fic null point bug

hutool-json/src/test/java/cn/hutool/json/IssueI1F8M2.java

@@ -0,0 +1,38 @@
+package cn.hutool.json;
+
+import lombok.Data;
+import org.junit.Assert;
+import org.junit.Test;
+
+import java.time.LocalDateTime;
+
+/**
+ * https://gitee.com/loolly/dashboard/issues?id=I1F8M2
+ */
+public class IssueI1F8M2 {
+	@Test
+	public void toBeanTest() {
+		String jsonStr = "{\"eventType\":\"fee\",\"fwdAlertingTime\":\"2020-04-22 16:34:13\",\"fwdAnswerTime\":\"\"}";
+		Param param = JSONUtil.toBean(jsonStr, Param.class);
+		Assert.assertEquals("2020-04-22T16:34:13", param.getFwdAlertingTime().toString());
+		Assert.assertNull(param.getFwdAnswerTime());
+	}
+
+	// Param类的字段
+	@Data
+	static class Param {
+		/**
+		 * fee表示话单事件
+		 */
+		private String eventType;
+		/**
+		 * 转接呼叫后振铃时间
+		 */
+		private LocalDateTime fwdAlertingTime;
+		/**
+		 * 转接呼叫后应答时间
+		 */
+		private LocalDateTime fwdAnswerTime;
+
+	}
+}