这便是我们今天的主角， 也就是最后的效果图

简要的步骤如下：

• 打开http://www.graphviz.org/下载所在平台的Graphviz
• 如果是windows及编译的等，可能需要加入系统路径
• 确保其能运行dot命令

关于Graphviz: Graphviz （英文：Graph Visualization Software的缩写）是一个由AT&T实验室启动的开源工具包，用于绘制DOT语言脚本描述的图形。它也提供了供其它软件使用的库。Graphviz是一个自由软件，其授权为Eclipse Public License。其Mac版本曾经获得2004年的苹果设计奖。

graph example1 {
    Server1 -- Server2
    Server2 -- Server3
    Server3 -- Server1
}

结果如图所示：

如何生成？

dot example1.dot –Tpng –o example1.png

根据生成的不同格式选择不同的输出方式

dot example1.dot –Tbmp –o example1.bmp

最后让我们看一下开头那个：

    digraph g {
    graph [
    rankdir = "LR"
    ];
    node [
    fontsize = "16"
    shape = "ellipse"
    ];
    edge [
    ];
    "node0" [
    label = " 0x10ba8| "
    shape = "record"
    ];
    "node1" [
    label = " 0xf7fc4380|  |  |-1"
    shape = "record"
    ];
    "node2" [
    label = " 0xf7fc44b8| | |2"
    shape = "record"
    ];
    "node3" [
    label = " 3.43322790286038071e-06|44.79998779296875|0"
    shape = "record"
    ];
    "node4" [
    label = " 0xf7fc4380|  |  |2"
    shape = "record"
    ];
    "node5" [
    label = " (nil)| | |-1"
    shape = "record"
    ];
    "node6" [
    label = " 0xf7fc4380|  |  |1"
    shape = "record"
    ];
    "node7" [
    label = " 0xf7fc4380|  |  |2"
    shape = "record"
    ];
    "node8" [
    label = " (nil)| | |-1"
    shape = "record"
    ];
    "node9" [
    label = " (nil)| | |-1"
    shape = "record"
    ];
    "node10" [
    label = " (nil)|  |  |-1"
    shape = "record"
    ];
    "node11" [
    label = " (nil)|  |  |-1"
    shape = "record"
    ];
    "node12" [
    label = " 0xf7fc43e0| | |1"
    shape = "record"
    ];
    "node0":f0 -> "node1":f0 [
    id = 0
    ];
    "node0":f1 -> "node2":f0 [
    id = 1
    ];
    "node1":f0 -> "node3":f0 [
    id = 2
    ];
    "node1":f1 -> "node4":f0 [
    id = 3
    ];
    "node1":f2 -> "node5":f0 [
    id = 4
    ];
    "node4":f0 -> "node3":f0 [
    id = 5
    ];
    "node4":f1 -> "node6":f0 [
    id = 6
    ];
    "node4":f2 -> "node10":f0 [
    id = 7
    ];
    "node6":f0 -> "node3":f0 [
    id = 8
    ];
    "node6":f1 -> "node7":f0 [
    id = 9
    ];
    "node6":f2 -> "node9":f0 [
    id = 10
    ];
    "node7":f0 -> "node3":f0 [
    id = 11
    ];
    "node7":f1 -> "node1":f0 [
    id = 12
    ];
    "node7":f2 -> "node8":f0 [
    id = 13
    ];
    "node10":f1 -> "node11":f0 [
    id = 14
    ];
    "node10":f2 -> "node12":f0 [
    id = 15
    ];
    "node11":f2 -> "node1":f0 [
    id = 16
    ];
    }