java处置JSON格式数据的通用类-分享 _JavaScript

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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