使用idea新建一个maven项目

谁践踏了优雅 2022-04-03 09:16 404阅读 0赞

前段时间写下了一篇文章： idea 如何新建一个Maven项目并且写第一个servlet 地址如下：

[https://mp.csdn.net/postedit/85029145][https_mp.csdn.net_postedit_85029145]

因为本人刚开始使用idea,对于idea的知识还不是很熟练，那篇文章本身没有问题，但是我在将用那种方法新建的工程要打成war包的时候出问题了，所以使用同事的方法重新新建了一遍maven工程之后就好了，接下来，我就讲这种方法写下来，记录一下，方便日后查看。

一。

1.首先new --> Project

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xpdXlpbmcxODAyMDI4OTE1_size_16_color_FFFFFF_t_70][]

选择maven 工程，并且勾选 Create from archetype ，并且选择骨架进行创建： 如图选择： maven-archetype-webapp 骨架

点击下一步

2.填写GroupId 和 ArtifactedId

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xpdXlpbmcxODAyMDI4OTE1_size_16_color_FFFFFF_t_70 1][]

3.点击下一步，填写maven相关设置，这里就不多说了

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xpdXlpbmcxODAyMDI4OTE1_size_16_color_FFFFFF_t_70 2][]

4.点击下一步，继续填写相关，这里不再赘述，点击finish 然后使用新窗口打开

二。打开新工程之后：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xpdXlpbmcxODAyMDI4OTE1_size_16_color_FFFFFF_t_70 3][]

看结构，main下面只有一个webapp文件夹，webapp下面有web.xml,并且这个工程也有pom文件，这就是一个新的Maven工程，接下来我们写一个servlet.

2.接下来，新建java文件夹和respurces文件夹

在main 上 新建一个Directory  (java)  
![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xpdXlpbmcxODAyMDI4OTE1_size_16_color_FFFFFF_t_70 4][]

3.然后右键 Mark Directory as Source Root  
![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xpdXlpbmcxODAyMDI4OTE1_size_16_color_FFFFFF_t_70 5][]

4.接下来我们会看到 java文件夹会变为 绿色

![20181221150618487.png][]

5.同理 新建resources 文件夹，然后右键 Mark Directory as Resource Root  
![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xpdXlpbmcxODAyMDI4OTE1_size_16_color_FFFFFF_t_70 6][]

6.之后再java下面新写一个Servlet

package com.tingyun.demo.servlet;
    
    import javax.servlet.ServletException;
    import javax.servlet.http.HttpServlet;
    import javax.servlet.http.HttpServletRequest;
    import javax.servlet.http.HttpServletResponse;
    import java.io.IOException;
    import java.io.PrintWriter;
    
    public class HelloServlet extends HttpServlet {
        @Override
        protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
            PrintWriter out = response.getWriter();
            try {
                request.setCharacterEncoding("UTF-8");
    
                response.setContentType("text/html; charset=utf-8");
                response.setCharacterEncoding("UTF-8");
                String userId = request.getParameter("userId");
                String pwd = request.getParameter("pwd");
                if("admin".equals(userId) && "password".equals(pwd)){
                    out.println("success");
                }else{
                    out.println("fail");
                }
                out.println("<br/>");
                String servletPath = this.getServletContext().getRealPath("/");
                out.println(servletPath);
                out.close();
    
            } catch (Exception e) {
                // TODO: handle exception
            }
        }
    }

注意在写这个Servlet之前，首先要在pom文件中引入对servlet的依赖

<dependency>
          <groupId>javax.servlet</groupId>
          <artifactId>javax.servlet-api</artifactId>
          <version>3.1.0</version>
        </dependency>

然后再web.xml中配置这个Servlet

<!DOCTYPE web-app PUBLIC
     "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
     "http://java.sun.com/dtd/web-app_2_3.dtd" >
    
    <web-app>
      <display-name>Archetype Created Web Application</display-name>
    
      <servlet>
        <servlet-name>HelloServlet</servlet-name>
        <servlet-class>com.tingyun.demo.servlet.HelloServlet</servlet-class>
      </servlet>
      <servlet-mapping>
        <servlet-name>HelloServlet</servlet-name>
        <url-pattern>/hello</url-pattern>
      </servlet-mapping>
    
    </web-app>

之后配置tomcat ,启动

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xpdXlpbmcxODAyMDI4OTE1_size_16_color_FFFFFF_t_70 7][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xpdXlpbmcxODAyMDI4OTE1_size_16_color_FFFFFF_t_70 8][]

启动后，访问：[http://localhost:8080/httpdemo/][http_localhost_8080_httpdemo]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xpdXlpbmcxODAyMDI4OTE1_size_16_color_FFFFFF_t_70 9][]

这是一个HelloWorld页面，访问的是 index.jsp页面

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xpdXlpbmcxODAyMDI4OTE1_size_16_color_FFFFFF_t_70 10][]

如何访问： [http://localhost:8080/httpdemo/hello][http_localhost_8080_httpdemo_hello]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xpdXlpbmcxODAyMDI4OTE1_size_16_color_FFFFFF_t_70 11][]

这个路径就是访问HelloServlet,至此简单的Servlet写完了，方便日后查看

[https_mp.csdn.net_postedit_85029145]: https://mp.csdn.net/postedit/85029145
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xpdXlpbmcxODAyMDI4OTE1_size_16_color_FFFFFF_t_70]: /images/20220403/74f5d9a82c5c4f2da578eaf195c2b5c2.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xpdXlpbmcxODAyMDI4OTE1_size_16_color_FFFFFF_t_70 1]: /images/20220403/d7d779fc637b4a1c905c038e34606889.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xpdXlpbmcxODAyMDI4OTE1_size_16_color_FFFFFF_t_70 2]: /images/20220403/ed1ec2acea0a4202afbe695dedc344bf.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xpdXlpbmcxODAyMDI4OTE1_size_16_color_FFFFFF_t_70 3]: /images/20220403/ff5e1f4762de4c8bb9bbdeab55b8376a.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xpdXlpbmcxODAyMDI4OTE1_size_16_color_FFFFFF_t_70 4]: /images/20220403/9604641237d14c78a20c6f91a324cc58.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xpdXlpbmcxODAyMDI4OTE1_size_16_color_FFFFFF_t_70 5]: /images/20220403/3b4ebc392596446990d3e6919122a263.png
[20181221150618487.png]: /images/20220403/568eae75fb3e417aa466f02f2c1f499d.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xpdXlpbmcxODAyMDI4OTE1_size_16_color_FFFFFF_t_70 6]: /images/20220403/cd8831e07090490f879b72b00c7a035e.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xpdXlpbmcxODAyMDI4OTE1_size_16_color_FFFFFF_t_70 7]: /images/20220403/55e021605d154635893a7e751501d351.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xpdXlpbmcxODAyMDI4OTE1_size_16_color_FFFFFF_t_70 8]: /images/20220403/7218d07ad78a41ca814b664f80f69248.png
[http_localhost_8080_httpdemo]: http://localhost:8080/httpdemo/
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xpdXlpbmcxODAyMDI4OTE1_size_16_color_FFFFFF_t_70 9]: /images/20220403/995e49a6f55a49fbb7ada02ea6616ef2.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xpdXlpbmcxODAyMDI4OTE1_size_16_color_FFFFFF_t_70 10]: /images/20220403/bfabe638e725443dae683bd3d9e394e3.png
[http_localhost_8080_httpdemo_hello]: http://localhost:8080/httpdemo/hello
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xpdXlpbmcxODAyMDI4OTE1_size_16_color_FFFFFF_t_70 11]: /images/20220403/ccd455366f5741f1bdeeecb33e748572.png