sdk-examples add nacos-spring-boot-config-example #48

sdk-examples/java/spring-boot/nacos-spring-boot-config-example/.gitignore

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+*.iml
+target/

sdk-examples/java/spring-boot/nacos-spring-boot-config-example/README.md

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+
+# nacos-spring-boot-config-example 说明
+
+本样例基于 https://github.com/nacos-group/nacos-examples/tree/master/nacos-spring-boot-example/nacos-spring-boot-config-example  修改
+
+
+
+## 使用方式
+
+1. 启动r-nacos  
+2. 在public命名空间下增加一个配置， 配置Id: `example`  配置组: `DEFAULT_GROUP` 配置内容：`useLocalCache=true`
+3. 启动spring-boot应用，在本项目目录运行 `mvn spring-boot:run`
+4. 访问应用接口 `curl "http://127.0.0.1:8080/config/get",`请求结果为`true`; 或者直接用浏览器打开`http://127.0.0.1:8080/config/get`
+5. 验证动态修改配置能力，在r-nacos控制台中修改第2步配置内容为`useLocalCache=false`，在第4步请求的结果变更为`false`;
+
+
+

sdk-examples/java/spring-boot/nacos-spring-boot-config-example/pom.xml

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+<?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">
+
+    <parent>
+		<groupId>org.springframework.boot</groupId>
+		<artifactId>spring-boot-starter-parent</artifactId>
+		<version>2.7.15</version>
+		<relativePath/> <!-- lookup parent from repository -->
+	</parent>
+    <modelVersion>4.0.0</modelVersion>
+	<groupId>com.nacos.demo</groupId>
+    <artifactId>nacos-spring-boot-config-example</artifactId>
+	<version>0.0.1-SNAPSHOT</version>
+	<name>nacos-config</name>
+	<properties>
+		<java.version>1.8</java.version>
+		<nacos.client.version>1.4.6</nacos.client.version>
+        <nacos-config-spring-boot.version>0.2.12</nacos-config-spring-boot.version>
+	</properties>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-web</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-actuator</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>com.alibaba.boot</groupId>
+            <artifactId>nacos-config-spring-boot-starter</artifactId>
+            <version>${nacos-config-spring-boot.version}</version>
+        </dependency>
+
+        <dependency>
+            <groupId>com.alibaba.boot</groupId>
+            <artifactId>nacos-config-spring-boot-actuator</artifactId>
+            <version>${nacos-config-spring-boot.version}</version>
+        </dependency>
+    </dependencies>
+    <build>
+		<plugins>
+			<plugin>
+				<groupId>org.springframework.boot</groupId>
+				<artifactId>spring-boot-maven-plugin</artifactId>
+			</plugin>
+		</plugins>
+	</build>
+</project>

sdk-examples/java/spring-boot/nacos-spring-boot-config-example/src/main/java/com/alibaba/nacos/example/spring/boot/NacosConfigApplication.java

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+package com.alibaba.nacos.example.spring.boot;
+
+import com.alibaba.nacos.spring.context.annotation.config.NacosPropertySource;
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+/**
+ * Document: https://nacos.io/zh-cn/docs/quick-start-spring-boot.html
+ * <p>
+ * Nacos 控制台添加配置：
+ * <p>
+ * Data ID：example
+ * <p>
+ * Group：DEFAULT_GROUP
+ * <p>
+ * 配置内容：useLocalCache=true
+ */
+@SpringBootApplication
+@NacosPropertySource(dataId = "example", autoRefreshed = true)
+public class NacosConfigApplication {
+
+    public static void main(String[] args) {
+        SpringApplication.run(NacosConfigApplication.class, args);
+    }
+}

sdk-examples/java/spring-boot/nacos-spring-boot-config-example/src/main/java/com/alibaba/nacos/example/spring/boot/controller/ConfigController.java

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+package com.alibaba.nacos.example.spring.boot.controller;
+
+import com.alibaba.nacos.api.config.annotation.NacosValue;
+import org.springframework.stereotype.Controller;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.ResponseBody;
+
+import static org.springframework.web.bind.annotation.RequestMethod.GET;
+
+@Controller
+@RequestMapping("config")
+public class ConfigController {
+
+    @NacosValue(value = "${useLocalCache:false}", autoRefreshed = true)
+    private boolean useLocalCache;
+
+    @RequestMapping(value = "/get", method = GET)
+    @ResponseBody
+    public boolean get() {
+        return useLocalCache;
+    }
+}

sdk-examples/java/spring-boot/nacos-spring-boot-config-example/src/main/resources/application.properties

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+nacos.config.server-addr=127.0.0.1:8848
+
+# endpoint http://localhost:8080/actuator/nacos-config
+# health http://localhost:8080/actuator/health
+management.endpoints.web.exposure.include=*
+management.endpoint.health.show-details=always