java配置SSM框架下的redis缓存

pom.xml引入依赖包

<!--jedis.jar -->
  <dependency>
    <groupId>redis.clients</groupId>
    <artifactId>jedis</artifactId>
    <version>2.9.0</version>
  </dependency>

  <!-- Spring下使用Redis -->
  <dependency>
    <groupId>org.springframework.data</groupId>
    <artifactId>spring-data-redis</artifactId>
    <version>2.1.3.RELEASE</version>
  </dependency>

其余的依赖包就不贴出来了

java配置目录结构

WebAppInitializer.java

/*
 * Spring Mvc的配置
 *createDate: 2018年12月21日
 * author: dz
 * */
public class WebAppInitializer extends AbstractAnnotationConfigDispatcherServletInitializer {
    private final static Logger LOG = Logger.getLogger(String.valueOf(WebAppInitializer.class));

    @Override
    protected Class<?>[] getRootConfigClasses() {
        LOG.info("root配置类初始化");
        return new Class<?>[]{RootConfig.class};
    }

    @Override
    protected Class<?>[] getServletConfigClasses() {
        LOG.info("------web配置类初始化------");
        return new Class<?>[]{WebConfig.class};
    }

    @Override
    protected String[] getServletMappings() {
        LOG.info("------映射根路径初始化------");
        return new String[]{"/"};//请求路径映射，根路径
    }

    @Override
    protected Filter[] getServletFilters() {
        LOG.info("-----编码过滤配置-------");
        CharacterEncodingFilter encodingFilter = new CharacterEncodingFilter("UTF-8");
        return new Filter[]{encodingFilter};
    }
}

RootConfig.java

/**
 * <p>Title: RootConfig.java</p>
 * <p>Description: 配置类，用于管理ContextLoadListener创建的上下文的bean</p>
 * <p>CreateDate: 2018年12月20日</p>
 *
 * @author dz
 */
@Configuration
@ComponentScan(basePackages = {"com.dznfit.service"})
@PropertySource("classpath:jdbc.properties")
@PropertySource("classpath:redis.properties")
@Import({MybatisConfig.class, ShiroConfig.class, RedisConfig.class})
public class RootConfig {

    @Bean
    public static PropertySourcesPlaceholderConfigurer sourcesPlaceholderConfigurer() {
        return new PropertySourcesPlaceholderConfigurer();
    }

}

WebConfig.java

/**
 * <p>Title: WebConfig.java</p>
 * <p>Description: 配置类，用于定义DispatcherServlet上下文的bean</p>
 * <p>CreateDate: 2018年12月20日</p>
 *
 * @author dz
 */
@Configuration
@EnableWebMvc
@EnableAspectJAutoProxy
@ComponentScan(basePackages = "com.dznfit.controller")
@ComponentScan(basePackages = "com.dznfit.cache")
public class WebConfig implements WebMvcConfigurer {

    @Override
    public void configureViewResolvers(ViewResolverRegistry registry) {
        registry.jsp("/WEB-INF/view/", ".jsp");
    }

    @Bean
    public CustomExceptionResolver getExceptionResolver(){
        return new CustomExceptionResolver();
    }

}

MybatisConfig.java

/**
 * <p>Title: DruidDataSourceConfig.java</p>
 * <p>Description: 数据源属性配置</p>
 * <p>CreateDate: 2018年12月20日</p>
 *
 * @author dz
 */
@Configuration
@MapperScan(basePackages = "com.dznfit.dao")
@EnableTransactionManagement
public class MybatisConfig {

    @Value("${driver}")
    private String driver;

    @Value("${url}")
    private String url;

    @Value("${name}")
    private String user;

    @Value("${password}")
    private String password;

    @Autowired
    private Environment environment;

    @Bean("dataSource")
    public DataSource dataSourceConfig() throws PropertyVetoException {
        // 使用c3p0
        ComboPooledDataSource source = new ComboPooledDataSource();
        source.setDriverClass(driver);
        source.setJdbcUrl(url);
        source.setUser(user);
        source.setPassword(password);
        return source;
    }

    @Bean("sqlSessionFactoryBean")
    public SqlSessionFactoryBean sqlSessionFactoryBeanConfig() throws PropertyVetoException, IOException {
        SqlSessionFactoryBean factoryBean = new SqlSessionFactoryBean();
        factoryBean.setDataSource(this.dataSourceConfig());
        factoryBean.setTypeAliasesPackage("com.dznfit.entity");
        factoryBean.setConfigLocation(new ClassPathResource("mybatis-config.xml"));
        PathMatchingResourcePatternResolver resolver = new PathMatchingResourcePatternResolver();

        factoryBean.setMapperLocations(resolver.getResources("Mapper/*.xml"));
        return factoryBean;
    }
    /* <!-- 事务管理器 对mybatis操作数据库事务控制，spring使用jdbc的事务控制类 -->*/
    @Bean("transactionManager")
    public DataSourceTransactionManager dataSourceTransactionManagerConfig() throws PropertyVetoException {
        DataSourceTransactionManager manager = new DataSourceTransactionManager();
        manager.setDataSource(this.dataSourceConfig());
        return manager;
    }

}

RedisConfig.java

注意必须是java1.8以上才可以编译通过

@Configuration
@EnableCaching
public class RedisConfig {

    @Bean
    RedisConnectionFactory redisFactory() {
        RedisStandaloneConfiguration config = new RedisStandaloneConfiguration();
        return new JedisConnectionFactory(config);
    }

    @Bean
    RedisTemplate redisTemplate() {
        StringRedisTemplate template = new StringRedisTemplate(redisFactory());
        template.setValueSerializer(RedisSerializer.json());
        return template;
    }

    @Bean
    RedisCacheManager cacheManager() {
        RedisCacheConfiguration with = RedisCacheConfiguration
                .defaultCacheConfig()
                .computePrefixWith(cacheName -> "dz147." + cacheName)
                .serializeKeysWith(RedisSerializationContext.SerializationPair.
                        fromSerializer(RedisSerializer.string()))
                .serializeValuesWith(RedisSerializationContext.SerializationPair.
                        fromSerializer(RedisSerializer.json()));
        return RedisCacheManager.builder(redisFactory()).cacheDefaults(with).build();
    }
}

使用就非常简单了

Controller部分

@GetMapping(value = "/redis/{id}")
    //@GetCache(name="news",value="id")
    public @ResponseBody News redisTest(@PathVariable("id")int id) {
        return newsService.getNewsById(id);
    }

Service部分

我们只需要加上@Cacheable注解即可

@Service
public class NewsServiceImpl {
    @Autowired
    NewsMapper newsMapper;

    @Cacheable("news")
    public News getNewsById(int id) {
        return newsMapper.selectByPrimaryKey(id);
    }
}

Test部分

@RunWith(SpringRunner.class)
@ContextConfiguration(classes = RootConfig.class)
public class NewsServiceImplTest {
    @Autowired
    NewsServiceImpl newsService;

    @Test
    public void getNewsById() {
        newsService.getNewsById(2);
    }
}