我想使用Apache POI在Java中读写Excel文件。我将 Maven 用于依赖项，但是在导入时出现错误：Cannot resolve symbol usermodel例如。
这些是我的进口：
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
这是我的 POM：
<?xml version="1.0" encoding="UTF-8"?>
<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/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>groupId</groupId>
<artifactId>Boekhouding</artifactId>
<version>1.0-SNAPSHOT</version>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>1.7</source>
<target>1.7</target>
</configuration>
</plugin>
</plugins>
</build>
<dependencies>
<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi-3.17</artifactId>
<version>3.10-FINAL</version>
<systemPath>${basedir}\src\lib\poi-3.17.jar</systemPath>
</dependency>
<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi-ooxml</artifactId>
<version>${apache.poi.version}</version>
<systemPath>${basedir}\src\lib\poi-ooxml-3.17.jar</systemPath>
</dependency>
</dependencies>
</project>
我试图用c ++简单地猜测我的数字游戏,但计算机需要猜测我的数字.但问题是我陷入了这种无限循环.我只是一个初学者,所以这是一个非常基本的程序.
这是我的代码:
int secretNumber = rand() %100 + 1; // random number between 1-100
int tries=0;
int input;
cout <<"typ your number\n";
cin >> input;
do
{
cout <<secretNumber <<endl;
++tries;
if (secretNumber > input)
{
cout <<"To high i guess?\n";
}
else if (secretNumber < input)
{
cout <<"To low I guess?\n";
}
else
{
cout <<"Yes, i got it in " <<tries <<" tries!";
}
}while (input != secretNumber);
return 0;
}
我想通过 node.js 使用 localhost 访问我的 .html。我为此使用了 express 框架。我的 .html 包含一些 CSS，但这不会加载 html 文件。
代码：
var express = require('express');
var app = express();
app.use(express.static('public'));
app.engine('.html', require('ejs').renderFile);
app.get('/', function(req, res) {
res.render('FrontPage.html');
});
app.listen(3000, function(){
console.log("listening to 3000");
})
HTML：
<head>
<link rel="stylesheet" type="text/css" href="./css/FrontPageCSS.css">
</head>
<body style="background-image:url(./img/bg.jpg)">
<div id="header">
<a href="./frontPage.html"><img src="./img/Logo.png" height="5%" width="5%" alt="logo"></a>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.4/jquery.min.js"></script>
<script src="./script/FrontPageJS.js"></script>
</div>
<div id="buttonWrapper">
<div id="first" class="first">
This is my first button
</div>
<div id="second" class="second">
This is my second button
</div>
</div> …