Java redis存Map对象类型数据怎么实现

背景描述

项目需要将设备采集到的最新经纬度信息存入redis缓存中，方便及时查询检索。考虑到根据检索条件不同，所查询的设备不同。采取将数据以map类型存入redis缓存，在此记录一下。

实体类

注：一定要实现序列化接口

父类

public class Redis implements Serializable{

    private String name;
    private Integer age;

    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public Integer getAge() {
        return age;
    }
    public void setAge(Integer age) {
        this.age = age;
    }
}

子类

import java.io.Serializable;

public class RedisCustom extends Redis {

    private String stuCode;

    public String getStuCode() {
        return stuCode;
    }
    public void setStuCode(String stuCode) {
        this.stuCode = stuCode;
    }
}

方法1°

redisTemplate.opsForHash()

示例代码

@Controller
@RequestMapping("/redis")
public class RedisController {

    @Autowired
    private RedisTemplate redisTemplate;

    /**
     * @param
     * @return
     */
    @RequestMapping(value = "/setRedisData", method = RequestMethod.GET)
    @ResponseBody
    public Map<String, Object> setRedisData() {

        RedisCustom redis1 = new RedisCustom();
        redis1.setName("小明");
        redis1.setAge(12);
        redis1.setStuCode("36");
        RedisCustom redis2 = new RedisCustom();
        redis2.setName("小红");
        redis2.setAge(11);
        redis2.setStuCode("24");

        //构造存入redis中的map
        Map<String, RedisCustom> redisDataMap = new HashMap<String, RedisCustom>();
        redisDataMap.put(redis1.getName(), redis1);
        redisDataMap.put(redis2.getName(), redis2);

        //存入redis
        redisTemplate.opsForHash().putAll("redisTest",redisDataMap);
        //获取缓存内容
        Map<String,RedisCustom> resultMap = redisTemplate.opsForHash().entries("redisTest");
        
        //List<RedisCustom> reslutMapList = redisTemplate.opsForHash().values("redisTest");
        //Set<RedisCustom> resultMapSet = redisTemplate.opsForHash().keys("redisTest");
        //RedisCustom value = (RedisCustom)redisTemplate.opsForHash().get("redisTest","小明");
        
        return ResponseData.success(resultMap);
    }
}

结果

参考
https://www.yisu.com/article/246815.htm

方法2°

将对象转成byte[]

序列化及反序列化工具类

import java.io.*;

/**
 * 序列化及反序列化工具类
 */
public class SerializeObjectTool {
    //序列化
    public static byte[] serialize(Object obj) {
        ObjectOutputStream obi = null;
        ByteArrayOutputStream bai = null;
        try {
            bai = new ByteArrayOutputStream();
            obi = new ObjectOutputStream(bai);
            obi.writeObject(obj);
            byte[] byt = bai.toByteArray();
            return byt;
        } catch (IOException e) {
            e.printStackTrace();
        }
        return null;
    }

    // 反序列化
    public static Object unserizlize(byte[] byt) {
        ObjectInputStream oii = null;
        ByteArrayInputStream bis = null;
        bis = new ByteArrayInputStream(byt);
        try {
            oii = new ObjectInputStream(bis);
            Object obj = oii.readObject();
            return obj;
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }
}

示例代码

@Controller
@RequestMapping("/redis")
public class RedisController {
    /**
     * @param
     * @return
     */
    @RequestMapping(value = "/setRedisData", method = RequestMethod.GET)
    @ResponseBody
    public Map<String, Object> setRedisData() {
    
        RedisCustom redis1 = new RedisCustom();
        redis1.setName("小明");
        redis1.setAge(12);
        redis1.setStuCode("36");
        RedisCustom redis2 = new RedisCustom();
        redis2.setName("小红");
        redis2.setAge(11);
        redis2.setStuCode("24");

        //构造存入redis中的map
        Map<String, RedisCustom> redisDataMap = new HashMap<String, RedisCustom>();
        redisDataMap.put(redis1.getName(), redis1);
        redisDataMap.put(redis2.getName(), redis2);

        //连接redis
        Jedis redis = new Jedis("xx.xx.xxx.xx", 6379);
        redis.auth("xxxxxxxxxxx");
        
        //存
        byte[] personByte = SerializeObjectTool.serialize(redisDataMap);
        redis.set("redisData".getBytes(), personByte);
        //取
        byte[] byt = redis.get("redisData".getBytes());
        Object obj = SerializeObjectTool.unserizlize(byt);

        Map<String, RedisCustom> redisData = (Map<String, RedisCustom>) obj;

        return ResponseData.success(redisData);
    }
}

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