java获取jdk、系统、服务器等信息

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")); 

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"));