12-31 javaee jsp servlet的实现

webserver
apache tomcat

tomcat.apache.org

tomcat 使用
-------------------------
1) 官方下载 apache-tomcat-9.0.30-windows-x64.zip

2) 解压 apache-tomcat-9.0.30-windows-x64.zip 到 c:/tomcat

3) c:/tomcat/bin/startup.bat 为服务器的启动文件，如果点击后窗口自动关闭。应该jdk环境变量没有配置好。

%SystemRoot%\system32;%SystemRoot%;%SystemRoot%\System32\Wbem;%SYSTEMROOT%\System32\WindowsPowerShell\v1.0\;.;D:\jdk\jdk-13.0.1\bin;D:\jdk\jdk-13.0.1\lib;D:\scala-2.13.1\bin;D:\Python38;D:\Python38\Scripts;C:\nodejs\

%SystemRoot%\system32;%SystemRoot%;%SystemRoot%\System32\Wbem;%SYSTEMROOT%\System32\WindowsPowerShell\v1.0\;.;%JAVA_HOME%\bin;%JAVA_HOME%\lib;D:\scala-2.13.1\bin;D:\Python38;D:\Python38\Scripts;C:\nodejs\

4)建立环境变量
JAVA_HOME
CLASSPATH
CATALINA_HOME = c:\tomcat
PATH

12-31 javaee jsp servlet的实现

5)c:/tomat/conf/logging.properties 修改一下
#java.util.logging.ConsoleHandler.encoding = UTF-8
java.util.logging.ConsoleHandler.encoding = GBK

6)bin/startup.bat 启动服务器默认端口8080

http://localhost:8080

12-31 javaee jsp servlet的实现
7)关闭服务器 /bin/shutdown.bat

12-31 javaee jsp servlet的实现
服务器端口号
-------------------------------
tomcat 8080
网络服务器默认是80
http://baidu.com:80
http://baidu.com

http://localhost

如果要修端口号，打开 conf/server.xml

原来是
<Connector port="8080" protocol="HTTP/1.1"
connectionTimeout="20000"
redirectPort="8443" />

在tomcat上部署自己的war项目

java web项目结构

web
webapp
webapp

   /
   WEB-INF
       classes 项目中使用的类
       lib jar
       web.xml 项目的配置文件版本 2.5 3.0 3.1 4.0

META-INF 信息目录

   index.jsp
   index.html
   images/a.jpg

java maven web项目结构

/src/
/main
    /java
   /resources
   /webapp
       /WEB-INF
           /lib
           /classes
           /web.xml
       index.jsp
/text
    /java
/pom.xml maven项目核心配置文件
<?xml version="1.0" encoding="UTF-8"?>

<groupId>org.example</groupId>
<artifactId>webok</artifactId>
<version>1.0</version>
<packaging>war</packaging>

<name>webok</name>

<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>8.0.18</version>
</dependency>
</dependencies>

<build>
<finalName>${project.artifactId}</finalName>
<testSourceDirectory>src/test/java</testSourceDirectory>
<sourceDirectory>src/main/java</sourceDirectory>

<resources>
<resource>
<directory>src/main/java</directory>
<includes>
<include>**/*.xml</include>
<include>**/*.properties</include>
</includes>
</resource>
<resource>
<directory>src/main/resources</directory>
<includes>
<include>**/*.xml</include>
<include>**/*.properties</include>
</includes>
</resource>
</resources>

<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.8.1</version>
<configuration>
<source>13</source>
<target>13</target>
<encoding>UTF-8</encoding>
</configuration>
</plugin>
</plugins>
</build>
</project>

javaweb
   本质servlet开发

   servlet

   tomcat jsp jstl EL servlet

   servlet 模板引擎
   freemarker apache
           thyemleaf html5

web项目两大对象
HttpServletRequest 请求对象 get post
HttpServletResponse 响应对象

get
<a href="save.do?id=6">aaaa</a>

save.java servlet
reqeust.getParamter("id")

上传文件
jspsmartupload
apache commons-fileupload
cos 出版社 O'reilly系列
java servlet 3 实现了上传功能

<%@ page contentType="text/html;charset=utf-8" language="java" %>
<!DOCTYPE html>
<html lang="zh-CN">
<head>
<meta charset="utf-8">
<title>webrx</title>
</head>
<body>
<h3>单文件上传</h3>
<form action="upload" method="post" enctype="multipart/form-data">
照片： <input type="file" name="ufile"> <input type="submit" value="提交">
</form>
</body>
</html>

12-31 javaee jsp servlet的实现

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