使用反射对实体类赋值

JSON字符串

{
  "data":{
	  "PD01":{
		  "KEY1":"1",
		  "KEY2":"2",
		  "KEY3":"3"
	  },
	  "PD02":{
		  "KEY4":"4",
		  "KEY5":"5"
	  },
	  "PD03":{
		  "KEY6":"6"
	  }
}
}

实体类

@Data
public class ReflectionObj {

    private String KEY1;
    private String KEY3;
    private String KEY4;
    private String KEY6;
    private String KEY7;

}

关键步骤

1.遍历json字符串
String jsonkey : jsonObject.keySet()
2.获取实体类字段
Field field = reflectionclazz.getDeclaredField(jsonkey);
3.赋值
field.set(reflectionObj,jsonObject.getString(jsonkey));

参考demo

public class Reflection {

    public static void main(String[] args) throws IllegalAccessException, InstantiationException {
        JSONObject jsonObject = JSON.parseObject("{\"data\":{\"PD01\":{\"KEY1\":\"1\",\"KEY2\":\"2\",\"KEY3\":\"3\"},\"PD02\":{\"KEY4\":\"4\",\"KEY5\":\"5\"},\"PD03\":{\"KEY6\":\"6\"}}}");
        Class reflectionclazz = ReflectionObj.class;
        Object reflectionObj = reflectionclazz.newInstance();
        Reflection reflection = new Reflection();

        if(jsonObject.containsKey("data")){
            JSONObject dataJson = jsonObject.getJSONObject("data");
            if(dataJson.containsKey("PD01")){
                reflection.savedata(reflectionclazz,reflectionObj,dataJson,"PD01");
            }
            if(dataJson.containsKey("PD02")){
                reflection.savedata(reflectionclazz,reflectionObj,dataJson,"PD02");
            }
            if(dataJson.containsKey("PD03")){
                reflection.savedata(reflectionclazz,reflectionObj,dataJson,"PD03");
            }
            System.out.println(JSONArray.toJSONString(reflectionObj));
        }


        }
    public void savedata(Class reflectionclazz,Object reflectionObj,JSONObject dataJson,String key) {
        JSONObject jsonObject = dataJson.getJSONObject(key);
        for (String jsonkey : jsonObject.keySet()) {
            try {
                Field field = reflectionclazz.getDeclaredField(jsonkey);
                field.setAccessible(true);
                field.set(reflectionObj,jsonObject.getString(jsonkey));
            } catch (Exception e) {
                continue;
            }
        }
    }

}

打印结果

{"kEY1":"1","kEY3":"3","kEY4":"4","kEY6":"6"}