字符串轉換爲字節，並再次

Question

我有一個字符串cityName我解碼成字節如下：

byte[] cityBytes = cityName.getBytes("UTF-8");

...某處存儲字節。當我檢索這些字節時，我怎樣才能將它們解碼回字符串？

Answer 1

使用String(byte[], Charset)或String(byte[], String)構造函數。

byte[] rawBytes = /* whatevs */ 

try 
{ 
    String decoded = new String(rawBytes, Charset.forName("UTF-8")); 
    // or 
    String decoded = new String(rawBytes, "UTF-8"); 
    // best, if you're using Java 7 (thanks to @ColinD): 
    String decoded = new String(rawBytes, StandardCharsets.UTF_8); 
} 
catch (UnsupportedEncodingException e) 
{ 
    // see http://stackoverflow.com/a/6030187/139010 
    throw new AssertionError("UTF-8 not supported"); 
} 

Answer 2

的String class具有接受字節，包括one that takes an array of bytes and a String representation of a charset和another that takes a Charset object的陣列的幾個構造函數。如果String只是字節數組的一小部分，還有構造函數將String的偏移量和長度作爲參數。

Answer 3

像這樣：

String cityName = new String(cityByte,"UTF-8"); 

Answer 4

String s = new String(cityByte, "UTF-8");

Answer 5

試試這個：http://docs.oracle.com/javase/6/docs/api/java/lang/String.html

String(byte[] bytes, String charsetName)