javaweb学习

• HelloWorld 27天成为Java大神 学习

# 开发环境的搭建和HelloWorld运行
# 下载jdk,通常是 OpenJDK 8 (LTS),并安装
# 下载地址: https://adoptopenjdk.net/
which java
# /usr/bin/java
# macos 安装之后的位置: javahome
/Library/Java/JavaVirtualMachines/adoptopenjdk-[VERSION].jdk/Contents/Home
# 我安装的是 /Library/Java/JavaVirtualMachines/adoptopenjdk-14.jdk/Contents/Home

//  HelloWorld.java
class HelloWorld {
    public static void main(String[] args) {
        System.out.println("HelloWorld");
    }
}

• JSP (只作为了解,过时了)

  # 环境搭建,下载 tomcat 服务器: https://tomcat.apache.org/download-90.cgi 选择: Core: zip (pgp, sha512)
  # 解压文件之后运行
  /Volumes/exfat/apache-tomcat-9.0.39/bin/startup.sh
  # 以下是运行之后的输出,然后访问 http://localhost:8080/ 即可
  jcleng@192  ~  /Volumes/exfat/apache-tomcat-9.0.39/bin/startup.sh
  Using CATALINA_BASE:   /Volumes/exfat/apache-tomcat-9.0.39
  Using CATALINA_HOME:   /Volumes/exfat/apache-tomcat-9.0.39
  Using CATALINA_TMPDIR: /Volumes/exfat/apache-tomcat-9.0.39/temp
  Using JRE_HOME:        /Library/Java/JavaVirtualMachines/adoptopenjdk-14.jdk/Contents/Home
  Using CLASSPATH:       /Volumes/exfat/apache-tomcat-9.0.39/bin/bootstrap.jar:/Volumes/exfat/apache-tomcat-9.0.39/bin/tomcat-juli.jar
  Using CATALINA_OPTS:
  Tomcat started.
  # 停止服务
  /Volumes/exfat/apache-tomcat-9.0.39/bin/shutdown.sh
  
  # 默认的文件目录
  /Volumes/exfat/apache-tomcat-9.0.39/webapps/ROOT
  # 创建一个文件 test.jsp
  <%@ page contentType="text/html;charset=UTF-8" %>
  <%
  out.print("jsp页面");
  %>
  # 访问即可
  http://localhost:8080/test.jsp
  

• Servlet

• JDBC的操作数据库

• JSTL

• SSH/SSM

• spring

• springMVC

• springBoot

• docker部署