Android network programming overview
First, understand the following questions:
1. Android system network related API interface
1),java.net.* (standard Java interface)
java.net.* Provide networking related classes, including stream, packet socket, internet protocol, common Http processing, etc. For example, create URL s, URLConnection/HTTPU ...
Posted by CircularStopSign on Thu, 31 Mar 2022 04:38:17 +0300
0 environment1 objectives2. Principle of okhttp framework3 interface display4 core code
4.1 UI designNetwork installation framework4.3 use the network framework to connect the background data and display the data results in the APP 5 code warehouse6 Summary
Code writing and interface effect display in Android Stu ...
Posted by bubazoo on Thu, 31 Mar 2022 04:37:36 +0300
At present, there are few stand-alone systems. Complex systems are composed of many different services. Different services are deployed on different machines, including databases, which are also distributed storage. Inevitably, there will be a scenario where one server calls the methods of another server. For example, server a w ...
Posted by Devsense on Thu, 31 Mar 2022 02:03:42 +0300
There are two ways to create a String object:
String str1 = "abcd";//First check whether there is "abcd" in the string constant pool. If not, create one, and then str1 points to the object in the string constant pool. If so, directly point str1 to "abcd";
String str2 = new String("abcd");//Create a new object in the heap
Posted by susrisha on Thu, 31 Mar 2022 01:09:54 +0300
1, Introduction to RBAC
1.1 introduction to RBAC
RBAC is Role-Based Access Control. In RBAC, permissions are associated with roles, and users get the permissions of these roles by becoming members of appropriate roles. This greatly simplifies the management of permissions. In this way, the management is hierarchical and interdepend ...
Posted by pragma on Wed, 30 Mar 2022 19:12:16 +0300
Stepping on the pit - Nacos + spin gateway + Shiro to realize distributed authentication authority framework
basic function Version DescriptionCertification Center ImplementationGateway implementationEffect presentation Simple explanation
Our company belongs to the communication industry, and the pr ...
Posted by blueguitar on Wed, 30 Mar 2022 07:27:35 +0300
What is Maven?
Nowadays, we need to use many third-party class libraries to build a project. For example, writing a Web project using Spring requires the introduction of a large number of jar packages. The number of jar packages in a project often makes us stunned, and the relationship between jar packages is complex. One jar package often ref ...
Posted by waltonia on Wed, 30 Mar 2022 07:17:50 +0300
hadoop cluster construction
1, Machine preparation2, Install JDK3, Configure ssh password free login4, Establish the mapping between host name and ip5, Installing and configuring hadoop
1. Unzip the hadoop installation package to / opt/module and configure the environment variables2. Configure the core site under / opt/module/hadoop-2.7.2/e ...
Posted by edtlov on Wed, 30 Mar 2022 04:58:27 +0300
First look at the UML of shiro filter
Request scenario where there is already a cookie to save sessionId: 1. The first time a request passes through shiro's filter onceprequestfilter, it will wrap the request and response into ShiroHttpServletRequest and ShiroHttpServletResponse, and set an attribute ID in the request. The purpose is that whe ...
Posted by ditusade on Tue, 29 Mar 2022 16:10:47 +0300