Detailed tutorial on running Tomcat in debug mode in IDEA Maven project

1. Add the following dependencies in pom.xml

<dependency>
 <groupId>javax.servlet</groupId>
 <artifactId>javax.servlet-api</artifactId>
 <version>3.0.1</version>
 <scope>provided</scope> // This is the scope</dependency>
<dependency>
 <groupId>javax.servlet.jsp</groupId>
 <artifactId>jsp-api</artifactId>
 <version>2.2</version>
 <scope>provided</scope> // This is the scope</dependency>

Note: It needs to be placed in <dependencies></dependencies> , otherwise an error will be reported

I use mvn tomcat:run, which will lead to a problem: although I configure tomcat7, tomcat6 is used by default, and tomcat6 does not support jdk1.8. Here you need to add the tomcat7-maven-plugin plug-in. Note: If your version is tomcat7-maven-plugin 2.0, since it does not support jdk 1.8, just replace it with tomcat7-maven-plugin 2.2. Add the following code in pom.xml:

<plugin>
 <groupId>org.apache.tomcat.maven</groupId>
 <artifactId>tomcat7-maven-plugin</artifactId>
 <version>2.2</version>
</plugin>

That's it.

"IDEA maven cannot import static files such as css, js, img, etc."
Add in web.xml (add whatever files need to be intercepted)

<servlet-mapping>
 <servlet-name>default</servlet-name>
 <url-pattern>*.js</url-pattern>
 <url-pattern>*.css</url-pattern>
 <url-pattern>*.map</url-pattern>
 <url-pattern>*.jpg</url-pattern>
 <url-pattern>*.png</url-pattern>
 <url-pattern>*.eot</url-pattern>
 <url-pattern>*.svg</url-pattern>
 <url-pattern>*.ttf</url-pattern>
 <url-pattern>*.woff</url-pattern>
 <url-pattern>*.otf</url-pattern>
 <url-pattern>*.woff2</url-pattern>
 <url-pattern>*.gif</url-pattern>
</servlet-mapping>

Add to the jsp page:

<%
 String path = request.getContextPath();
 String basePath = request.getScheme() + "://"
   + request.getServerName() + ":" + request.getServerPort()
   + path + "/";
%>

Then you can directly reference bathPath, such as:

<link rel="stylesheet" href="<%=basePath%>/css/bootstrap.min.css" rel="external nofollow" type="text/css">

Tomcat created by Maven, running in debug mode

1. First enter the edit structure.

2. Select the green "+" sign and scroll down to find the "Maven" option and click it.

3. Select the project to be debugged.

4. Just run the debug program.

5. Copy this path + file directory and you can access it

Modify the front-end code of the Maven project, click somewhere else, and refresh the webpage without restarting Maven.

Note:

This deployment is only useful for jsp page modification, not for Servlet, and also cannot recognize html

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