fix code

hutool-json/src/test/java/cn/hutool/json/IssueI50EGGTest.java

@@ -0,0 +1,24 @@
+package cn.hutool.json;
+
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import org.junit.Assert;
+import org.junit.Test;
+
+public class IssueI50EGGTest {
+
+	@Test
+	public void toBeanTest(){
+		String data = "{\"return_code\": 1, \"return_msg\": \"成功\", \"return_data\" : null}";
+		final ApiResult<?> apiResult = JSONUtil.toBean(data, JSONConfig.create().setIgnoreCase(true), ApiResult.class);
+		Assert.assertEquals(1, apiResult.getReturn_code());
+	}
+
+	@Data
+	@AllArgsConstructor
+	static class ApiResult<T>{
+		private long Return_code;
+		private String Return_msg;
+		private T Return_data;
+	}
+}