Timer,单例redis,HttpClient,反射手记

系统管理员 2022-06-15 11:56 171阅读 0赞

工作之余有时候会做一些测试，或者随便写点什么东西，最近在清理东西，感觉有那么点用的我将会记录至此。

public class t {
    // --------------------------------------------------------------------------------------
        static Jedis j ;
        static int i=0;
        public static void main(String[] args) {
    
            Timer  t =new Timer ();
            aa a =new aa();
    
             j =new Jedis("20.4.16.9",6379);//搞个redis 的对象
    
            t.schedule(a,new Date(),1000);//即时执行run，1000ms执行一次，常用的timer用法
        /*  
         * timer执行匿名类，效果同上
         * t.schedule(new TimerTask() {
                @Override
                public void run() {
                    i++;
                    UUID u=UUID.randomUUID();
                    j.hset("t", u.toString(),"CESHI");
                    System.out.println("DatesourceTest1.aa.run()"+i);
                    //System.out.println("t.main(...).new TimerTask() {...}.run()");
                }
            }, new Date(),1000);*/
    
        }
            static class aa extends TimerTask{
                @Override
                public void run() {
                    i++;
                    UUID u=UUID.randomUUID();
                    j.hset("test", u.toString(),""+i);//redis接口操作，方法很多，自行查找
                    System.out.println("DatesourceTest1.aa.run()"+i);
                }
    
            }
    // --------------------------------------------------------------------------------------
    
    /*  public static void main(String[] args) throws Exception {
            User u =new User();
            u.setId(5);
            User e =new User();
            e.setId(5);
            System.out.println(u.equals(e));//false
            System.out.println(User.class);
            Field[] fields = u.getClass().getDeclaredFields();//通过反射获取所有此对象的属性
            for (Field field : fields) {
                System.out.println(field);
            }
        }
        */
    // -------------------------------------------------------------------------------------- 
    
    /* 
     import org.apache.http.HttpEntity;
    import org.apache.http.client.methods.CloseableHttpResponse;
    import org.apache.http.impl.client.HttpClients;
     * 
     *应伙计之邀，写的爬取深圳交易所 每天的  股票平均市盈率。。。。简单的循环，现仅取一个月的。
     * 
        for(int a =1;a<=30;a++){
                CloseableHttpClient httpClient=HttpClients.createDefault(); 
                CloseableHttpResponse response=null;
            HttpPost httpGet=new HttpPost("http://www.szse.cn/szseWeb/FrontController.szse?ACTIONID=7&AJAX=AJAX-TRUE&CATALOGID=1803&TABKEY=tab1&txtQueryDate=2017-04-"+a);
            httpGet.setHeader("User-Agent", "Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:50.0) Gecko/20100101 Firefox/50.0");
             response=httpClient.execute(httpGet);
            HttpEntity entity=response.getEntity(); 
            String s =EntityUtils.toString(entity, "gb2312");
            if(s.length()<5000){
                System.out.println("股票平均市盈率 "+"今天周末，没有数据 "+" 2017-05-"+a);
            }else{
                int indexOf = s.indexOf("股票平均市盈率");
                System.out.println("股票平均市盈率 "+s.substring(indexOf+33, indexOf+38)+" 2017-05-"+a);
            }
            response.close(); 
            httpClient.close(); 
            }*/
    // -------------------------------------------------------------------------------------- 
    /*  
        public static void main(String[] args) {
            String s ="asdagfrhgdffw4ywerhaegw";
            int i =s.length();
            for (int j = 0; j <i; j++) {
                System.out.print(s.charAt(j)+" ");
            }
        }*/
    // -------------------------------------------------------------------------------------- 
    /*
     * 
     *  public static void main(String[] args) {
    
            new Thread(new Runnable(){
                @Override
                public void run() {
                    System.out.println("ssss");
                }
            }).start();
            System.out.println("t.main()");
    
        }*/
        //-------------------------------------------------------------------------------------- 
    
     public static void main(String[] args) throws Exception { 
        // Class s =A.class;
    // A newInstance = null;
        // Class s1=new A().getClass();
        // System.out.println(s==s1); //true
    
    /*  
     * 通过反射获取所有属性
     * 
     *   Field[] field = s.getDeclaredFields();  
    
    
             for (Field field2 : field) {
                System.out.println( field2.getName());  //属性名称
            }*/
    
        /*
         * 通过反射获取所有属性的值
         *  Field[] field = s.getDeclaredFields();  
                for (int i = 0; i < field.length; i++) {  
                    // 权限修饰符 
                    int mo = field[i].getModifiers();  
                    String priv = Modifier.toString(mo);  
                    // 属性类型 
                    Class<?> type = field[i].getType();             //type.getName()属性的修饰符
                    System.out.println(priv + " " + type.getName() + " "  
                            + field[i].getName() + ";");
           */
    
    
    /*
     * 通过反射获取某个属性的值
                    Method[] methods = s.getMethods();
                    for (Method method : methods) {
                        System.out.println(method);
                    }
                    Method method = s.getMethod("getName");
                    System.out.println(method.invoke(new A()));
        */
    
    
    
    /*
     * 通过反射获取某个属性的值
     * 
     * (即时修改，前台传数据，后台反射获得属性修改)
     *  
     *  enumtOString(s,"Name");
    
    
        }
        public static void enumtOString(Class s ,String name) throws Exception{
            Method method = s.getMethod("get"+name);
            String invoke = (String)method.invoke(s.newInstance());
            System.out.println(invoke);
        }*/
    
    
    
            //System.out.println(s.getClassLoader().getClass().getName());
    
        //}
    //-----------------------------------------------------------------------
    
    /*  static int i=2;
        int geta(){
            return i++;
        }
        public static void main(String[] args) {
    
            String s ="jd.com.".replaceAll(".","/");//+"MyClass.class";
            //s.replaceAll(".", "/");
            System.out.println(s);
        //System.out.println(6*(2^2));
    
    
            System.out.println(new t().geta());
            System.out.println(new t().geta());
            System.out.println(i);
        }*/
    
    }