JSON格式化日期方法

首先我使用的工具是json-lib

地址http://json-lib.sourceforge.net/

 

也可参考我的http://lyking2001.iteye.com/admin/blogs/504020了解json-lib

 

对于date类型的转化一直是json中比较复杂的事情，我这只提出一种自己会的方式与大家分享，如果还好更好的方式别忘记告诉我学习下嘿嘿在这先谢了

 

对于date类型直接转化如下

 

		java.util.Date testDate = new Date();
		JSONObject jsonFromDate = JSONObject.fromObject(testDate);
		System.out.println(jsonFromDate);
		//prints {"date":26,"day":1,"hours":11,"minutes":30,"month":9,"seconds":18,"time":1256527818296,"timezoneOffset":-480,"year":109}

 

上述转化后的格式明显不利于我们使用，下面介绍我的方法

 

 

		//注册date类型的转化方式
		 JsonConfig jsonConfig = new JsonConfig();
		 jsonConfig.registerJsonValueProcessor(java.util.Date.class, new JsonValueProcessorImplTest());
		 
		JSONObject jsonFromBean = JSONObject.fromObject(testBean,jsonConfig);
		System.out.println(jsonFromBean);
		
		//prints {"birthday":"2009-10-26","id":"id","name":"name"}
		
		String[] dateFormats = new String[] {"yyyy/MM/dd","yyyy-MM-dd"}; 
		JSONUtils.getMorpherRegistry().registerMorpher(new DateMorpher(dateFormats)); 
		TestBean jsonToBean = (TestBean)JSONObject.toBean(jsonFromBean,TestBean.class);
		System.out.println(jsonToBean);
		//prints TestBean@1126b07[id=id,name=name,birthday=Mon Oct 26 00:00:00 CST 2009]

 

其中需要的类如下：

 

1.准备测试数据

 

import java.util.Date;

import org.apache.commons.lang.builder.ReflectionToStringBuilder;

public class TestBean {

	private String id;
	private String name;
	private java.util.Date birthday;

	public TestBean() {
		super();
	}

	public TestBean(String id, String name, Date birthday) {
		super();
		this.id = id;
		this.name = name;
		this.birthday = birthday;
	}

	public String getId() {
		return id;
	}

	public void setId(String id) {
		this.id = id;
	}

	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}

	public java.util.Date getBirthday() {
		return birthday;
	}

	public void setBirthday(java.util.Date birthday) {
		this.birthday = birthday;
	}

	public String toString() {
		return ReflectionToStringBuilder.toString(this);
	}

}

 

 

 2.创建date格式化类

 

import java.text.SimpleDateFormat;
import java.util.Date;

import net.sf.json.JsonConfig;
import net.sf.json.processors.JsonValueProcessor;

public class JsonValueProcessorImplTest implements JsonValueProcessor {
	private String format = "yyyy-MM-dd";

	
	public JsonValueProcessorImplTest() {
		super();
	}

	public JsonValueProcessorImplTest(String format) {
		super();
		this.format = format;
	}

	@Override
	public Object processArrayValue(Object value, JsonConfig jsonConfig) {
		String[] obj = {};
		if (value instanceof Date[]) {
			SimpleDateFormat sf = new SimpleDateFormat(format);
			Date[] dates = (Date[]) value;
			obj = new String[dates.length];
			for (int i = 0; i < dates.length; i++) {
				obj[i] = sf.format(dates[i]);
			}
		}
		return obj;
	}

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

	public String getFormat() {
		return format;
	}

	public void setFormat(String format) {
		this.format = format;
	}

}

 

通过如上方式我们就可以把含date类型的javabean在javabean和json格式中相互转化了