JSP (2) - JSP Action Element

Preface: The last article talked about the instructions in JSP, which are often used in the development of WEB in peacetime. But the JSP action elements in this article are seldom used in the development of peacetime. Just know something about them. Text: JSP action elements are used to control the behavior of JSPs and perform some comm ...

Posted on Sat, 01 Jun 2019 14:35:40 -0700 by Billy2007

Automatic assembly and scope of bean s in spring

Last blog spring dependency injection Several methods of dependency injection are introduced. Today, let's look at autowire. Create a java project with the following structure UserDao code public interface UserDao { public void getUser(); }UserDaoImpl code public class UserDaoImpl implements UserDao{ @Override public void getUser() { ...

Posted on Sat, 01 Jun 2019 12:44:48 -0700 by someguyhere

Android development uses https and Webview to access https pages

HTTPS introduction HTTPS(Hyper Text Transfer Protocol Secure) is a kind of HTTP based on SSL/TLS. All HTTP data is transmitted on the encapsulation of the SSL/TLS protocol. HTTPS protocol is based on HTTP protocol, which adds the handshake of SSL/TLS and data encryption transmission. It also belongs to the application layer protocol. Therefore ...

Posted on Fri, 31 May 2019 16:35:45 -0700 by brucemalti

Implementation of tomcat session server based on memcached

brief introduction Every time we log in to Taobao, no matter on any host or mobile phone, the contents of our shopping cart will not change. How can we do that? That's by saving sessions on the server side. Usually, websites like Taobao have so many visits and there are many hosts on the server, so we don't necessarily use the same backend ...

Posted on Mon, 27 May 2019 16:54:28 -0700 by chacha102

Basic usage of git

This blogger just contacted git some time ago. Since git has not been used before, and as an ideal rookie in the front-end session, he should master the basic use of git, so he spent some time in private to learn the basic use of git. In the process of learning, he also summarized some opinions and experiences, so I will share them here. Next ...

Posted on Mon, 27 May 2019 14:41:07 -0700 by SithLordKyle

Summary of methods for ORACLE to get values of SQL-bound variables

This article summarizes how to obtain the values of SQL-bound variables in ORACLE databases, which are often used in SQL optimization tuning.In this comb, summarize, aspects in the future to find, read.     Method 1: Query V$SQL   The BIND_DATA field in the V$SQL view stores the value of the bound variable, but querying the value of the bound v ...

Posted on Mon, 27 May 2019 13:06:13 -0700 by mj_23

dataguard primary and standby switching

Summary of dataguard backup switching: On Switching Commands of Main and Standby Warehouses On the main library SQL> select switchover_status from v$database 2 / SWITCHOVER_STATUS -------------------- FAILED DESTINATION Should be the main reserve monitoring failed to start the main reserve monitoring, and then SQL> select sw ...

Posted on Sun, 26 May 2019 16:34:14 -0700 by justbane

Step by step learning WebSocket (1) declarative WebSocket

This section describes declarative WebSocket programming, which can be used with the latter article Programming WebSocket Contrastive learning:First, go to the server:@ServerEndpoint("/chat") public class DeclarativeServer {     @OnOpen       public void onOpen(Session&n ...

Posted on Sun, 26 May 2019 15:12:48 -0700 by maxtech

Spring 5 Source Parsing-Processing Interceptor in Spring

In Java Web applications, filters are often used to capture HTTP requests. But they are reserved only for webapps. Spring introduces a new approach to implementation, more commonly known as handler interceptors. This paper will be divided into three parts. The first part is about the theoretical concept of Spring handler interceptor. The second ...

Posted on Sun, 26 May 2019 12:18:18 -0700 by Mce

Wechat Public Number Development (11) Generation of Two-Dimensional Codes with Parameters

The public platform provides an interface for generating two-dimensional codes with parameters. Using this interface, multiple two-dimensional codes with different scene values can be obtained. After the user scans, the public number can receive event push. There are currently two types of two-dimensional codes: 1. Temporary two-dimensional ...

Posted on Fri, 24 May 2019 15:04:58 -0700 by HeyRay2