java处理JSON格式数据的通用类-分享
/**
?*?Copyright?(c)?linkwise?2007-2009?corporation.???*?All?rights?reserved
?*/
package?com.linghui.common.util;import?java.util.ArrayList;import?java.util.Date;import?java.util.HashMap;import?java.util.Iterator;import?java.util.List;import?java.util.Map;import?net.sf.json.JSONArray;import?net.sf.json.JSONObject;import?net.sf.json.JsonConfig;import?net.sf.json.util.CycleDetectionStrategy;import?com.linghui.common.util.DateUtil;import?com.linghui.common.util.jsonutil.DateJsonValueProcessor;/**?*?@author?</br>?<a?href="mailto:fx19800215@163.com">?robert.feng</a>?*?*/public?class?JsonUtil?{
????/**?????*?从一个JSON?对象字符格式中得到一个java对象?????*?@param?jsonString?????*?@param?pojoCalss?????*?@return
?????*/????public?static?Object?getObject4JsonString(String?jsonString,Class?pojoCalss){????????Object?pojo;????????JSONObject?jsonObject?=?JSONObject.fromObject(?jsonString?);??????????pojo?=?JSONObject.toBean(jsonObject,pojoCalss);????????return?pojo;????}????????????????/**?????*?从json?HASH表达式中获取一个map，改map支持嵌套功能?????*?@param?jsonString?????*?@return?????*/????public?static?Map?getMap4Json(String?jsonString){????????JSONObject?jsonObject?=?JSONObject.fromObject(?jsonString?);??????????Iterator??keyIter?=?jsonObject.keys();????????String?key;????????Object?value;????????Map?valueMap?=?new?HashMap();????????while(?keyIter.hasNext())????????{????????????key?=?(String)keyIter.next();????????????value?=?jsonObject.get(key);????????????valueMap.put(key,?value);????????}????????????????return?valueMap;????}????????????/**?????*?从json数组中得到相应java数组?????*?@param?jsonString?????*?@return?????*/????public?static?Object[]?getObjectArray4Json(String?jsonString){????????JSONArray?jsonArray?=?JSONArray.fromObject(jsonString);????????return?jsonArray.toArray();????????????}????????????/**?????*?从json对象集合表达式中得到一个java对象列表?????*?@param?jsonString?????*?@param?pojoClass?????*?@return?????*/????public?static?List?getList4Json(String?jsonString,?Class?pojoClass){????????????????JSONArray?jsonArray?=?JSONArray.fromObject(jsonString);????????JSONObject?jsonObject;????????Object?pojoValue;????????????????List?list?=?new?ArrayList();????????for?(?int?i?=?0?;?i<jsonArray.size();?i++){????????????????????????jsonObject?=?jsonArray.getJSONObject(i);????????????pojoValue?=?JSONObject.toBean(jsonObject,pojoClass);????????????list.add(pojoValue);????????????????????}????????return?list;????}????????/**?????*?从json数组中解析出java字符串数组?????*?@param?jsonString?????*?@return?????*/????public?static?String[]?getStringArray4Json(String?jsonString){????????????????JSONArray?jsonArray?=?JSONArray.fromObject(jsonString);????????String[]?stringArray?=?new?String[jsonArray.size()];????????for(?int?i?=?0?;?i<jsonArray.size()?;?i++?){????????????stringArray[i]?=?jsonArray.getString(i);????????????????????}????????????????return?stringArray;????}????????/**?????*?从json数组中解析出javaLong型对象数组?????*?@param?jsonString?????*?@return?????*/????public?static?Long[]?getLongArray4Json(String?jsonString){????????????????JSONArray?jsonArray?=?JSONArray.fromObject(jsonString);????????Long[]?longArray?=?new?Long[jsonArray.size()];????????for(?int?i?=?0?;?i<jsonArray.size()?;?i++?){????????????longArray[i]?=?jsonArray.getLong(i);????????????????????}????????return?longArray;????}????????/**?????*?从json数组中解析出java?Integer型对象数组?????*?@param?jsonString?????*?@return?????*/????public?static?Integer[]?getIntegerArray4Json(String?jsonString){????????????????JSONArray?jsonArray?=?JSONArray.fromObject(jsonString);????????Integer[]?integerArray?=?new?Integer[jsonArray.size()];????????for(?int?i?=?0?;?i<jsonArray.size()?;?i++?){????????????integerArray[i]?=?jsonArray.getInt(i);????????????????????}????????return?integerArray;????}????????/**?????*?从json数组中解析出java?Date?型对象数组，使用本方法必须保证?????*?@param?jsonString?????*?@return?????*/????public?static?Date[]?getDateArray4Json(String?jsonString,String?DataFormat){????????????????JSONArray?jsonArray?=?JSONArray.fromObject(jsonString);????????Date[]?dateArray?=?new?Date[jsonArray.size()];????????String?dateString;????????Date?date;????????????????for(?int?i?=?0?;?i<jsonArray.size()?;?i++?){????????????dateString?=?jsonArray.getString(i);????????????date?=?DateUtil.stringToDate(dateString,?DataFormat);????????????dateArray[i]?=?date;????????????????????}????????return?dateArray;????}????????/**?????*?从json数组中解析出java?Integer型对象数组?????*?@param?jsonString?????*?@return?????*/????public?static?Double[]?getDoubleArray4Json(String?jsonString){????????????????JSONArray?jsonArray?=?JSONArray.fromObject(jsonString);????????Double[]?doubleArray?=?new?Double[jsonArray.size()];????????for(?int?i?=?0?;?i<jsonArray.size()?;?i++?){????????????doubleArray[i]?=?jsonArray.getDouble(i);????????????????????}????????return?doubleArray;????}????????????/**?????*?将java对象转换成json字符串?????*?@param?javaObj?????*?@return?????*/????public?static?String?getJsonString4JavaPOJO(Object?javaObj){????????????????JSONObject?json;????????json?=?JSONObject.fromObject(javaObj);????????return?json.toString();????????????}????????????????????/**?????*?将java对象转换成json字符串,并设定日期格式?????*?@param?javaObj?????*?@param?dataFormat?????*?@return?????*/????public?static?String?getJsonString4JavaPOJO(Object?javaObj?,?String?dataFormat){????????????????JSONObject?json;????????JsonConfig?jsonConfig?=?configJson(dataFormat);????????json?=?JSONObject.fromObject(javaObj,jsonConfig);????????return?json.toString();????????????????????}????????????????/**?????*?@param?args?????*/????public?static?void?main(String[]?args)?{????????//?TODO?自动生成方法存根????}????????/**?????*?JSON?时间解析器具?????*?@param?datePattern?????*?@return?????*/????public?static?JsonConfig?configJson(String?datePattern)?{???????????????JsonConfig?jsonConfig?=?new?JsonConfig();???????????????jsonConfig.setExcludes(new?String[]{""});???????????????jsonConfig.setIgnoreDefaultExcludes(false);???????????????jsonConfig.setCycleDetectionStrategy(CycleDetectionStrategy.LENIENT);???????????????jsonConfig.registerJsonValueProcessor(Date.class,???????????????????new?DateJsonValueProcessor(datePattern));?????????????????????????return?jsonConfig;???????????}??????????/**?????*??????*?@param?excludes?????*?@param?datePattern?????*?@return?????*/????public?static?JsonConfig?configJson(String[]?excludes,???????????????String?datePattern)?{???????????????JsonConfig?jsonConfig?=?new?JsonConfig();???????????????jsonConfig.setExcludes(excludes);???????????????jsonConfig.setIgnoreDefaultExcludes(false);???????????????jsonConfig.setCycleDetectionStrategy(CycleDetectionStrategy.LENIENT);???????????????jsonConfig.registerJsonValueProcessor(Date.class,???????????????????new?DateJsonValueProcessor(datePattern));?????????????????????????return?jsonConfig;???????????}??}/**?*?linkwise?*/package?com.linghui.common.util.jsonutil;import?java.text.DateFormat;import?java.text.SimpleDateFormat;import?java.util.Date;import?net.sf.json.JsonConfig;import?net.sf.json.processors.JsonValueProcessor;/**?*??@author?</br>?<a?href="mailto:fx19800215@163.com">?robert.feng</a>?*?*/public?class?DateJsonValueProcessor?implements?JsonValueProcessor?{????
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