内容简介：Tomcat修改目录下的
Tomcat
修改端口号
修改目录
/opt/apache-tomcat-9.0.16/conf
下的
servle.xml
<Connector port="8080" protocol="HTTP/1.1"
connectionTimeout="20000"
redirectPort="8443" />
修改即可
重启从新加载
虚拟目录
新建文件
/home/ming/demo
然后WEB-INF文件中增加web.xml文件
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
version="4.0">
</web-app>
然后接着，继续修改servle.xml文件
<Valve className="org.apache.catalina.valves.AccessLogValve" directory="logs"
prefix="localhost_access_log" suffix=".txt"
pattern="%h %l %u %t "%r" %s %b" />
<Context path="/" docBase="/home/ming/demo/"/>
接着在目录下新建jsp文件
<%
out.println("hello world");
%>
此时，访问的时候，会生成 java 文件，再次编译成为class文件
在work文件里可以找到。日志在log文件里。
交互性
<form class="" action="index.jsp" method="post"> <input type="text" name="info"> <input type="submit" name="" value="show"> </form>
<%
String str = request.getParameter("info");
out.println(str);
%>
jsp
定义局部变量
<%--
Created by IntelliJ IDEA.
User: ming
Date: 19-3-6
Time: 下午9:29
To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>$Title$</title>
</head>
<body>
<%
int x = 10;
String info = "ming";
out.println(x + info);
%>
</body>
</html>
全局变量
全局变量是<%!%>
表达式输出
<%--
Created by IntelliJ IDEA.
User: ming
Date: 19-3-6
Time: 下午9:29
To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>$Title$</title>
</head>
<body>
<%
String info = "ming";
%>
<h3>info = <%=info%></h3>
</body>
</html>
循环输出列表
<%--
Created by IntelliJ IDEA.
User: ming
Date: 19-3-6
Time: 下午9:29
To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>$Title$</title>
</head>
<body>
<table border=="1" width="100%">
<%
int rows = 10;
int cols = 10;
for(int x = 0; x < rows; x++){
%>
<tr>
<%
for(int y = 0; y < cols; y++){
%>
<td><%=(x * y)%></td>
<%
}
%>
</tr>
<%
}
%>
</table>
</body>
</html>
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