package cn.huge.gateway.utils;
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import com.fasterxml.jackson.annotation.JsonInclude;
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import com.fasterxml.jackson.core.JsonProcessingException;
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import com.fasterxml.jackson.core.type.TypeReference;
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import com.fasterxml.jackson.databind.DeserializationFeature;
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import com.fasterxml.jackson.databind.JavaType;
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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 com.fasterxml.jackson.databind.util.JSONPObject;
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import org.apache.commons.lang3.StringUtils;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import java.io.IOException;
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/**
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* @title: JSON工具类
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* @description: JSON工具类
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* @company: hugeinfo
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* @author: liyj
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* @time: 2021-11-05 16:51:48
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* @version: 1.0.0
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*/
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public class JsonMapper {
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private static Logger logger = LoggerFactory.getLogger(JsonMapper.class);
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private ObjectMapper mapper;
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/**
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* 构造函数
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*/
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public JsonMapper() {
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this(null);
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}
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/**
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* 构造函数
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* @param include
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*/
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public JsonMapper(JsonInclude.Include include) {
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this.mapper = new ObjectMapper();
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if (include != null) {
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this.mapper.setSerializationInclusion(include);
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}
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this.mapper.disable(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES);
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}
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/**
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* 创建非空JsonMapper
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* @return JsonMapper
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*/
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public static JsonMapper nonEmptyMapper() {
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return new JsonMapper(JsonInclude.Include.NON_EMPTY);
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}
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/**
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* 创建非默认JsonMapper
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* @return JsonMapper
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*/
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public static JsonMapper nonDefaultMapper() {
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return new JsonMapper(JsonInclude.Include.NON_DEFAULT);
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}
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/**
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* 对象转json字符串
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* @param object 对象
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* @return String
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*/
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public String toJson(Object object) {
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try
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{
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return this.mapper.writeValueAsString(object);
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} catch (IOException e) {
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logger.warn("write to json string error:" + object, e);
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}return null;
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}
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/**
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* json字符串转对象
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* @param jsonString json字符串
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* @param clazz 类
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* @param <T> 对象
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* @return T
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*/
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public <T> T fromJson(String jsonString, Class<T> clazz) {
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if (StringUtils.isEmpty(jsonString)) {
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return null;
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}
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try
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{
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return this.mapper.readValue(jsonString, clazz);
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} catch (IOException e) {
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logger.warn("parse json string error:" + jsonString, e);
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}return null;
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}
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/**
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* json字符串转对象
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* @param jsonString json字符串
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* @param type 类型
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* @param <T> 对象
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* @return T
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*/
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public <T> T fromJson(String jsonString, TypeReference<T> type) {
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if (StringUtils.isEmpty(jsonString)) {
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return null;
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}
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try
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{
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return this.mapper.readValue(jsonString, type);
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} catch (IOException e) {
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logger.warn("parse json string error:" + jsonString, e);
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}return null;
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}
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/**
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* json字符串转对象
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* @param jsonString json字符串
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* @param javaType java类型
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* @param <T> 对象
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* @return T
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*/
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public <T> T fromJson(String jsonString, JavaType javaType) {
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if (StringUtils.isEmpty(jsonString)) {
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return null;
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}
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try
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{
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return this.mapper.readValue(jsonString, javaType);
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} catch (IOException e) {
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logger.warn("parse json string error:" + jsonString, e);
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}return null;
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}
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/**
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* 创建数组类型
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* @param collectionClass 数组类型
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* @param elementClasses 对象类
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* @return JavaType
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*/
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public JavaType createCollectionType(Class<?> collectionClass, Class<?>[] elementClasses) {
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return this.mapper.getTypeFactory().constructParametricType(collectionClass, elementClasses);
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}
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/**
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* 更新
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* @param jsonString json字符串
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* @param object 对象
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* @return T
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*/
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public <T> T update(String jsonString, T object) {
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try
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{
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return this.mapper.readerForUpdating(object).readValue(jsonString);
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} catch (JsonProcessingException e) {
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logger.warn("update json string:" + jsonString + " to object:" + object + " error.", e);
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} catch (IOException e) {
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logger.warn("update json string:" + jsonString + " to object:" + object + " error.", e);
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}
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return null;
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}
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/**
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* 转JsonP
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* @param functionName 函数名
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* @param object 对象
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* @return String
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*/
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public String toJsonP(String functionName, Object object) {
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return toJson(new JSONPObject(functionName, object));
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}
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/**
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* 转字符串
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*/
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public void enableEnumUseToString() {
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this.mapper.enable(SerializationFeature.WRITE_ENUMS_USING_TO_STRING);
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this.mapper.enable(DeserializationFeature.READ_ENUMS_USING_TO_STRING);
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}
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/**
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* 获取ObjectMapper
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* @return ObjectMapper
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*/
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public ObjectMapper getMapper() {
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return this.mapper;
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}
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}
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/**
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* -------------------_ooOoo_-------------------
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* ------------------o8888888o------------------
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* ------------------88" . "88------------------
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* ------------------(| -_- |)------------------
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* ------------------O\ = /O------------------
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* ---------------____/`---'\____---------------
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* -------------.' \\| |// `.-------------
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* ------------/ \\||| : |||// \------------
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* -----------/ _||||| -:- |||||- \-----------
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* -----------| | \\\ - /// | |-----------
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* -----------| \_| ''\---/'' | |-----------
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* -----------\ .-\__ `-` ___/-. /-----------
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* ---------___`. .' /--.--\ `. . __----------
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* ------."" '< `.___\_<|>_/___.' >'"".-------
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* -----| | : `- \`.;`\ _ /`;.`/ - ` : | |-----
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* -----\ \ `-. \_ __\ /__ _/ .-` / /-----
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* ======`-.____`-.___\_____/___.-`____.-'======
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* -------------------`=---='
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* ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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* ---------佛祖保佑---hugeinfo---永无BUG----------
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*/
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