idea中以maven工程的方式运行tomcat源码

0. 准备环境 idea+jdk8+tomcat源码

1.下载tomcat源码：

    http://mirrors.tuna.tsinghua.edu.cn/apache/tomcat/tomcat-8/v8.5.46/src/apache-tomcat-8.5.46-src.zip

2. 解压压缩包，在根目录下新建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.apache.tomcat</groupId>
    <artifactId>Tomcat8.5</artifactId>
    <name>Tomcat8.5</name>
    <version>8.5</version>
 
    <build>
        <finalName>Tomcat8.5</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>2.3</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>
        </dependency>
        <dependency>
            <groupId>ant</groupId>
            <artifactId>ant</artifactId>
            <version>1.7.0</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>4.5.1</version>
        </dependency>
       
    </dependencies>
</project>

3. 根目录新建catalina-home文件夹，并将conf和webapps文件夹复制到catalina-home目录中，最终目录结构如下图

4. 配置idea

    4.1 将Main class设置为org.apache.catalina.startup.Bootstrap

    4.2 设置vm启动参数

-Dcatalina.home=catalina-home
-Dcatalina.base=catalina-home
-Djava.endorsed.dirs=catalina-home/endorsed
-Djava.io.tmpdir=catalina-home/temp
-Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager
-Djava.util.logging.config.file=catalina-home/conf/logging.properties

5. 注释util.TestCookieFilter类，类编译报错

6. org.apache.catalina.startup.ContextConfig中的configureStart函数中手动将JSP解析器初始化：

        webConfig();
        //org.apache.catalina.startup.Bootstrap的时候没有加载org.apache.jasper.servlet.JasperInitializer，无法编译jsp，导致访问url出现500，新增下行代码
        context.addServletContainerInitializer(new JasperInitializer(), null);

7. 执行Bootstrap类中main方法，打开浏览器访问localhost:8080，出现熟悉的三脚猫，idea运行tomcat源码完成