后台解决 json-lib封装的时间

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)：

[java] view plain copy

print?

1. List list=iEmpDao.getListEmp(pageIndex, pageNo);  
2.           
3.         //Map<String,Object> map = (Map<String,Object>)list.get(0);  
4.         //JSONArray ja1=new JSONArray().fromObject(list);  
5.         JSONArray ja = new JSONArray();  
6.         JsonConfig jf = new JsonConfig();  
7.         //jf.registerJsonValueProcessor(java.sql.Timestamp.class, new DateJsonValueProcessor(“yyyy-MM-dd HH:mm:ss”));  
8.         jf.registerJsonValueProcessor(java.sql.Timestamp.class, new DateJsonValueProcessor(“yyyy-MM-dd”));  
9.         jf.registerJsonValueProcessor(java.util.Date.class, new DateJsonValueProcessor(“yyyy-MM-dd”));  
10.         System.out.println(ja.fromObject(list,jf).toString());        
11.           
12.         return  ja.fromObject(list,jf).toString();  

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

[java] view plain copy

print?

1. package org.ymm.util;  
2.   
3. import java.text.SimpleDateFormat;  
4. import net.sf.json.JsonConfig;  
5. import net.sf.json.processors.JsonValueProcessor;  
6.   
7. public class DateJsonValueProcessor implements JsonValueProcessor  
8. {  
9.       
10.     private String format;  
11.     public DateJsonValueProcessor(String format){  
12.         this.format = format;  
13.     }  
14.       
15.     public Object processArrayValue(Object value, JsonConfig jsonConfig)  
16.     {  
17.         return null;  
18.     }  
19.   
20.     public Object processObjectValue(String key, Object value, JsonConfig jsonConfig)  
21.     {  
22.         if(value == null)  
23.         {  
24.             return “”;  
25.         }  
26.         if(value instanceof java.sql.Timestamp)  
27.         {  
28.             String str = new SimpleDateFormat(format).format((java.sql.Timestamp)value);  
29.             return str;  
30.         }  
31.         if (value instanceof java.util.Date)  
32.         {  
33.             String str = new SimpleDateFormat(format).format((java.util.Date) value);  
34.             return str;  
35.         }  
36.           
37.         return value.toString();  
38.     }  
39. }  

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();    }}

只要是时间类型被处理格式化