Spring Cloud Config入门（本地配置）

spring cloud config 简介

Spring Cloud Config为分布式系统中的外部化配置提供服务器和客户端支持。使用Config Server，您可以在所有环境中管理应用程序的外部属性。
Spring Cloud Config 分为两个部分，server端和client端。

server端配置服务器，管理配置信息

client端获取配置信息

创建并运行一个Spring Cloud Config Server

创建一个名为config-server的应用,并添加spring-cloud-starter-parent,spring-cloud-config-server依赖,pom信息具体如下

<?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 http://maven.apache.org/xsd/maven-4.0.0.xsd">

    <modelVersion>4.0.0</modelVersion>

    <groupId>com.zcr.test</groupId>

    <artifactId>config-server</artifactId>

    <version>1.0-SNAPSHOT</version>

    <packaging>jar</packaging>

    <name>config-server</name>

    <description>Demo project for Spring Boot</description>

    <parent>

        <groupId>org.springframework.boot</groupId>

        <artifactId>spring-boot-starter-parent</artifactId>

        <version>1.5.2.RELEASE</version>

    </parent>

    <properties>

        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>

        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>

        <java.version>1.8</java.version>

    </properties>

    <dependencies>

        <dependency>

            <groupId>org.springframework.cloud</groupId>

            <artifactId>spring-cloud-config-server</artifactId>

        </dependency>

        <dependency>

            <groupId>org.springframework.boot</groupId>

            <artifactId>spring-boot-starter-test</artifactId>

            <scope>test</scope>

        </dependency>

        <dependency>

            <groupId>org.springframework.cloud</groupId>

            <artifactId>spring-cloud-starter-eureka</artifactId>

        </dependency>

    </dependencies>

    <dependencyManagement>

        <dependencies>

            <dependency>

                <groupId>org.springframework.cloud</groupId>

                <artifactId>spring-cloud-dependencies</artifactId>

                <version>Camden.SR6</version>

                <type>pom</type>

                <scope>import</scope>

            </dependency>

        </dependencies>

    </dependencyManagement>

    <build>

        <plugins>

            <plugin>

                <groupId>org.springframework.boot</groupId>

                <artifactId>spring-boot-maven-plugin</artifactId>

            </plugin>

        </plugins>

    </build>

</project>

创建application主类，并添加@EnableConfigServer注解，代码如下

package com.zcr.spring;

import org.springframework.boot.SpringApplication;

import org.springframework.boot.autoconfigure.SpringBootApplication;

import org.springframework.cloud.config.server.EnableConfigServer;

@SpringBootApplication

@EnableConfigServer

public class ConfigServerApplication {

    public static void main(String[] args) {

        SpringApplication.run(ConfigServerApplication.class,args);

    }

}

在本地创建一个配置文件db-service-dev.properties，格式如下

sck.type=sck

sck.url=jdbc:oracle:thin:@10.1.50.205:1521:orcl

sck.class=oracle.jdbc.driver.OracleDriver

sck.user=sddb

sck.password=sddb

eom.type=eom

eom.url=jdbc:oracle:thin:@10.1.50.205:1521:orcl

eom.class=oracle.jdbc.driver.OracleDriver

eom.user=eom

eom.password=eom

在resources文件夹下创建application.properties，内容如下

#tomcat端口号

server.port=8888

#配置文件在本地

spring.profiles.active=native

#配置文件的目录

spring.cloud.config.server.native.search-locations=D:/workspace/GitHub/spring-config/config-file

目录结构：

运行应用并打开网址http://localhost:8888/db-service/dev，出现如下页面，证明配置文件发布成功

创建并运行一个Spring Cloud Config Client

创建一个名为config-client的应用,并添加spring-cloud-starter-parent,spring-cloud-starter-config,spring-boot-starter-web依赖,pom信息具体如下

<?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 http://maven.apache.org/xsd/maven-4.0.0.xsd">

    <modelVersion>4.0.0</modelVersion>

    <groupId>com.zcr.spring</groupId>

    <artifactId>config-client</artifactId>

    <version>1.0-SNAPSHOT</version>

    <parent>

        <groupId>org.springframework.boot</groupId>

        <artifactId>spring-boot-starter-parent</artifactId>

        <version>1.5.2.RELEASE</version>

    </parent>

    <properties>

        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>

        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>

        <java.version>1.8</java.version>

    </properties>

    <dependencies>

        <dependency>

            <groupId>org.springframework.cloud</groupId>

            <artifactId>spring-cloud-starter-config</artifactId>

        </dependency>

        <dependency>

            <groupId>org.springframework.boot</groupId>

            <artifactId>spring-boot-starter-web</artifactId>

        </dependency>

        <dependency>

            <groupId>org.springframework.boot</groupId>

            <artifactId>spring-boot-starter-test</artifactId>

            <scope>test</scope>

        </dependency>

    <dependencyManagement>

        <dependencies>

            <dependency>

                <groupId>org.springframework.cloud</groupId>

                <artifactId>spring-cloud-dependencies</artifactId>

                <version>Dalston.RC1</version>

                <type>pom</type>

                <scope>import</scope>

            </dependency>

        </dependencies>

    </dependencyManagement>

    <build>

        <plugins>

            <plugin>

                <groupId>org.springframework.boot</groupId>

                <artifactId>spring-boot-maven-plugin</artifactId>

            </plugin>

        </plugins>

    </build>

    <repositories>

        <repository>

            <id>spring-milestones</id>

            <name>Spring Milestones</name>

            <url>https://repo.spring.io/milestone</url>

            <snapshots>

                <enabled>false</enabled>

            </snapshots>

        </repository>

    </repositories>

</project>

在resources中创建bootstrap.properties（bootstrap.yml会在应用启动之前读取），格式如下

#文件名

spring.application.name=db-service

#文件模式，默认为default

spring.cloud.config.profile=dev

#server端ip地址

spring.cloud.config.uri= http://localhost:8888/

#client端ip端口

server.port=8881

创建一个controller

package com.zcr.spring;

import org.springframework.beans.factory.annotation.Value;

import org.springframework.boot.SpringApplication;

import org.springframework.boot.autoconfigure.SpringBootApplication;

import org.springframework.web.bind.annotation.RequestMapping;

import org.springframework.web.bind.annotation.RestController;

@SpringBootApplication

@RestController

public class ConfigClientApplication {

    public static void main(String[] args) {

        SpringApplication.run(ConfigClientApplication.class, args);

    }

    @Value("${sck.user}")

    String sckUser;

    @Value("${sck.password}")

    String sckPassword;

    @RequestMapping("/hello")

    public String showUserAndPassword(){

        String sb = "username is " + sckUser + "," + "password is " +sckPassword;

        return sb;

    }

}

启动Application，并访问http://localhost:8881/hello，出现如下界面，成功

遗留问题：1.初始化时，注入在static代码块之后，故静态代码块无法获取远程配置信息。

2.对spring了解浅。不懂内部原理，bug调试过程中比较费劲。

3.对spring中的注解不了解。

源码地址：https://github.com/310834626/spring-cloud-config

参考：http://www.jianshu.com/p/69dea19abf04

http://blog.didispace.com/springcloud4/

http://tech.lede.com/2017/06/12/rd/server/springCloudConfig/