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1. Parameter type of JVM Tools documentation https://docs.oracle.com/javase/8/docs/technotes/tools/unix/ 1. Standard parameters         2. - X parameters Nonstandard parameter: it may be different in different versions of JVM java defaults to mixed mode For example, change java mode to interpretation mode: java -Xint -version ...

Problems encountered in using JSTL 1.2 JSP code <%@ page language="java" contentType="text/html; charset=GB18030" pageEncoding="GB18030" isELIgnored="true"%> <%-- <%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %> --%> <%@ taglib uri="http://java.sun.com/jstl/core_rt" prefix="c" %> ...

1. Why use thread pool? Is the more thread pools the better? Thread is an object in java, but also a resource of operating system. It takes time for thread creation and destruction. If create time + destroy time > execute task time, it is not cost-effective. Java objects occupy heap memory, and operating system threads occupy system mem ...

Catalog 1. Introduction to Dichotomy 2. Binary Search Tree Definition 3. CRUD of Binary Search Tree 4. Two extreme cases of binary search trees 5. Summary of Binary Search Tree Preface stay [Algorithm 04] Tree and Binary Tree In this article, we will expand our explanation on the bas ...

Listening to different ports The default commodity of nginx is port 80. If there is a server service in the configuration file, you can copy multiple servers below if you need more than one. Listen to different ports to change the corresponding configuration server { listen 80; # Listening port number, 80 by def ...

In order to debug the SpringMVC code in the Spring source project, using Tomcat plug-in is more convenient, then you need to simulate the function of SpringBoot like yourself: start the Spring application, embedded Tomcat and do a good job of correlation. Why is it so troublesome??? Because I am a common Java project, the basic web.xml file, I ...

Source code for this article: GitHub. Click here || GitEE. Click here Introduction to Servlet Server-side programs written in Java have platform-independent and protocol-independent features. Their main functions are to interactively browse and generate data and generate dynamic Web content.Using the Servlet, you can collect user input from w ...

Cookie understanding Each web application will send its own set of cookies to each browser. The backend can operate these sets of cookies. Cookies between applications are independent (set cookies, which can be shared between applications) Reading, writing and deleting cookies package com.my.test.web; import javax.servlet.S ...

What I built is that springboot is version 4.x, which sometimes brings a lot of problems Question 1 In the beginning, when we used the lower version, we configured json to return <!--&lt;!&ndash; https://mvnrepository.com/artifact/org.codehaus.jackson/jackson-core-asl &ndash;&gt; <dependency> ...

1. Generate a certificate. You can use self signed certificate or obtain it from SSL certificate authority center In JDK, keytool is a certificate management tool, which can generate self signed certificates. Here, use the keytool provided by JDK to create certificate tests Open cmd window, enter command keytool -genkey -ali ...