string 和 byte[]转化

[poorjack]

比如：
string str1 = "1234"
string str2 = ""
byte[] b;
现要求把str1转化到b,然后再从b转化为string类型str2,分别是什么函数？

[cherami]

b=str1.getBytes();
str2=String.valueOf(b);

[jsyx]

java.lang Class String
byte[] getBytes()
Convert this String into bytes according to the platform's default character encoding, storing the result into a new byte array.

static String copyValueOf(char[] data)
Returns a String that is equivalent to the specified character array.

[hexiaofeng]

b=str1.getBytes();
str2=String.valueOf(b); or str2 = new String(b);