博主
258
258
258
258
标签
elasticsearch kibana LayUI rabbitmq Vue3 springboot linux jdk centos
专辑

第十四节 SpringBoot 2.4.2集成nacos 2.0.3 配置中心

亮子 2022-12-28 13:41:10 17763 0 0 0

1、添加nacos config的依赖

  • 手动添加依赖
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-config</artifactId>
        </dependency>
  • 创建项目时添加依赖

图片alt

2、添加SpringCloud的依赖

从目前实测看，如果没有SpringCloud，则nacos config还是无法生效的。

图片alt

  • 完整的pom.xml文件如下：
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.4.2</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.shenmazg6</groupId>
    <artifactId>server-zg6-config</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>server-zg6-config</name>
    <description>Demo project for Spring Boot</description>

    <properties>
        <java.version>1.8</java.version>
        <spring-cloud-alibaba.version>2021.1</spring-cloud-alibaba.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <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>

        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>

        <!-- 加载配置文件 bootstrap.properties -->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-bootstrap</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-loadbalancer</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-openfeign</artifactId>
        </dependency>


    </dependencies>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>com.alibaba.cloud</groupId>
                <artifactId>spring-cloud-alibaba-dependencies</artifactId>
                <version>${spring-cloud-alibaba.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>2020.0.6</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.8.1</version>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                    <encoding>UTF-8</encoding>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

3、添加配置类

package com.shenmazg6.config.nacosconfig;

import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
import org.springframework.context.annotation.Configuration;

/**
 * @author <a href="mailto:chenxilzx1@gmail.com">theonefx</a>
 */
@EnableAutoConfiguration
@Configuration
public class NacosConfigConfiguration {
}

图片alt

4、修改配置文件 bootstrap.properties

# 应用名称
spring.application.name=server-zg6-config

# 应用服务 WEB 访问端口
server.port=8192

# Nacos帮助文档: https://nacos.io/zh-cn/docs/concepts.html
# Nacos认证信息
spring.cloud.nacos.discovery.username=nacos
spring.cloud.nacos.discovery.password=1912@a
# Nacos 服务发现与注册配置，其中子属性 server-addr 指定 Nacos 服务器主机和端口
spring.cloud.nacos.discovery.server-addr=8.142.83.78:8848
# 注册到 nacos 的指定 namespace，默认为 public
spring.cloud.nacos.discovery.namespace=public
spring.cloud.nacos.discovery.group=zhouhaijun


# Nacos帮助文档: https://nacos.io/zh-cn/docs/concepts.html
# Nacos认证信息
spring.cloud.nacos.config.username=nacos
spring.cloud.nacos.config.password=1912@a
spring.cloud.nacos.config.contextPath=/nacos
# 设置配置中心服务端地址
spring.cloud.nacos.config.server-addr=8.142.83.78:8848
# Nacos 配置中心的namespace。需要注意，如果使用 public 的 namcespace ，请不要填写这个值，直接留空即可
#spring.cloud.nacos.config.namespace=public
spring.cloud.nacos.config.group=zhouhaijun
#spring.cloud.nacos.config.file-extension=properties
spring.cloud.nacos.config.refresh-enabled=true

针对配置文件，有两个坑点：

  • 坑点一：必须添加如下依赖，否则高版本的SpringBoot默认已经不加载bootstrap.properties文件了
        <!-- 加载配置文件 bootstrap.properties -->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-bootstrap</artifactId>
        </dependency>
  • 坑点二：最好只使用 bootstrap.properties 这一个配置文件，如果再有application.properties配置文件，则无法实现配置自动更新，应该是和服务名有关，建议不要节外生枝。

5、在nacos config服务器上配置

图片alt

site.welcome=2005a20052006200720082009
message=hello,world

6、编写控制层获取配置信息

package com.shenmazg6.config.controller;

import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.cloud.context.config.annotation.RefreshScope;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

/**
 * @author 军哥
 * @version 1.0
 * @description: ConfigController
 * @date 2022/12/28 15:30
 */

@RestController
@Slf4j
@RequestMapping(value = "/config")
@RefreshScope
public class ConfigController {

    @Value("${site.welcome}")
    private String welcome;

    @GetMapping(value = "/hello")
    public String hello() {
        return welcome + "," + System.currentTimeMillis();
    }
}

7、测试

图片alt