含有Timestamp、Date的bean和Json相互转换

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import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
import net.sf.json.JsonConfig;
import net.sf.json.processors.JsonValueProcessor;

/**
* 将Bean中的Timestamp、Date转换为json中的日期字符串
* @author weijie
*
*/
public class DateJsonValueProcessor implements JsonValueProcessor {
   public static final String Default_DATE_PATTERN = "yyyy-MM-dd";
   private DateFormat dateFormat;

   public DateJsonValueProcessor(String datePattern) {
       try {
           dateFormat = new SimpleDateFormat(datePattern);
       } catch (Exception e) {
           dateFormat = new SimpleDateFormat(Default_DATE_PATTERN);
       }
   }

   public Object processArrayValue(Object value, JsonConfig jsonConfig) {
       return process(value);
   }

   public Object processObjectValue(String key, Object value, JsonConfig jsonConfig) {
       return process(value);
   }

   private Object process(Object value) {
       return dateFormat.format((Date) value);
   }

}

import java.sql.Timestamp;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import net.sf.ezmorph.MorphException;
import net.sf.ezmorph.object.AbstractObjectMorpher;
/**
* 将json串中的日期字符串转换为bean中的Timestamp、Date
*
* @author weijie
*
*/
public class TimestampMorpher extends AbstractObjectMorpher{
   /*** 日期字符串格式 */
   private String[] formats;

   public TimestampMorpher(String[] formats) {
       this.formats = formats;
   }

   public Object morph(Object value) {
       if (value == null) {
           return null;
       }
       if (Timestamp.class.isAssignableFrom(value.getClass())) {
           return (Timestamp) value;
       }
       if (!supports(value.getClass())) {
           throw new MorphException(value.getClass() + " 是不支持的类型");
       }
       String strValue = (String) value;
       SimpleDateFormat dateParser = null;
       for (int i = 0; i < formats.length; i++) {
           if (null == dateParser) {
               dateParser = new SimpleDateFormat(formats[i]);
           } else {
               dateParser.applyPattern(formats[i]);
           }
           try {
               return new Timestamp(dateParser.parse(strValue.toLowerCase()).getTime());
           } catch (ParseException e) {
               e.printStackTrace();
           }
       }
       return null;
   }

   @Override
   public Class morphsTo() {
       return Timestamp.class;
   }

   public boolean supports(Class clazz) {
       return String.class.isAssignableFrom(clazz);
   }
}
import java.sql.Timestamp;

import net.sf.json.JSONObject;
import net.sf.json.JsonConfig;
import net.sf.json.util.JSONUtils;

public class Util {
   public static Object jsonToBean(String json, Class cls) {
       String[] formats = { "yyyy-MM-dd HH:mm:ss", "yyyy-MM-dd" };
       JSONUtils.getMorpherRegistry().registerMorpher(new TimestampMorpher(formats));
       JSONObject jsonObject = JSONObject.fromObject(json);
       return JSONObject.toBean(jsonObject, cls);
   }

   public static String beanToJson(Object obj, String dateFormat) {
       JsonConfig config = new JsonConfig();
       config.registerJsonValueProcessor(Timestamp.class, new DateJsonValueProcessor(dateFormat));
       JSONObject json = JSONObject.fromObject(obj, config);
       return json.toString();
   }
}

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