fix:refactor the project and optimize the configuration loading method

src/main/java/com/zdjizhi/conf/DosConfiguration.java

@@ -0,0 +1,36 @@
+package com.zdjizhi.conf;
+
+import org.apache.flink.configuration.Configuration;
+
+import java.util.Properties;
+
+
+public class DosConfiguration {
+    private final Configuration config;
+
+    public DosConfiguration(final Configuration config) {
+        this.config = config;
+    }
+
+    /**
+     * Retrieves properties from the underlying `Configuration` instance that start with the specified
+     * `prefix`. The properties are then converted into a `java.util.Properties` object and returned.
+     *
+     * @param prefix The prefix to filter properties.
+     * @return A `java.util.Properties` object containing the properties with the specified prefix.
+     */
+    public Properties getProperties(final String prefix) {
+        if (prefix == null) {
+            final Properties props = new Properties();
+            props.putAll(config.toMap());
+            return props;
+        }
+        return config.toMap()
+                .entrySet()
+                .stream()
+                .filter(entry -> entry.getKey().startsWith(prefix))
+                .collect(Properties::new, (props, e) ->
+                                props.setProperty(e.getKey().substring(prefix.length()), e.getValue()),
+                        Properties::putAll);
+    }
+}