Java - 使用Scanner读取大文本文件

Question

我有一个非常大的文本文件，其中包含客户信息。我想从文本文件中读取所有客户信息。

这就是我的文本文件的组织方式：

Costomer 1:
Name: 
Erik Andersson
Adress:
Street1
Phone number:
085610540

Costomer 2:
Name: 
Lars Larsson
Adress:
Street1
Phone number:
085610540

我希望能够读取所有客户信息。有什么好的办法吗？我读过有关扫描仪和图案的内容，想知道在这种情况下使用它们是否是个好主意？我的文本文件非常大，包含数百个客户。

有人知道我如何从文本文件中读取所有信息吗？我创建了一个带有客户变量的类，我只需要帮助读取文本文件。我想以有组织的方式阅读信息。

非常感谢所有帮助。

Answer 1

像这样：

public void getEmployees(File f) throws Exception {
    // An ArrayList of your Employee-Object to hold multiple Employees
    ArrayList<Employee> employees = new ArrayList<Employee>();
    // The reader to read from your File
    BufferedReader in = new BufferedReader(new FileReader(f.getAbsolutePath()));
    // This will later contain one single line from your file
    String line = "";

    // Temporary fields for the constructor of your Employee-class
    int number;
    String name;
    String adress;
    String phone;

    // Read the File untill the end is reached (when "readLine()" returns "null")
    // the "line"-String contains one single line from your file.
    while ( (line = in.readLine()) != null ) {
        // See if your Line contains the Customers ID:
        if (line.startsWith("Customer")) {
            // Parse the number to an "int" because the read value
            // is a String.
            number = Integer.parseInt(s.substring("Customer ".length()).substring(0,s.indexOf(':')));
        } else if (line.startsWith("Adress:")) {
            // The Adress is noted in the next line, so we
            // read the next line:
            adress = in.readLine();
        } else if (line.startsWith("Phone number:")) {
            // Same as the Adress:
            phone = in.readLine();
        } else if (line.startsWith("Name:")){
            // Same as the Adress:
            name = in.readLine();
        } else if ( line.equals("") ){
            // The empty line marks the end of one set of Data
            // Now we can create your Employee-Object with the
            // read values:
            employees.add(new Employee(number,name,adress,phone));      
        }
    }
    // After we processed the whole file, we return the Employee-Array
    Employee[] emplyeeArray = (Employee[])employees.toArray();
}

请给+1并更正你的硬件哈哈

Answer 2

作为stas答案的一个小扩展：

最初发布的代码不起作用，因为继续 跳过当前循环迭代。因此，除非该行以 "" 开头，否则不会执行任何操作。