java 如何用datagramsocket 传输字符串数组

可以把数组所有的字节拼装放入一个byte【】中传递。示例代码：

public class Main {
    public static void main(String[] args) {
        String[] datas = {"hello","world","I"};
        try {
            //待发送的数据
            byte[] dataToSend = toByteArray(datas,"utf-8");
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        }
    }

    public static byte[] toByteArray(String[] datas,String charset) throws UnsupportedEncodingException{
        byte[] result = new byte[0];
        if(datas==null||datas.length==0){
            return result; 
        }

        if(charset==null||"".equals(charset)){
            charset = "utf-8";
        }

        //存储数组中每个元素的byte[]字节数据
        List<byte[]> list = new ArrayList<byte[]>();
        //统计字节总长度
        int length = 0;
        for(String data:datas){
            byte[] byteArray = data.getBytes(charset);
            length+=byteArray.length;
            list.add(byteArray);
        }

        //将字符数组的字符串统一放入一个byte字节数组中
        result = new byte[length];
        int index = 0;
        for(int i = 0;i<list.size();i++){
            byte[] byteArray = (byte[])list.get(i);
            int byteLength = byteArray.length;
            System.arraycopy(byteArray, 0, result, index, byteLength);
            index+=byteLength;
        }

        return result;
    }
}