tomcat本地地址 E:soft4developapache-tomcat-6.0.18

System.getProperty("user.dir")//E:soft4developapache-tomcat-6.0.18bin

System.getProperty("catalina.home")//E:soft4developapache-tomcat-6.0.18对于jboss同样适用。其他容器未做测试。

说道这里,正好有朋友在群里头问了个问题,情景式这样的

登陆需要用Https来做请求,登陆成功后,剩下的其他请求全部走http.

比如https://www.jb51.net/admin/user_manager.apsx

发现这个不需要走Https,就转发到

http://www.jb51.net/admin/user_manager.apsx

问题来了

request.getServerPort() 只能获取https时的port1端口

那如何获取port2端口呢。

通过上面的方式可以获取到tomact的路径,在通过下面xml的xpath来获取到

tomcat的server.xml中的端口配置拼接,来实现。

获取tomcat端口的方法

复制代码 代码如下:

public static Integer getTomcatPortFromConfigXml(File serverXml) {

Integer port;

try {

DocumentBuilderFactory domFactory = DocumentBuilderFactory.newInstance();

domFactory.setNamespaceAware(true); // never forget this!

DocumentBuilder builder = domFactory.newDocumentBuilder();

Document doc = builder.parse(serverXml);

XPathFactory factory = XPathFactory.newInstance();

XPath xpath = factory.newXPath();

XPathExpression expr = xpath.compile

("/Server/Service[@name='Catalina']/Connector[count(@scheme)=0]/@port[1]");

String result = (String) expr.evaluate(doc, XPathConstants.STRING);

port = result != null && result.length() > 0 ? Integer.valueOf(result) : null;

} catch (Exception e) {

port = null;

}

return port;

}

最后附带下System.ge

复制代码 代码如下:

另外：System.getProperty()中的字符串参数如下：

System.getProperty()参数大全

# java.version Java Runtime Environment version

# java.vendor Java Runtime Environment vendor

# java.vendor.url Java vendor URL

# java.home Java installation directory

# java.vm.specification.version Java Virtual Machine specification version

# java.vm.specification.vendor Java Virtual Machine specification vendor

# java.vm.specification.name Java Virtual Machine specification name

# java.vm.version Java Virtual Machine implementation version

# java.vm.vendor Java Virtual Machine implementation vendor

# java.vm.name Java Virtual Machine implementation name

# java.specification.version Java Runtime Environment specification version

# java.specification.vendor Java Runtime Environment specification vendor

# java.specification.name Java Runtime Environment specification name

# java.class.version Java class format version number

# java.class.path Java class path

# java.library.path List of paths to search when loading libraries

# java.io.tmpdir Default temp file path

# java.compiler Name of JIT compiler to use

# java.ext.dirs Path of extension directory or directories

# os.name Operating system name

# os.arch Operating system architecture

# os.version Operating system version

# file.separator File separator ("/" on UNIX)

# path.separator Path separator (":" on UNIX)

# line.separator Line separator ("n" on UNIX)

# user.name User's account name

# user.home User's home directory

# user.dir User's current working directory

File.getCanonicalPath()和File.getAbsolutePath()大约只是对于new File(".")和new File("..")两种路径有所区别。

复制代码 代码如下:

# 对于getCanonicalPath()函数，“."就表示当前的文件夹，而”..“则表示当前文件夹的上一级文件夹

# 对于getAbsolutePath()函数，则不管”.”、“..”，返回当前的路径加上你在new File()时设定的路径

# 至于getPath()函数，得到的只是你在new File()时设定的路径

比如当前的路径为 C:test ：

File directory = new File("abc");

directory.getCanonicalPath(); //得到的是C:testabc

directory.getAbsolutePath(); //得到的是C:testabc

direcotry.getPath(); //得到的是abc

File directory = new File(".");

directory.getCanonicalPath(); //得到的是C:test

directory.getAbsolutePath(); //得到的是C:test.

direcotry.getPath(); //得到的是.

File directory = new File("..");

directory.getCanonicalPath(); //得到的是C:

directory.getAbsolutePath(); //得到的是C:test..

direcotry.getPath(); //得到的是..