爱站程序员基地JsonUtils工具类，用于解析json为对象，以及将对象写为json格式
import com.fasterxml.jackson.core.JsonProcessingException;import com.fasterxml.jackson.core.type.TypeReference;import com.fasterxml.jackson.databind.ObjectMapper;import org.slf4j.Logger;import org.slf4j.LoggerFactory;import org.springframework.lang.Nullable;import java.io.IOException;import java.util.List;import java.util.Map;/*** @author: HuYi.Zhang* @create: 2018-04-24 17:20**/public class JsonUtils {public static final ObjectMapper mapper = new ObjectMapper();private static final Logger logger = LoggerFactory.getLogger(JsonUtils.class);@Nullablepublic static String serialize(Object obj) {if (obj == null) {return null;}if (obj.getClass() == String.class) {return (String) obj;}try {return mapper.writeValueAsString(obj);} catch (JsonProcessingException e) {logger.error(\"json序列化出错：\" + obj, e);return null;}}@Nullablepublic static <T> T parse(String json, Class<T> tClass) {try {return mapper.readValue(json, tClass);} catch (IOException e) {logger.error(\"json解析出错：\" + json, e);return null;}}@Nullablepublic static <E> List<E> parseList(String json, Class<E> eClass) {try {return mapper.readValue(json, mapper.getTypeFactory().constructCollectionType(List.class, eClass));} catch (IOException e) {logger.error(\"json解析出错：\" + json, e);return null;}}@Nullablepublic static <K, V> Map<K, V> parseMap(String json, Class<K> kClass, Class<V> vClass) {try {return mapper.readValue(json, mapper.getTypeFactory().constructMapType(Map.class, kClass, vClass));} catch (IOException e) {logger.error(\"json解析出错：\" + json, e);return null;}}@Nullablepublic static <T> T nativeRead(String json, TypeReference<T> type) {try {return mapper.readValue(json, type);} catch (IOException e) {logger.error(\"json解析出错：\" + json, e);return null;}}}
