java获取jdk、系统、服务器等信息

1、获取jdk信息

System.out.println(System.getProperty("java.version"));     
        System.out.println(System.getProperty("java.vendor"));     
        System.out.println(System.getProperty("java.vendor.url"));     
        System.out.println(System.getProperty("java.home"));     
        System.out.println(System.getProperty("java.vm.specification.version"));     
        System.out.println(System.getProperty("java.vm.specification.vendor"));     
        System.out.println(System.getProperty("java.vm.specification.name"));     
        System.out.println(System.getProperty("java.vm.version"));     
        System.out.println(System.getProperty("java.vm.vendor"));     
        System.out.println(System.getProperty("java.vm.name"));     
        System.out.println(System.getProperty("java.specification.version"));     
        System.out.println(System.getProperty("java.specification.vendor"));     
        System.out.println(System.getProperty("java.specification.name"));     
        System.out.println(System.getProperty("java.class.version"));     
        System.out.println(System.getProperty("java.class.path"));     
        System.out.println(System.getProperty("java.library.path"));     
        System.out.println(System.getProperty("java.io.tmpdir"));     
        System.out.println(System.getProperty("java.compiler"));     
        System.out.println(System.getProperty("java.ext.dirs"));

2、获取系统信息

System.out.println(System.getProperty("os.name"));     
        System.out.println(System.getProperty("os.arch"));     
        System.out.println(System.getProperty("os.version"));     
        System.out.println(System.getProperty("file.separator"));     
        System.out.println(System.getProperty("path.separator"));     
        System.out.println(System.getProperty("line.separator"));     
        System.out.println(System.getProperty("user.name"));     
        System.out.println(System.getProperty("user.home"));                     
        System.out.println(System.getProperty("user.dir"));

3.获取Tomcat的版本 

<%= application.getServerInfo() %>

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几个常用Request.ServerVariables的中文  

本文件ip路径：<%="http://" & request.servervariables("server_name")&request.servervariables("script_name") %>  
本机ip:<%=request.servervariables("remote_addr")%>  
服务器名:<%=Request.ServerVariables("SERVER_NAME")%>  
服务器IP:<%=Request.ServerVariables("LOCAL_ADDR")%>  
服务器端口:<%=Request.ServerVariables("SERVER_PORT")%>  
服务器时间:<%=now%>  
IIS版本:<%=Request.ServerVariables("SERVER_SOFTWARE")%>  
脚本超时时间:<%=Server.ScriptTimeout%>  
本文件路径:<%=server.mappath(Request.ServerVariables("SCRIPT_NAME"))%>  
服务器CPU数量:<%=Request.ServerVariables("NUMBER_OF_PROCESSORS")%>  
服务器解译引擎:<%=ScriptEngine & "/"& ScriptEngineMajorVersion&"."&ScriptEngineMinorVersion&"."& ScriptEngineBuildVersion %>  
服务器操作系统:<%=Request.ServerVariables("OS")%>  
支持的文件类型：<%=Request.ServerVariables("HTTP_Accept")%>  
访问的文件路径：<%=Request.ServerVariables("HTTP_url")%>  
用户代理的信息：<%=Request.ServerVariables("HTTP_USER_AGENT")%>  
获取url中的文件名和传过来的值:request.ServerVariables("script_name")+"?"+request.ServerVariableS("QUERY_STRING