自己总结一下Java文件的读取类似数组数据的方法，自己可以快速查看。
一、规整化数据：
对于数组数据是一一对应的情况
ArrayList<String> arrayList = new ArrayList<>();
try {
File file = new File(path);
InputStreamReader input = new InputStreamReader(new FileInputStream(file));
BufferedReader bf = new BufferedReader(input);
// 按行读取字符串
String str;
while ((str = bf.readLine()) != null) {
arrayList.add(str);
}
bf.close();
input.close();
} catch (IOException e) {
e.printStackTrace();
}
// 对ArrayList中存储的字符串进行处理
int length = arrayList.size();
int width = arrayList.get(0).split(" ").length;
int array[][] = new int[length][width];
for (int i = 0; i < length; i++) {
for (int j = 0; j < width; j++) {
String s = arrayList.get(i).split(" ")[j];
array[i][j] = Integer.parseInt(s);
}
}
for (int i = 0; i < length; i++) {
for (int j = 0; j < width; j++) {
System.out.print(array[i][j] + " ");
}
System.out.println();
}
二、非规整化数据：
private static void file(String fileName) throws Exception {
int array[][] = new int[1024][1024];
File file = new File(fileName);
Scanner sc = new Scanner(file);
String[] odd = new String[40]; // 奇数行数据
String[] even = new String[40]; // 偶数行数据
int length = 0;
int column = 0;
int rows = 1;
while (sc.hasNextLine()) {
if ((rows % 2) == 1) { // 奇数行
odd = sc.nextLine().split("\\s{1,}"); // split("\\2{1,}");不论字符中间有多少个空格都当作一个空格处理
for (int i = 0; i < odd.length-1; i++) {
array[length][i] = Integer.parseInt(odd[i]);
}
} else if ((rows % 2) == 0) { // 偶数行
even = sc.nextLine().split("\\s{1,}");
for (int i = 0; i < even.length-1; i++) {
array[length][i] = Integer.parseInt(even[i]);
}
}
if (rows == 2) {
column = even.length;
}
length++;
rows++;
}
sc.close();
for (int i = 0; i < length; i++) {
for (int j = 0; j < column; j++) {
System.out.print(array[i][j] + " ");
}
System.out.println();
}
}