Spring Boot整合Spring Cache及Redis过程解析
人气:0这篇文章主要介绍了Spring Boot整合Spring Cache及Redis过程解析,文中通过示例代码介绍的非常详细，对大家的学习或者工作具有一定的参考学习价值,需要的朋友可以参考下
1.安装redis
a.由于官方是没有Windows版的，所以我们需要下载微软开发的redis，网址：
https://github.com/MicrosoftArchive/redis/releases
b.解压后，在redis根目录打开cmd界面，输入：redis-server.exe redis.windows.conf，启动redis（关闭cmd窗口即停止）
2.使用
a.创建SpringBoot工程，选择maven依赖
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-redis</artifactId>
</dependency>
.....
</dependencies>
b.配置 application.yml 配置文件
server:
port: 8080
spring:
# redis相关配置
redis:
database: 0
host: localhost
port: 6379
password:
jedis:
pool:
# 连接池最大连接数（使用负值表示没有限制）
max-active: 8
# 连接池最大阻塞等待时间（使用负值表示没有限制）
max-wait: -1ms
# 连接池中的最大空闲连接
max-idle: 5
# 连接池中的最小空闲连接
min-idle: 0
# 连接超时时间（毫秒）默认是2000ms
timeout: 2000ms
# thymeleaf热更新
thymeleaf:
cache: false
c.创建RedisConfig配置类
@Configuration
@EnableCaching //开启缓存
public class RedisConfig {
/**
* 缓存管理器
* @param redisConnectionFactory
* @return
*/
@Bean
public RedisCacheManager cacheManager(RedisConnectionFactory redisConnectionFactory) {
// 生成一个默认配置，通过config对象即可对缓存进行自定义配置
RedisCacheConfiguration config = RedisCacheConfiguration.defaultCacheConfig();
// 设置缓存的默认过期时间，也是使用Duration设置
config = config.entryTtl(Duration.ofMinutes(30))
// 设置 key为string序列化
.serializeKeysWith(RedisSerializationContext.SerializationPair.fromSerializer(new StringRedisSerializer()))
// 设置value为json序列化
.serializeValuesWith(RedisSerializationContext.SerializationPair.fromSerializer(jackson2JsonRedisSerializer()))
// 不缓存空值
.disableCachingNullValues();
// 对每个缓存空间应用不同的配置
Map<String, RedisCacheConfiguration> configMap = new HashMap<>();
configMap.put("userCache", config.entryTtl(Duration.ofSeconds(60)));
// 使用自定义的缓存配置初始化一个cacheManager
RedisCacheManager cacheManager = RedisCacheManager.builder(redisConnectionFactory)
//默认配置
.cacheDefaults(config)
// 特殊配置（一定要先调用该方法设置初始化的缓存名，再初始化相关的配置）
.initialCacheNames(configMap.keySet())
.withInitialCacheConfigurations(configMap)
.build();
return cacheManager;
}
/**
* Redis模板类redisTemplate
* @param factory
* @return
*/
@Bean
public RedisTemplate redisTemplate(RedisConnectionFactory factory) {
RedisTemplate<String, Object> template = new RedisTemplate<>();
template.setConnectionFactory(factory);
// key采用String的序列化方式
template.setKeySerializer(new StringRedisSerializer());
// hash的key也采用String的序列化方式
template.setHashKeySerializer(new StringRedisSerializer());
// value序列化方式采用jackson
template.setValueSerializer(jackson2JsonRedisSerializer());
// hash的value序列化方式采用jackson
template.setHashValueSerializer(jackson2JsonRedisSerializer());
return template;
}
/**
* json序列化
* @return
*/
private RedisSerializer<Object> jackson2JsonRedisSerializer() {
//使用Jackson2JsonRedisSerializer来序列化和反序列化redis的value值
Jackson2JsonRedisSerializer<Object> serializer = new Jackson2JsonRedisSerializer<>(Object.class);
//json转对象类，不设置默认的会将json转成hashmap
ObjectMapper mapper = new ObjectMapper();
mapper.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);
mapper.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL);
serializer.setObjectMapper(mapper);
return serializer;
}
}
d.创建entity实体类
public class User implements Serializable {
private int id;
private String userName;
private String userPwd;
public User(){}
public User(int id, String userName, String userPwd) {
this.id = id;
this.userName = userName;
this.userPwd = userPwd;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getUserName() {
return userName;
}
public void setUserName(String userName) {
this.userName = userName;
}
public String getUserPwd() {
return userPwd;
}
public void setUserPwd(String userPwd) {
this.userPwd = userPwd;
}
}
e.创建Service
@Service
public class UserService {
//查询：先查缓存是是否有，有则直接取缓存中数据，没有则运行方法中的代码并缓存
@Cacheable(value = "userCache", key = "'user:' + #userId")
public User getUser(int userId) {
System.out.println("执行此方法，说明没有缓存");
return new User(userId, "用户名(get)_" + userId, "密码_" + userId);
}
//添加：运行方法中的代码并缓存
@CachePut(value = "userCache", key = "'user:' + #user.id")
public User addUser(User user){
int userId = user.getId();
System.out.println("添加缓存");
return new User(userId, "用户名(add)_" + userId, "密码_" + userId);
}
//删除：删除缓存
@CacheEvict(value = "userCache", key = "'user:' + #userId")
public boolean deleteUser(int userId){
System.out.println("删除缓存");
return true;
}
@Cacheable(value = "common", key = "'common:user:' + #userId")
public User getCommonUser(int userId) {
System.out.println("执行此方法，说明没有缓存（测试公共配置是否生效）");
return new User(userId, "用户名(common)_" + userId, "密码_" + userId);
}
}
f.创建Controller
@RestController
@RequestMapping("/user")
public class UserController {
@Resource
private UserService userService;
@RequestMapping("/getUser")
public User getUser(int userId) {
return userService.getUser(userId);
}
@RequestMapping("/addUser")
public User addUser(User user){
return userService.addUser(user);
}
@RequestMapping("/deleteUser")
public boolean deleteUser(int userId){
return userService.deleteUser(userId);
}
@RequestMapping("/getCommonUser")
public User getCommonUser(int userId) {
return userService.getCommonUser(userId);
}
}
@Controller
public class HomeController {
//默认页面
@RequestMapping("/")
public String login() {
return "test";
}
}
g.在 templates 目录下，写书 test.html 页面
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>test</title>
<style type="text/css">
.row{
margin:10px 0px;
}
.col{
display: inline-block;
margin:0px 5px;
}
</style>
</head>
<body>
<div>
<h1>测试</h1>
<div class="row">
<label>用户ID：</label><input id="userid-input" type="text" name="userid"/>
</div>
<div class="row">
<div class="col">
<button id="getuser-btn">获取用户</button>
</div>
<div class="col">
<button id="adduser-btn">添加用户</button>
</div>
<div class="col">
<button id="deleteuser-btn">删除用户</button>
</div>
<div class="col">
<button id="getcommonuser-btn">获取用户(common)</button>
</div>
</div>
<div class="row" id="result-div"></div>
</div>
</body>
<script src="https://code.jquery.com/jquery-3.1.1.min.js"></script>
<script>
$(function() {
$("#getuser-btn").on("click",function(){
var userId = $("#userid-input").val();
$.ajax({
url: "/user/getUser",
data: {
userId: userId
},
dataType: "json",
success: function(data){
$("#result-div").text("id[" + data.id + ", userName[" + data.userName + "], userPwd[" + data.userPwd + "]");
},
error: function(e){
$("#result-div").text("系统错误！");
},
})
});
$("#adduser-btn").on("click",function(){
var userId = $("#userid-input").val();
$.ajax({
url: "/user/addUser",
data: {
id: userId
},
dataType: "json",
success: function(data){
$("#result-div").text("id[" + data.id + ", userName[" + data.userName + "], userPwd[" + data.userPwd + "]");
},
error: function(e){
$("#result-div").text("系统错误！");
},
})
});
$("#deleteuser-btn").on("click",function(){
var userId = $("#userid-input").val();
$.ajax({
url: "/user/deleteUser",
data: {
userId: userId
},
dataType: "json",
success: function(data){
$("#result-div").text(data);
},
error: function(e){
$("#result-div").text("系统错误！");
},
})
});
$("#getcommonuser-btn").on("click",function(){
var userId = $("#userid-input").val();
$.ajax({
url: "/user/getCommonUser",
data: {
userId: userId
},
dataType: "json",
success: function(data){
$("#result-div").text("id[" + data.id + ", userName[" + data.userName + "], userPwd[" + data.userPwd + "]");
},
error: function(e){
$("#result-div").text("系统错误！");
},
})
});
});
</script>
</html>
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