Java绘制图片生成图片文件进行预览

Java绘制图片并实现打印前生成图片文件进行预览, 适用于开发阶段. 如果要使用界面完成预览,请另找资源.
这里用这个功能主要是用于结果预览,因为如果使用打印来进行结果验证,会浪费大量的纸张.

Java代码：

import java.awt.Color;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.Rectangle;
import java.awt.geom.AffineTransform;
import java.awt.image.BufferedImage;
import java.awt.print.PageFormat;
import java.awt.print.Printable;
import java.awt.print.PrinterException;
import java.awt.print.PrinterJob;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.Date;

import javax.imageio.ImageIO;

import com.sun.image.codec.jpeg.JPEGCodec;
import com.sun.image.codec.jpeg.JPEGEncodeParam;
import com.sun.image.codec.jpeg.JPEGImageEncoder;
import com.synnex.reception.util.PLBarCode39;
import com.synnex.reception.vo.VisitInfoVo;

public class PrintTest {

    public static void main(String[] args) {
        String barCode = "201408210001" ;
        String dateStr = "2014/08/25 23:59:59";
        String name = "Christopher Adam Hernandez Sotelo";
        String visitorCompany = "CHINA Chengdu";
        String employeeName = "Marquisha Ardell Eddington-Williams";
        
        int zoom = 6;
        BufferedImage resultImage = null;
        BufferedImage bufferedImage = new BufferedImage(216*zoom,144*zoom,BufferedImage.TYPE_INT_RGB);
        Graphics g = bufferedImage.getGraphics();
//        g.draw3DRect(0, 0, 216, 144, true);
        g.setColor(Color.WHITE);
        g.fillRect(0, 0, 216*zoom, 144*zoom);
        g.setColor(Color.BLACK);
        
        Image image;
        try {
            image = ImageIO.read(PrintTest.class.getClassLoader().getResource("logo.bmp").openStream());
            if (image != null) {
                g.drawImage(image, 6*zoom, 6*zoom, 60*zoom, 24*zoom, null);
            }
            g.setFont(new Font("Arial", Font.BOLD, 14*zoom));
            g.drawString("VISITOR",100*zoom, 24*zoom);
            
            g.setFont(new Font("Arial", Font.BOLD, 10*zoom));
            g.drawString("Name:",61*zoom, 42*zoom);
            g.drawString("Entry Time:", 37*zoom,63*zoom);
            g.drawString("Company Name:", 12*zoom,80*zoom);
            g.drawString("Employee Name:", 10*zoom,97*zoom);
            
            g.setFont(new Font("Arial", Font.PLAIN, 8*zoom));
            
            g.drawString(name,92*zoom, 42*zoom);
            g.drawString(dateStr, 92*zoom,63*zoom);
            g.drawString(visitorCompany, 92*zoom,80*zoom);
            g.drawString(employeeName, 92*zoom,97*zoom);
            
            g.drawImage(generateBarcodeImage(barCode), 40*zoom, 112*zoom, 152*zoom, 30*zoom, null);
            g.dispose();
            
            resultImage = bufferedImage;//rotate(bufferedImage, 360);
            // encode: com.sun.image.codec.jpeg
            BufferedOutputStream out = new BufferedOutputStream(new FileOutputStream(new File("C:\test.jpg")));
            JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);
            JPEGEncodeParam param = encoder.getDefaultJPEGEncodeParam(resultImage);
            param.setQuality(1.0f, false);
            encoder.setJPEGEncodeParam(param);
            try {
                encoder.encode(resultImage);
            }catch(IOException ioe) {
                ioe.printStackTrace();
            }

        }catch(Exception e){
            e.printStackTrace();
        }
        
        //
//        print(resultImage);
    }
}

上面代码主要是先绘制自己要产生的图片, 然后将图片输出到文件, 手动打开文件即可查看结果. 其中如下代码为导出图片到磁盘:
Java代码：

// encode: com.sun.image.codec.jpeg
BufferedOutputStream out = new BufferedOutputStream(new FileOutputStream(new File("C:\test.jpg")));
JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);
JPEGEncodeParam param = encoder.getDefaultJPEGEncodeParam(resultImage);
param.setQuality(1.0f, false);
encoder.setJPEGEncodeParam(param);
 try {
       encoder.encode(resultImage);
 }catch(IOException ioe) {
       ioe.printStackTrace();
}