jsonutil java_JsonUtil.java

最新推荐文章于 2025-01-15 09:52:21 发布

ruigang.wang

最新推荐文章于 2025-01-15 09:52:21 发布

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文章标签： jsonutil java

本文链接：https://blog.youkuaiyun.com/weixin_31572189/article/details/114184584

该博客展示了Java中JSON工具类JsonUtil的代码实现。包含JSON串与Java泛型对象、Java对象的相互转换方法，以及验证字符串是否为JSON格式的方法。使用了ObjectMapper进行操作，处理过程中对异常进行了日志记录。

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packagecom.xxx.common.util;importjava.io.IOException;importorg.apache.commons.lang.StringUtils;importorg.codehaus.jackson.JsonParseException;importorg.codehaus.jackson.JsonParser;importorg.codehaus.jackson.map.DeserializationConfig;importorg.codehaus.jackson.map.ObjectMapper;importorg.codehaus.jackson.map.SerializationConfig.Feature;importorg.codehaus.jackson.map.annotate.JsonSerialize.Inclusion;importorg.codehaus.jackson.map.ser.StdSerializerProvider;importorg.codehaus.jackson.type.TypeReference;importorg.slf4j.Logger;importorg.slf4j.LoggerFactory;/*** JSON utility

*@authorbc

**/

public final classJsonUtil {/*** log*/

private static final Logger LOGGER = LoggerFactory.getLogger(JsonUtil.class);/****/

privateJsonUtil() {

}/****/

static finalObjectMapper OBJECT_MAPPER;static{

StdSerializerProvider sp= newStdSerializerProvider();

OBJECT_MAPPER= new ObjectMapper(null, sp, null);

OBJECT_MAPPER.getSerializationConfig().withSerializationInclusion(Inclusion.NON_NULL);

OBJECT_MAPPER.getSerializationConfig().with(Feature.SORT_PROPERTIES_ALPHABETICALLY);

OBJECT_MAPPER.configure(DeserializationConfig.Feature.FAIL_ON_UNKNOWN_PROPERTIES,false);

}public staticObjectMapper getObjectMapper() {returnOBJECT_MAPPER;

}/*** JSON串转换为Java泛型对象，可以是各种类型

*@param return type

*@paramjsonString JSON

*@paramtr TypeReference,例如: new TypeReference< List >(){}

*@returnList对象列表*/@SuppressWarnings("unchecked")public static T json2GenericObject(String jsonString, TypeReferencetr) {if (!StringUtils.isBlank(jsonString)) {try{return(T) OBJECT_MAPPER.readValue(jsonString, tr);

}catch(Exception e) {

LOGGER.warn("json error:" +e.getMessage());

}

}return null;

}/*** Java对象转JSON字符串

*@paramobject Java对象，可以是对象，数组，List,Map等

*@returnJSON 字符串*/

public staticString toJson(Object object) {try{returnOBJECT_MAPPER.writeValueAsString(object);

}catch(Exception e) {

LOGGER.warn("json error:" +e.getMessage());

}return null;

}/*** JSON字符串转Java对象

*@paramjsonString JSON

*@paramc class

*@return

public static Object json2Object(String jsonString, Class>c) {if (!StringUtils.isBlank(jsonString)) {try{returnOBJECT_MAPPER.readValue(jsonString, c);

}catch(Exception e) {

LOGGER.warn("json error:" +e.getMessage());

}

}return null;

}/*** 验证字符串是否为json格式

*@paramjson

*@return

public static boolean isValidJson(finalString json) {boolean valid = false;try{final JsonParser parser = newObjectMapper().getJsonFactory()

.createJsonParser(json);while (parser.nextToken() != null) {

}

valid= true;

}catch(JsonParseException jpe) {returnvalid;