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Add lesson 3
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‎spring-cloud/lesson-3/README.md

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‎spring-cloud/lesson-3/[课件] Spring Cloud 配置服务器.pdf

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‎spring-cloud/lesson-3/spring-cloud-lesson-3-config-client/.gitignore

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target/
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!.mvn/wrapper/maven-wrapper.jar
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### STS ###
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.apt_generated
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.classpath
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.factorypath
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.project
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.settings
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.springBeans
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### IntelliJ IDEA ###
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.idea
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*.iws
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*.iml
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*.ipr
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### NetBeans ###
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nbproject/private/
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build/
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nbbuild/
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dist/
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nbdist/
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.nb-gradle/

‎spring-cloud/lesson-3/spring-cloud-lesson-3-config-client/pom.xml

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<?xml version="1.0" encoding="UTF-8"?>
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<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
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<modelVersion>4.0.0</modelVersion>
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<groupId>com.segmentfault</groupId>
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<artifactId>spring-cloud-lesson-3-config-client</artifactId>
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<version>0.0.1-SNAPSHOT</version>
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<packaging>jar</packaging>
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<name>spring-cloud-lesson-3-config-client</name>
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<description>Demo project for Spring Boot</description>
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<parent>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter-parent</artifactId>
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<version>1.5.8.RELEASE</version>
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<relativePath/> <!-- lookup parent from repository -->
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</parent>
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<properties>
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<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
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<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
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<java.version>1.8</java.version>
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<spring-cloud.version>Dalston.SR4</spring-cloud.version>
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</properties>
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<dependencies>
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<dependency>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter-actuator</artifactId>
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</dependency>
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<dependency>
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<groupId>org.springframework.cloud</groupId>
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<artifactId>spring-cloud-starter-config</artifactId>
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</dependency>
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<dependency>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter-web</artifactId>
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</dependency>
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<dependency>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter-test</artifactId>
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<scope>test</scope>
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</dependency>
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</dependencies>
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<dependencyManagement>
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<dependencies>
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<dependency>
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<groupId>org.springframework.cloud</groupId>
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<artifactId>spring-cloud-dependencies</artifactId>
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<version>${spring-cloud.version}</version>
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<type>pom</type>
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<scope>import</scope>
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</dependency>
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</dependencies>
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</dependencyManagement>
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<build>
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<plugins>
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<plugin>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-maven-plugin</artifactId>
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</plugin>
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</plugins>
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</build>
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</project>

‎spring-cloud/lesson-3/spring-cloud-lesson-3-config-client/src/main/java/com/segmentfault/springcloudlesson3configclient/SpringCloudLesson3ConfigClientApplication.java

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package com.segmentfault.springcloudlesson3configclient;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.boot.SpringApplication;
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import org.springframework.boot.actuate.health.Health;
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import org.springframework.boot.actuate.health.HealthIndicator;
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import org.springframework.boot.actuate.health.Status;
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import org.springframework.boot.autoconfigure.SpringBootApplication;
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import org.springframework.cloud.context.refresh.ContextRefresher;
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import org.springframework.context.annotation.Bean;
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import org.springframework.scheduling.annotation.Scheduled;
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import java.util.Set;
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@SpringBootApplication
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public class SpringCloudLesson3ConfigClientApplication {
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private final ContextRefresher contextRefresher;
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@Autowired
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public SpringCloudLesson3ConfigClientApplication(ContextRefresher contextRefresher) {
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this.contextRefresher = contextRefresher;
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}
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public static void main(String[] args) {
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SpringApplication.run(SpringCloudLesson3ConfigClientApplication.class, args);
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}
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@Scheduled(fixedRate = 1000L)
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public void update() {
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Set<String> keys = contextRefresher.refresh();
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if (!keys.isEmpty()) {
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System.out.println("本次更新的配置项: " + keys);
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}
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}
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@Bean
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public MyHealthIndicator myHealthIndicator() {
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return new MyHealthIndicator();
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}
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private class MyHealthIndicator implements HealthIndicator {
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@Override
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public Health health() {
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Health.Builder builder = Health.status(Status.UP);
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builder.withDetail("name", "MyHealthIndicator");
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builder.withDetail("timestamp", System.currentTimeMillis());
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return builder.build();
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}
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}
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}

‎spring-cloud/lesson-3/spring-cloud-lesson-3-config-client/src/main/java/com/segmentfault/springcloudlesson3configclient/domain/User.java

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package com.segmentfault.springcloudlesson3configclient.domain;
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import org.springframework.boot.context.properties.ConfigurationProperties;
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/**
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* 用户模型
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*
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* @author <a href="mailto:mercyblitz@gmail.com">Mercy</a>
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* @since 1.0.0
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*/
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@ConfigurationProperties(prefix = "sf.user")
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public class User {
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private Long id;
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private String name;
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public Long getId() {
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return id;
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}
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public void setId(Long id) {
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this.id = id;
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}
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public String getName() {
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return name;
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}
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public void setName(String name) {
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this.name = name;
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}
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}

‎spring-cloud/lesson-3/spring-cloud-lesson-3-config-client/src/main/java/com/segmentfault/springcloudlesson3configclient/web.controller/UserController.java

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package com.segmentfault.springcloudlesson3configclient.web.controller;
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import com.segmentfault.springcloudlesson3configclient.domain.User;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.boot.context.properties.EnableConfigurationProperties;
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import org.springframework.web.bind.annotation.GetMapping;
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import org.springframework.web.bind.annotation.RestController;
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/**
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* 用户 Controller
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*
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* @author <a href="mailto:mercyblitz@gmail.com">Mercy</a>
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* @since 1.0.0
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*/
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@RestController
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@EnableConfigurationProperties(User.class)
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public class UserController {
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//通过构造器注入
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private final User user;
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@Autowired
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public UserController(User user) {
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this.user = user;
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}
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@GetMapping("/user")
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public User user() {
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return user;
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}
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}

‎spring-cloud/lesson-3/spring-cloud-lesson-3-config-client/src/main/resources/application.properties

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## 配置客户端应用名称
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spring.application.name = spring-cloud-config-client
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## 配置客户端应用服务端口
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server.port = 8080
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## 关闭管理端actuator 的安全
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## /env /health 端口完全开放
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management.security.enabled = false
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## 激活 restart Endpoint
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endpoints.restart.enabled = true
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## 用户的配置信息
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## 用户 ID
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sf.user.id = 1
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## 用户名称
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sf.user.name = xiaomage

‎spring-cloud/lesson-3/spring-cloud-lesson-3-config-client/src/main/resources/bootstrap.properties

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## 配置客户端应用关联的应用
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## spring.cloud.config.name 是可选的
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## 如果没有配置，采用 ${spring.application.name}
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spring.cloud.config.name = segmentfault
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## 关联 profile
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spring.cloud.config.profile = prod
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## 关联 label
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spring.cloud.config.label = master
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## 配置配置服务器URI
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spring.cloud.config.uri = http://127.0.0.1:9090/

‎spring-cloud/lesson-3/spring-cloud-lesson-3-config-client/src/test/java/com/segmentfault/springcloudlesson3configclient/SpringCloudLesson3ConfigClientApplicationTests.java

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package com.segmentfault.springcloudlesson3configclient;
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import org.junit.Test;
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import org.junit.runner.RunWith;
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import org.springframework.boot.test.context.SpringBootTest;
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import org.springframework.test.context.junit4.SpringRunner;
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@RunWith(SpringRunner.class)
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@SpringBootTest
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public class SpringCloudLesson3ConfigClientApplicationTests {
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@Test
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public void contextLoads() {
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}
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}

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