add test

hutool-json/src/test/java/cn/hutool/json/Issue2564Test.java

@@ -0,0 +1,24 @@
+package cn.hutool.json;
+
+import lombok.Getter;
+import lombok.Setter;
+import org.junit.Assert;
+import org.junit.Test;
+
+public class Issue2564Test {
+
+	/**
+	 * 实力类 没有get set方法，不能被认为是一个bean
+	 */
+	@Test()
+	public void emptyToBeanTest(){
+		final String x = "{}";
+		final A a = JSONUtil.toBean(x, JSONConfig.of().setIgnoreError(true), A.class);
+		Assert.assertNull(a);
+	}
+
+	@Getter
+	@Setter
+	public static class A{
+	}
+}