java里面byte数组和String字符串怎么转换

//string 转 byte[]

String str = "Hello";

byte[] srtbyte = str.getBytes();

// byte[] 转 string

String res = new String(srtbyte);

System.out.println(res);


//当然还有可以设定编码方式
的

String str = "hello";

byte[] srtbyte = null;

try {

	srtbyte = str.getBytes("UTF-8");

	String res = new String(srtbyte,"UTF-8");

	System.out.println(res);

    } catch (UnsupportedEncodingException e) {

	// TODO Auto-generated catch block

	e.printStackTrace();

    }