package com.sandu.ximon.admin.utils;
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import com.fasterxml.jackson.databind.DeserializationFeature;
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import com.fasterxml.jackson.databind.ObjectMapper;
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import com.fasterxml.jackson.databind.SerializationFeature;
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import jdk.nashorn.internal.ir.ObjectNode;
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import java.io.IOException;
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public class JsonUtil {
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private static ObjectMapper objectMapper;
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static {
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objectMapper = new ObjectMapper();
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// 璁剧疆FAIL_ON_EMPTY_BEANS灞炴�э紝褰撳簭鍒楀寲绌哄璞′笉瑕佹姏寮傚父
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objectMapper.configure(SerializationFeature.FAIL_ON_EMPTY_BEANS, false);
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// 璁剧疆FAIL_ON_UNKNOWN_PROPERTIES灞炴�э紝褰揓SON瀛楃涓蹭腑瀛樺湪Java瀵硅薄娌℃湁鐨勫睘鎬э紝蹇界暐
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objectMapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
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}
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/**
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* Convert Object to JsonString
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*
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* @param jsonObj
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* @return
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*/
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public static String jsonObj2Sting(Object jsonObj) {
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String jsonString = null;
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try {
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jsonString = objectMapper.writeValueAsString(jsonObj);
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} catch (IOException e) {
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System.out.printf("pasre json Object[{}] to string failed.",jsonString);
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}
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return jsonString;
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}
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/**
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* Convert JsonString to Simple Object
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*
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* @param jsonString
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* @param cls
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* @return
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*/
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public static <T> T jsonString2SimpleObj(String jsonString, Class<T> cls) {
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T jsonObj = null;
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try {
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jsonObj = objectMapper.readValue(jsonString, cls);
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} catch (IOException e) {
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System.out.printf("pasre json Object[{}] to string failed.",jsonString);
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}
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return jsonObj;
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}
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/**
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* Method that will convert object to the ObjectNode.
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*
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* @param object
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* the source data; if null, will return null.
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* @return the ObjectNode data after converted.
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* @throws Exception
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*/
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public static <T> ObjectNode convertObject2ObjectNode(T object)
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throws Exception {
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if (null == object) {
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return null;
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}
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ObjectNode objectNode = null;
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if (object instanceof String) {
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objectNode = convertJsonStringToObject((String) object,
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ObjectNode.class);
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} else {
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objectNode = convertValue(object, ObjectNode.class);
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}
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return objectNode;
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}
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/**
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* Method that will convert the json string to destination by the type(cls).
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*
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* @param jsonString
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* the source json string; if null, will return null.
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* @param cls
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* the destination data type.
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* @return
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* @throws Exception
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*/
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public static <T> T convertJsonStringToObject(String jsonString,
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Class<T> cls) throws Exception {
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if (StringUtil.strIsNullOrEmpty(jsonString)) {
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return null;
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}
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try {
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T object = objectMapper.readValue(jsonString, cls);
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return object;
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} catch (Exception e) {
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throw new Exception(e);
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}
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}
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/**
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* Method that will convert from given value into instance of given value
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* type.
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*
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* @param fromValue
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* @param toValueType
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* @return
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* @throws Exception
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*/
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private static <T> T convertValue(Object fromValue, Class<T> toValueType)
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throws Exception {
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try {
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return objectMapper.convertValue(fromValue, toValueType);
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} catch (IllegalArgumentException e) {
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throw new Exception(e);
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}
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}
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}
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