SpringBoot2.X整合redis

一、配置文件

#reids配置
spring:
    redis:
        database: 0
        host: 10.1.10.89
        password:
        pool:
            max-active: 200
            max-idle: 10
            max-wait: -1
            min-idle: 0
        port: 6379
        timeout: 1000

二、配置类

package cn.com.aaaa.test.redis;

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.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.cache.RedisCacheConfiguration;
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.serializer.Jackson2JsonRedisSerializer;
import org.springframework.data.redis.serializer.RedisSerializationContext;
import org.springframework.data.redis.serializer.RedisSerializer;
import org.springframework.data.redis.serializer.StringRedisSerializer;

import java.time.Duration;

@Configuration
public class RedisConfig extends CachingConfigurerSupport {

  @Bean
  public RedisTemplate<String, Object> redisTemplate(RedisConnectionFactory factory) {

    RedisTemplate<String, Object> template = new RedisTemplate<>();

    RedisSerializer<String> redisSerializer = new StringRedisSerializer();

    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.setConnectionFactory(factory);
    //key序列化方式
    template.setKeySerializer(redisSerializer);
    //value序列化
    template.setValueSerializer(jackson2JsonRedisSerializer);
    //value hashmap序列化
    template.setHashValueSerializer(jackson2JsonRedisSerializer);

    return template;
  }

  @Bean
  public CacheManager cacheManager(RedisConnectionFactory factory) {
    RedisSerializer<String> redisSerializer = new StringRedisSerializer();
    Jackson2JsonRedisSerializer jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer(Object.class);

    //解决查询缓存转换异常的问题
    ObjectMapper om = new ObjectMapper();
    om.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);
    om.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL);
    jackson2JsonRedisSerializer.setObjectMapper(om);

    // 配置序列化（解决乱码的问题）,过期时间30秒
    RedisCacheConfiguration config = RedisCacheConfiguration.defaultCacheConfig()
        .entryTtl(Duration.ofSeconds(30))
        .serializeKeysWith(RedisSerializationContext.SerializationPair.fromSerializer(redisSerializer))
        .serializeValuesWith(RedisSerializationContext.SerializationPair.fromSerializer(jackson2JsonRedisSerializer))
        .disableCachingNullValues();

    RedisCacheManager cacheManager = RedisCacheManager.builder(factory)
        .cacheDefaults(config)
        .build();
    return cacheManager;
  }
}

三、service类

package cn.com.aaaa.test.service;

/**
 * @author LingXiu,  2019/11/4 18:14
 * @version  V1.0
 */
public interface RedisService {

  public void setInfo(String id,String ob);

  public String getInfo(String id);

  public Object getObject(String id);
}

四、实现类

package cn.com.aaaa.test.service.impl;
/**
 * @author baiyueguang,  2019/11/4 18:15
 */

import cn.com.acca.test.service.RedisService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Service;

/**
 * @author LingXiu
 * @date 2019/11/4 18:15
 */
@Service
public class RedisServiceImpl implements RedisService {
  @Autowired
  StringRedisTemplate stringRedisTemplate;

  @Autowired
  RedisTemplate redisTemplate;

  @Override
  public void setInfo(String id, String ob) {
    stringRedisTemplate.opsForValue().set(id,ob);
//    redisUtil.set(id,ob);
  }

  @Override
  public String getInfo(String id) {
    String s = stringRedisTemplate.opsForValue().get(id);
    return s;
  }

  @Override
  public Object getObject(String id) {
    Ticket ticket = (Ticket) redisTemplate.opsForValue().get(id);
    return ticket;
  }
}

五、Controller层

package cn.com.aaaa.test.controller;
/**
 * @version r V1.0
 * @author LingXiu,  2019/11/4 17:03
 */

import cn.com.aaaa.test.base.BaseController;
import cn.com.aaaa.test.dto.Ticket;
import cn.com.aaaa.test.service.RedisService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.web.bind.annotation.*;

import javax.servlet.http.HttpServletRequest;

/**
 * @author LingXiu
 * @date 2019/11/4 17:03
 */
@RestController
@RequestMapping("/redis")
public class RedisController extends BaseController {

  @Autowired
  private StringRedisTemplate stringRedisTemplate;

  @Autowired
  private RedisTemplate redisTemplate;

  @Autowired
  RedisService redisService;


  @GetMapping("/getString/{key}")
  public String getString(@PathVariable String key){
    System.out.println("这个值" + key);
    System.out.println("结果" + redisService.getInfo(key));
    String result =  redisService.getInfo(key);

    return result;
  }

  @PostMapping("/set/{key}/{value}")
  public Boolean set(@PathVariable("key") String key,
                      @PathVariable("value") String value,HttpServletRequest request){
    redisService.setInfo(key,value);

    return false;
  }

  @GetMapping("/getObject/{key}")
  public Ticket getObject(@PathVariable String key){
    Ticket ticket = (Ticket) redisService.getObject(key);
    return ticket;
  }


}

六、Postman测试

测试时，报了个错误。但是后来找不到。我怀疑是网络上粘贴别人代码时，可能引入的格式问题导致的。如果各位遇到了如下报错，其实是个空指针。应该是redisTemplate没有导入进来，或者说导入了一个空模板。请联系我。很高兴和大家交流。

2019-11-07 14:28:11.962 ERROR 174764 --- [nio-8088-exec-1] c.c.a.r.e.GlobalExceptionHandler         : 发生空指针异常！原因是:

java.lang.NullPointerException: null
    at cn.com.acca.ramsibe.controller.RedisController.set(RedisController.java:43) ~[classes/:na]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_111]
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_111]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_111]
    at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_111]
    at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:189) ~[spring-web-5.1.6.RELEASE.jar:5.1.6.RELEASE]
    at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:138) ~[spring-web-5.1.6.RELEASE.jar:5.1.6.RELEASE]
    at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:102) ~[spring-webmvc-5.1.6.RELEASE.jar:5.1.6.RELEASE]
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:892) ~[spring-webmvc-5.1.6.RELEASE.jar:5.1.6.RELEASE]
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:797) ~[spring-webmvc-5.1.6.RELEASE.jar:5.1.6.RELEASE]
    at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87) ~[spring-webmvc-5.1.6.RELEASE.jar:5.1.6.RELEASE]
    at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1038) ~[spring-webmvc-5.1.6.RELEASE.jar:5.1.6.RELEASE]
    at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:942) ~[spring-webmvc-5.1.6.RELEASE.jar:5.1.6.RELEASE]
    at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1005) [spring-webmvc-5.1.6.RELEASE.jar:5.1.6.RELEASE]
    at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:908) [spring-webmvc-5.1.6.RELEASE.jar:5.1.6.RELEASE]
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:660) [tomcat-embed-core-9.0.17.jar:9.0.17]
    at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:882) [spring-webmvc-5.1.6.RELEASE.jar:5.1.6.RELEASE]
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:741) [tomcat-embed-core-9.0.17.jar:9.0.17]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) [tomcat-embed-core-9.0.17.jar:9.0.17]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-9.0.17.jar:9.0.17]
    at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) [tomcat-embed-websocket-9.0.17.jar:9.0.17]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [tomcat-embed-core-9.0.17.jar:9.0.17]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-9.0.17.jar:9.0.17]