🎉 add new method of EntityUtil

src/main/java/utils/EntityUtil.java

@@ -1,7 +1,9 @@
 package utils;
 
 import java.lang.reflect.Field;
+import java.util.ArrayList;
 import java.util.HashMap;
+import java.util.List;
 import java.util.Map;
 
 public class EntityUtil {
@@ -19,4 +21,34 @@ public class EntityUtil {
         }
         return result;
     }
+
+    /**
+     * 获取实体类中所有不为空的字段名
+     */
+    public static List<String> findNotNullFields(Object obj) {
+        List<String> notNullFields = new ArrayList<>();
+        Class<?> clazz = obj.getClass();
+        for (Field field : clazz.getDeclaredFields()) {
+            field.setAccessible(true);
+            try {
+                Object value = field.get(obj);
+                if (value!= null) {
+                    notNullFields.add(field.getName());
+                }
+            } catch (IllegalAccessException e) {
+                e.printStackTrace();
+            }
+        }
+        return notNullFields;
+    }
+
+    /**
+     * 根据字段名获取值
+     */
+    public static Object getFieldValue(String fieldName, Object obj) throws Exception {
+        Class<?> clazz = obj.getClass();
+        Field field = clazz.getDeclaredField(fieldName);
+        field.setAccessible(true);
+        return field.get(obj);
+    }
 }