package com.pz.common; import com.fasterxml.jackson.annotation.JsonInclude.Include; import com.fasterxml.jackson.core.JsonProcessingException; import com.fasterxml.jackson.databind.JavaType; import com.fasterxml.jackson.databind.JsonNode; import com.fasterxml.jackson.databind.ObjectMapper; import java.io.IOException; import java.util.List; import java.util.Map; /** * json 相关格式化 */ public class JsonUtils { // 定义jackson对象 private static ObjectMapper MAPPER = new ObjectMapper(); { MAPPER.setSerializationInclusion(Include.ALWAYS); } /** * 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; } public static JsonNode stringToJsonNode(String data) { try { JsonNode jsonNode = MAPPER.readTree(data); return jsonNode; } catch (IOException e) { // TODO Auto-generated catch block 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 * @throws Exception */ public static <T> T objectToPojo(Object jsonData, Class<T> beanType) throws Exception { T t = MAPPER.readValue(MAPPER.writeValueAsString(jsonData), beanType); return t; } /** * 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 * @throws Exception */ public static <T> T jsonToPojo(String jsonData, Class<T> beanType) throws Exception { T t = MAPPER.readValue(jsonData, beanType); return t; } /** * 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; } /** * 将object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> objectToList(Object jsonData, Class<T> beanType) { JavaType javaType = MAPPER.getTypeFactory().constructParametricType(List.class, beanType); try { List<T> list = MAPPER.readValue(MAPPER.writeValueAsString(jsonData), javaType); return list; } catch (Exception e) { e.printStackTrace(); } return null; } /** * 将JSON数据转换成Map * @param jsonData * @return */ public static Map<String,Object> jsonToMap(String jsonData) { try { Map map = MAPPER.readValue(jsonData, Map.class); return map; } catch (Exception e) { e.printStackTrace(); } return null; } }