java调用Linux环境下jni的问题

0 0

java调用Linux环境下jni的问题5

我在tomcat启动时就执行这个native　方法，可是执行的结果却不对。
我改成main()　用 java com.xxx.xx.Abc　这样就可以执行，这是为什么啊？？？？

有没有高手回答一下呀

public class License
{
    /**
     * 注释内容
     */
    private static final long serialVersionUID = 1L;
    
    /**
     * 日志对象
     */
    
    static
    {
        int i = 0;
        try
        {
            System.out.println("loadLibary start...");
            System.loadLibrary("License");
            i = 1;
            System.out.println("load Libary OK...");
        }
        catch (Exception e)
        {
            i = 2;
            // TODO Auto-generated catch block
            System.out.println("load error");
            e.printStackTrace();
            
            Runtime runtime = Runtime.getRuntime();
            try
            {
                i = 3;
                System.out.println("load libLicense.so error, killall java");
                runtime.exec("killall java");
            }
            catch (Exception e1)
            {
                i = 4;
                // TODO Auto-generated catch block
                e1.printStackTrace();
            }
        }
        finally
        {
            System.out.println("i = " + i);
            if (i == 0)
            {
                Runtime runtime = Runtime.getRuntime();
                try
                {
                    System.out.println("load libLicense.so error, killall java");
                    runtime.exec("killall java");
                }
                catch (Exception e1)
                {
                    // TODO Auto-generated catch block
                    e1.printStackTrace();
                }
            }
        }
    }
    
    private native boolean verifylicense();
    
    /**
     * <校验license>
     * <功能详细描述>
     * @param args
     * @see [类、类#方法、类#成员]
     */
    public static void main(String[] args)
    {
        System.out.println("into init() method..");
        License l =new License();
        Object o = l.verifylicense();
        System.out.println("return value is: " + o.toString());
        if (l.verifylicense())
        {
            System.out.println("verifylicense ERROR");
            
            Runtime runtime = Runtime.getRuntime();
            try
            {
                System.out.println("verifylicense failed, killall java");
                runtime.exec("killall java");
            }
            catch (Exception e1)
            {
                // TODO Auto-generated catch block
                e1.printStackTrace();
            }
        }
        else
        {
            System.out.println("verifylicense OK");
        }
        System.out.println("after verifylicense~~~~");
    }
}

换成随着tomcat启动时执行，verifylicense()却始终返回true，貌似没有执行

问题补充：改成如下的方式：随着tomcat启动时执行，native方法执行不了，这是为什么啊？

<servlet>
<servlet-name>smcInitServlet</servlet-name>
<servlet-class>com.xxx.common.util.License</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>

public class License extends HttpServlet
{
private native boolean verifylicense();
static{
      System.loadLibrary("License");
}

public void init(ServletConfig servletConfig)
        throws ServletException
    {
        logger.error("into init() method..");
        Object o = verifylicense();
        System.out.println("return value is: " + o.toString());
        logger.error("return value is: " + o.toString());

        if (verifylicense())
        {
            System.out.println("verifylicense ERROR");
            logger.error("verifylicense ERROR");

            Runtime runtime = Runtime.getRuntime();
            try
            {
                System.out.println("verifylicense failed, killall java");
                logger.error("verifylicense failed, killall java");
                runtime.exec("killall java");
            }
            catch (Exception e1)
            {
                // TODO Auto-generated catch block
                e1.printStackTrace();
            }
        }
        else
        {
            System.out.println("verifylicense OK");
            logger.error("verifylicense OK");
        }
        logger.error("after verify_license~~~~");
    }
}

问题补充：把有main的License.java换成一个Thread，在tomcat启动时去创建这个Thread并执行，native方法貌似一直返回的是true，这是为什么呀？