import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.databind.DeserializationContext;
import com.fasterxml.jackson.databind.JsonDeserializer;

import java.io.IOException;

public class MultiFormatDateTimeDeserializer extends JsonDeserializer {

@Override
public String deserialize(JsonParser p, DeserializationContext ctxt) throws IOException {
    String text = p.getText().trim();
    // 补全时间
    if (text.matches("^\\d{4}-\\d{2}$")) { // yyyy-MM
        text += "-01 00:00:00";
    } else if (text.matches("^\\d{4}-\\d{2}-\\d{2}$")) { // yyyy-MM-dd
        text += " 00:00:00";
    } else if (text.matches("^\\d{4}-\\d{2}-\\d{2} \\d{2}$")) { // yyyy-MM-dd HH
        text += ":00:00";
    } else if (text.matches("^\\d{4}-\\d{2}-\\d{2} \\d{2}:\\d{2}$")) { // yyyy-MM-dd HH:mm
        text += ":00";
    }
    //DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss");
    return text;
}

}

字段添加注解
@JsonDeserialize(using = MultiFormatDateTimeDeserializer.class)