package com.cloudroam.util;
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import com.fasterxml.jackson.annotation.JsonInclude;
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import com.fasterxml.jackson.core.JsonParser;
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import com.fasterxml.jackson.core.JsonProcessingException;
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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.datatype.jsr310.JavaTimeModule;
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import lombok.extern.slf4j.Slf4j;
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import java.text.SimpleDateFormat;
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import java.util.List;
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/**
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*
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*
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* @Description
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* @Author
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* @Remark
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* @Version 1.0
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**/
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@Slf4j
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public class JsonUtil {
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private static final ObjectMapper mapper = new ObjectMapper();
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static {
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// 注册 JavaTimeModule 以支持 Java 8 日期/时间 API
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mapper.registerModule(new JavaTimeModule());
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//设置可用单引号
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mapper.configure(JsonParser.Feature.ALLOW_SINGLE_QUOTES, true);
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//序列化的时候序列对象的所有属性
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mapper.setSerializationInclusion(JsonInclude.Include.ALWAYS);
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//反序列化的时候如果多了其他属性,不抛出异常
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mapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
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//如果是空对象的时候,不抛异常
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mapper.configure(SerializationFeature.FAIL_ON_EMPTY_BEANS, false);
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//取消时间的转化格式,默认是时间戳,可以取消,同时需要设置要表现的时间格式
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mapper.configure(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS, false);
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mapper.setDateFormat(new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"));
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}
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/**
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* 对象转为Json字符串
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* @param data
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* @return
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*/
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public static String obj2Json(Object obj) {
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String jsonStr = null;
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try {
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jsonStr = mapper.writeValueAsString(obj);
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} catch (JsonProcessingException e) {
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//e.printStackTrace();
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log.error("json格式化异常:{}",e);
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}
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return jsonStr;
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}
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/**
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* json字符串转为对象
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* @param str
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* @param valueType
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* @return
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*/
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public static <T> T json2Obj(String jsonStr, Class<T> beanType) {
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T obj = null;
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try {
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obj = mapper.readValue(jsonStr, beanType);
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} catch (Exception e){
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//e.printStackTrace();
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log.error("json格式化异常:{}",e);
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}
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return obj;
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}
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/**
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* json数据转换成pojo对象list
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* @param jsonData
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* @param beanType
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* @return
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*/
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public static <T> List<T> json2List(String jsonData, Class<T> beanType) {
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JavaType javaType = mapper.getTypeFactory().constructParametricType(List.class, beanType);
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try {
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List<T> list = mapper.readValue(jsonData, javaType);
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return list;
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} catch (Exception e) {
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//e.printStackTrace();
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log.error("json格式化异常:{}",e);
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}
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return null;
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}
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/**
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* 对象转为byte数组
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* @param data
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* @return
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*/
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public static byte[] obj2Bytes(Object obj) {
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byte[] byteArr = null;
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try {
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byteArr = mapper.writeValueAsBytes(obj);
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} catch (JsonProcessingException e) {
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//e.printStackTrace();
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log.error("json格式化异常:{}",e);
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}
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return byteArr;
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}
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/**
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* byte数组转为对象
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* @param byteArr
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* @param valueType
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* @return
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*/
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public static <T> T bytes2Obj(byte[] byteArr, Class<T> beanType) {
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T obj = null;
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try {
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obj = mapper.readValue(byteArr, beanType);
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} catch (Exception e) {
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//e.printStackTrace();
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log.error("json格式化异常:{}",e);
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}
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return obj;
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}
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}
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