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")); 

2、获取Tomcat的版本
jsp中使用

<%= application.getServerInfo() %>