java：取得程序的“根目录”的位置

  1，当被封装在一个jar里的时候，在jar的MANIFEST.MF文件的Class-Path里，加入点（.）。然后用下面的代码

URL url = Program.class.getResource("/");

if (url != null) {

baseDir = new File(Program.class.getResource("/").toURI());

} else {

System.out.println("Cant not find base dir out.give up.");

return;

}

2，部署于tomcat中的web app，则直接可以调用系统属性“webapp.root”。比如，我的tomcat启动的时候有如下的信息：

2008/07/31 9:44:29 org.apache.catalina.core.ApplicationContext log
情報: Set web app root system property: 'webapp.root' = [C:/Documents and Settings/Administrator/M...../]

.csharpcode, .csharpcode pre
{
font-size: small;
color: black;
font-family: consolas, "Courier New", courier, monospace;
background-color: #ffffff;
/*white-space: pre;*/
}
.csharpcode pre { margin: 0em; }
.csharpcode .rem { color: #008000; }
.csharpcode .kwrd { color: #0000ff; }
.csharpcode .str { color: #006080; }
.csharpcode .op { color: #0000c0; }
.csharpcode .preproc { color: #cc6633; }
.csharpcode .asp { background-color: #ffff00; }
.csharpcode .html { color: #800000; }
.csharpcode .attr { color: #ff0000; }
.csharpcode .alt
{
background-color: #f4f4f4;
width: 100%;
margin: 0em;
}
.csharpcode .lnum { color: #606060; }

.csharpcode, .csharpcode pre
{
font-size: small;
color: black;
font-family: consolas, "Courier New", courier, monospace;
background-color: #ffffff;
/*white-space: pre;*/
}
.csharpcode pre { margin: 0em; }
.csharpcode .rem { color: #008000; }
.csharpcode .kwrd { color: #0000ff; }
.csharpcode .str { color: #006080; }
.csharpcode .op { color: #0000c0; }
.csharpcode .preproc { color: #cc6633; }
.csharpcode .asp { background-color: #ffff00; }
.csharpcode .html { color: #800000; }
.csharpcode .attr { color: #ff0000; }
.csharpcode .alt
{
background-color: #f4f4f4;
width: 100%;
margin: 0em;
}
.csharpcode .lnum { color: #606060; }