从零开始写JavaWeb框架（第一章节）

买了本《从零开始写JavaWeb框架》

因为是第一次用IDEA，期间遇到很多问题，比如：怎么在IDEA中配置tomcat：

在IDEA界面的右上角点击：

 

点击+，选择Maven

到了如下界面：

 

在Name中输入tomcat，在Command line中输入tomcat7:run，然后点击apply。

然后就可以运行了。

 

 

第一章节如下：

pom.xml

<?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>1.0.0</version>
    <packaging>war</packaging>
    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    </properties>
    <dependencies>
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>3.1.0</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>javax.servlet.jsp</groupId>
            <artifactId>jsp-api</artifactId>
            <version>2.2</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>jstl</artifactId>
            <version>1.2</version>
            <scope>runtime</scope>
        </dependency>
    </dependencies>
    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.3</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>2.18.1</version>
                <configuration>
                    <skipTests>true</skipTests>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.apache.tomcat.maven</groupId>
                <artifactId>tomcat7-maven-plugin</artifactId>
                <version>2.2</version>
                <configuration>
                    <path>/${project.artifactId}</path>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

 

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://java.sun.com/xml/ns/javaee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
                  http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
         version="3.0">
</web-app>

 

HelloServlet.java

package org.smart4j.chapter1;

/**
 * Created by sahara on 2016/3/13.
 */
import java.io.IOException;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

@WebServlet("/hello")
public class HelloServlet extends HttpServlet {

    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp)
        throws ServletException, IOException {
        DateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        String currentTime = dateFormat.format(new Date());
        req.setAttribute("currentTime", currentTime);
        req.getRequestDispatcher("/WEB-INF/jsp/hello.jsp").forward(req, resp);
    }
}

hello.jsp

 <%@ page contentType="text/html;charset=UTF-8" language="java" %>
 <html>
   <head>
     <title>Hello</title>
   </head>
   <body>
        <h1>${currentTime}</h1>
   </body>
 </html>

 

最后：

 

posted @ 2017-09-16 19:01  虚极静笃  Views(1024)  Comments(0)    收藏  举报