Update java.md

java.md

@@ -1,64 +1,27 @@
-/*
-* Demo for Nacos
-* pom.xml
-    <dependency>
-        <groupId>com.alibaba.nacos</groupId>
-        <artifactId>nacos-client</artifactId>
-        <version>${version}</version>
-    </dependency>
-*/
-package com.alibaba.nacos.example;
+// Refer to document: https://github.com/nacos-group/nacos-examples/tree/master/nacos-spring-boot-example/nacos-spring-boot-config-example
+package com.alibaba.nacos.example.spring.boot.controller;
 
-import java.util.Properties;
-import java.util.concurrent.Executor;
-import com.alibaba.nacos.api.NacosFactory;
-import com.alibaba.nacos.api.config.ConfigService;
-import com.alibaba.nacos.api.config.listener.Listener;
-import com.alibaba.nacos.api.exception.NacosException;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.stereotype.Controller;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.ResponseBody;
 
-/**
- * Config service example
- *
- * @author Nacos
- *
- */
-public class ConfigExample {
+import static org.springframework.web.bind.annotation.RequestMethod.GET;
 
-	public static void main(String[] args) throws NacosException, InterruptedException {
-		String serverAddr = "localhost";
-		String dataId = "application-prod.yml";
-		String group = "DEFAULT_GROUP";
-		Properties properties = new Properties();
-		properties.put(PropertyKeyConst.SERVER_ADDR, serverAddr);
-		ConfigService configService = NacosFactory.createConfigService(properties);
-		String content = configService.getConfig(dataId, group, 5000);
-		System.out.println(content);
-		configService.addListener(dataId, group, new Listener() {
-			@Override
-			public void receiveConfigInfo(String configInfo) {
-				System.out.println("receive:" + configInfo);
-			}
+@Controller
+@RequestMapping("config")
+public class ConfigController {
 
-			@Override
-			public Executor getExecutor() {
-				return null;
-			}
-		});
+    @Value("${useLocalCache:false}")
+    private boolean useLocalCache;
 
-		boolean isPublishOk = configService.publishConfig(dataId, group, "content");
-		System.out.println(isPublishOk);
+    public void setUseLocalCache(boolean useLocalCache) {
+        this.useLocalCache = useLocalCache;
+    }
 
-		Thread.sleep(3000);
-		content = configService.getConfig(dataId, group, 5000);
-		System.out.println(content);
-
-		boolean isRemoveOk = configService.removeConfig(dataId, group);
-		System.out.println(isRemoveOk);
-		Thread.sleep(3000);
-
-		content = configService.getConfig(dataId, group, 5000);
-		System.out.println(content);
-		Thread.sleep(300000);
-
-	}
-}
+    @RequestMapping(value = "/get", method = GET)
+    @ResponseBody
+    public boolean get() {
+        return useLocalCache;
+    }
+}