033-JsonUtils 工具类模板

package cn.e3mall.common.utils;import java.util.List;import com.fasterxml.jackson.core.JsonProcessingException;import com.fasterxml.jackson.databind.JavaType;import com.fasterxml.jackson.databind.JsonNode;import com.fasterxml.jackson.databind.ObjectMapper;/** * ?* @title:JsonUtils * @description:json转换工具类，使用的是jackson * @author jepson * @date 2018年5月29日 下午9:16:16 * @version 1.0 */public class JsonUtils { ???// 定义jackson对象 ???private static final ObjectMapper MAPPER = new ObjectMapper(); ???/** ????* 将对象转换成json字符串。 ????* <p>Title: pojoToJson</p> ????* <p>Description: </p> ????* @param data ????* @return ????*/ ???public static String objectToJson(Object data) { ???????try { ???????????String string = MAPPER.writeValueAsString(data); ???????????return string; ???????} catch (JsonProcessingException e) { ???????????e.printStackTrace(); ???????} ???????return null; ???} ???????/** ????* 将json结果集转化为对象 ????* ?????* @param jsonData json数据 ????* @param clazz 对象中的object类型 ????* @return ????*/ ???public static <T> T jsonToPojo(String jsonData, Class<T> beanType) { ???????try { ???????????T t = MAPPER.readValue(jsonData, beanType); ???????????return t; ???????} catch (Exception e) { ???????????e.printStackTrace(); ???????} ???????return null; ???} ???????/** ????* 将json数据转换成pojo对象list ????* <p>Title: jsonToList</p> ????* <p>Description: </p> ????* @param jsonData ????* @param beanType ????* @return ????*/ ???public static <T>List<T> jsonToList(String jsonData, Class<T> beanType) { ???????JavaType javaType = MAPPER.getTypeFactory().constructParametricType(List.class, beanType); ???????try { ???????????List<T> list = MAPPER.readValue(jsonData, javaType); ???????????return list; ???????} catch (Exception e) { ???????????e.printStackTrace(); ???????} ???????????????return null; ???} ???}