华水

@SuppressWarnings("unchecked")
public class JsonUtils {
 
 
 
	/**
	 * 从一个JSON 对象字符格式中得到一个java对象，形如：
	 * {"id" : idValue, "name" : nameValue, "aBean" : {"aBeanId" : aBeanIdValue, ...}}
	 * @param object
	 * @param clazz
	 * @return
	 */
	public static Object getDTO(String jsonString, Class clazz) {
		JSONObject jsonObject = null;
		try {
			setDataFormat2JAVA();
			jsonObject = JSONObject.fromObject(jsonString);
		} catch (Exception e) {
			e.printStackTrace();
		}
		return JSONObject.toBean(jsonObject, clazz);
	}
 
	/**
	 * 从一个JSON 对象字符格式中得到一个java对象，其中beansList是一类的集合，形如：
	 * {"id" : idValue, "name" : nameValue, "aBean" : {"aBeanId" : aBeanIdValue, ...},
	 * beansList:[{}, {}, ...]}
	 * @param jsonString
	 * @param clazz
	 * @param map 集合属性的类型 (key : 集合属性名, value : 集合属性类型class) eg: ("beansList" : Bean.class)
	 * @return
	 */
	public static Object getDTO(String jsonString, Class clazz, Map map) {
		JSONObject jsonObject = null;
		try {
			setDataFormat2JAVA();
			jsonObject = JSONObject.fromObject(jsonString);
		} catch (Exception e) {
			e.printStackTrace();
		}
		return JSONObject.toBean(jsonObject, clazz, map);
	}
 
	/**
	 * 从一个JSON数组得到一个java对象数组，形如：
	 * [{"id" : idValue, "name" : nameValue}, {"id" : idValue, "name" : nameValue}, ...]
	 * @param object
	 * @param clazz
	 * @return
	 */
	public static Object[] getDTOArray(String jsonString, Class clazz) {
		setDataFormat2JAVA();
		JSONArray array = JSONArray.fromObject(jsonString);
		Object[] obj = new Object[array.size()];
		for (int i = 0; i < array.size(); i++) {
			JSONObject jsonObject = array.getJSONObject(i);
			obj[i] = JSONObject.toBean(jsonObject, clazz);
		}
		return obj;
	}
 
	/**
	 * 从一个JSON数组得到一个java对象数组，形如：
	 * [{"id" : idValue, "name" : nameValue}, {"id" : idValue, "name" : nameValue}, ...]
	 * @param object
	 * @param clazz
	 * @param map
	 * @return
	 */
	public static Object[] getDTOArray(String jsonString, Class clazz, Map map) {
		setDataFormat2JAVA();
		JSONArray array = JSONArray.fromObject(jsonString);
		Object[] obj = new Object[array.size()];
		for (int i = 0; i < array.size(); i++) {
			JSONObject jsonObject = array.getJSONObject(i);
			obj[i] = JSONObject.toBean(jsonObject, clazz, map);
		}
		return obj;
	}
 
	/**
	 * 从一个JSON数组得到一个java对象集合
	 * @param object
	 * @param clazz
	 * @return
	 */
 
	public static List getDTOList(String jsonString, Class clazz) {
		setDataFormat2JAVA();
		JSONArray array = JSONArray.fromObject(jsonString);
		List list = new ArrayList();
		for (Iterator iter = array.iterator(); iter.hasNext();) {
			JSONObject jsonObject = (JSONObject) iter.next();
			list.add(JSONObject.toBean(jsonObject, clazz));
		}
		return list;
	}
 
	/**
	 * 从一个JSON数组得到一个java对象集合，其中对象中包含有集合属性
	 * @param object
	 * @param clazz
	 * @param map 集合属性的类型
	 * @return
	 * class MyBean{   
	 *   private List data;   
	 *		   // getters & setters   
	 *	}   
	 *	  
	 * class Person{   
	 *	   private String name;   
	 *	   // getters & setters   
	 *	}   
	 *	  
	 *	...   
	 *	  
	 *	String json = "{'data':[{'name':'Wallace'},{'name':'Grommit'}]}";   
	 *  Map classMap = new HashMap();   
	 *	classMap.put( "data", Person.class );   
	 *	MyBean bean = JSONObject.toBean( JSONObject.fromObject(json), MyBean.class, classMap );  
	 */
	public static List getDTOList(String jsonString, Class clazz, Map map) {
		setDataFormat2JAVA();
		JSONArray array = JSONArray.fromObject(jsonString);
		List list = new ArrayList();
		for (Iterator iter = array.iterator(); iter.hasNext();) {
			JSONObject jsonObject = (JSONObject) iter.next();
			list.add(JSONObject.toBean(jsonObject, clazz, map));
		}
		return list;
	}
 
	/**
	 * 从json HASH表达式中获取一个map，该map支持嵌套功能
	 * 形如：{"id" : "johncon", "name" : "小强"}
	 * 注意commons-collections版本，必须包含org.apache.commons.collections.map.MultiKeyMap
	 * @param object
	 * @return
	 */
	public static Map getMapFromJson(String jsonString) {
		setDataFormat2JAVA();
		JSONObject jsonObject = JSONObject.fromObject(jsonString);
		Map map = new HashMap();
		for (Iterator iter = jsonObject.keys(); iter.hasNext();) {
			String key = (String) iter.next();
			map.put(key, jsonObject.get(key));
		}
		return map;
	}
 
	/**
	 * 从json数组中得到相应java数组
	 * json形如：["123", "456"]
	 * @param jsonString
	 * @return
	 */
	public static Object[] getObjectArrayFromJson(String jsonString) {
		JSONArray jsonArray = JSONArray.fromObject(jsonString);
		return jsonArray.toArray();
	}
 
	/**
	 * 把数据对象转换成json字符串
	 * DTO对象形如：{"id" : idValue, "name" : nameValue, ...}
	 * 数组对象形如：[{}, {}, {}, ...]
	 * map对象形如：{key1 : {"id" : idValue, "name" : nameValue, ...}, key2 : {}, ...}
	 * @param object
	 * @return
	 */
	public static String getJSONString(Object object) throws Exception {
		String jsonString = null;
		//日期值处理器
		JsonConfig jsonConfig = new JsonConfig();
		jsonConfig.registerJsonValueProcessor(java.util.Date.class,
				new JsonDateValueProcessor());
		if (object != null) {
			if (object instanceof Collection || object instanceof Object[]) {
				jsonString = JSONArray.fromObject(object, jsonConfig)
						.toString();
			} else {
				jsonString = JSONObject.fromObject(object, jsonConfig)
						.toString();
			}
		}
		return jsonString == null ? "{}" : jsonString;
	}
 
	private static void setDataFormat2JAVA() {
		//设定日期转换格式
		JSONUtils.getMorpherRegistry().registerMorpher(
				new DateMorpher(new String[] { "yyyy-MM-dd",
						"yyyy-MM-dd HH:mm:ss" }));
	}
 
	public static void main(String[] arg) throws Exception {
		String s = "{status : 'success'}";
		System.out.println(" object : " + JsonUtils.getJSONString(s));
	}
}

public class JsonDateValueProcessor implements JsonValueProcessor {
 
	private String format = "yyyy-MM-dd HH:mm:ss";
 
	public JsonDateValueProcessor() {
 
	}
 
	public JsonDateValueProcessor(String format) {
		this.format = format;
	}
 
	public Object processArrayValue(Object value, JsonConfig jsonConfig) {
		return process(value, jsonConfig);
	}
 
	public Object processObjectValue(String key, Object value, JsonConfig jsonConfig) {
		return process(value, jsonConfig);
	}
 
	private Object process( Object value, JsonConfig jsonConfig ) {
		if (value instanceof Date) {
			String str = new SimpleDateFormat(format).format((Date) value);
			return str;
		}
		return value == null ? null : value.toString();
	}
 
	public String getFormat() {
		return format;
	}
 
	public void setFormat(String format) {
		this.format = format;
	}
 
}