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
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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
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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°
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1 |
redisTemplate.opsForHash() |
示例代码
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@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
方法2°
将对象转成byte[]
序列化及反序列化工具类
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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
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@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); } } |
参考
https://blog.csdn.net/chris_111x/article/details/85236458
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原文链接：https://blog.csdn.net/qq_28869233/article/details/95094968
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