如何在Java中的不同行上多次写入文本文档?

时间:2013-10-18 20:49:25

标签: java

所以,最近,我的父亲让我做了一个涉及收集用户名,密码等的项目,这样他就可以设置一个位置来查找他的所有登录信息。

我有一个程序可以在每次运行程序时成功收集信息并写入新的文本文件。我的目标是使信息存储在SAME文件中,但每组信息之间有一个空格。

这是我的代码(我道歉,我只有14岁):

package com.src.java;

import java.io.IOException;
import java.io.PrintWriter;

import java.net.MalformedURLException;

import javax.swing.JOptionPane;
import javax.swing.JTextField;
import javax.swing.UIManager;

public class Info {

    public static void main(String args[]) throws MalformedURLException,
            IOException, InterruptedException {
        boolean run = true;
        while (run) {
            JTextField companyName = new JTextField();
            JTextField userName = new JTextField();
            JTextField password = new JTextField();
            JTextField accountNumber = new JTextField();
            JTextField phoneNumber = new JTextField();
            JTextField address = new JTextField();

            UIManager.put("OptionPane.cancelButtonText", "Exit");
            UIManager.put("OptionPane.okButtonText", "Create File");
            Object[] message = { "Company name: ", companyName, "Username:",
                    userName, "Password:", password, "Account number:",
                    accountNumber, "Phone number:", phoneNumber, "Address:",
                    address, };
            int option = JOptionPane.showConfirmDialog(null, message,
                    "Fill out your info...", JOptionPane.OK_CANCEL_OPTION);
            if (option == JOptionPane.OK_OPTION) {
                String cN = companyName.getText();
                String uN = userName.getText();
                String pw = password.getText();
                String aN = accountNumber.getText();
                String pN = phoneNumber.getText();
                String ad = address.getText();

                PrintWriter writer = new PrintWriter(cN + ".txt", "UTF-8");

                writer.println("Company name: " + cN);
                writer.println("User name: " + uN);
                writer.println("Password: " + pw);
                writer.println("Account number: " + aN);
                writer.println("Phone number: " + pN);
                writer.println("Address " + ad);
                writer.close();

                System.out.println("Wrote file: " + cN + ".txt");
                Thread.sleep(500);
            } else {
                System.exit(0);
            }
        }
    }
}

2 个答案:

答案 0 :(得分:1)

您要写入的文件名随着输入的公司名称而变化。硬编码文件名。

另外,将追加模式设为真......

答案 1 :(得分:1)

如果要写入同一文件,可以在追加模式下打开,所以

new PrintWriter(new FileOutputStream(new File(filename),true));

true以附加模式打开文件