Reverse Proxy The difference between a reverse proxy and a forward proxy is that the forward proxy proxies the client; the reverse proxy proxies the server. In reverse proxy, the client is unaware of the proxy because the client does Read more
Function Can constitute a stack of interceptors to complete specific functions, such as logging, login judgment, permission check and so on. Benefits Interceptors also allow you to modularize generic code as reusable classes. Applications of interceptors: AOP; needs some business Read more
Introduction An Optional is a container object which may or may not contain a non-null value. It was introduced in Java 8 to cure the curse of NullPointerExceptions. In essence Optional is a wrapper class which contains a reference to Read more
foreach list.forEach(System.out::println); map List<Integer> numbers = Arrays.asList(3, 2, 2, 3, 7, 3, 5); List<Integer> squaresList = numbers.stream().map( i -> i*i).distinct().collect(Collectors.toList()); filter List<String>strings = Arrays.asList("abc", "", "bc", "efg", "abcd","", "jkl"); // count empty strings long count = strings.stream().filter(string -> string.isEmpty()).count(); List<UserInfo> Read more
Official Doc: https://docs.docker.com/engine/install/ubuntu/ Run the following command to uninstall all conflicting packages: for pkg in docker.io docker-doc docker-compose docker-compose-v2 podman-docker containerd runc; do sudo apt-get remove $pkg; done Set up Docker’s apt repository. # Add Docker's official GPG key: sudo Read more
What Causes the Error? The error is generally caused by a malfunctioning plugin, script, or code that prevents WordPress from functioning properly. If you don’t fix this problem, WordPress won’t be able to load the other files it requires. Another Read more
0. Data Preparation /*Table structure for table `user` */ DROP TABLE IF EXISTS `user`; CREATE TABLE `user` ( `id` int(11) NOT NULL auto_increment, `username` varchar(32) NOT NULL, `birthday` datetime default NULL, `sex` varchar(10) default NULL, `address` varchar(256) default NULL, PRIMARY Read more
Basic JavaBean we use: public class AccountBean { private int id; private String name; private String email; private String address; private Birthday birthday; //getter、setter @Override public String toString() { return this.name + "#" + this.id + "#" + this.address + Read more
1. Introduction In this article, we’ll compare the Gson and Jackson APIs for serializing and deserializing JSON data to Java objects and vice-versa. Gson and Jackson are complete libraries offering JSON data-binding support for Java. Each are actively developed open-source projects which offer to Read more
The React useMemo Hook returns a memoized value. The useMemo Hook can be used to keep expensive, resource intensive functions from needlessly running. Think of memoization as caching a value so that it does not need to be recalculated. The useMemo Hook only runs when one Read more