package com.develop.util; import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map; import net.sf.ezmorph.object.DateMorpher;
import net.sf.json.JSONArray;
import net.sf.json.JSONObject;
import net.sf.json.JSONSerializer;
import net.sf.json.JsonConfig;
import net.sf.json.util.CycleDetectionStrategy;
import net.sf.json.util.JSONUtils;
import net.sf.json.util.PropertyFilter; public class JsonUtil {
/**
* 转成jsonOjbect对象
* @param obj
* @return
*/
public static JSONObject toJsonOjbect(Object obj){
JsonConfig jsonConfig = new JsonConfig();
jsonConfig.setCycleDetectionStrategy(CycleDetectionStrategy.LENIENT);//可防止hibernate模式下的关联关系子对象中包含父对象造成死循环
JSONObject jsonObject = JSONObject.fromObject(obj,jsonConfig);
return jsonObject;
} /**
* 转成jsonArray对象
* @param obj
* @return
*/
public static JSONArray toJsonArray(Object obj){
JsonConfig jsonConfig = new JsonConfig();
jsonConfig.setCycleDetectionStrategy(CycleDetectionStrategy.LENIENT);//可防止hibernate模式下的关联关系子对象中包含父对象造成死循环
JSONArray jsonArray = JSONArray.fromObject(obj,jsonConfig);
return jsonArray;
} /**
* json串或jsonobject对象转成Map
* @param obj
* @return
*/
public static Map<?, ?> jsonToMap(Object obj){
JSONObject jsonObject = null;
if(obj instanceof JSONObject){
jsonObject = (JSONObject)obj;
}else{
jsonObject = JSONObject.fromObject(obj);
} Map<Object, Object> map = new HashMap<Object, Object>(jsonObject.size());
Iterator<?> it = jsonObject.keys();
while(it.hasNext()){
Object key = it.next();
Object value = jsonObject.get(key);
if(value instanceof JSONObject){
map.put(key, jsonToMap(value));
}else if(value instanceof JSONArray){
map.put(key, jsonArrToList(value));
}else{
map.put(key, value);
}
} return map;
} /**
* list串或jsonArray对象转成list
* @param obj
* @return
*/
public static List<?> jsonArrToList(Object obj){ JSONArray jsonArray = null;
if(obj instanceof JSONArray){
jsonArray = (JSONArray)obj;
}else{
jsonArray = JSONArray.fromObject(obj);
} List list = new ArrayList(jsonArray.size());
Iterator<?> it = jsonArray.iterator();
while(it.hasNext()){
Object next = it.next();
if(next instanceof JSONObject){
list.add(jsonToMap(next));
}else if(next instanceof JSONArray){
list.add(jsonArrToList(next));
}else{
list.add(next);
}
} return list;
} /**
* json串转java对象
* @param jsonStr json串
* @param rootClass 要转成的主对象
* @param subClassMap 主对象中包含的list类型的属性Map 格式:subClassMap.put("iordersegments", IorderSegment.class); key是子对象在主对象中的属性名, value是子对象类型
* @return
*/
public static <T>T jsonToBean(String jsonStr,Class<T> rootClass,Map<String, Class> subClassMap){
JsonConfig filterNullConfig = new JsonConfig();
//过滤掉参数值为null的参数,防止后边的时间转换出错
filterNullConfig.setJsonPropertyFilter(new PropertyFilter() {
@Override
public boolean apply(Object clazz, String name, Object value) {
boolean isFilter = false;
if(value==null||"".equals(value)){
isFilter = true;
}
return isFilter;
}
}); JSONObject jsonObject = JSONObject.fromObject(jsonStr,filterNullConfig); String[] dateFormats = new String[] {"yyyy-MM-dd HH:mm:ss","yyyy-MM-dd","yyyy-MM-dd HH:mm"};//不过好像只有 yyyy-MM-dd HH:mm:ss 格式有效
JSONUtils.getMorpherRegistry().registerMorpher(new DateMorpher(dateFormats)); JsonConfig jsonConfig = new JsonConfig();
jsonConfig.setRootClass(rootClass);
if(subClassMap!=null&&subClassMap.size()>0){
jsonConfig.setClassMap(subClassMap);
} return (T)JSONSerializer.toJava(jsonObject, jsonConfig);
} }