jackjson jar包

package test; import com.fasterxml.jackson.databind.ObjectMapper; /** * <p> * Jackson宸ュ叿绫? * </p> * * @author 鐢板師 * */ public class JSONUtil { private static ObjectMapper mapper; /** * 鑾峰彇ObjectMapper瀹炰緥 * * @param createNew * 鏂瑰紡锛歵rue锛屾柊瀹炰緥锛沠alse,瀛樺湪鐨刴apper瀹炰緥 * @return */ public static synchronized ObjectMapper getMapperInstance(boolean createNew) { if (createNew) { return new ObjectMapper(); } else if (mapper == null) { mapper = new ObjectMapper(); } return mapper; } /** * 灏唈ava瀵硅薄杞崲鎴恓son瀛楃涓? * * @param obj * 鍑嗗杞崲鐨勫璞? * @return json瀛楃涓? * @throws Exception */ public static String beanToJson(Object obj) throws Exception { try { ObjectMapper objectMapper = getMapperInstance(false); String json = objectMapper.writeValueAsString(obj); return json; } catch (Exception e) { throw new Exception(e.getMessage()); } } /** * 灏唈ava瀵硅薄杞崲鎴恓son瀛楃涓? * * @param obj * 鍑嗗杞崲鐨勫璞? * @param createNew * ObjectMapper瀹炰緥鏂瑰紡:true锛屾柊瀹炰緥;false,瀛樺湪鐨刴apper瀹炰緥 * @return json瀛楃涓? * @throws Exception */ public static String beanToJson(Object obj, Boolean createNew) throws Exception { try { ObjectMapper objectMapper = getMapperInstance(createNew); String json = objectMapper.writeValueAsString(obj); return json; } catch (Exception e) { throw new Exception(e.getMessage()); } } /** * 灏唈son瀛楃涓茶浆鎹㈡垚java瀵硅薄 * * @param json * 鍑嗗杞崲鐨刯son瀛楃涓? * @param cls * 鍑嗗杞崲鐨勭被 * @return * @throws Exception */ public static Object jsonToBean(String json, Class<?> cls) throws Exception { try { ObjectMapper objectMapper = getMapperInstance(false); Object vo = objectMapper.readValue(json, cls); return vo; } catch (Exception e) { throw new Exception(e.getMessage()); } } /** * 灏唈son瀛楃涓茶浆鎹㈡垚java瀵硅薄 * * @param json * 鍑嗗杞崲鐨刯son瀛楃涓? * @param cls * 鍑嗗杞崲鐨勭被 * @param createNew * ObjectMapper瀹炰緥鏂瑰紡:true锛屾柊瀹炰緥;false,瀛樺湪鐨刴apper瀹炰緥 * @return * @throws Exception */ public static Object jsonToBean(String json, Class<?> cls, Boolean createNew) throws Exception { try { ObjectMapper objectMapper = getMapperInstance(createNew); Object vo = objectMapper.readValue(json, cls); return vo; } catch (Exception e) { throw new Exception(e.getMessage()); } } }