add body

hutool-json/src/test/java/cn/hutool/json/IssueI1H2VN.java

@@ -0,0 +1,40 @@
+package cn.hutool.json;
+
+import lombok.Data;
+import org.junit.Assert;
+import org.junit.Test;
+
+import java.util.List;
+
+/**
+ * 测试同一对象作为对象的字段是否会有null的问题，
+ * 此问题原来出在BeanCopier中，判断循环引用使用了equals，并不严谨。
+ * 修复后使用==判断循环引用。
+ */
+public class IssueI1H2VN {
+
+	@Test
+	public void toBeanTest() {
+		String jsonStr = "{'conditionsVo':[{'column':'StockNo','value':'abc','type':'='},{'column':'CheckIncoming','value':'1','type':'='}]," +
+				"'queryVo':{'conditionsVo':[{'column':'StockNo','value':'abc','type':'='},{'column':'CheckIncoming','value':'1','type':'='}],'queryVo':null}}";
+		QueryVo vo = JSONUtil.toBean(jsonStr, QueryVo.class);
+		Assert.assertEquals(2, vo.getConditionsVo().size());
+		final QueryVo subVo = vo.getQueryVo();
+		Assert.assertNotNull(subVo);
+		Assert.assertEquals(2, subVo.getConditionsVo().size());
+		Assert.assertNull(subVo.getQueryVo());
+	}
+
+	@Data
+	public static class ConditionVo {
+		private String column;
+		private String value;
+		private String type;
+	}
+
+	@Data
+	public static class QueryVo {
+		private List<ConditionVo> conditionsVo;
+		private QueryVo queryVo;
+	}
+}