Java 将值从数组传递到新对象实例

Question

我在将数组值传递给构造函数时遇到一些问题。我有一个 file.txt 其中包含一些带有值的行，例如:

peter|berlin|germany|0930295235|foo.

我弄清楚了如何将行转换为数组。但我不知道如何将数组中的值传递给构造函数，以将数组转换为具有数组属性的对象。

这是主类:

import java.io.BufferedReader;
import java.io.DataInputStream;
import java.io.FileInputStream;
import java.io.InputStreamReader;


public class FileReader {

    public static void main(String[] args) {
        try {
            // Open the file that is the first 
            // command line parameter
            FileInputStream fstream = new FileInputStream("file.txt");
            // Get the object of DataInputStream
            DataInputStream in = new DataInputStream(fstream);
            BufferedReader br = new BufferedReader(new InputStreamReader(in));
            String strLine;

            // Read the file line by line
            while ((strLine = br.readLine()) != null) {
                // Print the content on the console
                String s[] = strLine.split("\\|");
                // System.out.println(java.util.Arrays.toString(s));
                // System.out.println (strLine);
                for (String element : s) {
                    System.out.println(element);
                    // HERE I NEED TO PASS THE ARRAY VALUES FOR EACH LINE TO TRANSFORM THE ARRAYS TO OBJECTS
                    Item item = new Item(element,element,element,element,element);
                    System.out.println("*************************************");
                }
                // Close the input stream
                in.close();
            } catch (Exception e) { //Catch exception if any
                System.err.println("Error: " + e.getMessage());
        }
    }
}

这是类 Item:

public class Item {

    private String name;
    private String city;
    private String state;
    private String number;
    private String foo;

    public Object(String name, String city, String state, String number,String foo){
        this.name = name;
        this.city = city;
        this.state = state;
        this.number = number;
        this.foo = foo; 
    }

    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public String getCity() {
        return city;
    }
    public void setCity(String city) {
        this.city = city;
    }
    public String getState() {
        return state;
    }
    public void setState(String state) {
        this.state = state;
    }
    public String getNumber() {
        return number;
    }
    public void setNumber(String number) {
        this.number = number;
    }
    public String getFoo() {
        return foo;
    }
    public void setFoo(String foo) {
        this.foo = foo;
    }
}

我需要对象来进行更多数据处理。我感谢任何帮助。

Answer 1

我认为您想要做的事情类似于以下内容，尽管并不完全清楚。

String s[] = strLine.split("\\|");
Item item = new Item(s[0], s[1], s[2], s[3], s[4]);

另请注意，在创建新的 Item 对象后，它几乎会立即超出范围，因此您需要将其存储在 while 之外声明的某种容器中 循环:

List<Item> items = new ArrayList<Item>();
String line;

while((line = br.readLine()) != null) {
    String[] words = line.split("\\|");
    Item item = new Item(words[0], words[1], words[2], words[3], words[4]);
    items.add(item);
}