JavaFX 图像转字符串图画

JavaFX 图像转字符串图画

思路：根据每个坐标像素的RGB值不一样设置不同的字符。颜色深的像素(RGB值越小), 设置越粗的字符。

String clist = "■★◆✪◐◔@#$%&*9876543210~ ";

当然了，受字符缩小的影响（字符一般是长方形的），且每个字符不一定是方块的，转换成字符串图画会被拉伸且很大。所以原图片不要太大(可以适当纵向压缩)，太大屏幕都装不下了，为了使效果更好，图片的颜色层次分明是最好的。

先看看效果图：

   

原图1 字符串图画1 字符串图画1

源码：
FileCho.fxml

FileChoControl.java

import java.awt.Desktop;
import java.awt.EventQueue;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStreamWriter;

import javafx.event.EventHandler;
import javafx.fxml.FXML;
import javafx.scene.control.Button;
import javafx.scene.image.Image;
import javafx.scene.image.ImageView;
import javafx.scene.image.PixelReader;
import javafx.scene.input.MouseEvent;
import javafx.scene.paint.Color;
import javafx.stage.FileChooser;

public class FileChoControl {
    @FXML
    private Button choosefileButton;
    @FXML
    private ImageView imageView;
    @FXML
    private Button strimgButton;
    
    private final Desktop desktop = Desktop.getDesktop();
    private String clist = "■★◆✪◐◔@#$%&*9876543210~ ";//转化的字符
    private File strimg;

    @FXML
    private void initialize() {
        //给两个按钮增加事件处理器
        choosefileButton.addEventHandler(MouseEvent.MOUSE_CLICKED, new EventHandler() {
            @Override
            public void handle(MouseEvent event) {
                // TODO Auto-generated method stub);
                FileChooser fileChooser = new FileChooser();
                fileChooser.setTitle("请选择一个图片文件");
                fileChooser.setInitialDirectory(new File("C:\\Users\\Public\\Pictures"));
                fileChooser.getExtensionFilters().addAll(new FileChooser.ExtensionFilter("PNG", "*.png"), new FileChooser.ExtensionFilter("JPG", "*.jpg"),
                        new FileChooser.ExtensionFilter("JPEG", "*.jpeg"));
                File file = fileChooser.showOpenDialog(Main.primaryStage);
                if (file != null) {
                    openFile(file);
                }
            }
        });
        strimgButton.addEventHandler(MouseEvent.MOUSE_CLICKED, new EventHandler() {
            @Override
            public void handle(MouseEvent event) {
                try {
                    desktop.open(strimg);
                } catch (IOException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            }
        });
    }
    
    private void openFile(File file) {
        EventQueue.invokeLater(() -> {
            String url = file.toURI().toString();
            Image image = new Image(url);
            imageView.setImage(image);
            strimgButton.setDisable(false);
            PixelReader pixelReader =  image.getPixelReader();//读取图片像素
            StringBuffer sBuffer = new StringBuffer();
            for(int i = 0; i < image.getHeight(); i++){
                for(int j = 0; j < image.getWidth(); j++){
                    Color  color = pixelReader.getColor(j, i);//get指定坐标像素的颜色, 方向每一行读完换下一行   
                    int redValue = (int)(color.getRed() * 255);
                    sBuffer.append(getChar(redValue));
                }
                sBuffer.append("\r\n");
            }
            strimg = new File("D:/strimg.txt");
            try {
                FileOutputStream fOutputStream = new FileOutputStream(strimg);
                OutputStreamWriter oStreamWriter = new OutputStreamWriter(fOutputStream);
                BufferedWriter bufferedWriter = new BufferedWriter(oStreamWriter);
                bufferedWriter.write(sBuffer.toString());
                bufferedWriter.close();
                oStreamWriter.close();
                fOutputStream.close();
                
            } catch (FileNotFoundException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        });
        
    }
    
    private char getChar(int value){
        if(value >= 0 && value < 10){
            return clist.charAt(0);
        }else if(value >= 10 && value < 20){
            return clist.charAt(1);
        }else if(value >= 20 && value < 30){
            return clist.charAt(2);
        }else if(value >= 30 && value < 40){
            return clist.charAt(3);
        }else if(value >= 40 && value < 50){
            return clist.charAt(4);
        }else if(value >= 50 && value < 60){
            return clist.charAt(5);
        }else if(value >= 60 && value < 70){
            return clist.charAt(6);
        }else if(value >= 70 && value < 80){
            return clist.charAt(7);
        }else if(value >= 80 && value < 90){
            return clist.charAt(8);
        }else if(value >= 100 && value < 110){
            return clist.charAt(9);
        }else if(value >= 110 && value < 120){
            return clist.charAt(10);
        }else if(value >= 120 && value < 130){
            return clist.charAt(11);
        }else if(value >= 130 && value < 140){
            return clist.charAt(12);
        }else if(value >= 140 && value < 150){
            return clist.charAt(13);
        }else if(value >= 150 && value < 160){
            return clist.charAt(14);
        }else if(value >= 160 && value < 170){
            return clist.charAt(15);
        }else if(value >= 170 && value < 180){
            return clist.charAt(16);
        }else if(value >= 180 && value < 190){
            return clist.charAt(17);
        }else if(value >= 190 && value < 200){
            return clist.charAt(18);
        }else if(value >= 200 && value < 210){
            return clist.charAt(19);
        }else if(value >= 210 && value < 220){
            return clist.charAt(20);
        }else if(value >= 220 && value < 230){
            return clist.charAt(21);
        }else if(value >= 230 && value < 240){
            return clist.charAt(22);
        }else{
            return clist.charAt(23);
        }
    }
}

Main.java 

import java.io.IOException;

import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.scene.Scene;
import javafx.scene.layout.AnchorPane;
import javafx.stage.Stage;


public class Main extends Application {
    private AnchorPane rootLayout;
    public static Stage primaryStage;

     
    @Override
    public void start(Stage primaryStage) {
        primaryStage.setTitle("图片转字符串画");
        FXMLLoader loader = new FXMLLoader();
        loader.setLocation(Main.class.getResource("FileCho.fxml"));
        try {
            rootLayout = (AnchorPane) loader.load();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        
            Scene scene = new Scene(rootLayout);
            primaryStage.setScene(scene);
            primaryStage.show();
    }
    
    public static void main(String[] args) {
        launch(args);
    }
}

 Ps:字符串图画的文件我是用Notepad++打开的，记事本打开格式怪怪的而且也不能把字体缩到很小。这个小玩意实现并不难，给自己找点乐趣罢了，(*^▽^*)，(づ￣3￣)づ╭❤～。

项目地址：https://github.com/Cqh-i/StringImage