[英]Why my method don't read all of my File? … Java?
I have to display all of records in my blocks (text files), and do a split to "cover" the Fields Separators, but only the first record of my blocks are diplayed. 我必须显示块(文本文件)中的所有记录,并进行拆分以“覆盖”字段分隔符,但是只显示了块的第一条记录。 What am I doing wrong? 我究竟做错了什么?
enter code here
public static void listAllStudents() throws IOException {
File path = new File(Descriptor.getBlockPath());
for (int i = 0; i < path.listFiles().length; i++) {
try {
FileInputStream file = new FileInputStream(Descriptor.getBlockPath() + "BLK" + i + ".txt");
InputStreamReader entrada = new InputStreamReader(file);
BufferedReader buf= new BufferedReader(entrada);
String piece = " ";
System.out.println("\nBLOCO " + i + " ------------------------------------------------------ +");
do {
if (buf.ready()) {
piece = buf.readLine();
System.out.println("\n¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨");
String string = " ", field[] = piece.split(Descriptor.getFieldSeparator());
string = " ";
System.out.println("CPF: " + field[0]);
System.out.println("Name: " + field[1]);
System.out.println("Course: " + field[2]);
System.out.println("Age: " + field[3]);
System.out.println("Phone: " + field[4]);
System.out.println("Active: " + field[5]);
string = " ";
}
} while (buf.ready());
buf.close();
} catch (IOException e) {
System.out.println();
}
}
}
See the documentation for the BufferedReader.readLine() method : 请参阅BufferedReader.readLine()方法的文档:
or null if the end of the stream has been reached 如果已到达流的末尾,则返回null
Then change your code to read the file line by line: 然后更改代码以逐行读取文件:
while ((piece = buf.readLine()) != null) {
String field[] = piece.split(Descriptor.getFieldSeparator());
if (field.length >= 6) {
System.out.println("CPF: " + field[0]);
System.out.println("Name: " + field[1]);
System.out.println("Course: " + field[2]);
System.out.println("Age: " + field[3]);
System.out.println("Phone: " + field[4]);
System.out.println("Active: " + field[5]);
}
}
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