1. 配置pom文件，添加maven依赖
<?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>org.smart4j</groupId>
<artifactId>chapter1</artifactId>
<version>1.0-SNAPSHOT</version>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.6.2</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<version>2.22.0</version>
<configuration>
<skipTests>true</skipTests>
</configuration>
</plugin>
</plugins>
</build>
<packaging>war</packaging>
<dependencies>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>3.1.0</version>
</dependency>
<dependency>
<groupId>javax.servlet.jsp</groupId>
<artifactId>jsp-api</artifactId>
<version>2.1</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
</dependencies>
</project>
2. 右击pom.xml，点击Reimport，下载依赖库
3. 编写servlet类
package org.smart4j.chapter1;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
@WebServlet("/hello")
public class HelloServletextends HttpServlet {
@Override
public void doGet(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {
DateFormat dateFormat =new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
String currentTime = dateFormat.format(new Date());
request.setAttribute("currentTime", currentTime);
request.getRequestDispatcher("/WEB-INF/jsp/hello.jsp").forward(request, response);
}
}
4. 编写jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>hello</title>
</head>
<body>
<h1>Hello!</h1>
<h2>${currentTime}</h2>
</body>
</html>
5. 点击IDEA运行按钮，部署至tomcat
6. 在输入http://localhost:8080/chapter1_war/hello测试
