SpringBoot对redis批量存取数据

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本文链接： https://blog.csdn.net/qq_19734597/article/details/102553511

springboot中的redisTemplate封装了redis批处理数据的接口，我们使用redisTemplate可以直接进行批量数据的get和set。

package com.huateng.applacation.service;
 
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.dao.DataAccessException;
import org.springframework.data.redis.connection.RedisConnection;
import org.springframework.data.redis.core.RedisCallback;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Component;
 
import java.util.List;
 
/**
 * @program: applacation
 * @description:
 * @author: daiwenlong
 * @create: 2019-01-24 13:26
 **/
@Component
public class RedisService {
 
 
    @Autowired
    @Qualifier("stringRedisTemplate")
    private StringRedisTemplate redisTemplate;
 
    public void insertKey(List<String> keys, String value){
 
 
        //批量get数据
        List<Object> list = redisTemplate.executePipelined(new RedisCallback<String>() {
            @Override
            public String doInRedis(RedisConnection connection) throws DataAccessException {
                for (String key : keys) {
                    connection.get(key.getBytes());
                }
                return null;
            }
        });
 
        //批量set数据
        redisTemplate.executePipelined(new RedisCallback<String>() {
            @Override
            public String doInRedis(RedisConnection connection) throws DataAccessException {
                for (int i=0;i<keys.size();i++) {
                    connection.set(keys.get(i).getBytes(),value.getBytes());
                }
                return null;
            }
        });
 
    }
}
 

如果要设置 key 的过期时间，通过 setEx() 来做就可以了，过期时间单位是秒，相关代码如下：

/**
 * 合同批量导入redis
 *
 * @param contractBOList
 * @param expire
 * @return com.openailab.oascloud.common.model.ResponseResult
 * @author zxzhang
 * @date 2019/10/14
 */
@Override
public void contractBatchSetRedis(String contractBOList, long expire) {
    List<ContractBO> contracts = JSONObject.parseArray(contractBOList, ContractBO.class);
    if (contracts == null || contracts.size() == 0) {
        return;
    }
    //批量set数据
    redisUtil.getRedisTemplate().executePipelined((RedisCallback<String>) connection -> {
        for (ContractBO contract : contracts) {
            connection.setEx((RedisPrefixConst.CONTRACT_PREFIX + contract.getBusinessCode() + RedisPrefixConst.UNDERLINE_SEPARATOR + contract.getContractNo()).getBytes(), expire, JSONObject.toJSONString(contract).getBytes());
        }
        return null;
    });
}

/**
 * 合同批量获取redis
 *
 * @param contractBOList
 * @return java.lang.String
 * @author zxzhang
 * @date 2019/10/14
 */
@Override
public List<Object> contractBatchGetRedis(String contractBOList) {
    List<ContractBO> contracts = JSONObject.parseArray(contractBOList, ContractBO.class);
    if (contracts == null || contracts.size() == 0) {
        return null;
    }
    List<Object> list = redisUtil.getRedisTemplate().executePipelined((RedisCallback<String>) connection -> {
        for (ContractBO contract : contracts) {
            connection.get((RedisPrefixConst.CONTRACT_PREFIX + contract.getBusinessCode() + RedisPrefixConst.UNDERLINE_SEPARATOR + contract.getContractNo()).getBytes());
        }
        return null;
    });
    return list;
}

SpringBoot对redis批量存取介绍到此结束。