急急急如何让Jgraph生成的流程图显示到web页面上

不是太了解Jgraph,你查查api有没有可以输出为io流的东西？
servlet做io流输出,jsp里面用<image src="servlet"/>就行。

我用过两种方案，一是applet，一是生成静态图片。jbpm有生成静态图片的例子，可以参考

请指教，我对Applet不了解请问哪里写错了，我怎么显示不出来啊在页面
public class HelloWorld extends Applet{
public static void main(String[] args) {
GraphModel model = new DefaultGraphModel();
GraphLayoutCache view = new GraphLayoutCache(model,
new
DefaultCellViewFactory());
JGraph graph = new JGraph(model, view);
DefaultGraphCell[] cells = new DefaultGraphCell[3];
cells[0] = new DefaultGraphCell(new String("Hello")); GraphConstants.setBounds(cells[0].getAttributes(), new
Rectangle2D.Double(20,20,40,20));
GraphConstants.setGradientColor(
cells[0].getAttributes(),
Color.orange);
GraphConstants.setOpaque(cells[0].getAttributes(), true);
DefaultPort port0 = new DefaultPort();
cells[0].add(port0);
cells[1] = new DefaultGraphCell(new String("World")); GraphConstants.setBounds(cells[1].getAttributes(), new
Rectangle2D.Double(140,140,40,20));
GraphConstants.setGradientColor(
cells[1].getAttributes(),
Color.red);
GraphConstants.setOpaque(cells[1].getAttributes(), true);
DefaultPort port1 = new DefaultPort();
cells[1].add(port1);
DefaultEdge edge = new DefaultEdge();
edge.setSource(cells[0].getChildAt(0));
edge.setTarget(cells[1].getChildAt(0));
cells[2] = edge;
int arrow = GraphConstants.ARROW_CLASSIC; GraphConstants.setLineEnd(edge.getAttributes(), arrow);
GraphConstants.setEndFill(edge.getAttributes(), true);
graph.getGraphLayoutCache().insert(cells);
JFrame frame = new JFrame();
frame.getContentPane().add(new JScrollPane(graph));
frame.pack();
frame.setVisible(true);
}
}jsp页面
<HTML><TITLE>HelloWorld! Applet</TITLE><APPLETcodebase="."CODE="hello.HelloWorld.class"name="HelloWorld" WIDTH=200HEIGHT=100ALIGN = middle> </APPLET></HTML>

applet不需要main方法，需要init等方法，自己找个applet的例子吧

做成静态图片，通过action或者servlet输出到页面就可以了

已经可以页面上显示了，用的静态图片方式，不能拖拽，代码在下方。                                 我想做成一个可以拖拽布局的，就和它原来桌面程序一样，不知道使用applet能否实现此功能。BufferedImage img = graph.getImage(graph.getBackground(), 1);
OutputStream  os = response.getOutputStream();
if (img != null) {
    try {
ImageIO.write(img, "JPEG", os);
os.flush();

} catch (Exception e) {
e.printStackTrace();
} finally {
os.close();
}
}

按说进将桌面程序里的jgraph图像代码搬到applet中去就可以了，记得指定jgraph的jar包

public class HelloWorld extends Applet { public void init() {
GraphModel model = new DefaultGraphModel();
GraphLayoutCache view = new GraphLayoutCache(model,
new DefaultCellViewFactory());
JGraph graph = new JGraph(model, view);
DefaultGraphCell[] cells = new DefaultGraphCell[3];
cells[0] = new DefaultGraphCell(new String("Hello"));
GraphConstants.setBounds(cells[0].getAttributes(),
new Rectangle2D.Double(20, 20, 40, 20));
GraphConstants.setGradientColor(cells[0].getAttributes(), Color.orange);
GraphConstants.setOpaque(cells[0].getAttributes(), true);
DefaultPort port0 = new DefaultPort();
cells[0].add(port0);
cells[1] = new DefaultGraphCell(new String("World"));
GraphConstants.setBounds(cells[1].getAttributes(),
new Rectangle2D.Double(140, 140, 40, 20));
GraphConstants.setGradientColor(cells[1].getAttributes(), Color.red);
GraphConstants.setOpaque(cells[1].getAttributes(), true);
DefaultPort port1 = new DefaultPort();
cells[1].add(port1);
DefaultEdge edge = new DefaultEdge();
edge.setSource(cells[0].getChildAt(0));
edge.setTarget(cells[1].getChildAt(0));
cells[2] = edge;
int arrow = GraphConstants.ARROW_CLASSIC;
GraphConstants.setLineEnd(edge.getAttributes(), arrow);
GraphConstants.setEndFill(edge.getAttributes(), true); graph.getGraphLayoutCache().insert(cells);
JFrame frame = new JFrame();
frame.getContentPane().add(new JScrollPane(graph));
frame.pack();
frame.setVisible(true);
}

}
页面：<html>
  <head>
  </head>
  <body>
    <applet codebase="."
            archive="jgraph.jar"
            code="hello.HelloWorld.class"
            name="HelloWorld"
            width="320"
            height="240">
    </applet>
  </body>
</html>
访问页面时，流程图还是在跳出的窗口中显示，请各位高手帮助一下。怎么嵌入到页面中，而且在页面中也能拖拽啊？

public class HelloWorld extends Applet {
public HelloWorld(){
GraphModel model = new DefaultGraphModel();
GraphLayoutCache view = new GraphLayoutCache(model,
new DefaultCellViewFactory());
JGraph graph = new JGraph(model, view);
DefaultGraphCell[] cells = new DefaultGraphCell[3];
cells[0] = new DefaultGraphCell(new String("Hello"));
GraphConstants.setBounds(cells[0].getAttributes(),
new Rectangle2D.Double(20, 20, 40, 20));
GraphConstants.setGradientColor(cells[0].getAttributes(), Color.orange);
GraphConstants.setOpaque(cells[0].getAttributes(), true);
DefaultPort port0 = new DefaultPort();
cells[0].add(port0);
cells[1] = new DefaultGraphCell(new String("World"));
GraphConstants.setBounds(cells[1].getAttributes(),
new Rectangle2D.Double(140, 140, 40, 20));
GraphConstants.setGradientColor(cells[1].getAttributes(), Color.red);
GraphConstants.setOpaque(cells[1].getAttributes(), true);
DefaultPort port1 = new DefaultPort();
cells[1].add(port1);
DefaultEdge edge = new DefaultEdge();
edge.setSource(cells[0].getChildAt(0));
edge.setTarget(cells[1].getChildAt(0));
cells[2] = edge;
int arrow = GraphConstants.ARROW_CLASSIC;
GraphConstants.setLineEnd(edge.getAttributes(), arrow);
GraphConstants.setEndFill(edge.getAttributes(), true); graph.getGraphLayoutCache().insert(cells);
Panel panel = new Panel();
panel.setSize(800000000, 60000000);
panel.add(new JScrollPane(graph));
this.add(panel);
}用此方法已解决

怎么解决的啊，我也在学这个，。jgraph画拓扑图在页面显示，页面用applet做，像客户端，有数据库连接，可以拖拽改变拓扑图保存到数据库。有谁做个这样的例子啊。

flowGraph,很简单的生成流程图，可以看看
https://sourceforge.net/p/flowgraph

调试易

急急急如何让Jgraph生成的流程图显示到web页面上

解决方案 »

急急急 如何让Jgraph生成的流程图显示到web页面上

解决方案 »

急急急如何让Jgraph生成的流程图显示到web页面上