json-lib 日期格式转换

矫情吗；* 2022-08-27 01:12 237阅读 0赞

public class Person {
    	private String name; 
        private Date birthday; 
    
        public void setName(String name) { 
            this.name = name; 
        } 
    
        public String getName() { 
            return name; 
        } 
    
        public void setBirthday(Date birthday) { 
            this.birthday = birthday; 
        } 
    
        public Date getBirthday() { 
            return birthday; 
        } 
    
    }

import java.util.ArrayList;
    import java.util.Collection;
    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.JsonConfig;
    import net.sf.json.util.JSONUtils;
    
    /**
     * @author <a href="mailto:wang-yu@msn.com">WangYu</a></br>
     * @version 1.0 <br>
     * @since JDK 1.6.0.12 <br>
     */
    
    public class JsonUtil {
    
    	/**页面传至后台时，json数据在request的参数名称*/
    	public final static String JSON_ATTRIBUTE = "json";
    	public final static String JSON_ATTRIBUTE1 = "json1";
    	public final static String JSON_ATTRIBUTE2 = "json2";
    	public final static String JSON_ATTRIBUTE3 = "json3";
    	public final static String JSON_ATTRIBUTE4 = "json4";
    	
    	/**
    	 * 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
    	 */
    	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 DateJsonValueProcessor());
    		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 class Test {
    	public static void main(String[] args) {
    		String personData = "{\"birthday\":\"1980/01/01\",\"name\":\"testname\"}";
    		JSONObject jsonPerson = JSONObject.fromObject(personData); 
    		String[] dateFormats = new String[] {"yyyy/MM/dd"}; 
    		JSONUtils.getMorpherRegistry().registerMorpher(new DateMorpher(dateFormats)); 
    		Person person = (Person)JSONObject.toBean(jsonPerson, Person.class);
    		System.out.println(person.getBirthday());
    	}
    }