java 调用graphviz_java程序如何调用Graphviz

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网上有别人已经写好的一个GraphViz.java类。java可以直接调用e68a8462616964757a686964616f31333332613062这个类实现画图功能，但是使用这个类的前提是你的电脑已经装了GraphViz软件，你可以在http://www.graphviz.org/Gallery.php下载windows版本，装完后，找到dot.exe所在的路径，我电脑上的是D:\Program Files\Graphviz2.30\bin\dot.exe,

将GraphViz.java中的这一路径改成你电脑上的路径，基本上就可以用了。

package Graphoutput;

// GraphViz.java - a simple API to call dot from Java programs

/*$Id$*/

/*

******************************************************************************

* *

* (c) Copyright 2003 Laszlo Szathmary *

* *

* This program is free software; you can redistribute it and/or modify it *

* under the terms of the GNU Lesser General Public License as published by *

* the Free Software Foundation; either version 2.1 of the License, or *

* (at your option) any later version. *

* *

* This program is distributed in the hope that it will be useful, but *

* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY *

* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public *

* License for more details. *

* *

* You should have received a copy of the GNU Lesser General Public License *

* along with this program; if not, write to the Free Software Foundation, *

* Inc., 675 Mass Ave, Cambridge, MA 02139, USA. *

* *

******************************************************************************

*/

import java.io.BufferedReader;

import java.io.DataInputStream;

import java.io.File;

import java.io.FileInputStream;

import java.io.FileOutputStream;

import java.io.FileWriter;

import java.io.InputStreamReader;

/**

*

*

Purpose: GraphViz Java API

*

*

*

Description:

*

With this Java class you can simply call dot

* from your Java programs

*

Example usage:

*

*

* GraphViz gv = new GraphViz();

* gv.addln(gv.start_graph());

* gv.addln("A -> B;");

* gv.addln("A -> C;");

* gv.addln(gv.end_graph());

* System.out.println(gv.getDotSource());

*

* String type = "gif";

* File out = new File("out." + type); // out.gif in this example

* gv.writeGraphToFile( gv.getGraph( gv.getDotSource(), type ), out );

*

*

*

*

*

* @version v0.4, 2011/02/05 (February)