Try to fix

Author: zhangrongfan

mybatis-boost-core/src/main/java/cn/mybatisboost/json/JsonResultSetsHandler.java

@@ -23,7 +23,6 @@ public class JsonResultSetsHandler implements Interceptor {
     @Override
     public Object intercept(Invocation invocation) throws Throwable {
         List<?> proceed = (List<?>) invocation.proceed();
-        System.out.println("4790174127041207412701401:" + proceed);
         if (proceed.isEmpty()) return proceed;
 
         Class<?> type = proceed.get(0).getClass();

mybatis-boost-core/src/main/java/cn/mybatisboost/json/JsonTypeHandler.java

@@ -21,11 +21,7 @@ public class JsonTypeHandler extends BaseTypeHandler<Property<?>> {
     public void setNonNullParameter(PreparedStatement ps, int i, Property<?> parameter, JdbcType jdbcType)
             throws SQLException {
         try {
-            if (parameter.isPresent()) {
-                ps.setString(i, objectMapper.writeValueAsString(parameter.get()));
-            } else {
-                ps.setObject(i, null);
-            }
+            ps.setString(i, objectMapper.writeValueAsString(parameter.get()));
         } catch (JsonProcessingException e) {
             throw new RuntimeException(e);
         }

mybatis-boost-test/src/main/java/cn/mybatisboost/test/Project.java

@@ -10,7 +10,7 @@ public class Project {
     private String license;
     private String scm;
     private String developer;
-    private Property<Website> website = Property.empty();
+    private Property<Website> website;
 
     public Project() {
     }