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在讀取文件並創建.bmp圖像時如何繼續下一行？

[英]How to go on next line while reading the file and creating an .bmp image?

 原文  2016-06-02 10:12:28  6   2    java/ bufferedimage/ graphics2d/ bmp

問題描述

我正在通過Java代碼將.txt文件轉換為.bmp文件。 我的.txt文件包含多行。 我正在閱讀每一行並將其打印在圖像上。

**我的文本文件**

45

werwerwr

abc abc abc

xxx

**正在創建的Image（.bmp）**

一切都像這樣打印在一行中：

45 werwerwrabc abc abc abcxxxx

我的代碼： 

import java.awt.Color;
import java.awt.Font;
import java.awt.FontMetrics;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.image.BufferedImage;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;
import javax.imageio.ImageIO;

public class TextToGraphics {

    public static void main(String[] args) {
        try {
            String storeData = "";
            String data = "";
            File f = new File("/home/vipul/Desktop/123.txt");
            BufferedReader br = new BufferedReader(new FileReader(f));

            while ((data = br.readLine()) != null) {
                storeData =storeData + data +System.lineSeparator();
            }


            BufferedImage img = new BufferedImage(1, 1, BufferedImage.TYPE_3BYTE_BGR);
            Graphics2D g2d = img.createGraphics();
            Font font = new Font("Arial", Font.PLAIN, 24);
            g2d.setFont(font);

            FontMetrics fm = g2d.getFontMetrics();

            int width = fm.stringWidth(storeData);
            int height = fm.getHeight();
            g2d.dispose();

            img = new BufferedImage(width, height, BufferedImage.TYPE_3BYTE_BGR);
            g2d = img.createGraphics();
            g2d.setPaint ( new Color ( 255, 255, 255 ) );
           g2d.fillRect ( 0, 0, img.getWidth(), img.getHeight() );
            System.out.println(img.getWidth()+" "+img.getHeight());
            g2d.setRenderingHint(RenderingHints.KEY_ALPHA_INTERPOLATION, RenderingHints.VALUE_ALPHA_INTERPOLATION_QUALITY);
            g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
            g2d.setRenderingHint(RenderingHints.KEY_COLOR_RENDERING, RenderingHints.VALUE_COLOR_RENDER_QUALITY);
            g2d.setRenderingHint(RenderingHints.KEY_DITHERING, RenderingHints.VALUE_DITHER_ENABLE);
            g2d.setRenderingHint(RenderingHints.KEY_FRACTIONALMETRICS, RenderingHints.VALUE_FRACTIONALMETRICS_ON);
            g2d.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BILINEAR);
            g2d.setRenderingHint(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY);
            g2d.setRenderingHint(RenderingHints.KEY_STROKE_CONTROL, RenderingHints.VALUE_STROKE_PURE);
            g2d.setFont(font);
            fm = g2d.getFontMetrics();


            g2d.setColor(Color.BLACK);


           g2d.drawString(storeData, 0, fm.getAscent());
            g2d.dispose();

            ImageIO.write(img, "bmp", new File("/home/vipul/Desktop/123.bmp"));

        } catch (Exception ex) {
            ex.printStackTrace();
        }

    }

}

我要使圖像與文本文件相同。 如果文本文件轉到換行符，則圖像換行符也應包含相同的單詞。

請幫助。 提前致謝！！！

2 個解決方案

解決方案1
 1 已采納  2016-06-02 12:33:02

您正在將文件保存為字符串。 即使在每行img之后添加lineSeparator，img也不知道換行符是什么。 您必須自己分割數據並為每一行調用drawString。 范例： 

public class TextToGraphics {

public static void main(String[] args) {
    try {
        String storeData = "";
        String data = "";
        File f = new File("/home/vipul/Desktop/123.txt");
        BufferedReader br = new BufferedReader(new FileReader(f));

        while ((data = br.readLine()) != null) {
            storeData =storeData + data +System.lineSeparator();
        }
        String [] sArr = storeData.split("\n");
        int longest =0;
        int lines = 0;
        for (String s : sArr){       //find the longest string
            if(s.length()>longest){
            longest = s.length();
            }
            lines++;              //count lines
        }

        BufferedImage img = new BufferedImage(1, 1, BufferedImage.TYPE_3BYTE_BGR);
        Graphics2D g2d = img.createGraphics();
        Font font = new Font("Arial", Font.PLAIN, 24);
        g2d.setFont(font);

        FontMetrics fm = g2d.getFontMetrics();

        int width = fm.stringWidth(storeData);
        int height = fm.getHeight();
        g2d.dispose();

        img = new BufferedImage(longest*font.getSize(), lines*font.getSize(), BufferedImage.TYPE_3BYTE_BGR); // set width and height in accordance with longest string and number of lines
        g2d = img.createGraphics();
        g2d.setPaint ( new Color ( 255, 255, 255 ) );
       g2d.fillRect ( 0, 0, img.getWidth(), img.getHeight() );
        System.out.println(img.getWidth()+" "+img.getHeight());
        g2d.setRenderingHint(RenderingHints.KEY_ALPHA_INTERPOLATION, RenderingHints.VALUE_ALPHA_INTERPOLATION_QUALITY);
        g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
        g2d.setRenderingHint(RenderingHints.KEY_COLOR_RENDERING, RenderingHints.VALUE_COLOR_RENDER_QUALITY);
        g2d.setRenderingHint(RenderingHints.KEY_DITHERING, RenderingHints.VALUE_DITHER_ENABLE);
        g2d.setRenderingHint(RenderingHints.KEY_FRACTIONALMETRICS, RenderingHints.VALUE_FRACTIONALMETRICS_ON);
        g2d.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BILINEAR);
        g2d.setRenderingHint(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY);
        g2d.setRenderingHint(RenderingHints.KEY_STROKE_CONTROL, RenderingHints.VALUE_STROKE_PURE);
        g2d.setFont(font);
        fm = g2d.getFontMetrics();


        g2d.setColor(Color.BLACK);
        int i = 0;
        for(String s : storeData.split("\n")){            
            g2d.drawString(s, 0, fm.getAscent()+i); // call drawString for each line
            i+=10;
        }
        g2d.dispose();

        ImageIO.write(img, "bmp", new File("/home/vipul/Desktop/123.bmp"));

    } catch (Exception ex) {
        ex.printStackTrace();
    }

}

}

解決方案2
 1  2016-06-02 13:11:52

我找到了解決我問題的方法： 

import java.awt.Color;
import java.awt.Font;
import java.awt.FontMetrics;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.image.BufferedImage;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;
import javax.imageio.ImageIO;

public class TextToGraphics {

    public static void main(String[] args) {
        try {
            int imgWid = 300;
            int imgHei = 300;

            String text = "Hello\nlklkj";
            String storeData = "";
            String data = "";
            File f = new File("/home/vipul/Desktop/123.txt");
            BufferedReader br = new BufferedReader(new FileReader(f));
            int nextLinePosition=100;
            int fontSize = 24;


            //  BufferedImage img = new BufferedImage(1, 1, BufferedImage.TYPE_BYTE_GRAY);//png
            BufferedImage img = new BufferedImage(1, 1, BufferedImage.TYPE_3BYTE_BGR);
            Graphics2D g2d = img.createGraphics();
            Font font = new Font("Arial", Font.PLAIN, fontSize);
            g2d.setFont(font);

            FontMetrics fm = g2d.getFontMetrics();
            // int width = fm.stringWidth(text);
           // int width = fm.stringWidth(storeData);
            int width =imgWid;

           // int height = fm.getHeight();
            int height =imgHei;
            g2d.dispose();

            img = new BufferedImage(width, height, BufferedImage.TYPE_3BYTE_BGR);
     //         img = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
            g2d = img.createGraphics();
            g2d.setPaint(new Color(255, 255, 255));
            g2d.fillRect(0, 0, img.getWidth(), img.getHeight());
            System.out.println(img.getWidth() + " " + img.getHeight());
            g2d.setRenderingHint(RenderingHints.KEY_ALPHA_INTERPOLATION, RenderingHints.VALUE_ALPHA_INTERPOLATION_QUALITY);
            g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
            g2d.setRenderingHint(RenderingHints.KEY_COLOR_RENDERING, RenderingHints.VALUE_COLOR_RENDER_QUALITY);
            g2d.setRenderingHint(RenderingHints.KEY_DITHERING, RenderingHints.VALUE_DITHER_ENABLE);
            g2d.setRenderingHint(RenderingHints.KEY_FRACTIONALMETRICS, RenderingHints.VALUE_FRACTIONALMETRICS_ON);
            g2d.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BILINEAR);
            g2d.setRenderingHint(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY);
            g2d.setRenderingHint(RenderingHints.KEY_STROKE_CONTROL, RenderingHints.VALUE_STROKE_PURE);
            g2d.setFont(font);
            fm = g2d.getFontMetrics();

            g2d.setColor(Color.BLACK);
        //    g2d.setBackground(Color.ORANGE);
            //  g2d.drawString(text, 0, fm.getAscent());
//            for(String line : text.split("\n")){
//            g2d.drawString(storeData, 0, fm.getAscent());
//        }
            //  private void drawString( Graphics2D g2d, String text, int x, int y) {
//            for (String line : storeData.split("\n")) //  g2d.drawString(line, width, height += g2d.getFontMetrics().getHeight());
//            {
             while ((data = br.readLine()) != null) {
                 g2d.drawString(data, 0, nextLinePosition);
              //  storeData = storeData + data + nextLinePosition;
                nextLinePosition=nextLinePosition+fontSize;
                //storeData = storeData + data + '\n';
            } 



//                 g2d.drawString(line, 0, 12);
//            }
            //}

            //  g2d.drawString(storeData, 0, fm.getAscent());
            g2d.dispose();
            //  try {
            ImageIO.write(img, "bmp", new File("/home/vipul/Desktop/123.bmp"));
            //   } 
        } catch (Exception ex) {
            ex.printStackTrace();
        }

    }

}

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