根据04版补全程序更新P19双写程序。

src/test/java/com/zdjizhi/nacos/NacosTest.java

@@ -0,0 +1,100 @@
+package com.zdjizhi.nacos;
+
+import com.alibaba.nacos.api.NacosFactory;
+import com.alibaba.nacos.api.PropertyKeyConst;
+import com.alibaba.nacos.api.config.ConfigService;
+import com.alibaba.nacos.api.config.listener.Listener;
+import com.alibaba.nacos.api.exception.NacosException;
+import org.junit.Test;
+
+import java.io.IOException;
+import java.io.StringReader;
+import java.util.Properties;
+import java.util.concurrent.Executor;
+
+
+/**
+ * @author qidaijie
+ * @Package com.zdjizhi
+ * @Description:
+ * @date 2022/3/1016:58
+ */
+public class NacosTest {
+
+    /**
+     * <dependency>
+     * <groupId>com.alibaba.nacos</groupId>
+     * <artifactId>nacos-client</artifactId>
+     * <version>1.2.0</version>
+     * </dependency>
+     */
+
+    private static Properties properties = new Properties();
+    /**
+     * config data id = config name
+     */
+    private static final String DATA_ID = "test";
+    /**
+     * config group
+     */
+    private static final String GROUP = "Galaxy";
+
+    private void getProperties() {
+        properties.setProperty(PropertyKeyConst.SERVER_ADDR, "192.168.44.12:8848");
+        properties.setProperty(PropertyKeyConst.NAMESPACE, "flink");
+        properties.setProperty(PropertyKeyConst.USERNAME, "nacos");
+        properties.setProperty(PropertyKeyConst.PASSWORD, "nacos");
+    }
+
+
+    @Test
+    public void GetConfigurationTest() {
+        try {
+            getProperties();
+            ConfigService configService = NacosFactory.createConfigService(properties);
+            String content = configService.getConfig(DATA_ID, GROUP, 5000);
+            Properties nacosConfigMap = new Properties();
+            nacosConfigMap.load(new StringReader(content));
+            System.out.println(nacosConfigMap.getProperty("source.kafka.servers"));
+        } catch (NacosException | IOException e) {
+            // TODO Auto-generated catch block
+            e.printStackTrace();
+        }
+
+    }
+
+    @Test
+    public void ListenerConfigurationTest() {
+        getProperties();
+        try {
+            //first get config
+            ConfigService configService = NacosFactory.createConfigService(properties);
+            String config = configService.getConfig(DATA_ID, GROUP, 5000);
+            System.out.println(config);
+
+            //start listenner
+            configService.addListener(DATA_ID, GROUP, new Listener() {
+                @Override
+                public Executor getExecutor() {
+                    return null;
+                }
+
+                @Override
+                public void receiveConfigInfo(String configMsg) {
+                    System.out.println(configMsg);
+                }
+            });
+        } catch (NacosException e) {
+            e.printStackTrace();
+        }
+
+        //keep running,change nacos config,print new config
+        while (true) {
+            try {
+                Thread.sleep(5000);
+            } catch (InterruptedException e) {
+                e.printStackTrace();
+            }
+        }
+    }
+}