java读取文件-Java基础，

java读取文件-Java基础，

通过FileReader（基于String的）
或通过FileInputStream（基于字节）
（二者可以相互转换）

FileReader

BufferedReader br = new BufferedReader(new FileReader("file.txt"));
try {
    StringBuilder sb = new StringBuilder();
    String line = br.readLine();

    while (line != null) {
        sb.append(line);
        sb.append(System.lineSeparator());
        line = br.readLine();
    }
    String everything = sb.toString();
} finally {
    br.close();
}

FileInputStream

FileInputStream inputStream = new FileInputStream("foo.txt");
try {
    String everything = IOUtils.toString(inputStream);
} finally {
    inputStream.close();
}

多种方法：怎样将inputStrean转化为String