Java redis存Map对象类型数据怎么实现

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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 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 redisDataMap = new HashMap();        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 resultMap = redisTemplate.opsForHash().entries("redisTest");                //List reslutMapList = redisTemplate.opsForHash().values("redisTest");        //Set 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 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 redisDataMap = new HashMap();        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 redisData = (Map) obj;        return ResponseData.success(redisData);    }}

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