8.1. Spring Data Redis
8.1.1. pom.xml
<dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-redis</artifactId> </dependency>
8.1.2. springframework-servlet.xml
<!-- Redis Connection Factory --> <bean id="jedisConnFactory" class="org.springframework.data.redis.connection.jedis.JedisConnectionFactory" p:host-name="192.168.2.1" p:port="6379" p:use-pool="true" /> <!-- redis template definition --> <bean id="redisTemplate" class="org.springframework.data.redis.core.RedisTemplate" p:connection-factory-ref="jedisConnFactory" />
例 8.1. Spring Data Redis Example
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:context="http://www.springframework.org/schema/context"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd">
<mvc:resources location="/images/" mapping="/images/**" />
<mvc:resources location="/css/" mapping="/css/**" />
<context:component-scan base-package="cn.netkiller.controller" />
<mvc:annotation-driven />
<bean
class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="viewClass"
value="org.springframework.web.servlet.view.JstlView" />
<property name="prefix" value="/WEB-INF/jsp/" />
<property name="suffix" value=".jsp" />
<!-- <property name="viewNames" value="*.jsp" /> -->
</bean>
<bean id="configuracion"
class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="location" value="classpath:resources/development.properties" />
</bean>
<bean id="dataSource"
class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="${jdbc.driverClassName}" />
<property name="url" value="${jdbc.url}" />
<property name="username" value="${jdbc.username}" />
<property name="password" value="${jdbc.password}" />
</bean>
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource" />
</bean>
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="cn.netkiller.mapper" />
</bean>
<bean id="userService" class="cn.netkiller.service.UserService">
</bean>
<!-- Redis Connection Factory -->
<bean id="jedisConnFactory"
class="org.springframework.data.redis.connection.jedis.JedisConnectionFactory"
p:host-name="192.168.2.1" p:port="6379" p:use-pool="true" />
<!-- redis template definition -->
<bean id="redisTemplate" class="org.springframework.data.redis.core.RedisTemplate"
p:connection-factory-ref="jedisConnFactory" />
</beans>
8.1.3. Controller
package cn.netkiller.controller;
import javax.annotation.Resource;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.ListOperations;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.serializer.StringRedisSerializer;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;
import cn.netkiller.model.User;
@Controller
public class CacheController {
// inject the actual template
@Autowired
private RedisTemplate<String, String> template;
// inject the template as ListOperations
@Resource(name = "redisTemplate")
private ListOperations<String, String> listOps;
@RequestMapping("/cache")
public ModelAndView cache() {
String message = "";
User user = new User();
user.setId("1");
user.setName("Neo");
user.setAge(30);
String key = "user";
listOps.leftPush(key, user.toString());
message = listOps.leftPop(key);
template.setKeySerializer(new StringRedisSerializer());
template.setValueSerializer(new StringRedisSerializer());
template.opsForValue().set("key", user.toString());
return new ModelAndView("index/index", "variable", message);
}
}
8.1.4. index.jsp
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
<br>
<div style="text-align:center">
<h2>
${variable}
</h2>
</div>
</body>
</html>
8.1.5. 删除 key
private void cleanNewToday() {
long begin = System.currentTimeMillis();
redisTemplate.delete("news:today");
long end = System.currentTimeMillis();
logger.info("Schedule clean redis {} 耗时 {} 秒", "cleanNewFlash()", (end-begin) / 1000 );
}
8.1.6. 测试
请求URL http://your.domain.com/your.html
[root@master ~]# redis-cli redis 127.0.0.1:6379> keys * 1) "\xac\xed\x00\x05t\x00\x04user" 2) "key" redis 127.0.0.1:6379> get key "\xac\xed\x00\x05t\x00\x1dUser [id=1, name=Neo, age=30]"
 |
提示 |
|---|---|
|
Spring Redis 默认使用 Byte数据类型存储Key，在redis-cli中会看到 "\xac\xed\x00\x05t\x00\x04" 前缀不方便get操作，所以我们会设置使用字符串，通过 template.setKeySerializer(new StringRedisSerializer()); 实现 |
8.1.7. ZSET 数据类型
//添加 一个 set 集合
SetOperations<String, Object> set = redisTemplate.opsForSet();
set.add("Member", "neo");
set.add("Member", "36");
set.add("Member", "178cm");
//输出 set 集合
System.out.println(set.members("Member"));
//添加有序的 set 集合
ZSetOperations<String, Object> zset = redisTemplate.opsForZSet();
zset.add("zMember", "neo", 0);
zset.add("zMember", "36", 1);
zset.add("zMember", "178cm", 2);
//输出有序 set 集合
System.out.println(zset.rangeByScore("zMember", 0, 2));
package cn.netkiller.api.restful;
import java.util.Set;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import common.pojo.ResponseRestful;
@RestController
@RequestMapping("/news")
public class NewsRestController {
@Autowired
private RedisTemplate<String, String> redisTemplate;
@RequestMapping(value = "/flash/{count}")
public ResponseRestful flash(@PathVariable("count") long count) {
if(count == 0L) {
count=10L;
}
Set<String> news = this.redisTemplate.opsForZSet().reverseRange("news:flash", 0, count);
if (news == null) {
return new ResponseRestful(false, 10, "没有查询到结果", news);
}
return new ResponseRestful(true, 0, "返回数据: " + news.size() + " 条", news);
}
public void addRecentUser(long userId, String name) {
String key = RedisKeyGenerator.genRecentBrowsingPositionsKey(String.valueOf(userId));
// 获取已缓存的最近浏览的职位
ZSetOperations<String, String> zSetOperations = redisTempalte.opsForZSet();
//zset内部是按分数来排序的，这里用当前时间做分数
zSetOperations.add(key, name, System.currentTimeMillis());
zSetOperations.removeRange(key, 0, -6);
}
}
8.1.8. Hash
HashOperations<String, Object, Object> hash = redisTemplate.opsForHash();
Map<String,Object> map = new HashMap<String,Object>();
map.put("name", "neo");
map.put("age", "36");
hash.putAll("member", map);
System.out.println(hash.entries("member"));
8.1.9. List
ListOperations<String, Object> list = redisTemplate.opsForList();
list.rightPush("books", "Linux");
list.rightPush("books", "Java");
System.out.println(list.range("books", 0, 1));
原文出处：Netkiller 系列 手札
本文作者：陈景峯
转载请与作者联系，同时请务必标明文章原始出处和作者信息及本声明。
时间： 2025-01-02 10:49:41