Spring - 6 模板物件

3.1)Spring模組物件

• TransactionTemplate

• JdbcTemplate

• RedisTemplate

• RabbitTemplate

• JmsTemplate

• HibernateTemplate

• RestTemplate

3.2)JdbcTemplate（瞭解）

提供標準的sql語句操作API

public void save(Account account) {
    String sql = "insert into account(name,money)values(?,?)";
    jdbcTemplate.update(sql,account.getName(),account.getMoney());
}

 

3.3)NamedParameterJdbcTemplate(瞭解）

提供標準的具名sql語句操作API

public void save(Account account) {
    String sql = "insert into account(name,money)values(:name,:money)";
    Map pm = new HashMap();
    pm.put("name",account.getName());
    pm.put("money",account.getMoney());
    jdbcTemplate.update(sql,pm);
}

 

3.4)RedisTemplate

RedisTemplate物件結構

public void changeMoney(Integer id, Double money) {
    redisTemplate.opsForValue().set("account:id:"+id,money);
}
public Double findMondyById(Integer id) {
    Object money = redisTemplate.opsForValue().get("account:id:" + id);
    return new Double(money.toString());
}


// 配置類 RedisConfig
@PropertySource("redis.properties")
public class RedisConfig {

    @Value("${redis.host}")
    private String hostName;

    @Value("${redis.port}")
    private Integer port;

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

    @Value("${redis.maxActive}")
    private Integer maxActive;
    @Value("${redis.minIdle}")
    private Integer minIdle;
    @Value("${redis.maxIdle}")
    private Integer maxIdle;
    @Value("${redis.maxWait}")
    private Integer maxWait;



    @Bean
    //配置RedisTemplate
    public RedisTemplate createRedisTemplate(RedisConnectionFactory redisConnectionFactory){
        //1.建立物件
        RedisTemplate redisTemplate = new RedisTemplate();
        //2.設定連線工廠
        redisTemplate.setConnectionFactory(redisConnectionFactory);
        //3.設定redis生成的key的序列化器，對key編碼進行處理
        RedisSerializer stringSerializer = new StringRedisSerializer();
        redisTemplate.setKeySerializer(stringSerializer);
        redisTemplate.setHashKeySerializer(stringSerializer);
        //4.返回
        return redisTemplate;
    }

    @Bean
    //配置Redis連線工廠
    public RedisConnectionFactory createRedisConnectionFactory(RedisStandaloneConfiguration redisStandaloneConfiguration,GenericObjectPoolConfig genericObjectPoolConfig){
        //1.建立配置構建器，它是基於池的思想管理Jedis連線的
        JedisClientConfiguration.JedisPoolingClientConfigurationBuilder builder = (JedisClientConfiguration.JedisPoolingClientConfigurationBuilder)JedisClientConfiguration.builder();
        //2.設定池的配置資訊物件
        builder.poolConfig(genericObjectPoolConfig);
        //3.建立Jedis連線工廠
        JedisConnectionFactory jedisConnectionFactory = new JedisConnectionFactory(redisStandaloneConfiguration,builder.build());
        //4.返回
        return jedisConnectionFactory;
    }

    @Bean
    //配置spring提供的Redis連線池資訊
    public GenericObjectPoolConfig createGenericObjectPoolConfig(){
        //1.建立Jedis連線池的配置物件
        GenericObjectPoolConfig genericObjectPoolConfig = new GenericObjectPoolConfig();
        //2.設定連線池資訊
        genericObjectPoolConfig.setMaxTotal(maxActive);
        genericObjectPoolConfig.setMinIdle(minIdle);
        genericObjectPoolConfig.setMaxIdle(maxIdle);
        genericObjectPoolConfig.setMaxWaitMillis(maxWait);
        //3.返回
        return genericObjectPoolConfig;
    }


    @Bean
    //配置Redis標準連線配置物件
    public RedisStandaloneConfiguration createRedisStandaloneConfiguration(){
        //1.建立Redis伺服器配置資訊物件
        RedisStandaloneConfiguration redisStandaloneConfiguration = new RedisStandaloneConfiguration();
        //2.設定Redis伺服器地址，埠和密碼（如果有密碼的話）
        redisStandaloneConfiguration.setHostName(hostName);
        redisStandaloneConfiguration.setPort(port);
//        redisStandaloneConfiguration.setPassword(RedisPassword.of(password));
        //3.返回
        return redisStandaloneConfiguration;
    }

}


// AccountServiceImpl實現類
@Service("accountService")
public class AccountServiceImpl implements AccountService {

    @Autowired
    private RedisTemplate redisTemplate;

    public void save(Account account) {
    }

    public void changeMoney(Integer id, Double money) {
        //等同於redis中set account:id:1 100
        redisTemplate.opsForValue().set("account:id:"+id,money);
    }

    public Double findMondyById(Integer id) {
        //等同於redis中get account:id:1
        Object money = redisTemplate.opsForValue().get("account:id:" + id);
        return new Double(money.toString());
    }
}


// 測試類
public class App {
    public static void main(String[] args) {
        Jedis jedis = new Jedis("192.168.40.130",6378);
        jedis.set("name","itheima");
        jedis.close();
    }
}