Tomcat 8 源码导入到IDEA

1. Tomcat源码地址 http://tomcat.apache.org/download-80.cgi，本文使用的Tomcat版本是apache-tomcat-8.5.41-src。

注意：本文的安装目录在E:apache-tomcat-8.5.41-src，会多次用到，需要替换成自己的。

2. 在apache-tomcat-8.5.41-src根目录下新建pom.xml文件，引入依赖的jar包，文件内容如下

<?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.apache</groupId>
    <artifactId>tomcat</artifactId>
    <name>apache-tomcat-8.5.24</name>
    <version>8.5.24</version>

    <build>
        <finalName>Tomcat-8.5.24</finalName>
        <sourceDirectory>java</sourceDirectory>
        <testSourceDirectory>test</testSourceDirectory>
        <resources>
            <resource>
                <directory>java</directory>
            </resource>
        </resources>
        <testResources>
            <testResource>
                <directory>test</directory>
            </testResource>
        </testResources>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.5.1</version>
                <configuration>
                    <encoding>UTF-8</encoding>
                    <source>1.8</source>
                    <target>1.8</target>
                </configuration>
            </plugin>
        </plugins>
    </build>

    <dependencies>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.12</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.easymock</groupId>
            <artifactId>easymock</artifactId>
            <version>3.4</version>
            <scope>test</scope>
        </dependency>

        <dependency>
            <groupId>org.apache.ant</groupId>
            <artifactId>ant</artifactId>
            <version>1.10.0</version>
        </dependency>
        <dependency>
            <groupId>wsdl4j</groupId>
            <artifactId>wsdl4j</artifactId>
            <version>1.6.2</version>
        </dependency>
        <dependency>
            <groupId>javax.xml</groupId>
            <artifactId>jaxrpc</artifactId>
            <version>1.1</version>
        </dependency>
        <dependency>
            <groupId>org.eclipse.jdt.core.compiler</groupId>
            <artifactId>ecj</artifactId>
            <version>4.6.1</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.glassfish/javax.xml.rpc -->
        <dependency>
            <groupId>org.glassfish</groupId>
            <artifactId>javax.xml.rpc</artifactId>
            <version>3.0.1-b03</version>
        </dependency>

    </dependencies>
</project>

3. 删除test/util/TestCookieFilter.java，不然启动报错。

4. 在IDEA中选择File -> New -> Project from Existing Sources...，按照Maven项目新建即可。

5. 选择Run -> Edit Configurations.

Main class：
　　 org.apache.catalina.startup.Bootstrap
VM options:
    -Dcatalina.home=E:apache-tomcat-8.5.41-src -Dcatalina.base=E:apache-tomcat-8.5.41-src -Djava.endorsed.dirs=E:apache-tomcat-8.5.41-src/endorsed -Djava.io.tmpdir=E:apache-tomcat-8.5.41-src/temp -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager -Djava.util.logging.config.file=E:apache-tomcat-8.5.41-src/conf/logging.properties

6. 添加jsp初始化程序，org.apache.catalina.startup.ContextConfig.java 类中添加

context.addServletContainerInitializer(new JasperInitializer(), null);

7. 启动访问即可，org.apache.catalina.startup.Bootstrap.java的main方法为启动入口

8. 将web工程添加到Tomcat中看运行的流程，配置项目就和在 server.xml中配置工程是一样的。在E:apache-tomcat-8.5.41-srcconf下的 server.xml 中的 Host节点添加

<Context docBase="E:/apache-tomcat-8.5.41-src/webapps/ROOT" path="/mytomcat" debug="0"  reloadable="true"/>

9. 启动项目，访问http://localhost:8080/

问题解决

如果启动的时候报以下错误： Error:osgi: [apache-tomcat-8.5.41-src] Invalid value for Bundle-Version, @VERSION@ does not match [0-9]{1,9}(.[0-9]{1,9}(.[0-9]{1,9}(.[0-9A-Za-z_-]+)?)?)?

只需要将@version@改为1.1就可以用了

参考文章：https://blog.csdn.net/z583773315/article/details/56353311

参考文章：https://juejin.im/post/5b7cd3336fb9a019c112619d