JSONHelper 工具类

package org.platform.utils.json;


import java.util.ArrayList;
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 org.apache.commons.beanutils.BeanUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public final class JSONHelper {
@SuppressWarnings("unused")
private static final Logger logger = LoggerFactory
.getLogger(JSONHelper.class);


// 将数组转换成JSON
public static String array2json(Object object) {
JSONArray jsonArray = JSONArray.fromObject(object);
return jsonArray.toString();
}


// 将JSON转换成数组,其中valueClz为数组中存放的对象的Class
@SuppressWarnings("rawtypes")
public static Object json2Array(String json, Class valueClz) {
JSONArray jsonArray = JSONArray.fromObject(json);
return JSONArray.toArray(jsonArray, valueClz);
}


// 将Collection转换成JSON
public static String collection2json(Object object) {
JSONArray jsonArray = JSONArray.fromObject(object);
return jsonArray.toString();
}


// 将Map转换成JSON
public static String map2json(Object object) {
JSONObject jsonObject = JSONObject.fromObject(object);
return jsonObject.toString();
}


// 将JSON转换成Map,其中valueClz为Map中value的Class,keyArray为Map的key
@SuppressWarnings({ "unchecked", "rawtypes" })
public static Map json2Map(Object[] keyArray, String json, Class valueClz) {
JSONObject jsonObject = JSONObject.fromObject(json);
Map classMap = new HashMap();


for (int i = 0; i < keyArray.length; i++) {
classMap.put(keyArray[i], valueClz);
}


return (Map) JSONObject.toBean(jsonObject, Map.class, classMap);
}


// 将POJO转换成JSON
public static String bean2json(Object object) {
JSONObject jsonObject = JSONObject.fromObject(object);
return jsonObject.toString();
}


// 将JSON转换成POJO,其中beanClz为POJO的Class
@SuppressWarnings("rawtypes")
public static Object json2Object(String json, Class beanClz) {
return JSONObject.toBean(JSONObject.fromObject(json), beanClz);
}


// 将String转换成JSON
public static String string2json(String key, String value) {
JSONObject object = new JSONObject();
object.put(key, value);
return object.toString();
}


// 将JSON转换成String
public static String json2String(String json, String key) {
JSONObject jsonObject = JSONObject.fromObject(json);
return jsonObject.get(key).toString();
}


/***
* 将List对象序列化为JSON文本
*/
public static String toJSONString(List list) {
JSONArray jsonArray = JSONArray.fromObject(list);


return jsonArray.toString();
}


/***
* 将对象序列化为JSON文本
* 
* @param object
* @return
*/
public static String toJSONString(Object object) {
JSONArray jsonArray = JSONArray.fromObject(object);


return jsonArray.toString();
}


/***
* 将JSON对象数组序列化为JSON文本
* 
* @param jsonArray
* @return
*/
public static String toJSONString(JSONArray jsonArray) {
return jsonArray.toString();
}


/***
* 将JSON对象序列化为JSON文本
* 
* @param jsonObject
* @return
*/
public static String toJSONString(JSONObject jsonObject) {
return jsonObject.toString();
}


/***
* 将对象转换为List对象
* 
* @param object
* @return
*/
@SuppressWarnings({ "rawtypes", "unchecked" })
public static List toArrayList(Object object) {
List arrayList = new ArrayList();


JSONArray jsonArray = JSONArray.fromObject(object);


Iterator it = jsonArray.iterator();
while (it.hasNext()) {
JSONObject jsonObject = (JSONObject) it.next();


Iterator keys = jsonObject.keys();
while (keys.hasNext()) {
Object key = keys.next();
Object value = jsonObject.get(key);
arrayList.add(value);
}
}


return arrayList;
}


/* *//***
* 将对象转换为Collection对象
* 
* @param object
* @return
*/
/*
* public static Collection toCollection(Object object) { JSONArray
* jsonArray = JSONArray.fromObject(object);
* 
* return JSONArray.toCollection(jsonArray); }
*/


/***
* 将对象转换为JSON对象数组
* 
* @param object
* @return
*/
public static JSONArray toJSONArray(Object object) {
return JSONArray.fromObject(object);
}


/***
* 将对象转换为JSON对象
* 
* @param object
* @return
*/
public static JSONObject toJSONObject(Object object) {
return JSONObject.fromObject(object);
}


/***
* 将对象转换为HashMap
* 
* @param object
* @return
*/
@SuppressWarnings("rawtypes")
public static HashMap toHashMap(Object object) {
HashMap data = new HashMap();
JSONObject jsonObject = JSONHelper.toJSONObject(object);
Iterator it = jsonObject.keys();
while (it.hasNext()) {
String key = String.valueOf(it.next());
Object value = jsonObject.get(key);
data.put(key, value);
}


return data;
}


/**
* 将json格式的字符串解析成Map对象

* json格式：{"name":"admin","retries":"3fff","testname":"ddd","testretries":
* "fffffffff"}
*/
@SuppressWarnings("rawtypes")
public static Map json2Map(String jsonStr) {
Map data = new HashMap();
// 将json字符串转换成jsonObject
JSONObject jsonObject = JSONObject.fromObject(jsonStr);
Iterator it = jsonObject.keys();
// 遍历jsonObject数据，添加到Map对象
while (it.hasNext()) {
String key = String.valueOf(it.next());
Object value = jsonObject.get(key);
data.put(key, value);
}
return data;
}


/**
* 将json格式的字符串解析成Map对象

* json格式：{"name":"admin","retries":"3fff","testname":"ddd","testretries":
* "fffffffff"}
*/
@SuppressWarnings("rawtypes")
public static Map>> json2MapList(
String jsonStr) {
Map>> data = new HashMap>>();
// 将json字符串转换成jsonObject
JSONObject jsonObject = JSONObject.fromObject(jsonStr);
Iterator it = jsonObject.keys();
// 遍历jsonObject数据，添加到Map对象
while (it.hasNext()) {
String key = String.valueOf(it.next());
Object value = jsonObject.get(key);
List> list = toList(value);
data.put(key, list);
}
return data;
}


/***
* 将对象转换为List>
* 
* @param object
* @return
*/
// 返回非实体类型(Map)的List
@SuppressWarnings("rawtypes")
public static List> toList(Object object) {
List> list = new ArrayList>();
JSONArray jsonArray = JSONArray.fromObject(object);
for (Object obj : jsonArray) {
JSONObject jsonObject = (JSONObject) obj;
Map map = new HashMap();
Iterator it = jsonObject.keys();
while (it.hasNext()) {
String key = (String) it.next();
Object value = jsonObject.get(key);
map.put((String) key, value);
}
list.add(map);
}
return list;
}


// 返回非实体类型(Map)的List
@SuppressWarnings("rawtypes")
public static List> toList(JSONArray jsonArray) {
List> list = new ArrayList>();
for (Object obj : jsonArray) {
JSONObject jsonObject = (JSONObject) obj;
Map map = new HashMap();
Iterator it = jsonObject.keys();
while (it.hasNext()) {
String key = (String) it.next();
Object value = jsonObject.get(key);
map.put((String) key, value);
}
list.add(map);
}
return list;
}


/***
* 将JSON对象数组转换为传入类型的List
* 
* @param
* @param jsonArray
* @param objectClass
* @return
*/
@SuppressWarnings({ "deprecation", "unchecked" })
public static List toList(JSONArray jsonArray, Class objectClass) {
return JSONArray.toList(jsonArray, objectClass);
}


/***
* 将对象转换为传入类型的List
* 
* @param
* @param jsonArray
* @param objectClass
* @return
*/
@SuppressWarnings({ "unchecked", "deprecation" })
public static List toList(Object object, Class objectClass) {
JSONArray jsonArray = JSONArray.fromObject(object);


return JSONArray.toList(jsonArray, objectClass);
}


/***
* 将JSON对象转换为传入类型的对象
* 
* @param
* @param jsonObject
* @param beanClass
* @return
*/
@SuppressWarnings("unchecked")
public static T toBean(JSONObject jsonObject, Class beanClass) {
return (T) JSONObject.toBean(jsonObject, beanClass);
}


/***
* 将将对象转换为传入类型的对象
* 
* @param
* @param object
* @param beanClass
* @return
*/
@SuppressWarnings("unchecked")
public static T toBean(Object object, Class beanClass) {
JSONObject jsonObject = JSONObject.fromObject(object);


return (T) JSONObject.toBean(jsonObject, beanClass);
}


/***
* 将JSON文本反序列化为主从关系的实体
* 
* @param
*            泛型T 代表主实体类型
* @param
*            泛型D 代表从实体类型
* @param jsonString
*            JSON文本
* @param mainClass
*            主实体类型
* @param detailName
*            从实体类在主实体类中的属性名称
* @param detailClass
*            从实体类型
* @return
*/
public static T toBean(String jsonString, Class mainClass,
String detailName, Class detailClass) {
JSONObject jsonObject = JSONObject.fromObject(jsonString);
JSONArray jsonArray = (JSONArray) jsonObject.get(detailName);


T mainEntity = JSONHelper.toBean(jsonObject, mainClass);
List detailList = JSONHelper.toList(jsonArray, detailClass);


try {
BeanUtils.setProperty(mainEntity, detailName, detailList);
} catch (Exception ex) {
throw new RuntimeException("主从关系JSON反序列化实体失败！");
}


return mainEntity;
}


/***
* 将JSON文本反序列化为主从关系的实体
* 
* @param 泛型T 代表主实体类型
* @param 泛型D1 代表从实体类型
* @param 泛型D2 代表从实体类型
* @param jsonString
*            JSON文本
* @param mainClass
*            主实体类型
* @param detailName1
*            从实体类在主实体类中的属性
* @param detailClass1
*            从实体类型
* @param detailName2
*            从实体类在主实体类中的属性
* @param detailClass2
*            从实体类型
* @return
*/
public static T toBean(String jsonString, Class mainClass,
String detailName1, Class detailClass1, String detailName2,
Class detailClass2) {
JSONObject jsonObject = JSONObject.fromObject(jsonString);
JSONArray jsonArray1 = (JSONArray) jsonObject.get(detailName1);
JSONArray jsonArray2 = (JSONArray) jsonObject.get(detailName2);


T mainEntity = JSONHelper.toBean(jsonObject, mainClass);
List detailList1 = JSONHelper.toList(jsonArray1, detailClass1);
List detailList2 = JSONHelper.toList(jsonArray2, detailClass2);


try {
BeanUtils.setProperty(mainEntity, detailName1, detailList1);
BeanUtils.setProperty(mainEntity, detailName2, detailList2);
} catch (Exception ex) {
throw new RuntimeException("主从关系JSON反序列化实体失败！");
}


return mainEntity;
}


/***
* 将JSON文本反序列化为主从关系的实体
* 
* @param 泛型T 代表主实体类型
* @param 泛型D1 代表从实体类型
* @param 泛型D2 代表从实体类型
* @param jsonString
*            JSON文本
* @param mainClass
*            主实体类型
* @param detailName1
*            从实体类在主实体类中的属性
* @param detailClass1
*            从实体类型
* @param detailName2
*            从实体类在主实体类中的属性
* @param detailClass2
*            从实体类型
* @param detailName3
*            从实体类在主实体类中的属性
* @param detailClass3
*            从实体类型
* @return
*/
public static T toBean(String jsonString,
Class mainClass, String detailName1, Class detailClass1,
String detailName2, Class detailClass2, String detailName3,
Class detailClass3) {
JSONObject jsonObject = JSONObject.fromObject(jsonString);
JSONArray jsonArray1 = (JSONArray) jsonObject.get(detailName1);
JSONArray jsonArray2 = (JSONArray) jsonObject.get(detailName2);
JSONArray jsonArray3 = (JSONArray) jsonObject.get(detailName3);


T mainEntity = JSONHelper.toBean(jsonObject, mainClass);
List detailList1 = JSONHelper.toList(jsonArray1, detailClass1);
List detailList2 = JSONHelper.toList(jsonArray2, detailClass2);
List detailList3 = JSONHelper.toList(jsonArray3, detailClass3);


try {
BeanUtils.setProperty(mainEntity, detailName1, detailList1);
BeanUtils.setProperty(mainEntity, detailName2, detailList2);
BeanUtils.setProperty(mainEntity, detailName3, detailList3);
} catch (Exception ex) {
throw new RuntimeException("主从关系JSON反序列化实体失败！");
}


return mainEntity;
}


/***
* 将JSON文本反序列化为主从关系的实体
* 
* @param
*            主实体类型
* @param jsonString
*            JSON文本
* @param mainClass
*            主实体类型
* @param detailClass
*            存放了多个从实体在主实体中属性名称和类型
* @return
*/
@SuppressWarnings("rawtypes")
public static T toBean(String jsonString, Class mainClass,
HashMap detailClass) {
JSONObject jsonObject = JSONObject.fromObject(jsonString);
T mainEntity = JSONHelper.toBean(jsonObject, mainClass);
for (Object key : detailClass.keySet()) {
try {
Class value = (Class) detailClass.get(key);
BeanUtils.setProperty(mainEntity, key.toString(), value);
} catch (Exception ex) {
throw new RuntimeException("主从关系JSON反序列化实体失败！");
}
}
return mainEntity;
}


@SuppressWarnings("rawtypes")
public static String listtojson(String[] fields, int total, List list)
throws Exception {
String jsonTemp = "{\"total\":" + total + ",\"rows\":[";
/*
* for (int j = 0; j < list.size(); j++) { jsonTemp = jsonTemp +
* "{\"state\":\"closed\","; for (int i = 0; i < fields.length; i++) {
* String fieldName = fields[i].toString(); values[i] =
* org.jeecgframework
* .tag.core.easyui.TagUtil.fieldNametoValues(fieldName, list.get(j));
* jsonTemp = jsonTemp + "\"" + fieldName + "\"" + ":\"" + values[i] +
* "\""; if (i != fields.length - 1) { jsonTemp = jsonTemp + ","; } } if
* (j != list.size() - 1) { jsonTemp = jsonTemp + "},"; } else {
* jsonTemp = jsonTemp + "}"; } } jsonTemp = jsonTemp + "]}";
*/
return jsonTemp;
}


}