[DS-6606] [common] JSONUtils#getNodeString String type (#6618)

dolphinscheduler-common/src/main/java/org/apache/dolphinscheduler/common/utils/JSONUtils.java

@@ -31,6 +31,7 @@ import java.util.ArrayList;
 import java.util.Collections;
 import java.util.List;
 import java.util.Map;
+import java.util.Objects;
 import java.util.TimeZone;
 
 import org.slf4j.Logger;
@@ -231,7 +232,11 @@ public class JSONUtils {
     public static String getNodeString(String json, String nodeName) {
         try {
             JsonNode rootNode = objectMapper.readTree(json);
-            return rootNode.has(nodeName) ? rootNode.get(nodeName).toString() : "";
+            JsonNode jsonNode = rootNode.findValue(nodeName);
+            if (Objects.isNull(jsonNode)) {
+                return "";
+            }
+            return jsonNode.isTextual() ? jsonNode.asText() : jsonNode.toString();
         } catch (JsonProcessingException e) {
             return "";
         }

dolphinscheduler-common/src/test/java/org/apache/dolphinscheduler/common/utils/JSONUtilsTest.java

@@ -151,7 +151,9 @@ public class JSONUtilsTest {
         Assert.assertEquals("", JSONUtils.getNodeString("", "key"));
         Assert.assertEquals("", JSONUtils.getNodeString("abc", "key"));
         Assert.assertEquals("", JSONUtils.getNodeString("{\"bar\":\"foo\"}", "key"));
-        Assert.assertEquals("\"foo\"", JSONUtils.getNodeString("{\"bar\":\"foo\"}", "bar"));
+        Assert.assertEquals("foo", JSONUtils.getNodeString("{\"bar\":\"foo\"}", "bar"));
+        Assert.assertEquals("[1,2,3]", JSONUtils.getNodeString("{\"bar\": [1,2,3]}", "bar"));
+        Assert.assertEquals("{\"1\":\"2\",\"2\":3}", JSONUtils.getNodeString("{\"bar\": {\"1\":\"2\",\"2\":3}}", "bar"));
     }
     
     @Test