含有Date和Timestamp的Java和Json互相转化

工程

代码

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());

    }

}