...
byte[] bufferBytes = new byte[1024];
StringBuffer stringBuilder = new StringBuffer();
try {
int length = 0;
while ((length = inputStream.read(bufferBytes)) != -1) {
stringBuilder.append(new String(bufferBytes));
}
} catch (IOException e) {
e.printStackTrace();
}
...
之前读小文件没啥问题，就这么用了，今天读json文件比较大的在读取的时候出现问题了
原因：因为每次 while 循环后 bufferBytes 不会清空，仍然会存在缓存上一次的数据，如果直接 bufferBytes 整个拿来 append 用，数据就错乱了，所以必须要拿每次真实读到的内容进行使用，或者套一层 BufferedReader 进行处理
- 方法1：append 时候紧跟上指定长度
...
byte[] bufferBytes = new byte[1024];
StringBuffer stringBuilder = new StringBuffer();
try {
int length = 0;
while ((length = inputStream.read(bufferBytes)) != -1) {
stringBuilder.append(new String(bufferBytes, 0, length));
}
} catch (IOException e) {
e.printStackTrace();
}
...
- 方法二：采用 bufferedReader.readLine 方式去读
try {
fileInputStream = new FileInputStream(file);
inputStreamReader = new InputStreamReader(fileInputStream);
bufReader = new BufferedReader(inputStreamReader);
String line = "";
while ((line = bufReader.readLine()) != null) {
stringBuilder.append(line);
}
} catch (IOException e) {
e.printStackTrace();
}
