1.   Json-lib可以将Java对象很方便的转成json格式的字符串,使用教程(http://json-lib.sourceforge.net/usage.html)

   但是当Java对象中有时间类型的时候。 Json-lib会把时间字段转换成：

{"date":17,"day":3,"hours":0,"minutes":0,"month":11,"nanos":0,"seconds":0,"time":345830400000,"timezoneOffset":-480,"year":80},"ENAME":"SMITH"}

如何处理呢？

第一种(extjs中处理的)：http://blog.csdn.net/without0815/article/details/7788582

第二种(主要)：

List list=iEmpDao.getListEmp(pageIndex, pageNo);
		
		//Map<String,Object> map = (Map<String,Object>)list.get(0);
		//JSONArray ja1=new JSONArray().fromObject(list);
		JSONArray ja = new JSONArray();
		JsonConfig jf = new JsonConfig();
		//jf.registerJsonValueProcessor(java.sql.Timestamp.class, new DateJsonValueProcessor("yyyy-MM-dd HH:mm:ss"));
		jf.registerJsonValueProcessor(java.sql.Timestamp.class, new DateJsonValueProcessor("yyyy-MM-dd"));
		jf.registerJsonValueProcessor(java.util.Date.class, new DateJsonValueProcessor("yyyy-MM-dd"));
		System.out.println(ja.fromObject(list,jf).toString());		
		
		return  ja.fromObject(list,jf).toString();

DateJsonValueProcessor是实现了一个JsonValueProcessor接口

package org.ymm.util;

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

public class DateJsonValueProcessor implements JsonValueProcessor
{
	
	private String format;
	public DateJsonValueProcessor(String format){
		this.format = format;
	}
	
    public Object processArrayValue(Object value, JsonConfig jsonConfig)
    {
        return null;
    }

    public Object processObjectValue(String key, Object value, JsonConfig jsonConfig)
    {
        if(value == null)
        {
            return "";
        }
        if(value instanceof java.sql.Timestamp)
        {
            String str = new SimpleDateFormat(format).format((java.sql.Timestamp)value);
            return str;
        }
        if (value instanceof java.util.Date)
        {
            String str = new SimpleDateFormat(format).format((java.util.Date) value);
            return str;
        }
        
        return value.toString();
    }
}

1楼huang798807481昨天 20:49

小休啊，不错，蛮好，互相学习哈，