java swing实现简单图片显示(测试生成图片快捷方式)

来源：互联网发布：jackson 数组转json 编辑：程序博客网时间：2024/05/20 23:39
package com.ts.x;import java.awt.Image;import java.awt.image.BufferedImage;import java.io.ByteArrayOutputStream;import java.io.InputStream;import java.net.URL;import java.util.Hashtable;import javax.swing.Icon;import javax.swing.ImageIcon;import javax.swing.JFrame;import javax.swing.JLabel;import com.google.zxing.BarcodeFormat;import com.google.zxing.EncodeHintType;import com.google.zxing.MultiFormatWriter;import com.google.zxing.common.BitMatrix;public class SwingTestImg  extends JFrame{private static final long serialVersionUID = 1L;private JLabel label;private Icon icon;private Image image;public static void main(String[] args) {new SwingTestImg();}public SwingTestImg(){try{setTitle("测试图片简单显示");setSize(300,300);setDefaultCloseOperation(DISPOSE_ON_CLOSE);label = new JLabel();add(label);setVisible(true);//A：网路URL图片//icon = new ImageIcon(new URL("http://tp1.sinaimg.cn/3223061260/180/5659068018/1"));//B：项目目录下图片//InputStream is = SwingTestImg.class.getResourceAsStream("twodimensioncode.gif");//ByteArrayOutputStream baos = new ByteArrayOutputStream();//byte [] buff = new byte[100];//int readCount = 0;//while((readCount = is.read(buff,0,100)) > 0){//baos.write(buff,0,readCount);//}//byte [] inbyte = baos.toByteArray();//icon =  new ImageIcon(inbyte);////C：本地磁盘图片，图片太大，会导致空白显示//image =  new ImageIcon("D:/1.png").getImage();//D：代码生成的BufferedImage二维码图片Hashtable hints = new Hashtable();hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");BitMatrix matrix = new MultiFormatWriter().encode("http://www.vcspark.com/", BarcodeFormat.QR_CODE, 300, 300,hints);int width = matrix.getWidth();int height = matrix.getHeight();BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);for(int x = 0;x < width; x++){for(int y = 0;y < height; y++){image.setRGB(x, y, matrix.get(x, y) ? 0xFF000000 : 0xFFFFFFFF);}}icon = new ImageIcon(image);}catch(Exception e){System.out.println("初始化失败"+e.getMessage());e.printStackTrace();}label.setIcon(icon);//label.setIcon(new ImageIcon(image));} }
测试二维码生成结果：
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