package com.my.json.helper;

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 zhangyi

 *

 */

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);

    }

}

package com.my.json.helper;

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 zhangyi

 *

 */

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);

    }

}

package com.my.json.helper;

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();

    }

}

package com.my.json.helper;

import java.sql.Timestamp;

public class Student {

    private int id;

    private String name;

    private int age;

    private Timestamp birthday;

    public int getId() {

        return id;

    }

    public void setId(int id) {

        this.id = id;

    }

    public String getName() {

        return name;

    }

    public void setName(String name) {

        this.name = name;

    }

    public int getAge() {

        return age;

    }

    public void setAge(int age) {

        this.age = age;

    }

    public Timestamp getBirthday() {

        return birthday;

    }

    public void setBirthday(Timestamp birthday) {

        this.birthday = birthday;

    }

}

package com.my.json.helper;

import java.sql.Timestamp;

public class JsonTest {

    public static void main(String[] args) {

        Student s = new Student();

        s.setId(123456);

        s.setName("李四");

        s.setAge(20);

        Timestamp b = Timestamp.valueOf("1992-10-19 23:52:18");//设置Timestamp、Date类型的值

        s.setBirthday(b);

        //含有Timestamp、Date的bean转化为Json

        String jsonStr = Util.beanToJson(s,"yyyy-MM-dd HH:mm:ss");

        System.out.println(jsonStr);

        //json转为bean（含有Timestamp、Date）

        Student s1 = (Student)Util.jsonToBean(jsonStr,Student.class);

        System.out.println(s1.getBirthday().toLocaleString());

    }

}