java - 从输入流读取并添加到 stringbuilder

Question

private void readIncomingMessage() {
    try {
        StringBuilder builder = new StringBuilder();
        InputStream is = socket.getInputStream();
        int length = 1024;
        byte[] array = new byte[length];
        int n = 0;

        while ((n = is.read(array, n, 100)) != -1) {
            builder.append(new String(array));

            if (checkIfComplete(builder.toString())) {
                buildListItems(builder.toString(), null);
                builder = new StringBuilder();
            }
        }

    } catch (IOException e) {
        Log.e("TCPclient", "Something went wrong while reading the socket");
    }
}

嗨，

我想读取每个 100 字节 block 的流，将这些字节转换为字符串，然后查看该字符串是否符合某些条件。

但是当我调试时，我看到构建器的计数为 3072。
我看到一个字符串，如 (text, , , , , , , , , , text , , , , , , , , , text)
如何将文本添加到字符串生成器？

谢谢:)

 private void readIncomingMessage() {
    try {
        StringBuilder builder = new StringBuilder();
        InputStream is = socket.getInputStream();
        int length = 100;
        byte[] array = new byte[length];
        int n = 0;

        while ((n = is.read(array, 0, length)) != -1) {
            builder.append(new String(array, 0, n));

            if (checkIfComplete(builder.toString())) {
                buildListItems(builder.toString(), null);
                builder = new StringBuilder();
            }
        }

    } catch (IOException e) {
        Log.e("TCPclient", "Something went wrong while reading the socket");
    }
}

这个解决方案对我有用。这个解决方案有什么缺点吗？

Answer 1

2个问题:

1. 将字节转换为字符串时需要使用'n'值。具体来说，使用这个 String 构造函数 String(byte[] bytes, int offset, int length)
2. 当在任意边界上将字节转换为字符串时，就像您所做的那样，您有可能损坏多字节字符。如果 'is' 最好在顶部放置一个 InputStreamReader 并从中读取字符。