IDEA配置Tomcat源碼
1.下載tomcat源碼壓縮包
https://archive.apache.org/dist/tomcat/tomcat-8/v8.5.47/src/apache-tomcat-8.5.47-src.zip
2.構造目錄
新建一個文件夾tomcat8，將解壓後的源碼包複製進來，並在tomcat8目錄下新建home目錄，將源碼包下的webapps和conf目錄拷貝到home目錄下，並在home目錄下創建lib、work目錄。
3.配置Maven依賴
在tomcat8目錄下創建pom.xml，用於指定module爲Tomcat的源碼目錄，如下所示：
<?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>lic</groupId>
<artifactId>apache-tomcat-8</artifactId>
<name>apache-tomcat-8</name>
<version>1.0</version>
<packaging>pom</packaging>
<modules>
<!--源碼文件夾的名稱-->
<module>apache-tomcat-8.5.47-src</module>
</modules>
</project>
之後在apache-tomcat-8.5.47-src目錄下創建pom.xml，用於配置Tomcat源碼額外的依賴，如下所示：
<?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>Tomcat8.5.47</artifactId> <name>Tomcat8.5.47</name> <version>8.5</version> <build> <finalName>Tomcat8.0</finalName> <sourceDirectory>java</sourceDirectory> <resources> <resource> <directory>java</directory> </resource> </resources> <plugins> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-compiler-plugin</artifactId> <version>2.0.2</version> <configuration> <encoding>UTF-8</encoding> <source>1.8</source> <target>1.8</target> </configuration> </plugin> </plugins> </build> <dependencies> <dependency> <groupId>org.easymock</groupId> <artifactId>easymock</artifactId> <version>3.5</version> <scope>test</scope> </dependency> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>4.12</version> <scope>test</scope> </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>4.6.1</version> </dependency> </dependencies> </project>
4.導入Idea，配置編譯環境
其中，Main class：org.apache.catalina.startup.Bootstrap
VM Options：
-Dcatalina.home=home
-Dcatalina.base=home
-Djava.endorsed.dirs=home/endorsed
-Djava.io.tmpdir=home/temp
-Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager
-Djava.util.logging.config.file=home/conf/logging.properties
Working directory：D:/deaSpace/tomcat8
5.其他注意事項
（1）設置Bundle-Versio值爲8
（2）刪除test目錄
（3）在Tomcat8以上啓動org.apache.catalina.startup.Bootstrap時，沒有加載org.apache.jasper.servlet.JasperInitializer，從而無法編譯JSP。所以我們需要在tomcat的源碼org.apache.catalina.startup.ContextConfig中手動將JSP解析器初始化，如下所示：
6.啓動成功
