我有个截取网页图片功能的CLASS,
想对这个CLASS进行每隔10秒钟执行一次,
我用Timer timer = new Timer();这个不好用,
因为我想调用的那个截图CLASS里有个
// 退出操作
System.exit(0);
直接就跳出去了,
可是要是把这个System.exit(0);注释掉的话,只有第一次截图是正确的,以后截图就是错误的图片。
请问如何能对这个CLASS进行定时循环调用呢?
代码如下:package travl.action;
import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;import javax.imageio.ImageIO;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;import chrriis.dj.nativeswing.swtimpl.NativeComponent;
import chrriis.dj.nativeswing.swtimpl.NativeInterface;
import chrriis.dj.nativeswing.swtimpl.components.JWebBrowser;
import chrriis.dj.nativeswing.swtimpl.components.WebBrowserAdapter;
import chrriis.dj.nativeswing.swtimpl.components.WebBrowserEvent;public class PicGetView extends JPanel {
/**
*
*/
private static final long serialVersionUID = 1L; // 行分隔符
final static public String LS = System.getProperty("line.separator", "\n"); // 文件分割符
final static public String FS = System.getProperty("file.separator", "\\"); //以javascript脚本获得网页全屏后大小
final static StringBuffer jsDimension;
static {
jsDimension = new StringBuffer();
jsDimension.append("var width = 0;").append(LS);
jsDimension.append("var height = 0;").append(LS);
jsDimension.append("if(document.documentElement) {").append(LS);
jsDimension.append(
" width = Math.max(width, document.documentElement.scrollWidth);")
.append(LS);
jsDimension.append(
" height = Math.max(height, document.documentElement.scrollHeight);")
.append(LS);
jsDimension.append("}").append(LS);
jsDimension.append("if(self.innerWidth) {").append(LS);
jsDimension.append(" width = Math.max(width, self.innerWidth);")
.append(LS);
jsDimension.append(" height = Math.max(height, self.innerHeight);")
.append(LS);
jsDimension.append("}").append(LS);
jsDimension.append("if(document.body.scrollWidth) {").append(LS);
jsDimension.append(
" width = Math.max(width, document.body.scrollWidth);")
.append(LS);
jsDimension.append(
" height = Math.max(height, document.body.scrollHeight);")
.append(LS);
jsDimension.append("}").append(LS);
jsDimension.append("return width + ':' + height;");
} public PicGetView(final String url, final int maxWidth, final int maxHeight) {
super(new BorderLayout());
JPanel webBrowserPanel = new JPanel(new BorderLayout());
final String fileName = "test.jpg";
final JWebBrowser webBrowser = new JWebBrowser(null);
webBrowser.setBarsVisible(false);
webBrowser.navigate(url);
webBrowserPanel.add(webBrowser, BorderLayout.CENTER);
add(webBrowserPanel, BorderLayout.CENTER); JPanel panel = new JPanel(new FlowLayout(FlowLayout.CENTER, 4, 4)); webBrowser.addWebBrowserListener(new WebBrowserAdapter() { // 监听加载进度
public void loadingProgressChanged(WebBrowserEvent e) {
// 当加载完毕时
if (e.getWebBrowser().getLoadingProgress() == 100) {
String result = (String) webBrowser
.executeJavascriptWithResult(jsDimension.toString());
int index = result == null ? -1 : result.indexOf(":");
NativeComponent nativeComponent = webBrowser
.getNativeComponent();
Dimension originalSize = nativeComponent.getSize();
Dimension imageSize = new Dimension(Integer.parseInt(result
.substring(0, index)), Integer.parseInt(result
.substring(index + 1)));
imageSize.width = Math.max(originalSize.width,
imageSize.width + 50);
imageSize.height = Math.max(originalSize.height,
imageSize.height + 50);
nativeComponent.setSize(imageSize);
BufferedImage image = new BufferedImage(imageSize.width,
imageSize.height, BufferedImage.TYPE_INT_RGB);
nativeComponent.paintComponent(image);
nativeComponent.setSize(originalSize);
// 当网页超出目标大小时
if (imageSize.width > maxWidth
|| imageSize.height > maxHeight) {
//截图部分图形
image = image.getSubimage(0, 0, maxWidth, maxHeight);
/*此部分为使用缩略图
int width = image.getWidth(), height = image
.getHeight();
AffineTransform tx = new AffineTransform();
tx.scale((double) maxWidth / width, (double) maxHeight
/ height);
AffineTransformOp op = new AffineTransformOp(tx,
AffineTransformOp.TYPE_NEAREST_NEIGHBOR);
//缩小
image = op.filter(image, null);*/
}
try {
// 输出图像
ImageIO.write(image, "jpg", new File(fileName));
} catch (IOException ex) {
ex.printStackTrace();
}
// 退出操作
System.exit(0);
}
}
} );
add(panel, BorderLayout.SOUTH); } public static void main(String[] args) {
NativeInterface.open();
SwingUtilities.invokeLater(new Runnable() {
public void run() {
// SWT组件转Swing组件,不初始化父窗体将无法启动webBrowser
JFrame frame = new JFrame("以DJ组件保存指定网页截图");
frame.getContentPane().add(
new PicGetView("http://192.168.1.106:8080/PicViewSave/travl/snjt_gsgl.html", 1024, 768),
BorderLayout.CENTER);
frame.setSize(800, 600);
// 仅初始化,但不显示
frame.invalidate();
frame.pack();
frame.setVisible(false);
}
});
NativeInterface.runEventPump();
}}
想对这个CLASS进行每隔10秒钟执行一次,
我用Timer timer = new Timer();这个不好用,
因为我想调用的那个截图CLASS里有个
// 退出操作
System.exit(0);
直接就跳出去了,
可是要是把这个System.exit(0);注释掉的话,只有第一次截图是正确的,以后截图就是错误的图片。
请问如何能对这个CLASS进行定时循环调用呢?
代码如下:package travl.action;
import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;import javax.imageio.ImageIO;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;import chrriis.dj.nativeswing.swtimpl.NativeComponent;
import chrriis.dj.nativeswing.swtimpl.NativeInterface;
import chrriis.dj.nativeswing.swtimpl.components.JWebBrowser;
import chrriis.dj.nativeswing.swtimpl.components.WebBrowserAdapter;
import chrriis.dj.nativeswing.swtimpl.components.WebBrowserEvent;public class PicGetView extends JPanel {
/**
*
*/
private static final long serialVersionUID = 1L; // 行分隔符
final static public String LS = System.getProperty("line.separator", "\n"); // 文件分割符
final static public String FS = System.getProperty("file.separator", "\\"); //以javascript脚本获得网页全屏后大小
final static StringBuffer jsDimension;
static {
jsDimension = new StringBuffer();
jsDimension.append("var width = 0;").append(LS);
jsDimension.append("var height = 0;").append(LS);
jsDimension.append("if(document.documentElement) {").append(LS);
jsDimension.append(
" width = Math.max(width, document.documentElement.scrollWidth);")
.append(LS);
jsDimension.append(
" height = Math.max(height, document.documentElement.scrollHeight);")
.append(LS);
jsDimension.append("}").append(LS);
jsDimension.append("if(self.innerWidth) {").append(LS);
jsDimension.append(" width = Math.max(width, self.innerWidth);")
.append(LS);
jsDimension.append(" height = Math.max(height, self.innerHeight);")
.append(LS);
jsDimension.append("}").append(LS);
jsDimension.append("if(document.body.scrollWidth) {").append(LS);
jsDimension.append(
" width = Math.max(width, document.body.scrollWidth);")
.append(LS);
jsDimension.append(
" height = Math.max(height, document.body.scrollHeight);")
.append(LS);
jsDimension.append("}").append(LS);
jsDimension.append("return width + ':' + height;");
} public PicGetView(final String url, final int maxWidth, final int maxHeight) {
super(new BorderLayout());
JPanel webBrowserPanel = new JPanel(new BorderLayout());
final String fileName = "test.jpg";
final JWebBrowser webBrowser = new JWebBrowser(null);
webBrowser.setBarsVisible(false);
webBrowser.navigate(url);
webBrowserPanel.add(webBrowser, BorderLayout.CENTER);
add(webBrowserPanel, BorderLayout.CENTER); JPanel panel = new JPanel(new FlowLayout(FlowLayout.CENTER, 4, 4)); webBrowser.addWebBrowserListener(new WebBrowserAdapter() { // 监听加载进度
public void loadingProgressChanged(WebBrowserEvent e) {
// 当加载完毕时
if (e.getWebBrowser().getLoadingProgress() == 100) {
String result = (String) webBrowser
.executeJavascriptWithResult(jsDimension.toString());
int index = result == null ? -1 : result.indexOf(":");
NativeComponent nativeComponent = webBrowser
.getNativeComponent();
Dimension originalSize = nativeComponent.getSize();
Dimension imageSize = new Dimension(Integer.parseInt(result
.substring(0, index)), Integer.parseInt(result
.substring(index + 1)));
imageSize.width = Math.max(originalSize.width,
imageSize.width + 50);
imageSize.height = Math.max(originalSize.height,
imageSize.height + 50);
nativeComponent.setSize(imageSize);
BufferedImage image = new BufferedImage(imageSize.width,
imageSize.height, BufferedImage.TYPE_INT_RGB);
nativeComponent.paintComponent(image);
nativeComponent.setSize(originalSize);
// 当网页超出目标大小时
if (imageSize.width > maxWidth
|| imageSize.height > maxHeight) {
//截图部分图形
image = image.getSubimage(0, 0, maxWidth, maxHeight);
/*此部分为使用缩略图
int width = image.getWidth(), height = image
.getHeight();
AffineTransform tx = new AffineTransform();
tx.scale((double) maxWidth / width, (double) maxHeight
/ height);
AffineTransformOp op = new AffineTransformOp(tx,
AffineTransformOp.TYPE_NEAREST_NEIGHBOR);
//缩小
image = op.filter(image, null);*/
}
try {
// 输出图像
ImageIO.write(image, "jpg", new File(fileName));
} catch (IOException ex) {
ex.printStackTrace();
}
// 退出操作
System.exit(0);
}
}
} );
add(panel, BorderLayout.SOUTH); } public static void main(String[] args) {
NativeInterface.open();
SwingUtilities.invokeLater(new Runnable() {
public void run() {
// SWT组件转Swing组件,不初始化父窗体将无法启动webBrowser
JFrame frame = new JFrame("以DJ组件保存指定网页截图");
frame.getContentPane().add(
new PicGetView("http://192.168.1.106:8080/PicViewSave/travl/snjt_gsgl.html", 1024, 768),
BorderLayout.CENTER);
frame.setSize(800, 600);
// 仅初始化,但不显示
frame.invalidate();
frame.pack();
frame.setVisible(false);
}
});
NativeInterface.runEventPump();
}}
你从这两个方面看下你的代码有什么问题没有。
System.exit(0);
这个应该怎么改呢?
这个一执行,所有的程序都退出了!
有什么方法可以只释放当前的程序资源呢?
请指教
在线等
我没用过,给点思路也行,
我把System.exit(0)注释掉后
就在NativeInterface.runEventPump();这里报错
我在这后面加上NativeInterface.close();也是在上句那里报错
都雪藏哪里去啦?
呼叫大侠帮忙啊!
因为NativeInterface.open();和NativeInterface.runEventPump();是静态方法,猜想只有在程序的开始和结束调用这两个方法,不应该在循环里调用这两个方法
所以试试看
public static void main(String[] args) {
NativeInterface.open();
for (int cnt=0; cnt<10; cnt++) { //循环放在这里
SwingUtilities.invokeLater(new Runnable() {
public void run() {
// SWT组件转Swing组件,不初始化父窗体将无法启动webBrowser
JFrame frame = new JFrame("以DJ组件保存指定网页截图");
frame.getContentPane().add(
new PicGetView("http://192.168.1.106:8080/PicViewSave/travl/snjt_gsgl.html", 1024, 768),
BorderLayout.CENTER);
frame.setSize(800, 600);
// 仅初始化,但不显示
frame.invalidate();
frame.pack();
frame.setVisible(false);
}
});
} //循环结束
NativeInterface.runEventPump();
}至于输出到指定路径,可以修改这里
final String fileName = "test.jpg";
// 输出图像
ImageIO.write(image, "jpg", new File(fileName));