<dependency>
<groupId>net.sf.json-lib</groupId>
<artifactId>json-lib</artifactId>
<version>2.4</version>
<classifier>jdk15</classifier>
</dependency>
MiniProgramPayDTO obj = new MiniProgramPayDTO();
RequestPayment obj2 = new RequestPayment();
obj.setPayData(obj2);
JSONObject json = JSONObject.fromObject(obj);
System.out.println(json);
}
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