java创建图片代码 java生成图片

如何用java添加图片

import javax.swing.ImageIcon;

import javax.swing.JFrame;

import javax.swing.JLabel;

import javax.swing.JPanel;

public class Test extends JFrame{

private ImageIcon i;

private JLabel l;

private JPanel p;

public Test(){

i = new ImageIcon("D:\\1.jpg");

l = new JLabel(i);

p = new JPanel();

p.add(l);

this.add(p);

this.setBounds(300, 200, 200, 300);

this.setVisible(true);

this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

}

public static void main(String[] args){

new Test();

}

}

这样写吧，简单明了。路径是可变的，我这个例子是D盘下有个 1.jpg 的图片

你要改路径的时候 记得是\\ 写\ 没用的。

愿你的JAVA 之路更有趣，有问题随时欢迎讨论！

相关问答

Q1: 解析下这个生成图片的Java代码

1.调用"images"文件夹里的文件放在ImageIcon里显示2.在windows下面显示正常Java在图形处理时调用了本地的图形处理库。在利用Java作图形处理（比如：图片缩放，图片签名，生成报表）时，如果运行在windows上不会出问题。如果将程序移植到Linux/Unix上的时候有可能出现图形不能显示的错误。3.提示信息："Can'tconnecttoX11windowserver"这是由于Linux的图形处理需要一个XServer服务器。（关于Linux的图形处理模式参考Tomcat的修改如下：打开%Tomcat_home%/bin/catalina.sh文件在文件的86%处，启动Tomcat的脚本中加上:-Djava.awt.headless=true/参考："$_RUNJAVA"$JAVA_OPTS$CATALINA_OPTS/-Djava.endorsed.dirs="$JAVA_ENDORSED_DIRS"-classpath"$CLASSPATH"/-Dcatalina.base="$CATALINA_BASE"/-Dcatalina.home="$CATALINA_HOME"/-Djava.io.tmpdir="$CATALINA_TMPDIR"/-Djava.awt.headless=true/org.apache.catalina.startup.Bootstrap"$@"start/"$CATALINA_BASE"/logs/catalina.out21if[!-z"$CATALINA_PID"];thenecho$!$CATALINA_PIDfifielif["$1"="stop"];then保存后，重新启动就可以处理图形了。

Q2: 高分求java代码，用来生成图片文件！！

//defaultSuffix是jpg

public static final boolean resizeImage(String fileName, String suffix) throws Exception {

boolean uploaded = false;

BufferedImage input;

if(suffix.equalsIgnoreCase("tif")||suffix.equalsIgnoreCase("tiff")||suffix.equalsIgnoreCase("png")) {

RenderedImage image = JAI.create("fileload", TurbineServlet.getRealPath(imageRoot + fileName+"."+suffix));

WritableRaster raster = image.copyData(null);

BufferedImage bi = new BufferedImage( image.getColorModel(), raster, true, null);

BufferedImage bi2 = new BufferedImage( maxResizeDimension, bi.getHeight()*maxResizeDimension/bi.getWidth(), BufferedImage.TYPE_INT_RGB);

Graphics2D g2 = bi2.createGraphics();

g2.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BILINEAR);

g2.setBackground(java.awt.Color.WHITE);//把tiff和png转换后的背景设置为白色

g2.fillRect(0, 0, maxResizeDimension, bi.getHeight()*maxResizeDimension/bi.getWidth());

g2.drawImage(bi, 0, 0, maxResizeDimension, bi.getHeight()*maxResizeDimension/bi.getWidth(), null);

PlanarImage pi = PlanarImage.wrapRenderedImage(bi2);

JAI.create("FileStore", pi, TurbineServlet.getRealPath(resizeRoot + fileName+"."+defaultSuffix).replaceAll("\\\\","\\\\\\\\"), "JPEG", new JPEGEncodeParam());

input = pi.getAsBufferedImage();

int w = maxThumbDimension, h = maxThumbDimension;

BufferedImage output = new BufferedImage(w, h, BufferedImage.TYPE_3BYTE_BGR);

Graphics2D g = output.createGraphics();

g.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BILINEAR);

g.drawImage(input,0,0,w,h, null);

ImageIO.write(output, defaultSuffix, new File(TurbineServlet.getRealPath(thumbRoot + fileName+"."+defaultSuffix)));

}

else {

input = ImageIO.read(new File(TurbineServlet.getRealPath(imageRoot + fileName+"."+suffix)));

int w = maxThumbDimension, h = maxThumbDimension;

BufferedImage output = new BufferedImage(w, h, BufferedImage.TYPE_3BYTE_BGR);

Graphics2D g = output.createGraphics();

g.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BILINEAR);

g.drawImage(input,0,0,w,h, null);

ImageIO.write(output, defaultSuffix, new File(TurbineServlet.getRealPath(thumbRoot + fileName+"."+defaultSuffix)));

BufferedImage output2 = new BufferedImage(maxResizeDimension, input.getHeight()*maxResizeDimension/input.getWidth(), BufferedImage.TYPE_3BYTE_BGR);

Graphics2D g2 = output2.createGraphics();

g2.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BILINEAR);

g2.drawImage(input,0,0,maxResizeDimension, input.getHeight()*maxResizeDimension/input.getWidth(), null);

ImageIO.write(output2, defaultSuffix, new File(TurbineServlet.getRealPath(resizeRoot + fileName+"."+defaultSuffix)));

}

uploaded = true;

return uploaded;

}

Q3: 跪求图片生成器java全代码，要求可以画图和获取屏幕并且能保存。拜托各位大神了

正好写了一个，给你看看哈

import java.awt.*;

import java.awt.image.BufferedImage;

import java.io.File;

import java.util.Date;

import javax.imageio.ImageIO;

public class ScreenCapturer {

public static void main(String[] args) throws Exception{

Date date = new Date();

Robot rbt = new Robot();

BufferedImage bf =  rbt.createScreenCapture(new Rectangle(1440,900));  //这是屏幕分辨率  可以根据自己的屏幕修改

File file = new File("d://"+ date.toString().replace(" ","").replace(":","")+".jpg");  //这是保存路径D盘根目录

ImageIO.write(bf,"jpg",file);

System.out.println("截图成功！保存于D盘根目录下！时间：" + date.toString());

}

}

Q4: 怎么为Java程序添加背景图片代码？

仅仅是给窗口添加背景的话是很简单的，添加上以下语句（自己去添加变量哈）：

label = new JLabel(background); //background为ImageIcon

// 把标签的大小位置设置为图片刚好填充整个面板

label.setBounds(0, 0, this.getWidth(), this.getHeight());

//添加图片到frame的第二层(把背景图片添加到分层窗格的最底层作为背景)

this.getLayeredPane().add(label,new Integer(Integer.MIN_VALUE));

//把内容窗格转化为JPanel，否则不能用方法setOpaque()来使内容窗格透明

jPanel=(JPanel)this.getContentPane();

//设置透明

jPanel.setOpaque(false);

然后你上面那个JPanel p也设置成透明就可以了