Jackson反序列化 Y/N

Json表示布尔的标准形式是true和false，但在项目中也有使用0/1，或者Y/N来表示的。这时候就需要我们将其转换为布尔类型。

package utils;

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

import java.io.IOException;

public class JsonCustomDeserializer extends JsonDeserializer<Boolean> {

	@Override
	public Boolean deserialize(JsonParser jsonParser, DeserializationContext deserializationContext) throws IOException, JsonProcessingException {

		JsonToken currentToken = jsonParser.getCurrentToken();

		if (currentToken.equals(JsonToken.VALUE_STRING)) {
			String text = jsonParser.getText();

			if ("X".equals(text)) {
				return Boolean.TRUE;
			} else if ("".equals(text)) {
				return Boolean.FALSE;
			}

			throw deserializationContext.weirdStringException(text, Boolean.class, "Only X or null values supported.");
		} else if (currentToken.equals(JsonToken.VALUE_NULL)) {
			return Boolean.FALSE;
		}

		return deserializationContext.reportBadDefinition(Boolean.class, "Can't parse boolean value: " + jsonParser.getText());
	}

}

使用

@TableField("LVORM")
@JsonProperty(value = "LVORM", access = JsonProperty.Access.WRITE_ONLY)
@JsonDeserialize(using = JsonCustomDeserializer.class)
private boolean lvorm;