Java实现Redis持久化到数据库的关键方法

import java.util.Date;
import java.util.Iterator;
import java.util.Set;
 
import redis.clients.jedis.Jedis;
 
import com.redis.entity.RedisTable;
 
public class RedisPersistence {
    /**
     * 存储所有的redis对象方法
     */
    public static void saveAllRedis(final String redisIp,final int redisPort,final String appCode) {
        Jedis redis = new Jedis(redisIp, redisPort);// 连接redis
        // redis.auth("redis");//验证密码
        // KEY操作
        Set keys = redis.keys("*");// 列出所有的key，查找特定的key如：redis.keys("foo")
        Iterator t1 = keys.iterator();
        while (t1.hasNext()) {
            Object obj1 = t1.next();
            saveRedisObject(redis, obj1 + "", redisIp, redisPort + "", appCode);
        }
    }
     
    /**
     * 存储单个对象
     * @param redis
     * @param redisKey
     * @param macIp
     * @param port
     * @param appCode
     */
    private static void saveRedisObject(final Jedis  redis,final String redisKey,final String macIp,final String port,final String appCode) {
        String redisType = redis.type(redisKey);
        RedisTable redisTable = new RedisTable();
        redisTable.setAppCode(appCode);
        redisTable.setCreateTime(new Date());
        redisTable.setMacIp(macIp);
        redisTable.setPort(port);
        redisTable.setRedisKey(redisKey);
        redisTable.setRedisType(redisType);
        redisTable.setRemark("");
        redisTable.setUpdateTime(new Date());
        //set集合
        if("set".equalsIgnoreCase(redisType)){
            Set<string> setStrings  = redis.smembers(redisKey);//获取key的所有set集合
            if(null != setStrings && !setStrings.isEmpty()){
                Iterator setIterator = setStrings.iterator() ;   
                   while(setIterator.hasNext()){   
                       Object obj1 = setIterator.next();  
                       redisTable.setRedisValue(obj1+"");
                       printRedis(redisTable);//保存每一个set记录
                   }  
            }
        //hash集合
        }else if("hash".equalsIgnoreCase(redisType)){
            Set<string> hashSets = redis.hkeys(redisKey);
            if(null != hashSets && !hashSets.isEmpty()){
                Iterator setIterator = hashSets.iterator() ;   
                   while(setIterator.hasNext()){   
                       String objectName = setIterator.next()+"";  
                       redisTable.setObjectName(objectName);
                       redisTable.setRedisValue(redis.hget(redisKey, objectName));
                       printRedis(redisTable);//保存每一个set记录
                   }  
            }
        //list集合
        }else if("list".equalsIgnoreCase(redisType)){
            Long listLen = redis.llen(redisKey);
            for (Long i = 0L; i < listLen; i++) {
                redisTable.setRedisValue(redis.lindex(redisKey, i));
                printRedis(redisTable);
            }
        //sortedset集合
        }else if("sortedset".equalsIgnoreCase(redisType)){
//          Long redisLenth = redis.zcard(redisKey);
            Set<string> sortedsets = redis.zrange(redisKey, 0, -1);
            if(null != sortedsets && !sortedsets.isEmpty()){
                Iterator setIterator = sortedsets.iterator() ;   
                   while(setIterator.hasNext()){   
                       String sortedMember = setIterator.next() +"";  
                       redisTable.setRedisValue(sortedMember);
                       redisTable.setScore("" +redis.zscore(redisKey, sortedMember));
                       printRedis(redisTable);//保存每一个sortedset记录
                   }  
            }
        //string集合
        }else if("string".equalsIgnoreCase(redisType)){
            redisTable.setRedisValue(redis.get(redisKey));
            printRedis(redisTable);//保存记录
        }else{
            System.out.println("UnknowRedisType-----redisType: " +redisType+"      objValue: "+redis.get(redisKey));
        }
    }
 
    //打印输出
    public static void printRedis (RedisTable redisTable) {
        System.out.println("redisType:"+redisTable.getRedisType()  
                        + " redisKey:"+redisTable.getRedisKey()
                        + " ObjectName:"+redisTable.getObjectName()
                        + " redisValue:"+redisTable.getRedisValue()
                        + " redisScore:"+redisTable.getScore()
        );
    }
     
    public static void main(String[] args) {
        String redisIp = "127.0.0.1";//redis的IP地址
        int redisPort = 6379;//redis的端口号
        String appCode = "FUYOU";//根据不同的应用区分的appcode
        saveAllRedis(redisIp,redisPort,appCode);
    }
}
</string></string></string>
 
其中的appCode是不需要的，这里只是为了针对于不同的应用，可以使用同一个redis进行持久化备份而已（通过appcode来区分）。
其中使用的RedisTable实例如下：
 
import java.util.Date;
 
public class RedisTable {
    private Long redisId; //保存redis的主键ID
    private String redisType;//redis的类型如：set/list/hash/sortedset/string
    private String redisKey;//保存redis时使用的key
    private String objectName;//此属性主要用于hash数据结构时，保存member的
    private String redisValue;//存储的redis的值
    private String keyToken;//保存Token时，为区分拼接的字符串
    private String score;//此属性为sortedset数据结构时，保存的score值
    private Date createTime;//创建时间
    private Date updateTime;//更新时间
    private String macIp;//redis的IP地址  当然此处也可以存储mac地址
    private String port;//redis使用的端口号
    private String appCode;//应用区分码
    private String remark;//备注
    private String isModify;//是否修改。此属性可以用于增量备份时，即在每个redis存储时可以更具key多存储一个属性isModify。 如果有修改，则置为 Y,否则为N.
     
///////////////////////此处省略 setter  and getter 方法////////////////////////
 
 
}
posted on 2016-08-16 17:32 爷的眼睛闪亮阅读(7373) 评论(0) 收藏举报