package com.nq.utils.redis;
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import org.apache.commons.lang3.StringUtils;
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import org.codehaus.jackson.map.DeserializationConfig;
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import org.codehaus.jackson.map.ObjectMapper;
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import org.codehaus.jackson.map.SerializationConfig;
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import org.codehaus.jackson.map.annotate.JsonSerialize;
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import org.codehaus.jackson.type.JavaType;
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import org.codehaus.jackson.type.TypeReference;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import java.text.SimpleDateFormat;
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public class JsonUtil {
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private static final Logger log = LoggerFactory.getLogger(JsonUtil.class);
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private static ObjectMapper objectMapper = new ObjectMapper();
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static {
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objectMapper.setSerializationInclusion(JsonSerialize.Inclusion.ALWAYS);
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objectMapper.configure(SerializationConfig.Feature.WRITE_DATES_AS_TIMESTAMPS, false);
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objectMapper.configure(SerializationConfig.Feature.FAIL_ON_EMPTY_BEANS, false);
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objectMapper.setDateFormat(new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"));
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objectMapper.configure(DeserializationConfig.Feature.FAIL_ON_UNKNOWN_PROPERTIES, false);
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}
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public static <T> String obj2String(T obj) {
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if (obj == null) {
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return null;
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}
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try {
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return (obj instanceof String) ? (String) obj : objectMapper.writeValueAsString(obj);
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} catch (Exception e) {
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log.warn("XC JsonUtil Parse obj to string error ", e);
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return null;
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}
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}
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public static <T> String obj2StringPretty(T obj) {
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if (obj == null) {
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return null;
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}
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try {
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return (obj instanceof String) ? (String) obj : objectMapper
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.writerWithDefaultPrettyPrinter().writeValueAsString(obj);
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} catch (Exception e) {
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log.warn("XC JsonUtil Parse obj to string error ", e);
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return null;
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}
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}
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public static <T> T string2Obj(String str, Class<T> clazz) {
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if (StringUtils.isEmpty(str) || clazz == null) {
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return null;
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}
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try {
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return (T) (clazz.equals(String.class) ? str : objectMapper.readValue(str, clazz));
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} catch (Exception e) {
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log.warn("XC 1 JsonUtil Parse string to obj error", e);
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return null;
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}
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}
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public static <T> T string2Obj(String str, TypeReference<T> typeReference) {
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if (StringUtils.isEmpty(str) || typeReference == null) {
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return null;
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}
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try {
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return (T) (typeReference.getType().equals(String.class) ? str : objectMapper
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.readValue(str, typeReference));
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} catch (Exception e) {
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log.warn("XC 2 JsonUtil Parse string to obj error", e);
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return null;
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}
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}
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public static <T> T string2Obj(String str, Class<?> collectionClass, Class... elementClasses) {
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JavaType javaType = objectMapper.getTypeFactory().constructParametricType(collectionClass, elementClasses);
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try {
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return (T) objectMapper.readValue(str, javaType);
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} catch (Exception e) {
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log.warn("XC 3 JsonUtil Parse string to obj error", e);
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return null;
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}
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}
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public static void main(String[] args) {
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}
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}
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