Java object和Base64字符串互相转换

最近想把一些Java对象 保存进数据库的某个字段里，到需要的时候一读出来就直接可以用了。
查找了一下网上的资料，都是关于Object.toString()的，于是自己动手丰衣足食。用ObjectOutputStream 和 ObjectInputStream.

import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.PipedInputStream;
import java.io.PipedOutputStream;
import java.io.Serializable;

class myObj implements Serializable{
    public String name;
    public int amount;

    public myObj(String n, int a){
        name = n;
        amount =a;
    }

    public String toString(){
        return name + ": " + amount;
    }
}
public class Test{

    public static String objectToString(Object o) throws Exception {

        PipedInputStream pis = new PipedInputStream();
        PipedOutputStream pos = new PipedOutputStream(pis);

        ObjectOutputStream oos = new ObjectOutputStream(pos);
        oos.writeObject(o);
        oos.close();

        int count = pis.available();
        byte[] buf = new byte[count];
        pis.read(buf);
        pis.close();
        pos.close();

        return Base64.getBase64(buf);
    }

    public static Object stringToObject(String s) throws Exception {
        byte[] buf = Base64.base64ToByte(s);

        PipedInputStream pis = new PipedInputStream();
        PipedOutputStream pos = new PipedOutputStream(pis);
        pos.write(buf);

        ObjectInputStream ois = new ObjectInputStream(pis);
        Object o = ois.readObject();
        ois.close();
        pis.close();
        pos.close();

        return o;
    }

    public static void main(String[] args) throws Exception {
//        Stream s = Files.lines(Paths.get("C:\\Users\\Ems\\Documents\\莲师消除障道祈请颂.txt"));
//        s.filter(line -> !line.trim().equals(""))
//        .forEach(line -> System.out.println(line));
//        s.close();
//        PipedInputStream pis = new PipedInputStream();
//        PipedOutputStream pos = new PipedOutputStream(pis);
//
//        ObjectOutputStream oos = new ObjectOutputStream(pos);
//        oos.writeObject(new myObj("Emerson", 1000000));
//
//        ObjectInputStream ois = new ObjectInputStream(pis);
//        myObj mo = (myObj) ois.readObject();

        String hey = objectToString(new myObj("Emerson", 1000000));
        System.out.println(hey);

        myObj mo = (myObj) stringToObject(hey);

        System.out.println(mo.toString());
    }

}

运行结果：

rO0ABXNyAAVteU9iaunFwI4Djwo8AgACSQAGYW1vdW50TAAEbmFtZXQAEkxqYXZhL2xhbmcvU3Ry
aW5nO3hwAA9CQHQAB0VtZXJzb24=
Emerson: 1000000

附上 Base64.java

import java.io.UnsupportedEncodingException;

import sun.misc.*;

public class Base64 {
    // 加密
    public static String getBase64(String str) {
        byte[] b = null;
        String s = null;
        try {
            b = str.getBytes("utf-8");
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        }
        if (b != null) {
            s = new BASE64Encoder().encode(b);
        }
        return s;
    }

    public static String getBase64(byte[] b) {
        String s = null;

        if (b != null) {
            s = new BASE64Encoder().encode(b);
        }
        return s;
    }

    // 解密
    public static byte[] base64ToByte(String s) {
        byte[] b = null;
        if (s != null) {
            BASE64Decoder decoder = new BASE64Decoder();
            try {
                b = decoder.decodeBuffer(s);
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
        return b;
    }

    // 解密
    public static String getFromBase64(String s) {
        byte[] b = null;
        String result = null;
        if (s != null) {
            BASE64Decoder decoder = new BASE64Decoder();
            try {
                b = decoder.decodeBuffer(s);
                result = new String(b, "utf-8");
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
        return result;
    }
}