java - 用java生成图像

对于我的问题的背景，我正在使用COMSOL（一种有限元软件），您可以在不打开该软件的情况下使用Java来运行它。因此，我试图将其与另一个用Java编写并在Eclipse中运行的软件相结合。我的问题是让COMSOL生成图像文件，例如在我的2D模拟桌面上。导出* .txt文件的代码几乎相同并且可以工作，但是不适用于图像，我想看看是否有人可以帮助我思考在哪里寻找解决方法。

我已经附上了##代码段，我认为这些代码段足以解释我要做什么，而不会导致所有人陷入困境。

import com.comsol.model.*;
import com.comsol.model.util.*;

/** Model exported on Jul 24 2012, 13:33 by COMSOL 4.2.1.110. */
public class COMSOL_Model {

  public static Model run() {
    Model model = ModelUtil.create("Model");

    //code to set up and solve the model
    // and then at the end, you tell COMSOL what to export...


        //this code works...
        model.result("pg1").feature("glob1").set("data", "dset"+i);
    model.result().export("plot1").set("filename",  C:\\Users\\Alex\\Desktop\\temp_data_"+i+".txt");
    model.result().export("plot1").run();


       //this code does NOT work
    model.result("pg2").feature("surf1").set("data", "dset"+i);
    model.result("pg2").set("window", "window"+i);
    model.result("pg2").run();
    model.result().export().create("img"+i, "Image2D");
    model.result("pg2").set("window", "graphics");
    model.result("pg2").set("windowtitle", "");
    model.result().export("img"+i)
         .set("pngfilename", "C:\\Users\\Alex\\Desktop\\surface.png");
    model.result().export("img1").run();

因此，我的第一个问题是，有人可能从理论上或通过代码解释为什么这不起作用吗？我在猜测，因为我需要像“ ImageIO.write”这样的特殊方法。任何提示或想法将不胜感激。

我尝试通过COMSOL解决此问题，它提供了代码来创建一个GUI，该GUI显示模拟的进度，然后在该GUI上打印例如2D / 3D图像。我在一个大的“ for”循环中使用了此功能，在该循环中，java为每次迭代创建了一个GUI和一个新图。问题是，我可以用Java复制框架和进度条以及GUI的所有内容，除了上面打印的图片，我想看看是否有人提出任何建议。我的一个想法是让Java截屏，然后裁剪图像。有什么想法吗？

以下是我认为有必要的带有注释的大多数代码：

import com.comsol.model.*;
import com.comsol.model.util.*;
import com.comsol.modelguiswing.SwingGraphicsPanel;
import java.awt.BorderLayout;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.GraphicsConfiguration;
import java.awt.GraphicsDevice;
import java.awt.GraphicsEnvironment;
import java.awt.Transparency;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import javax.imageio.ImageIO;
import javax.swing.JPanel;
import javax.swing.UIManager;
import javax.swing.*;


public class reuse_solver {

//paste this into configurations
//C:\Program Files\COMSOL\COMSOL42a\lib\win64

private Model model;

public static void main(String[] args) {
    reuse_solver recycler= new reuse_solver();
    recycler.init();
    recycler.looper();
}

public void looper() {
    model = original.run();
    for (int iSimul = 1; iSimul<5; iSimul++){
            start(iSimul);
        }
    }

   //this is the code to have eclipse run comsol
private void init() {
    ModelUtil.initStandalone(true);
}

private void start(int iSimul) {

    if (iSimul==1){
        Progress(iSimul);
        synchronized(model){
            try {
                model.wait();
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            }
    }else{
        Studier(iSimul);
        Progress(iSimul);
        synchronized(model){
            try {
                model.wait();
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            }
        }
}

/this creates the GUI and then runs COMSOL, showing the progress
private void Progress(int i){
    final String sol = "sol"+i;
    final int k = i;
    lookandfeel();
    final JFrame frame = new JFrame("This is an example GUI for Frying");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.setSize(1000, 730);
    final JPanel mainPanel = new JPanel();
    frame.getContentPane().add(mainPanel);
    mainPanel.setLayout(new BorderLayout());
    final SwingGraphicsPanel graphicsPanel = new SwingGraphicsPanel("window"+i, "Window"+i);
    mainPanel.add(graphicsPanel, BorderLayout.CENTER);
    SwingProgressPanel progressPanel =new SwingProgressPanel();
    mainPanel.add(progressPanel, BorderLayout.PAGE_END);
    progressPanel.updateProgressLog("Starting\n"+i+"\n");
    ProgressWorker.setContext(new SwingDemoProgressContext(progressPanel));
    final int pWidth = frame.getWidth();
    final int pHeight = frame.getHeight();
    frame.setVisible(true);

    ProgressWorker.run(new Runnable() {
        public void run() {
            model.sol(sol).feature().create("t1","PlotWhileSolving");
            model.sol(sol).runAll();

            exporter(k, pHeight, pWidth, frame);

        }

    });



}

//code to help COMSOL run in a loop
private void Studier(int i) {
    //COMSOL code goes here
}

private void exporter(int i, int pHeight, int pWidth, JFrame frame) {

            //this code will tell java to put the image in the GUI window once the simulation is done

            model.result("pg2").feature("surf1").set("data", "dset"+i);
    model.result("pg2").set("window", "window"+i);
    model.result("pg2").run();

    // this will generate an image on my desktop, but it will not put the image that was put in the GUI

    BufferedImage bi = new BufferedImage(pWidth,pHeight, BufferedImage.TYPE_INT_RGB);
    Graphics g = bi.createGraphics();
    frame.paint(g);  //this == JComponent
    g.dispose();
    try{ImageIO.write(bi,"png",new File("C:\\Users\\Alex\\Desktop\\surf_"+i+".png"));}catch (Exception e) {}

    synchronized(model){
        model.notify();
    }
}

private void lookandfeel() {
    try {
    UIManager.setLookAndFeel(
    UIManager.getSystemLookAndFeelClassName());
    }
    catch (Exception e) {
    }
    }
}

最佳答案

请参见ComponentImageCapture.java捕获Swing组件的图像。该代码显然存在AWT组件的问题。

在这种情况下，使用Robot捕获图像，但仅捕获组件的区域，而不捕获整个屏幕。

关于java - 用java生成图像，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/11757957/