3. Spring Boot 1.2.5使用redis做数据缓存

1 添加redis支持

在pom.xml中添加

Xml代码  

1. <dependency>  
2.           <groupId>org.springframework.boot</groupId>  
3.           <artifactId>spring-boot-starter-redis</artifactId>  
4.       </dependency>  

  <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-redis</artifactId>
        </dependency>

 

2 redis配置

Java代码  

1. package com.wisely.ij.config;  
2.   
3. import com.fasterxml.jackson.annotation.JsonAutoDetect;  
4. import com.fasterxml.jackson.annotation.PropertyAccessor;  
5. import com.fasterxml.jackson.databind.ObjectMapper;  
6. import org.springframework.cache.CacheManager;  
7. import org.springframework.cache.annotation.CachingConfigurerSupport;  
8. import org.springframework.cache.annotation.EnableCaching;  
9. import org.springframework.cache.interceptor.KeyGenerator;  
10. import org.springframework.context.annotation.Bean;  
11. import org.springframework.context.annotation.Configuration;  
12. import org.springframework.data.redis.cache.RedisCacheManager;  
13. import org.springframework.data.redis.connection.RedisConnectionFactory;  
14. import org.springframework.data.redis.core.RedisTemplate;  
15. import org.springframework.data.redis.core.StringRedisTemplate;  
16. import org.springframework.data.redis.serializer.Jackson2JsonRedisSerializer;  
17.   
18. import java.lang.reflect.Method;  
19.   
20.   
21. @Configuration  
22. @EnableCaching  
23. public class RedisConfig extends CachingConfigurerSupport{  
24.   
25.     @Bean  
26.     public KeyGenerator wiselyKeyGenerator(){  
27.         return new KeyGenerator() {  
28.             @Override  
29.             public Object generate(Object target, Method method, Object... params) {  
30.                 StringBuilder sb = new StringBuilder();  
31.                 sb.append(target.getClass().getName());  
32.                 sb.append(method.getName());  
33.                 for (Object obj : params) {  
34.                     sb.append(obj.toString());  
35.                 }  
36.                 return sb.toString();  
37.             }  
38.         };  
39.   
40.     }  
41.   
42.     @Bean  
43.     public CacheManager cacheManager(  
44.             @SuppressWarnings("rawtypes") RedisTemplate redisTemplate) {  
45.         return new RedisCacheManager(redisTemplate);  
46.     }  
47.   
48.     @Bean  
49.     public RedisTemplate<String, String> redisTemplate(  
50.             RedisConnectionFactory factory) {  
51.         StringRedisTemplate template = new StringRedisTemplate(factory);  
52.         Jackson2JsonRedisSerializer jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer(Object.class);  
53.         ObjectMapper om = new ObjectMapper();  
54.         om.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);  
55.         om.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL);  
56.         jackson2JsonRedisSerializer.setObjectMapper(om);  
57.         template.setValueSerializer(jackson2JsonRedisSerializer);  
58.         template.afterPropertiesSet();  
59.         return template;  
60.     }  
61. }  

package com.wisely.ij.config;

import com.fasterxml.jackson.annotation.JsonAutoDetect;
import com.fasterxml.jackson.annotation.PropertyAccessor;
import com.fasterxml.jackson.databind.ObjectMapper;
import org.springframework.cache.CacheManager;
import org.springframework.cache.annotation.CachingConfigurerSupport;
import org.springframework.cache.annotation.EnableCaching;
import org.springframework.cache.interceptor.KeyGenerator;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.cache.RedisCacheManager;
import org.springframework.data.redis.connection.RedisConnectionFactory;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.data.redis.serializer.Jackson2JsonRedisSerializer;

import java.lang.reflect.Method;


@Configuration
@EnableCaching
public class RedisConfig extends CachingConfigurerSupport{

    @Bean
    public KeyGenerator wiselyKeyGenerator(){
        return new KeyGenerator() {
            @Override
            public Object generate(Object target, Method method, Object... params) {
                StringBuilder sb = new StringBuilder();
                sb.append(target.getClass().getName());
                sb.append(method.getName());
                for (Object obj : params) {
                    sb.append(obj.toString());
                }
                return sb.toString();
            }
        };

    }

    @Bean
    public CacheManager cacheManager(
            @SuppressWarnings("rawtypes") RedisTemplate redisTemplate) {
        return new RedisCacheManager(redisTemplate);
    }

    @Bean
    public RedisTemplate<String, String> redisTemplate(
            RedisConnectionFactory factory) {
        StringRedisTemplate template = new StringRedisTemplate(factory);
        Jackson2JsonRedisSerializer jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer(Object.class);
        ObjectMapper om = new ObjectMapper();
        om.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);
        om.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL);
        jackson2JsonRedisSerializer.setObjectMapper(om);
        template.setValueSerializer(jackson2JsonRedisSerializer);
        template.afterPropertiesSet();
        return template;
    }
}

 

 

3 redis服务器配置

Properties代码  

1. # REDIS (RedisProperties)  
2. spring.redis.database= # database name  
3. spring.redis.host=localhost # server host  
4. spring.redis.password= # server password  
5. spring.redis.port=6379 # connection port  
6. spring.redis.pool.max-idle=8 # pool settings ...  
7. spring.redis.pool.min-idle=0  
8. spring.redis.pool.max-active=8  
9. spring.redis.pool.max-wait=-1  
10. spring.redis.sentinel.master= # name of Redis server  
11. spring.redis.sentinel.nodes= # comma-separated list of host:port pairs  

# REDIS (RedisProperties)
spring.redis.database= # database name
spring.redis.host=localhost # server host
spring.redis.password= # server password
spring.redis.port=6379 # connection port
spring.redis.pool.max-idle=8 # pool settings ...
spring.redis.pool.min-idle=0
spring.redis.pool.max-active=8
spring.redis.pool.max-wait=-1
spring.redis.sentinel.master= # name of Redis server
spring.redis.sentinel.nodes= # comma-separated list of host:port pairs

 

4 应用

测试两个实体类

Java代码  

1. package com.wisely.ij.domain;  
2.   
3.   
4. public class Address {  
5.     private Long id;  
6.     private String province;  
7.     private String city;  
8.   
9.     public Address(Long id,String province, String city) {  
10.         this.id = id;  
11.         this.province = province;  
12.         this.city = city;  
13.     }  
14.   
15.     public Address() {  
16.     }  
17.   
18.     public Long getId() {  
19.         return id;  
20.     }  
21.   
22.     public void setId(Long id) {  
23.         this.id = id;  
24.     }  
25.   
26.     public String getProvince() {  
27.         return province;  
28.     }  
29.   
30.     public void setProvince(String province) {  
31.         this.province = province;  
32.     }  
33.   
34.     public String getCity() {  
35.         return city;  
36.     }  
37.   
38.     public void setCity(String city) {  
39.         this.city = city;  
40.     }  
41. }  

package com.wisely.ij.domain;


public class Address {
    private Long id;
    private String province;
    private String city;

    public Address(Long id,String province, String city) {
        this.id = id;
        this.province = province;
        this.city = city;
    }

    public Address() {
    }

    public Long getId() {
        return id;
    }

    public void setId(Long id) {
        this.id = id;
    }

    public String getProvince() {
        return province;
    }

    public void setProvince(String province) {
        this.province = province;
    }

    public String getCity() {
        return city;
    }

    public void setCity(String city) {
        this.city = city;
    }
}

 

Java代码  

1. package com.wisely.ij.domain;  
2.   
3.   
4. public class User {  
5.     private Long id;  
6.     private String firstName;  
7.     private String lastName;  
8.   
9.     public User(Long id,String firstName, String lastName) {  
10.         this.id = id ;  
11.         this.firstName = firstName;  
12.         this.lastName = lastName;  
13.     }  
14.   
15.     public User() {  
16.     }  
17.   
18.     public Long getId() {  
19.         return id;  
20.     }  
21.   
22.     public void setId(Long id) {  
23.         this.id = id;  
24.     }  
25.   
26.     public String getFirstName() {  
27.         return firstName;  
28.     }  
29.   
30.     public void setFirstName(String firstName) {  
31.         this.firstName = firstName;  
32.     }  
33.   
34.     public String getLastName() {  
35.         return lastName;  
36.     }  
37.   
38.     public void setLastName(String lastName) {  
39.         this.lastName = lastName;  
40.     }  
41. }  

package com.wisely.ij.domain;


public class User {
    private Long id;
    private String firstName;
    private String lastName;

    public User(Long id,String firstName, String lastName) {
        this.id = id ;
        this.firstName = firstName;
        this.lastName = lastName;
    }

    public User() {
    }

    public Long getId() {
        return id;
    }

    public void setId(Long id) {
        this.id = id;
    }

    public String getFirstName() {
        return firstName;
    }

    public void setFirstName(String firstName) {
        this.firstName = firstName;
    }

    public String getLastName() {
        return lastName;
    }

    public void setLastName(String lastName) {
        this.lastName = lastName;
    }
}

 

 使用演示

Java代码  

1. package com.wisely.ij.service;  
2.   
3. import com.wisely.ij.domain.Address;  
4. import com.wisely.ij.domain.User;  
5. import org.springframework.cache.annotation.Cacheable;  
6. import org.springframework.stereotype.Service;  
7.   
8. /** 
9.  * Created by wisely on 2015/5/25. 
10.  */  
11. @Service  
12. public class DemoService {  
13.     @Cacheable(value = "usercache",keyGenerator = "wiselyKeyGenerator")  
14.     public User findUser(Long id,String firstName,String lastName){  
15.         System.out.println("无缓存的时候调用这里");  
16.         return new User(id,firstName,lastName);  
17.     }  
18.     @Cacheable(value = "addresscache",keyGenerator = "wiselyKeyGenerator")  
19.     public Address findAddress(Long id,String province,String city){  
20.         System.out.println("无缓存的时候调用这里");  
21.         return new Address(id,province,city);  
22.     }  
23. }  

package com.wisely.ij.service;

import com.wisely.ij.domain.Address;
import com.wisely.ij.domain.User;
import org.springframework.cache.annotation.Cacheable;
import org.springframework.stereotype.Service;

/**
 * Created by wisely on 2015/5/25.
 */
@Service
public class DemoService {
    @Cacheable(value = "usercache",keyGenerator = "wiselyKeyGenerator")
    public User findUser(Long id,String firstName,String lastName){
        System.out.println("无缓存的时候调用这里");
        return new User(id,firstName,lastName);
    }
    @Cacheable(value = "addresscache",keyGenerator = "wiselyKeyGenerator")
    public Address findAddress(Long id,String province,String city){
        System.out.println("无缓存的时候调用这里");
        return new Address(id,province,city);
    }
}

 

Java代码  

1. package com.wisely.ij.web;  
2.   
3. import com.wisely.ij.domain.Address;  
4. import com.wisely.ij.domain.User;  
5. import com.wisely.ij.service.DemoService;  
6. import org.springframework.beans.factory.annotation.Autowired;  
7. import org.springframework.stereotype.Controller;  
8. import org.springframework.web.bind.annotation.RequestMapping;  
9. import org.springframework.web.bind.annotation.ResponseBody;  
10.   
11. /** 
12.  * Created by wisely on 2015/5/25. 
13.  */  
14.   
15. @Controller  
16. public class DemoController {  
17.   
18.     @Autowired  
19.     DemoService demoService;  
20.   
21.     @RequestMapping("/test")  
22.     @ResponseBody  
23.     public String putCache(){  
24.         demoService.findUser(1l,"wang","yunfei");  
25.         demoService.findAddress(1l,"anhui","hefei");  
26.         System.out.println("若下面没出现“无缓存的时候调用”字样且能打印出数据表示测试成功");  
27.         return "ok";  
28.     }  
29.     @RequestMapping("/test2")  
30.     @ResponseBody  
31.     public String testCache(){  
32.         User user = demoService.findUser(1l,"wang","yunfei");  
33.         Address address =demoService.findAddress(1l,"anhui","hefei");  
34.         System.out.println("我这里没执行查询");  
35.         System.out.println("user:"+"/"+user.getFirstName()+"/"+user.getLastName());  
36.         System.out.println("address:"+"/"+address.getProvince()+"/"+address.getCity());  
37.         return "ok";  
38.     }  
39. }  

package com.wisely.ij.web;

import com.wisely.ij.domain.Address;
import com.wisely.ij.domain.User;
import com.wisely.ij.service.DemoService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

/**
 * Created by wisely on 2015/5/25.
 */

@Controller
public class DemoController {

    @Autowired
    DemoService demoService;

    @RequestMapping("/test")
    @ResponseBody
    public String putCache(){
        demoService.findUser(1l,"wang","yunfei");
        demoService.findAddress(1l,"anhui","hefei");
        System.out.println("若下面没出现“无缓存的时候调用”字样且能打印出数据表示测试成功");
        return "ok";
    }
    @RequestMapping("/test2")
    @ResponseBody
    public String testCache(){
        User user = demoService.findUser(1l,"wang","yunfei");
        Address address =demoService.findAddress(1l,"anhui","hefei");
        System.out.println("我这里没执行查询");
        System.out.println("user:"+"/"+user.getFirstName()+"/"+user.getLastName());
        System.out.println("address:"+"/"+address.getProvince()+"/"+address.getCity());
        return "ok";
    }
}

 

5 检验

 

先访问http://localhost:8080/test 保存缓存

 

再访问http://localhost:8080/test2 调用缓存里的数据; 更多详细了解：https://niyao88.taobao.com/