在Java中，我有一个字符串，想将其编码为字节数组（UTF8或其他编码）。另外，我有一个字节数组（使用某种已知编码），想将其转换为Java字符串。如何进行这些转换？
以下是示例代码：
将字符串编码为字节数组：
String str = "Hello, world!";
byte[] bytes = str.getBytes("UTF-8");
将字节数组转换为字符串：
byte[] bytes = new byte[]{72, 101, 108, 108, 111, 44, 32, 119, 111, 114, 108, 100, 33};
String str = new String(bytes, "UTF-8");
Reader reader = new BufferedReader(
new InputStreamReader(
new ByteArrayInputStream(
string.getBytes(StandardCharsets.UTF_8)), StandardCharsets.UTF_8));
//query is your json
DefaultHttpClient httpClient = new DefaultHttpClient();
HttpPost postRequest = new HttpPost("http://my.site/test/v1/product/search?qy=");
StringEntity input = new StringEntity(query, "UTF-8");
input.setContentType("application/json");
postRequest.setEntity(input);
HttpResponse response=response = httpClient.execute(postRequest);
非常晚，但我刚遇到了这个问题，这是我的解决方法：
private static String removeNonUtf8CompliantCharacters( final String inString ) {
if (null == inString ) return null;
byte[] byteArr = inString.getBytes();
for ( int i=0; i < byteArr.length; i++ ) {
byte ch= byteArr[i];
// remove any characters outside the valid UTF-8 range as well as all control characters
// except tabs and new lines
if ( !( (ch > 31 && ch < 253 ) || ch == '\t' || ch == '\n' || ch == '\r') ) {
byteArr[i]=' ';
}
}
return new String( byteArr );
}