互联网程序基础--第1讲 Java图形窗口程序设计

教学与实践目的： 回顾、熟悉和掌握Java图形界面的设计及标准输入输出方法，为后续编程任务奠定基础。

说明： 在Java体系中，最常用的图形界面设计库主要是Swing和JavaFX，本课程使用JavaFX，采用手写代码方式创建窗体界面，建议的jdk版本为jdk8（因为jdk8已经内置javaFX库，后续版本被剥离，需要额外下载jar包），https://oc.gdufs.edu.cn教学资源站点可下载JDK8。

//我太懒了，懒得把文档全部放上来，直接上代码吧

SimpleFX

package chapter01;

import javafx.stage.FileChooser;

import java.io.File;
import java.io.FileOutputStream;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.util.Scanner;

public class TextFileIO
{
    private PrintWriter pw;
    private Scanner sc;
    public TextFileIO()
    { }
    public void append(String msg)
    {
        //内容添加到文件中，文件通过对话框确定
        FileChooser fileChooser = new FileChooser();
        File file = fileChooser.showSaveDialog(null);
        //用户放弃操作则返回
        if(file == null) return;
        try
        {
            //追加模式utf-8的编码模式写到文件中
            pw= new PrintWriter(new OutputStreamWriter(new FileOutputStream(file,true),"utf-8"));
            pw.println(msg);
        }
        catch (Exception e)
        {
            e.printStackTrace();
        }
        finally
        {
            pw.close();
        }
    }
    public String load()
    {
        FileChooser fileChooser = new FileChooser();
        File file = fileChooser.showSaveDialog(null);
        //用户放弃操作则返回
        if(file == null) return null;
        StringBuilder sb = new StringBuilder();
        try
        {
            //读写编码保持一致
            sc = new Scanner(file,"utf-8");
            while(sc.hasNext())
            {
                //补上行读取的行末尾回车
                sb.append(sc.nextLine()+"n");
            }
        }
        catch (Exception e)
        {
            e.printStackTrace();
        }
        finally
        {
            sc.close();
        }
        return sb.toString();
    }
}

TextFlieIO

package chapter01;

import javafx.stage.FileChooser;

import java.io.File;
import java.io.FileOutputStream;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.util.Scanner;

public class TextFileIO
{
    private PrintWriter pw;
    private Scanner sc;
    public TextFileIO()
    { }
    public void append(String msg)
    {
        //内容添加到文件中，文件通过对话框确定
        FileChooser fileChooser = new FileChooser();
        File file = fileChooser.showSaveDialog(null);
        //用户放弃操作则返回
        if(file == null) return;
        try
        {
            //追加模式utf-8的编码模式写到文件中
            pw= new PrintWriter(new OutputStreamWriter(new FileOutputStream(file,true),"utf-8"));
            pw.println(msg);
        }
        catch (Exception e)
        {
            e.printStackTrace();
        }
        finally
        {
            pw.close();
        }
    }
    public String load()
    {
        FileChooser fileChooser = new FileChooser();
        File file = fileChooser.showSaveDialog(null);
        //用户放弃操作则返回
        if(file == null) return null;
        StringBuilder sb = new StringBuilder();
        try
        {
            //读写编码保持一致
            sc = new Scanner(file,"utf-8");
            while(sc.hasNext())
            {
                //补上行读取的行末尾回车
                sb.append(sc.nextLine()+"n");
            }
        }
        catch (Exception e)
        {
            e.printStackTrace();
        }
        finally
        {
            sc.close();
        }
        return sb.toString();
    }
}