Java常用工具类(自用)

统一响应格式

Response类

@JsonInclude(JsonInclude.Include.NON_NULL)
public class Response implements Serializable {

  private Integer code;

  private String msg;

  private T data;

  public Response() {
    this.code = AppHttpCodeEnum.SUCCESS.getCode();
    this.msg = AppHttpCodeEnum.SUCCESS.getMsg();
  }

  public Response(Integer code, T data) {
    this.code = code;
    this.data = data;
  }

  public Response(Integer code, String msg, T data) {
    this.code = code;
    this.msg = msg;
    this.data = data;
  }

  public Response(Integer code, String msg) {
    this.code = code;
    this.msg = msg;
  }

  public static Response errorResult(int code, String msg) {
    Response result = new Response();
    return result.error(code, msg);
  }

  public static Response okResult() {
    Response result = new Response();
    return result;
  }

  public static Response okResult(int code, String msg) {
    Response result = new Response();
    return result.ok(code, null, msg);
  }

  public static Response okResult(Object data) {
    Response result = setAppHttpCodeEnum(AppHttpCodeEnum.SUCCESS, AppHttpCodeEnum.SUCCESS.getMsg());
    if (data != null) {
      result.setData(data);
    }
    return result;
  }

  public static Response errorResult(AppHttpCodeEnum enums) {
    return setAppHttpCodeEnum(enums, enums.getMsg());
  }

  public static Response errorResult(AppHttpCodeEnum enums, String msg) {
    return setAppHttpCodeEnum(enums, msg);
  }

  public static Response setAppHttpCodeEnum(AppHttpCodeEnum enums) {
    return okResult(enums.getCode(), enums.getMsg());
  }

  private static Response setAppHttpCodeEnum(AppHttpCodeEnum enums, String msg) {
    return okResult(enums.getCode(), msg);
  }

  public Response error(Integer code, String msg) {
    this.code = code;
    this.msg = msg;
    return this;
  }

  public Response ok(Integer code, T data) {
    this.code = code;
    this.data = data;
    return this;
  }

  public Response ok(Integer code, T data, String msg) {
    this.code = code;
    this.data = data;
    this.msg = msg;
    return this;
  }

  public Response ok(T data) {
    this.data = data;
    return this;
  }

  public Integer getCode() {
    return code;
  }

  public void setCode(Integer code) {
    this.code = code;
  }

  public String getMsg() {
    return msg;
  }

  public void setMsg(String msg) {
    this.msg = msg;
  }

  public T getData() {
    return data;
  }

  public void setData(T data) {
    this.data = data;
  }

}

AppHttpCodeEnum枚举

public enum AppHttpCodeEnum {
  SUCCESS(200, "操作成功"), NEED_LOGIN(401, "需要登录后操作"), NO_OPERATOR_AUTH(403, "无权限操作"), SYSTEM_ERROR(500,
    "出现错误"), USERNAME_EXIST(501, "用户名已存在"), PHONENUMBER_EXIST(502,
      "手机号已存在"), EMAIL_EXIST(503, "邮箱已存在"), REQUIRE_USERNAME(504, "必需填写用户名"), LOGIN_ERROR(505, "用户名或密码错误");

  int code;

  String msg;

  AppHttpCodeEnum(int code, String errorMessage) {
    this.code = code;
    this.msg = errorMessage;
  }

  public int getCode() {
    return code;
  }

  public String getMsg() {
    return msg;
  }
}

Bean拷贝工具类

public class BeanCopyUtils {

  private BeanCopyUtils() {
  }

  public static  T copyBean(Object source, Class tClass) {
    T result = null;
    try {
      result = tClass.newInstance();
      BeanUtils.copyProperties(source, result);
    } catch (Exception e) {
      e.printStackTrace();
    }
    return result;
  }

  public static  List copyBeanList(List list, Class tClass) {
    return list.stream().map(o -> copyBean(o, tClass)).collect(Collectors.toList());
  }
}

跨域配置&&fastjson配置

@Configuration
public class WebConfig implements WebMvcConfigurer {

  @Override
  public void addCorsMappings(CorsRegistry registry) {
    // 设置允许跨域的路径
    registry.addMapping("/**")
      // 设置允许跨域请求的域名
      .allowedOriginPatterns("*")
      // 是否允许cookie
      .allowCredentials(true)
      // 设置允许的请求方式
      .allowedMethods("GET", "POST", "DELETE", "PUT")
      // 设置允许的header属性
      .allowedHeaders("*")
      // 跨域允许时间
      .maxAge(3600);
  }

  @Bean
  public HttpMessageConverter fastJsonHttpMessageConverters() {
    FastJsonHttpMessageConverter fastConverter = new FastJsonHttpMessageConverter();
    FastJsonConfig fastJsonConfig = new FastJsonConfig();
    fastJsonConfig.setSerializerFeatures(SerializerFeature.PrettyFormat);
    fastJsonConfig.setDateFormat("yyyy-MM-dd HH:mm:ss");

    SerializeConfig.globalInstance.put(Long.class, ToStringSerializer.instance);

    fastJsonConfig.setSerializeConfig(SerializeConfig.globalInstance);
    fastConverter.setFastJsonConfig(fastJsonConfig);
    HttpMessageConverter converter = fastConverter;
    return converter;
  }

  @Override
  public void configureMessageConverters(List> converters) {
    converters.add(fastJsonHttpMessageConverters());
  }
}

redis

redis配置类

@Configuration
public class RedisConfig {

  @Bean
  RedisTemplate redisTemplate(RedisConnectionFactory redisConnectionFactory) {

    RedisTemplate redisTemplate = new RedisTemplate();
    redisTemplate.setConnectionFactory(redisConnectionFactory);

    Jackson2JsonRedisSerializer jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer(Object.class);
    jackson2JsonRedisSerializer.setObjectMapper(new ObjectMapper());

    redisTemplate.setKeySerializer(new StringRedisSerializer());
    redisTemplate.setValueSerializer(jackson2JsonRedisSerializer);

    redisTemplate.setHashKeySerializer(new StringRedisSerializer());
    redisTemplate.setHashValueSerializer(jackson2JsonRedisSerializer);

    return redisTemplate;

  }

}

redisUtil

@Component
public class RedisUtil {

  @Autowired
  private RedisTemplate redisTemplate;

  /**
   * 指定缓存失效时间
   *
   * @param key  键
   * @param time 时间(秒)
   * @return
   */
  public boolean expire(String key, long time) {
    try {
      if (time > 0) {
        redisTemplate.expire(key, time, TimeUnit.SECONDS);
      }
      return true;
    } catch (Exception e) {
      e.printStackTrace();
      return false;
    }
  }

  /**
   * 根据key 获取过期时间
   *
   * @param key 键 不能为null
   * @return 时间(秒) 返回0代表为永久有效
   */
  public long getExpire(String key) {
    return redisTemplate.getExpire(key, TimeUnit.SECONDS);
  }

  /**
   * 判断key是否存在
   *
   * @param key 键
   * @return true 存在 false不存在
   */
  public boolean hasKey(String key) {
    try {
      return redisTemplate.hasKey(key);
    } catch (Exception e) {
      e.printStackTrace();
      return false;
    }
  }

  /**
   * 删除缓存
   *
   * @param key 可以传一个值 或多个
   */
  @SuppressWarnings("unchecked")
  public void del(String... key) {
    if (key != null && key.length > 0) {
      if (key.length == 1) {
        redisTemplate.delete(key[0]);
      } else {
        redisTemplate.delete(CollectionUtils.arrayToList(key));
      }
    }
  }

  //============================String=============================

  /**
   * 普通缓存获取
   *
   * @param key 键
   * @return 值
   */
  public Object get(String key) {
    return key == null ? null : redisTemplate.opsForValue().get(key);
  }

  /**
   * 普通缓存放入
   *
   * @param key   键
   * @param value 值
   * @return true成功 false失败
   */
  public boolean set(String key, Object value) {
    try {
      redisTemplate.opsForValue().set(key, value);
      return true;
    } catch (Exception e) {
      e.printStackTrace();
      return false;
    }

  }

  /**
   * 普通缓存放入并设置时间
   *
   * @param key   键
   * @param value 值
   * @param time  时间(秒) time要大于0 如果time小于等于0 将设置无限期
   * @return true成功 false 失败
   */
  public boolean set(String key, Object value, long time) {
    try {
      if (time > 0) {
        redisTemplate.opsForValue().set(key, value, time, TimeUnit.SECONDS);
      } else {
        set(key, value);
      }
      return true;
    } catch (Exception e) {
      e.printStackTrace();
      return false;
    }
  }

  /**
   * 递增
   *
   * @param key 键
   * @param delta  要增加几(大于0)
   * @return
   */
  public long incr(String key, long delta) {
    if (delta < 0) {
      throw new RuntimeException("递增因子必须大于0");
    }
    return redisTemplate.opsForValue().increment(key, delta);
  }

  /**
   * 递减
   *
   * @param key 键
   * @param delta  要减少几(小于0)
   * @return
   */
  public long decr(String key, long delta) {
    if (delta < 0) {
      throw new RuntimeException("递减因子必须大于0");
    }
    return redisTemplate.opsForValue().increment(key, -delta);
  }

  //================================Map=================================

  /**
   * HashGet
   *
   * @param key  键 不能为null
   * @param item 项 不能为null
   * @return 值
   */
  public Object hget(String key, String item) {
    return redisTemplate.opsForHash().get(key, item);
  }

  /**
   * 获取hashKey对应的所有键值
   *
   * @param key 键
   * @return 对应的多个键值
   */
  public Map hmget(String key) {
    return redisTemplate.opsForHash().entries(key);
  }

  /**
   * HashSet
   *
   * @param key 键
   * @param map 对应多个键值
   * @return true 成功 false 失败
   */
  public boolean hmset(String key, Map map) {
    try {
      redisTemplate.opsForHash().putAll(key, map);
      return true;
    } catch (Exception e) {
      e.printStackTrace();
      return false;
    }
  }

  /**
   * HashSet 并设置时间
   *
   * @param key  键
   * @param map  对应多个键值
   * @param time 时间(秒)
   * @return true成功 false失败
   */
  public boolean hmset(String key, Map map, long time) {
    try {
      redisTemplate.opsForHash().putAll(key, map);
      if (time > 0) {
        expire(key, time);
      }
      return true;
    } catch (Exception e) {
      e.printStackTrace();
      return false;
    }
  }

  /**
   * 向一张hash表中放入数据,如果不存在将创建
   *
   * @param key   键
   * @param item  项
   * @param value 值
   * @return true 成功 false失败
   */
  public boolean hset(String key, String item, Object value) {
    try {
      redisTemplate.opsForHash().put(key, item, value);
      return true;
    } catch (Exception e) {
      e.printStackTrace();
      return false;
    }
  }

  /**
   * 向一张hash表中放入数据,如果不存在将创建
   *
   * @param key   键
   * @param item  项
   * @param value 值
   * @param time  时间(秒)  注意:如果已存在的hash表有时间,这里将会替换原有的时间
   * @return true 成功 false失败
   */
  public boolean hset(String key, String item, Object value, long time) {
    try {
      redisTemplate.opsForHash().put(key, item, value);
      if (time > 0) {
        expire(key, time);
      }
      return true;
    } catch (Exception e) {
      e.printStackTrace();
      return false;
    }
  }

  /**
   * 删除hash表中的值
   *
   * @param key  键 不能为null
   * @param item 项 可以使多个 不能为null
   */
  public void hdel(String key, Object... item) {
    redisTemplate.opsForHash().delete(key, item);
  }

  /**
   * 判断hash表中是否有该项的值
   *
   * @param key  键 不能为null
   * @param item 项 不能为null
   * @return true 存在 false不存在
   */
  public boolean hHasKey(String key, String item) {
    return redisTemplate.opsForHash().hasKey(key, item);
  }

  /**
   * hash递增 如果不存在,就会创建一个 并把新增后的值返回
   *
   * @param key  键
   * @param item 项
   * @param by   要增加几(大于0)
   * @return
   */
  public double hincr(String key, String item, double by) {
    return redisTemplate.opsForHash().increment(key, item, by);
  }

  /**
   * hash递减
   *
   * @param key  键
   * @param item 项
   * @param by   要减少记(小于0)
   * @return
   */
  public double hdecr(String key, String item, double by) {
    return redisTemplate.opsForHash().increment(key, item, -by);
  }

  //============================set=============================

  /**
   * 根据key获取Set中的所有值
   *
   * @param key 键
   * @return
   */
  public Set