### Question:
WxMaCodeSubmitAuditRequest implements Serializable { public String toJson() { return WxMaGsonBuilder.create().toJson(this); }  String toJson();  }### Answer:
@Test public void testToJson() { WxMaCodeSubmitAuditRequest request = WxMaCodeSubmitAuditRequest .builder() .itemList(Arrays.asList( WxMaCategory .builder() .address("pages/logs/logs") .tag("工具 效率") .firstClass("工具") .firstId(287L) .secondClass("效率") .secondId(616L) .title("日志") .build() )).build(); System.out.println(request.toJson()); }