spring config 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。

spring config 本地配置

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