流程
- 调用
java.util.*
- 分别创建
FileReader
、BufferReader
、StringBuilder
对象 - 当不为空时逐行读取
示例代码
File file = new File(fileName);
FileReader reader = new FileReader(file);
BufferedReader bReader = new BufferedReader(reader);
StringBuilder sb = new StringBuilder();
String line = "";
while ((line = bReader.readLine()) != null) {
...
}