 – 支持二进制案例的 Strings, Lists, Hashes, Sets 及 Ordered Sets 数据类型操作......

    因此Redis用作为高速缓存场景非常适合，（如：集群环境下session的存储，新提醒等）。

    然而redis大多数都是通过client进行管理的，对于系统用户来说，不能直接图形化管理redis数据是一个弊端，此篇文章就记录一下开发redis在线管理的要点。

二.操作要点

先上代码吧

1.  配置文件  redis.properties

#============ Redis Configuration Begin ==========#redis_host=127.0.0.1redis_port=6379redis_pwd=123456redis_maxTotal=200redis_maxIdle=50redis_minIdle=10redis_maxWaitMillis=10000#============= Redis Configuration End ===========#

2.  读取配置文件：PropertiesHandler.java

import java.io.InputStream;import java.util.Properties;import org.slf4j.Logger;import org.slf4j.LoggerFactory;/** * 读取属性配置文件 * @author yannguo */public class PropertiesHandler {private static Logger log = LoggerFactory.getLogger(PropertiesHandler.class);private static Properties defaultProperties;static {ClassLoader classLoader = Thread.currentThread().getContextClassLoader();if (classLoader == null) {classLoader = PropertiesHandler.class.getClassLoader();}try {if (log.isDebugEnabled()) {log.debug("开始装载属性资源参数文件...");}InputStream is = classLoader.getResourceAsStream("redis.properties");defaultProperties = new Properties();defaultProperties.load(is);} catch (Exception e) {try {throw new Exception("装载属性资源参数文件出错.", e);} catch (Exception e1) {}}}/** * 返回缺省属性文件[application.properties]属性值 *  * @param pKey * @return String */public static String getProperty(String pKey) {String value = defaultProperties.getProperty(pKey, "");return value;}}

3.  Redis工具类  JedisUtil.java

package com.hfmx.utils.redis;import java.io.ByteArrayOutputStream;import java.io.IOException;import java.io.ObjectOutputStream;import java.util.List;import java.util.Map;import java.util.Set;import com.google.gson.Gson;import com.hfmx.formmodel.redis.FRedisModel;import redis.clients.jedis.Jedis;import redis.clients.jedis.JedisPool;import redis.clients.jedis.JedisPoolConfig;/** * Redis客户端 * @author yangnuo */@SuppressWarnings("deprecation")public class JedisUtil {//private static Logger logger = LoggerFactory.getLogger(JedisUtil.class);// 连接池对象private static JedisPool jedisPool;static {String host = PropertiesHandler.getProperty("redis_host");int port = Integer.valueOf(PropertiesHandler.getProperty("redis_port"));String password = PropertiesHandler.getProperty("redis_pwd");        JedisPoolConfig config = new JedisPoolConfig();        config.setMaxTotal(Integer.valueOf(PropertiesHandler.getProperty("redis_maxTotal")));        config.setMaxIdle(Integer.valueOf(PropertiesHandler.getProperty("redis_maxIdle")));        config.setMinIdle(Integer.valueOf(PropertiesHandler.getProperty("redis_minIdle")));        config.setMaxWaitMillis(Integer.valueOf(PropertiesHandler.getProperty("redis_maxWaitMillis")));        config.setTestOnBorrow(true);        config.setTestOnReturn(true);        //Idle时进行连接扫描        config.setTestWhileIdle(true);        //表示idle object evitor两次扫描之间要sleep的毫秒数        config.setTimeBetweenEvictionRunsMillis(30000);        //表示idle object evitor每次扫描的最多的对象数        config.setNumTestsPerEvictionRun(10);        //表示一个对象至少停留在idle状态的最短时间，然后才能被idle object evitor扫描并驱逐；这一项只有在timeBetweenEvictionRunsMillis大于0时才有意义        config.setMinEvictableIdleTimeMillis(60000);        if (JHCJUtils.isEmpty(password)) {        jedisPool = new JedisPool(config, host, port);}else{jedisPool = new JedisPool(config, host, port, 0, password);}}    /**     * 获取Jedis连接客户端     *      * @return     */public static Jedis getJedisClient() {Jedis jedis = null;try {jedis = jedisPool.getResource();} catch (Exception e) {//logger.error("获取Redis客户端连接失败。");System.out.println("错误:[获取Redis客户端连接失败]");e.printStackTrace();}if (jedis == null) {//logger.warn("没有获取到Redis客户端连接。");System.out.println("警告:[没有获取到Redis客户端连接]");}return jedis;}/** * 安全回收资源 *  * @param jedis */public static void close(Jedis jedis) {try {jedisPool.returnResource(jedis);} catch (Exception e) {if (jedis.isConnected()) {jedis.quit();jedis.disconnect();}}}/** * 设置字符串型数据 *  * @param key *            存储键 * @param value *            存储值 * @param timeout *            超时时间(单位：秒） 设置为0，则无时效性。 * @return */public static void setString(String key, String value, int timeout) {if (JHCJUtils.isEmpty(key)) {throw new NullPointerException("Key不能为空!");}Jedis jedis = null;try {jedis = getJedisClient();jedis.set(key, value);if (timeout > 0) {jedis.expire(key, timeout);}} catch (Exception e) {jedisPool.returnBrokenResource(jedis);//logger.error("操作Redis失败", e);System.out.println("错误:[操作Redis失败]");} finally {close(jedis);}}/** * 设置字符串型数据过期时间 *  * @param key *            存储键 * @param timeout *            超时时间(单位：秒） * @param key */public static void exprString(String key, int timeout) {if (JHCJUtils.isEmpty(key)) {return;}Jedis jedis = null;try {jedis = getJedisClient();jedis.expire(key, timeout);} catch (Exception e) {jedisPool.returnBrokenResource(jedis);//logger.error("操作Redis失败", e);System.out.println("错误:[操作Redis失败]");} finally {close(jedis);}}/** * 设置序列化对象数据 *  * @param key *            存储键 * @param value *            存储值 * @param timeout *            超时时间(单位：秒） 设置为0，则无时效性。 * @return */public static void setObj(String key, byte[] value, int timeout) {if (JHCJUtils.isEmpty(key)) {throw new NullPointerException("Key不能为空!");}Jedis jedis = null;try {jedis = getJedisClient();jedis.set(key.getBytes(), value);if (timeout > 0) {jedis.expire(key, timeout);}} catch (Exception e) {jedisPool.returnBrokenResource(jedis);//logger.error("操作Redis失败", e);System.out.println("错误:[操作Redis失败]");} finally {close(jedis);}}/** * 添加集合数据 * @param type * @param obj * @param existtime */public static void addAggregate(FRedisModel redisModel){Jedis jedis = JedisUtil.getJedisClient();if(redisModel.getType().equals("list")){List list = (List) redisModel.getVal();for (int i=0;i<list.size();i++) {jedis.lpush(redisModel.getKey(), new Gson().toJson(list.get(i)));}}else if(redisModel.getType().equals("set")){Set set =  (Set) redisModel.getVal();for (Object object : set) {jedis.sadd(redisModel.getKey(), new Gson().toJson(object));}}else if(redisModel.getType().equals("hashObj")){jedis.hmset(redisModel.getKey().getBytes(),(Map<byte[], byte[]>) redisModel.getVal());}else if(redisModel.getType().equals("hashStr")){jedis.hmset(redisModel.getKey(), (Map<String, String>) redisModel.getVal());}if (redisModel.getExisttime() > 0) {jedis.expire(redisModel.getKey(), (int)redisModel.getExisttime());}JedisUtil.close(jedis);System.out.println("完成添加   ["+redisModel.getType()+"]  集合");}/** * 获取字符串型数据 *  * @param key * @return */public static String getString(String key) {if (JHCJUtils.isEmpty(key)) {throw new NullPointerException("Key不能为空!");}String value = null;Jedis jedis = null;try {jedis = getJedisClient();value = jedis.get(key);} catch (Exception e) {jedisPool.returnBrokenResource(jedis);//logger.error("操作Redis失败", e);System.out.println("错误:[操作Redis失败]");} finally {close(jedis);}return value;}/** * 获取序列化对象数据 *  * @param key * @return */public static byte[] getObj(String key) {if (JHCJUtils.isEmpty(key)) {throw new NullPointerException("Key不能为空!");}byte[] value = null;Jedis jedis = null;try {jedis = getJedisClient();value = jedis.get(key.getBytes());} catch (Exception e) {jedisPool.returnBrokenResource(jedis);//logger.error("操作Redis失败", e);System.out.println("错误:[操作Redis失败]");} finally {close(jedis);}return value;}/** * 删除对象数据 *  * @param key */public static void delObj(String key) {if (JHCJUtils.isEmpty(key)) {return;}Jedis jedis = null;try {jedis = getJedisClient();jedis.del(key.getBytes());} catch (Exception e) {jedisPool.returnBrokenResource(jedis);//logger.error("操作Redis失败", e);System.out.println("错误:[操作Redis失败]");} finally {close(jedis);}}/** * 删除字符串数据 *  * @param key */public static void delString(String key) {if (JHCJUtils.isEmpty(key)) {return;}Jedis jedis = null;try {jedis = getJedisClient();jedis.del(key);} catch (Exception e) {jedisPool.returnBrokenResource(jedis);//logger.error("操作Redis失败", e);System.out.println("错误:[操作Redis失败]");} finally {close(jedis);}}/** * 清除DB *  * @param key */public static void flushDB() {Jedis jedis = null;try {jedis = getJedisClient();jedis.flushDB();//logger.info("Redsi缓存DB重置成功。");System.out.println("输出:[Redsi缓存DB重置成功]");} catch (Exception e) {jedisPool.returnBrokenResource(jedis);//logger.error("操作Redis失败", e);System.out.println("错误:[操作Redis失败]");} finally {close(jedis);}}    /**     * Object转换byte[]类型     * @param object     * @return     */    public static byte[] toBytes(Object object){        return serialize(object);    }        /**     * 对象转 byte[]     * @param obj     * @return     */    public static byte[] serialize (Object obj) {        byte[] bytes = null;             ByteArrayOutputStream bos = new ByteArrayOutputStream();             try {                   ObjectOutputStream oos = new ObjectOutputStream(bos);                    oos.writeObject(obj);                   oos.flush();                    bytes = bos.toByteArray ();                 oos.close();                    bos.close();               } catch (IOException ex) {                   ex.printStackTrace();          }             return bytes;       }        /** * 测试 */public static void main(String[] args) {Jedis jedis = JedisUtil.getJedisClient();jedis.set("XC", "1");System.out.println(jedis.get("XC"));System.out.println(jedis.info());JedisUtil.close(jedis);}}

4.   Redis实体类   FRedisModel.java

public class FRedisModel implements Serializable{private String key;private String type;private Object val;private long existtime;

public FRedisModel(String key, String type, Object val, long existtime) {this.key = key;this.type = type;this.val = val;this.existtime = existtime;}public FRedisModel() {}

get方法

set方法

}

说明：  JedisUtil.addAggregate(FRedisModel) 用来存储集合数据的

list :  FRedisModel(String key, "list", Object val, long existtime)

set:  FRedisModel(String key, "set", Object val, long existtime)

map<String,String>:   FRedisModel(String key, "hashStr", Object val, long existtime)

map<String,Object>:  FRedisModel(String key, "hashObj", Object val, long existtime)

注意：存储Map集合，优点特殊，需要区分是对象还是字符串，存储的对象必须是序列化的

   使用方法  JedisUtil.serialize(Obj) 进行序列化

JedisUtil.setString(String key, String value, int timeout)   用来存储普通字符串

JedisUtil.flushDB() 清空Redis所有数据信息

其他方法自己看吧，都有注释的

这里写一些  添加集合数据的示例：

//添加listList<TestUser> list = new ArrayList<TestUser>();for(int i=0;i<100;i++){list.add(new TestUser("哈哈"+new SimpleDateFormat("HHmmssSS").format(new Date()), new SimpleDateFormat("SS").format(new Date()), new SimpleDateFormat("HHmmssSS").format(new Date())));}FRedisModel redisModel_list = new FRedisModel("list_"+UUID.randomUUID().toString(), "list", list, 3600);JedisUtil.addAggregate(redisModel_list);//添加对象 HashmapMap<byte[], byte[]> hashObj = new HashMap<byte[], byte[]>();TestUser t1 = new TestUser("落花雨1111"+new SimpleDateFormat("HHmmssSS").format(new Date()), new SimpleDateFormat("SS").format(new Date()), new SimpleDateFormat("HHmmssSS").format(new Date()));TestUser t2 = new TestUser("落花雨2222"+new SimpleDateFormat("HHmmssSS").format(new Date()), new SimpleDateFormat("SS").format(new Date()), new SimpleDateFormat("HHmmssSS").format(new Date()));TestUser t3 = new TestUser("落花雨3333"+new SimpleDateFormat("HHmmssSS").format(new Date()), new SimpleDateFormat("SS").format(new Date()), new SimpleDateFormat("HHmmssSS").format(new Date()));hashObj.put("1111".getBytes(), JedisUtil.serialize(t1));hashObj.put("2222".getBytes(), JedisUtil.serialize(t2));hashObj.put("3333".getBytes(), JedisUtil.serialize(t3));FRedisModel redisModel_mapObj = new FRedisModel("hash_"+UUID.randomUUID().toString(), "hashObj", hashObj, 3600);JedisUtil.addAggregate(redisModel_mapObj);//添加字符串  HashMapMap<String,String> hashStr = new HashMap<String, String>();hashStr.put("1111", "第一号");hashStr.put("2222", "第二号");hashStr.put("3333", "第三号");FRedisModel redisModel_mapStr = new FRedisModel("hash_"+UUID.randomUUID().toString(), "hashStr", hashStr, 3600);JedisUtil.addAggregate(redisModel_mapStr);//添加setSet<TestUser> set = new HashSet<TestUser>();TestUser t4 = new TestUser("4444"+new SimpleDateFormat("HHmmssSS").format(new Date()), new SimpleDateFormat("SS").format(new Date()), new SimpleDateFormat("HHmmssSS").format(new Date()));TestUser t5 = new TestUser("5555"+new SimpleDateFormat("HHmmssSS").format(new Date()), new SimpleDateFormat("SS").format(new Date()), new SimpleDateFormat("HHmmssSS").format(new Date()));TestUser t6 = new TestUser("6666"+new SimpleDateFormat("HHmmssSS").format(new Date()), new SimpleDateFormat("SS").format(new Date()), new SimpleDateFormat("HHmmssSS").format(new Date()));set.add(t4);set.add(t5);set.add(t6);FRedisModel redisModelset = new FRedisModel("set_"+UUID.randomUUID().toString(), "set", set, 3600);JedisUtil.addAggregate(redisModelset);

5. CatchManage.java  用来处理前台的分页查询所有key的请求，以及通过key来查询详细的数据信息，并返回，相当于service功能

import java.util.ArrayList;import java.util.HashMap;import java.util.List;import java.util.Map;import java.util.Set;import org.apache.commons.lang3.StringUtils;import com.google.gson.Gson;import redis.clients.jedis.Jedis;public class CatchManage {/** * 查询缓存DB中的Key *  * @return */public List<FRedisModel> listKeys(int start,int end) {Jedis jedis = JedisUtil.getJedisClient();Set<String> keySet = jedis.keys("*");List<String> keyList = new ArrayList<String>(keySet);List<FRedisModel> list = new ArrayList<FRedisModel>();for (String key_ : keyList) {FRedisModel fredi = new FRedisModel();fredi.setKey(key_);fredi.setType(jedis.type(key_));long ttl_ = jedis.ttl(key_);fredi.setExisttime(ttl_);list.add(fredi);}JedisUtil.close(jedis);int allnum = keyList.size();start = Integer.valueOf(start);//end = start + Integer.valueOf(end);end = end > list.size() ? list.size() : end;List<FRedisModel> outList = list.subList(start, end);return outList;}/** * 查询缓存DB中的Key   支持分页 * @param start * @param end * @return */public DataGrid<Map<String, Object>> listKeysPageNation(int start,int end) {Jedis jedis = JedisUtil.getJedisClient();Set<String> keySet = jedis.keys("*");List<String> keyList = new ArrayList<String>(keySet);List<FRedisModel> list = new ArrayList<FRedisModel>();for (String key_ : keyList) {FRedisModel fredi = new FRedisModel();fredi.setKey(key_);fredi.setType(jedis.type(key_));long ttl_ = jedis.ttl(key_);fredi.setExisttime(ttl_);list.add(fredi);}JedisUtil.close(jedis);int allnum = keyList.size();start = Integer.valueOf(start);end = end > list.size() ? list.size() : end;//分页显示List<FRedisModel> outList = list.subList(start, end);//包装成DataGridDataGrid<Map<String, Object>> grid = new DataGrid<Map<String, Object>>();List<Map<String, Object>> listmap = new ArrayList<Map<String, Object>>();for (FRedisModel fRedisModel : outList) {Map<String, Object> map = new HashMap<String, Object>();map.put("key", fRedisModel.getKey());map.put("type", fRedisModel.getType());map.put("existtime", fRedisModel.getExisttime());listmap.add(map);}grid.setTotal(allnum);grid.setRows(listmap);return grid;}/** * 通过 key 来查找对应的 值  *  * 数据类型   list hashmap set String * @param key_ * @return */public List<FRedisModel> getValByKey(FRedisModel redisModel) {System.out.println("redis将要查找的数据类型："+redisModel.getType()+"   key:"+redisModel.getKey()+"   存在时间"+redisModel.getExisttime());List<FRedisModel> outList = new ArrayList<FRedisModel>();Jedis jedis = JedisUtil.getJedisClient();if (StringUtils.equalsIgnoreCase(redisModel.getType(), "string")) {redisModel.setVal(jedis.get(redisModel.getKey()));outList.add(redisModel);} else if (StringUtils.equalsIgnoreCase(redisModel.getType(), "hash")) {Set<String> fieldSet = jedis.hkeys(redisModel.getKey());List<String> fiedList = new ArrayList<String>(fieldSet);System.out.println("fieldSet size:"+fieldSet.size());for (String value : fiedList){System.out.println("value->"+value);outList.add(new FRedisModel(redisModel.getKey(), redisModel.getType(), jedis.hget(redisModel.getKey(), value), redisModel.getExisttime()));}} else if (StringUtils.equalsIgnoreCase(redisModel.getType(), "list")) {List valueList = jedis.lrange(redisModel.getKey(), 0, -1);for (Object value : valueList) {outList.add(new FRedisModel(redisModel.getKey(), redisModel.getType(), value, redisModel.getExisttime()));}} else if (StringUtils.equalsIgnoreCase(redisModel.getType(), "set")) {// 由于API的限制，不能对SET类型进行有效的分页操作。所以随机取出10000条记录返回。List valueList = jedis.srandmember(redisModel.getKey(), 10000);for (Object value : valueList) {outList.add(new FRedisModel(redisModel.getKey(), redisModel.getType(), value, redisModel.getExisttime()));}}JedisUtil.close(jedis);return outList;}}

由于不能泄露代码，所以只写了主要的部分，看懂了这些，其他的controller层应该很好写的。

时间紧，写的比较粗糙，望见谅！