标签:primary remove warning final art template ati conf war
如何在spring-boot中使用Redis工具类
修改pom.xml文件
新增spring-boot-starter-data-redis配置
org.springframework.boot
spring-boot-starter-data-redis
修改application.yml
新增Redis配置
server:
port: 6660
redis:
host: 127.0.0.1
port: 6379
password:
新增config目录
RedisConfig.java文件
package com.example.redisdemo.config;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cache.annotation.CachingConfigurerSupport;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Primary;
import org.springframework.data.redis.connection.RedisConnectionFactory;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.serializer.JdkSerializationRedisSerializer;
import org.springframework.data.redis.serializer.StringRedisSerializer;
/**
* @author komiles@163.com
* @date 2020-05-22 14:40
*/
@Configuration
public class RedisConfig extends CachingConfigurerSupport {
@Autowired
RedisConnectionFactory redisConnectionFactory;
/**
* 实例化redisTempate对象
* primary 在autowired时,优先选择我注册的bean
* 因为在redis 框架中有注册一个StringRedisTemplate,避免注入冲突
* @return
*/
@Bean
@Primary
public RedisTemplate RedisTemplate(){
RedisTemplate redisTemplate = new RedisTemplate();
initRedisTemplate(redisTemplate, redisConnectionFactory);
return redisTemplate;
}
/**
* 设置数据存入Redis的序列化方式
* @param redisTemplate
* @param factory
*/
private void initRedisTemplate(RedisTemplate redisTemplate, RedisConnectionFactory factory) {
redisTemplate.setKeySerializer(new StringRedisSerializer());
redisTemplate.setHashKeySerializer(new StringRedisSerializer());
redisTemplate.setHashValueSerializer(new JdkSerializationRedisSerializer());
redisTemplate.setValueSerializer(new JdkSerializationRedisSerializer());
redisTemplate.setConnectionFactory(factory);
}
}
新增RedisUtil.java文件
package com.example.redisdemo.util;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.TimeUnit;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.stereotype.Component;
import org.springframework.util.CollectionUtils;
/**
* @author komiles@163.com
* @date 2020-05-22 15:31
*/
@Component
public final class RedisUtil {
@Autowired
private RedisTemplate redisTemplate;
// =============================common============================
/**
* 指定缓存失效时间
*
* @param key 键
* @param time 时间(秒)
* @return
*/
public boolean expire(String key, long time) {
try {
if (time > 0) {
redisTemplate.expire(key, time, TimeUnit.SECONDS);
}
return true;
} catch (Exception e) {
e.printStackTrace();
return false;
}
}
/**
* 根据key 获取过期时间
*
* @param key 键 不能为null
* @return 时间(秒) 返回0代表为永久有效
*/
public long getExpire(String key) {
return redisTemplate.getExpire(key, TimeUnit.SECONDS);
}
/**
* 判断key是否存在
*
* @param key 键
* @return true 存在 false不存在
*/
public boolean hasKey(String key) {
try {
return redisTemplate.hasKey(key);
} catch (Exception e) {
e.printStackTrace();
return false;
}
}
/**
* 删除缓存
*
* @param key 可以传一个值 或多个
*/
@SuppressWarnings("unchecked")
public void del(String... key) {
if (key != null && key.length > 0) {
if (key.length == 1) {
redisTemplate.delete(key[0]);
} else {
redisTemplate.delete(CollectionUtils.arrayToList(key));
}
}
}
// ============================String=============================
/**
* 普通缓存获取
*
* @param key 键
* @return 值
*/
public Object get(String key) {
return key == null ? null : redisTemplate.opsForValue().get(key);
}
/**
* 普通缓存放入
*
* @param key 键
* @param value 值
* @return true成功 false失败
*/
public boolean set(String key, Object value) {
try {
redisTemplate.opsForValue().set(key, value);
return true;
} catch (Exception e) {
e.printStackTrace();
return false;
}
}
/**
* 普通缓存放入并设置时间
*
* @param key 键
* @param value 值
* @param time 时间(秒) time要大于0 如果time小于等于0 将设置无限期
* @return true成功 false 失败
*/
public boolean set(String key, Object value, long time) {
try {
if (time > 0) {
redisTemplate.opsForValue().set(key, value, time, TimeUnit.SECONDS);
} else {
set(key, value);
}
return true;
} catch (Exception e) {
e.printStackTrace();
return false;
}
}
/**
* 递增
*
* @param key 键
* @param delta 要增加几(大于0)
* @return
*/
public long incr(String key, long delta) {
if (delta 0) {
throw new RuntimeException("递增因子必须大于0");
}
return redisTemplate.opsForValue().increment(key, delta);
}
/**
* 递减
*
* @param key 键
* @param delta 要减少几(小于0)
* @return
*/
public long decr(String key, long delta) {
if (delta 0) {
throw new RuntimeException("递减因子必须大于0");
}
return redisTemplate.opsForValue().increment(key, -delta);
}
// ================================Map=================================
/**
* HashGet
*
* @param key 键 不能为null
* @param item 项 不能为null
* @return 值
*/
public Object hget(String key, String item) {
return redisTemplate.opsForHash().get(key, item);
}
/**
* 获取hashKey对应的所有键值
*
* @param key 键
* @return 对应的多个键值
*/
public Map
新增Test2Controller.java
package com.example.redisdemo.controller;
import com.example.redisdemo.dao.Person;
import com.example.redisdemo.util.RedisUtil;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.repository.query.Param;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
/**
* @author komiles@163.com
* @date 2020-05-22 15:13
*/
@RestController
@RequestMapping("/test2")
public class Test2Controller {
static final String USER_LIST_HASH_KEY = "student_list_0522_02";
@Autowired
RedisUtil redisUtil;
@GetMapping("/set")
public String setStr(@Param("key") String key, @Param("value") String value){
redisUtil.set(key,value);
return key;
}
@GetMapping("/get")
public String setStr(@Param("key") String key){
return redisUtil.get(key).toString();
}
@GetMapping("/hashSet")
public String setHash(){
Person person = new Person();
person.setId("1").setName("张三");
redisUtil.hset(USER_LIST_HASH_KEY,person.getId(),person);
return "OK";
}
@GetMapping("/hashGet")
public Object getHash(){
Person person = new Person();
person.setId("1").setName("张三");
return redisUtil.hget(USER_LIST_HASH_KEY,"1");
}
}
新增实体类 Person.java
用来测试
package com.example.redisdemo.dao;
import java.io.Serializable;
import lombok.Data;
import lombok.experimental.Accessors;
/**
* @author komiles@163.com
* @date 2020-05-22 15:11
*/
@Data
@Accessors(chain = true)
public class Person implements Serializable {
private static final Long serialVersionUID = 99999L;
private String id;
private String name;
}
调用controller.java
- http://localhost:6660/test2/set?key=user_name&value=kongming
项目demo地址
- https://github.com/KoMiles/spring-example/tree/master/redis-demo
【spring-boot】配置Redis工具类
标签:primary remove warning final art template ati conf war
原文地址:https://www.cnblogs.com/wangkongming/p/12938709.html