SpringBoot中配置nacos
在SpringBoot中使用nacos一定要注意name
,使用openfeign
特别要注意这个点。
spring:
application:
name: item-service
需要的依赖包
- config需要引入的包
<dependency>
<groupId>com.alibaba.cloud</groupId>
<artifactId>spring-cloud-starter-alibaba-nacos-config</artifactId>
</dependency>
- discovery需要引入的包
<dependency>
<groupId>com.alibaba.cloud</groupId>
<artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
</dependency>
- bootstrap需要引入的包
<!--加载bootstrap-->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-bootstrap</artifactId>
</dependency>
- 配置openfeign需要引入的包
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-openfeign</artifactId>
</dependency>
- openfeign负载均衡
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-loadbalancer</artifactId>
</dependency>
- openfeign连接池
<dependency>
<groupId>io.github.openfeign</groupId>
<artifactId>feign-okhttp</artifactId>
</dependency>
安装nacos
创建nacos数据库
-- --------------------------------------------------------
-- 主机: 192.168.150.101
-- 服务器版本: 8.0.27 - MySQL Community Server - GPL
-- 服务器操作系统: Linux
-- HeidiSQL 版本: 12.2.0.6576
-- --------------------------------------------------------
/*!40101 SET @OLD_CHARACTER_SET_CLIENT=@@CHARACTER_SET_CLIENT */;
/*!40101 SET NAMES utf8 */;
/*!50503 SET NAMES utf8mb4 */;
/*!40103 SET @OLD_TIME_ZONE=@@TIME_ZONE */;
/*!40103 SET TIME_ZONE='+00:00' */;
/*!40014 SET @OLD_FOREIGN_KEY_CHECKS=@@FOREIGN_KEY_CHECKS, FOREIGN_KEY_CHECKS=0 */;
/*!40101 SET @OLD_SQL_MODE=@@SQL_MODE, SQL_MODE='NO_AUTO_VALUE_ON_ZERO' */;
/*!40111 SET @OLD_SQL_NOTES=@@SQL_NOTES, SQL_NOTES=0 */;
-- 导出 nacos 的数据库结构
DROP DATABASE IF EXISTS `nacos`;
CREATE DATABASE IF NOT EXISTS `nacos` /*!40100 DEFAULT CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci */ /*!80016 DEFAULT ENCRYPTION='N' */;
USE `nacos`;
-- 导出 表 nacos.config_info 结构
DROP TABLE IF EXISTS `config_info`;
CREATE TABLE IF NOT EXISTS `config_info` (
`id` bigint NOT NULL AUTO_INCREMENT COMMENT 'id',
`data_id` varchar(255) COLLATE utf8_bin NOT NULL COMMENT 'data_id',
`group_id` varchar(128) COLLATE utf8_bin DEFAULT NULL,
`content` longtext COLLATE utf8_bin NOT NULL COMMENT 'content',
`md5` varchar(32) COLLATE utf8_bin DEFAULT NULL COMMENT 'md5',
`gmt_create` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP COMMENT '创建时间',
`gmt_modified` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP COMMENT '修改时间',
`src_user` text COLLATE utf8_bin COMMENT 'source user',
`src_ip` varchar(50) COLLATE utf8_bin DEFAULT NULL COMMENT 'source ip',
`app_name` varchar(128) COLLATE utf8_bin DEFAULT NULL,
`tenant_id` varchar(128) COLLATE utf8_bin DEFAULT '' COMMENT '租户字段',
`c_desc` varchar(256) COLLATE utf8_bin DEFAULT NULL,
`c_use` varchar(64) COLLATE utf8_bin DEFAULT NULL,
`effect` varchar(64) COLLATE utf8_bin DEFAULT NULL,
`type` varchar(64) COLLATE utf8_bin DEFAULT NULL,
`c_schema` text COLLATE utf8_bin,
`encrypted_data_key` text COLLATE utf8_bin NOT NULL COMMENT '秘钥',
PRIMARY KEY (`id`),
UNIQUE KEY `uk_configinfo_datagrouptenant` (`data_id`,`group_id`,`tenant_id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb3 COLLATE=utf8_bin COMMENT='config_info';
-- 正在导出表 nacos.config_info 的数据:~0 rows (大约)
DELETE FROM `config_info`;
-- 导出 表 nacos.config_info_aggr 结构
DROP TABLE IF EXISTS `config_info_aggr`;
CREATE TABLE IF NOT EXISTS `config_info_aggr` (
`id` bigint NOT NULL AUTO_INCREMENT COMMENT 'id',
`data_id` varchar(255) COLLATE utf8_bin NOT NULL COMMENT 'data_id',
`group_id` varchar(128) COLLATE utf8_bin NOT NULL COMMENT 'group_id',
`datum_id` varchar(255) COLLATE utf8_bin NOT NULL COMMENT 'datum_id',
`content` longtext COLLATE utf8_bin NOT NULL COMMENT '内容',
`gmt_modified` datetime NOT NULL COMMENT '修改时间',
`app_name` varchar(128) COLLATE utf8_bin DEFAULT NULL,
`tenant_id` varchar(128) COLLATE utf8_bin DEFAULT '' COMMENT '租户字段',
PRIMARY KEY (`id`),
UNIQUE KEY `uk_configinfoaggr_datagrouptenantdatum` (`data_id`,`group_id`,`tenant_id`,`datum_id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb3 COLLATE=utf8_bin COMMENT='增加租户字段';
-- 正在导出表 nacos.config_info_aggr 的数据:~0 rows (大约)
DELETE FROM `config_info_aggr`;
-- 导出 表 nacos.config_info_beta 结构
DROP TABLE IF EXISTS `config_info_beta`;
CREATE TABLE IF NOT EXISTS `config_info_beta` (
`id` bigint NOT NULL AUTO_INCREMENT COMMENT 'id',
`data_id` varchar(255) COLLATE utf8_bin NOT NULL COMMENT 'data_id',
`group_id` varchar(128) COLLATE utf8_bin NOT NULL COMMENT 'group_id',
`app_name` varchar(128) COLLATE utf8_bin DEFAULT NULL COMMENT 'app_name',
`content` longtext COLLATE utf8_bin NOT NULL COMMENT 'content',
`beta_ips` varchar(1024) COLLATE utf8_bin DEFAULT NULL COMMENT 'betaIps',
`md5` varchar(32) COLLATE utf8_bin DEFAULT NULL COMMENT 'md5',
`gmt_create` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP COMMENT '创建时间',
`gmt_modified` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP COMMENT '修改时间',
`src_user` text COLLATE utf8_bin COMMENT 'source user',
`src_ip` varchar(50) COLLATE utf8_bin DEFAULT NULL COMMENT 'source ip',
`tenant_id` varchar(128) COLLATE utf8_bin DEFAULT '' COMMENT '租户字段',
`encrypted_data_key` text COLLATE utf8_bin NOT NULL COMMENT '秘钥',
PRIMARY KEY (`id`),
UNIQUE KEY `uk_configinfobeta_datagrouptenant` (`data_id`,`group_id`,`tenant_id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb3 COLLATE=utf8_bin COMMENT='config_info_beta';
-- 正在导出表 nacos.config_info_beta 的数据:~0 rows (大约)
DELETE FROM `config_info_beta`;
-- 导出 表 nacos.config_info_tag 结构
DROP TABLE IF EXISTS `config_info_tag`;
CREATE TABLE IF NOT EXISTS `config_info_tag` (
`id` bigint NOT NULL AUTO_INCREMENT COMMENT 'id',
`data_id` varchar(255) COLLATE utf8_bin NOT NULL COMMENT 'data_id',
`group_id` varchar(128) COLLATE utf8_bin NOT NULL COMMENT 'group_id',
`tenant_id` varchar(128) COLLATE utf8_bin DEFAULT '' COMMENT 'tenant_id',
`tag_id` varchar(128) COLLATE utf8_bin NOT NULL COMMENT 'tag_id',
`app_name` varchar(128) COLLATE utf8_bin DEFAULT NULL COMMENT 'app_name',
`content` longtext COLLATE utf8_bin NOT NULL COMMENT 'content',
`md5` varchar(32) COLLATE utf8_bin DEFAULT NULL COMMENT 'md5',
`gmt_create` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP COMMENT '创建时间',
`gmt_modified` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP COMMENT '修改时间',
`src_user` text COLLATE utf8_bin COMMENT 'source user',
`src_ip` varchar(50) COLLATE utf8_bin DEFAULT NULL COMMENT 'source ip',
PRIMARY KEY (`id`),
UNIQUE KEY `uk_configinfotag_datagrouptenanttag` (`data_id`,`group_id`,`tenant_id`,`tag_id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb3 COLLATE=utf8_bin COMMENT='config_info_tag';
-- 正在导出表 nacos.config_info_tag 的数据:~0 rows (大约)
DELETE FROM `config_info_tag`;
-- 导出 表 nacos.config_tags_relation 结构
DROP TABLE IF EXISTS `config_tags_relation`;
CREATE TABLE IF NOT EXISTS `config_tags_relation` (
`id` bigint NOT NULL COMMENT 'id',
`tag_name` varchar(128) COLLATE utf8_bin NOT NULL COMMENT 'tag_name',
`tag_type` varchar(64) COLLATE utf8_bin DEFAULT NULL COMMENT 'tag_type',
`data_id` varchar(255) COLLATE utf8_bin NOT NULL COMMENT 'data_id',
`group_id` varchar(128) COLLATE utf8_bin NOT NULL COMMENT 'group_id',
`tenant_id` varchar(128) COLLATE utf8_bin DEFAULT '' COMMENT 'tenant_id',
`nid` bigint NOT NULL AUTO_INCREMENT,
PRIMARY KEY (`nid`),
UNIQUE KEY `uk_configtagrelation_configidtag` (`id`,`tag_name`,`tag_type`),
KEY `idx_tenant_id` (`tenant_id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb3 COLLATE=utf8_bin COMMENT='config_tag_relation';
-- 正在导出表 nacos.config_tags_relation 的数据:~0 rows (大约)
DELETE FROM `config_tags_relation`;
-- 导出 表 nacos.group_capacity 结构
DROP TABLE IF EXISTS `group_capacity`;
CREATE TABLE IF NOT EXISTS `group_capacity` (
`id` bigint unsigned NOT NULL AUTO_INCREMENT COMMENT '主键ID',
`group_id` varchar(128) COLLATE utf8_bin NOT NULL DEFAULT '' COMMENT 'Group ID,空字符表示整个集群',
`quota` int unsigned NOT NULL DEFAULT '0' COMMENT '配额,0表示使用默认值',
`usage` int unsigned NOT NULL DEFAULT '0' COMMENT '使用量',
`max_size` int unsigned NOT NULL DEFAULT '0' COMMENT '单个配置大小上限,单位为字节,0表示使用默认值',
`max_aggr_count` int unsigned NOT NULL DEFAULT '0' COMMENT '聚合子配置最大个数,,0表示使用默认值',
`max_aggr_size` int unsigned NOT NULL DEFAULT '0' COMMENT '单个聚合数据的子配置大小上限,单位为字节,0表示使用默认值',
`max_history_count` int unsigned NOT NULL DEFAULT '0' COMMENT '最大变更历史数量',
`gmt_create` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP COMMENT '创建时间',
`gmt_modified` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP COMMENT '修改时间',
PRIMARY KEY (`id`),
UNIQUE KEY `uk_group_id` (`group_id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb3 COLLATE=utf8_bin COMMENT='集群、各Group容量信息表';
-- 正在导出表 nacos.group_capacity 的数据:~0 rows (大约)
DELETE FROM `group_capacity`;
-- 导出 表 nacos.his_config_info 结构
DROP TABLE IF EXISTS `his_config_info`;
CREATE TABLE IF NOT EXISTS `his_config_info` (
`id` bigint unsigned NOT NULL,
`nid` bigint unsigned NOT NULL AUTO_INCREMENT,
`data_id` varchar(255) COLLATE utf8_bin NOT NULL,
`group_id` varchar(128) COLLATE utf8_bin NOT NULL,
`app_name` varchar(128) COLLATE utf8_bin DEFAULT NULL COMMENT 'app_name',
`content` longtext COLLATE utf8_bin NOT NULL,
`md5` varchar(32) COLLATE utf8_bin DEFAULT NULL,
`gmt_create` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP,
`gmt_modified` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP,
`src_user` text COLLATE utf8_bin,
`src_ip` varchar(50) COLLATE utf8_bin DEFAULT NULL,
`op_type` char(10) COLLATE utf8_bin DEFAULT NULL,
`tenant_id` varchar(128) COLLATE utf8_bin DEFAULT '' COMMENT '租户字段',
`encrypted_data_key` text COLLATE utf8_bin NOT NULL COMMENT '秘钥',
PRIMARY KEY (`nid`),
KEY `idx_gmt_create` (`gmt_create`),
KEY `idx_gmt_modified` (`gmt_modified`),
KEY `idx_did` (`data_id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb3 COLLATE=utf8_bin COMMENT='多租户改造';
-- 正在导出表 nacos.his_config_info 的数据:~0 rows (大约)
DELETE FROM `his_config_info`;
-- 导出 表 nacos.permissions 结构
DROP TABLE IF EXISTS `permissions`;
CREATE TABLE IF NOT EXISTS `permissions` (
`role` varchar(50) COLLATE utf8mb4_general_ci NOT NULL,
`resource` varchar(255) COLLATE utf8mb4_general_ci NOT NULL,
`action` varchar(8) COLLATE utf8mb4_general_ci NOT NULL,
UNIQUE KEY `uk_role_permission` (`role`,`resource`,`action`) USING BTREE
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_general_ci;
-- 正在导出表 nacos.permissions 的数据:~0 rows (大约)
DELETE FROM `permissions`;
-- 导出 表 nacos.roles 结构
DROP TABLE IF EXISTS `roles`;
CREATE TABLE IF NOT EXISTS `roles` (
`username` varchar(50) COLLATE utf8mb4_general_ci NOT NULL,
`role` varchar(50) COLLATE utf8mb4_general_ci NOT NULL,
UNIQUE KEY `idx_user_role` (`username`,`role`) USING BTREE
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_general_ci;
-- 正在导出表 nacos.roles 的数据:~1 rows (大约)
DELETE FROM `roles`;
INSERT INTO `roles` (`username`, `role`) VALUES
('nacos', 'ROLE_ADMIN');
-- 导出 表 nacos.tenant_capacity 结构
DROP TABLE IF EXISTS `tenant_capacity`;
CREATE TABLE IF NOT EXISTS `tenant_capacity` (
`id` bigint unsigned NOT NULL AUTO_INCREMENT COMMENT '主键ID',
`tenant_id` varchar(128) COLLATE utf8_bin NOT NULL DEFAULT '' COMMENT 'Tenant ID',
`quota` int unsigned NOT NULL DEFAULT '0' COMMENT '配额,0表示使用默认值',
`usage` int unsigned NOT NULL DEFAULT '0' COMMENT '使用量',
`max_size` int unsigned NOT NULL DEFAULT '0' COMMENT '单个配置大小上限,单位为字节,0表示使用默认值',
`max_aggr_count` int unsigned NOT NULL DEFAULT '0' COMMENT '聚合子配置最大个数',
`max_aggr_size` int unsigned NOT NULL DEFAULT '0' COMMENT '单个聚合数据的子配置大小上限,单位为字节,0表示使用默认值',
`max_history_count` int unsigned NOT NULL DEFAULT '0' COMMENT '最大变更历史数量',
`gmt_create` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP COMMENT '创建时间',
`gmt_modified` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP COMMENT '修改时间',
PRIMARY KEY (`id`),
UNIQUE KEY `uk_tenant_id` (`tenant_id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb3 COLLATE=utf8_bin COMMENT='租户容量信息表';
-- 正在导出表 nacos.tenant_capacity 的数据:~0 rows (大约)
DELETE FROM `tenant_capacity`;
-- 导出 表 nacos.tenant_info 结构
DROP TABLE IF EXISTS `tenant_info`;
CREATE TABLE IF NOT EXISTS `tenant_info` (
`id` bigint NOT NULL AUTO_INCREMENT COMMENT 'id',
`kp` varchar(128) COLLATE utf8_bin NOT NULL COMMENT 'kp',
`tenant_id` varchar(128) COLLATE utf8_bin DEFAULT '' COMMENT 'tenant_id',
`tenant_name` varchar(128) COLLATE utf8_bin DEFAULT '' COMMENT 'tenant_name',
`tenant_desc` varchar(256) COLLATE utf8_bin DEFAULT NULL COMMENT 'tenant_desc',
`create_source` varchar(32) COLLATE utf8_bin DEFAULT NULL COMMENT 'create_source',
`gmt_create` bigint NOT NULL COMMENT '创建时间',
`gmt_modified` bigint NOT NULL COMMENT '修改时间',
PRIMARY KEY (`id`),
UNIQUE KEY `uk_tenant_info_kptenantid` (`kp`,`tenant_id`),
KEY `idx_tenant_id` (`tenant_id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb3 COLLATE=utf8_bin COMMENT='tenant_info';
-- 正在导出表 nacos.tenant_info 的数据:~0 rows (大约)
DELETE FROM `tenant_info`;
-- 导出 表 nacos.users 结构
DROP TABLE IF EXISTS `users`;
CREATE TABLE IF NOT EXISTS `users` (
`username` varchar(50) COLLATE utf8mb4_general_ci NOT NULL,
`password` varchar(500) COLLATE utf8mb4_general_ci NOT NULL,
`enabled` tinyint(1) NOT NULL,
PRIMARY KEY (`username`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_general_ci;
-- 正在导出表 nacos.users 的数据:~1 rows (大约)
DELETE FROM `users`;
INSERT INTO `users` (`username`, `password`, `enabled`) VALUES
('nacos', '$2a$10$EuWPZHzz32dJN7jexM34MOeYirDdFAZm2kuWj7VEOJhhZkDrxfvUu', 1);
/*!40103 SET TIME_ZONE=IFNULL(@OLD_TIME_ZONE, 'system') */;
/*!40101 SET SQL_MODE=IFNULL(@OLD_SQL_MODE, '') */;
/*!40014 SET FOREIGN_KEY_CHECKS=IFNULL(@OLD_FOREIGN_KEY_CHECKS, 1) */;
/*!40101 SET CHARACTER_SET_CLIENT=@OLD_CHARACTER_SET_CLIENT */;
/*!40111 SET SQL_NOTES=IFNULL(@OLD_SQL_NOTES, 1) */;
env文件
PREFER_HOST_MODE=hostname
MODE=standalone
NACOS_AUTH_ENABLE=true
SPRING_DATASOURCE_PLATFORM=mysql
MYSQL_SERVICE_HOST=127.0.0.1
MYSQL_SERVICE_DB_NAME=nacos
MYSQL_SERVICE_PORT=3306
MYSQL_SERVICE_USER=root
MYSQL_SERVICE_PASSWORD="02120212"
MYSQL_SERVICE_DB_PARAM=characterEncoding=utf8&connectTimeout=1000&socketTimeout=3000&autoReconnect=true&useSSL=false&allowPublicKeyRetrieval=true&serverTimezone=Asia/Shanghai
启动命令
docker run -d \
--name nacos \
--env-file ./env \
-p 8848:8848 \
-p 9848:9848 \
-p 9849:9849 \
--restart=always \
nacos/nacos-server:v2.1.0-slim
调用微服务三种方式
第一种
- 使用http请求
在启动类中使用Bean注入
@MapperScan("com.heima.cart.mapper")
@SpringBootApplication
public class CartApplication {
public static void main(String[] args) {
SpringApplication.run(CartApplication.class, args);
}
@Bean
public RestTemplate restTemplate() {
return new RestTemplate();
}
}
实现类中注入RestTemplate
,注意加上@RequiredArgsConstructor
@Service
@RequiredArgsConstructor
public class CartServiceImpl extends ServiceImpl<CartMapper, Cart> implements ICartService {
private final RestTemplate restTemplate;
}
使用调用发送请求
private void handleCartItems(List<CartVO> vos) {
// 1.获取商品id
Set<Long> itemIds = vos.stream().map(CartVO::getItemId).collect(Collectors.toSet());
// 2.查询商品
ResponseEntity<List<ItemDTO>> response = restTemplate.exchange("http://localhost:8081/items?ids={ids}",
HttpMethod.GET, null, new ParameterizedTypeReference<>() {
},
Map.of("ids", StringUtils.join(itemIds, ",")));
List<ItemDTO> items = response.getBody();
// ...
}
第二种
- 使用负载均衡方式引入
引入nacos discovery依赖
<!--统一配置管理-->
<dependency>
<groupId>com.alibaba.cloud</groupId>
<artifactId>spring-cloud-starter-alibaba-nacos-config</artifactId>
</dependency>
<dependency>
<groupId>com.alibaba.cloud</groupId>
<artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
</dependency>
<!--加载bootstrap-->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-bootstrap</artifactId>
</dependency>
将配置文件改为bootstrap
,配置nacos地址
spring:
cloud:
nacos:
discovery:
server-addr:http://192.168.3.98/:8848
namespace: hmall
group: hmall-bunny
config:
server-addr: http://192.168.3.98/:8848
namespace: hmall
file-extension: yml
如果在
discovery
中加入了group
,此时被调用的服务也要有group
而且要和当前的group
一致。
加入负载均衡
@Service
@RequiredArgsConstructor
public class CartServiceImpl extends ServiceImpl<CartMapper, Cart> implements ICartService {
private final DiscoveryClient discoveryClient;
// 1.获取商品id
Set<Long> itemIds = vos.stream().map(CartVO::getItemId).collect(Collectors.toSet());
// 2.查询商品,使用负载均衡
List<ServiceInstance> instances = discoveryClient.getInstances("item-service");
ServiceInstance instance = instances.get(RandomUtil.randomInt(instances.size()));
// 将原始的地址改为:instance.getUri()
ResponseEntity<List<ItemDTO>> response = restTemplate.exchange(instance.getUri() + "/items?ids={ids}",
HttpMethod.GET, null, new ParameterizedTypeReference<>() {
},
Map.of("ids", StringUtils.join(itemIds, ",")));
List<ItemDTO> items = response.getBody();
List<ItemDTO> items = itemClient.queryItemsByIds(itemIds);
}
第三种
- 使用openfeign
引入依赖
<!-- openfeign相关 -->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-openfeign</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-loadbalancer</artifactId>
</dependency>
<dependency>
<groupId>io.github.openfeign</groupId>
<artifactId>feign-okhttp</artifactId>
</dependency>
在启动类上加上注解@EnableFeignClients
@MapperScan("com.heima.cart.mapper")
@SpringBootApplication
@EnableFeignClients
public class CartApplication {
public static void main(String[] args) {
SpringApplication.run(CartApplication.class, args);
}
}
编写FeignClient,其中item-service
是指配置文件中name
名字,一定要保持一致
@FeignClient(value = "item-service")
public interface ItemClient {
@GetMapping("/items")
List<ItemDTO> queryItemsByIds(@RequestParam("ids") Collection<Long> ids);
}
之后和正常调用接口即可
private void handleCartItems(List<CartVO> vos) {
// 1.获取商品id
Set<Long> itemIds = vos.stream().map(CartVO::getItemId).collect(Collectors.toSet());
// 2.查询商品
List<ItemDTO> items = itemClient.queryItemsByIds(itemIds);
// ...
}
nacos 共享配置
如果在nacos中有部分配置是相同的,可以设置为共享配置。
需要注意的是,如果在共享配置中制定了namespace
、group
那么在配置文件中也要有这些内容。
并且共享配置要在SpringBoot配置文件config
下配置
特别要注意!!!如果Data ID名称为my-common
那么在shared-configs
中为- data-id: my-common
,要与名称一样,不要加.yaml
如果data id有.yml
那么在配置文件中就要有.yml
名称必须要一至。
cloud:
nacos:
discovery:
server-addr: 192.168.3.10:8848
namespace: hmall
config:
server-addr: 192.168.3.10:8848
namespace: hmall
file-extension: yml
shared-configs:
- data-id: hmall-common.yml
refresh: true
分配置是相同的,可以设置为共享配置。
需要注意的是,如果在共享配置中制定了namespace
、group
那么在配置文件中也要有这些内容。
并且共享配置要在SpringBoot配置文件config
下配置
特别要注意!!!如果Data ID名称为my-common
那么在shared-configs
中为- data-id: my-common
,要与名称一样,不要加.yaml
如果data id有.yml
那么在配置文件中就要有.yml
名称必须要一至。
cloud:
nacos:
discovery:
server-addr: 192.168.3.10:8848
namespace: hmall
config:
server-addr: 192.168.3.10:8848
namespace: hmall
file-extension: yml
shared-configs:
- data-id: hmall-common.yml
refresh: true