添加 serialVersionUID

src/main/java/com/jfinal/kit/Kv.java

@@ -27,9 +27,11 @@ import com.jfinal.json.Json;
  *    Kv para = Kv.by("id", 123);
  *    User user = user.findFirst(getSqlPara("find", para));
  */
-@SuppressWarnings({"serial", "rawtypes", "unchecked"})
+@SuppressWarnings({"rawtypes", "unchecked"})
 public class Kv extends HashMap {
 	
+	private static final long serialVersionUID = -6086130186405306902L;
+	
 	public Kv() {
 	}
 	

src/main/java/com/jfinal/kit/Okv.java

@@ -30,9 +30,11 @@ import com.jfinal.json.Json;
  *    Okv para = Okv.by("id", 123);
  *    User user = user.findFirst(getSqlPara("find", para));
  */
-@SuppressWarnings({"serial", "rawtypes", "unchecked"})
+@SuppressWarnings({"rawtypes", "unchecked"})
 public class Okv extends LinkedHashMap {
 	
+	private static final long serialVersionUID = 485147547719011382L;
+	
 	public Okv() {
 	}
 	

src/main/java/com/jfinal/kit/Ret.java

@@ -57,9 +57,11 @@ import com.jfinal.json.Json;
  *   
  * </pre>
  */
-@SuppressWarnings({"serial", "rawtypes", "unchecked"})
+@SuppressWarnings({"rawtypes", "unchecked"})
 public class Ret extends HashMap {
 	
+	private static final long serialVersionUID = -3021472182023759198L;
+	
 	private static final String STATE = "state";
 	private static final String STATE_OK = "ok";
 	private static final String STATE_FAIL = "fail";