tomcat8源码分析00-源码启动

1.获取源码
源码地址: https://github.com/apache/tomcat

git clone https://github.com/apache/tomcat.git tomcat8
# 克隆源码并切换到8.5.x版本
git checkout 8.5.x

2.项目根目录新建并配置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>cn.xxx</groupId>
  <artifactId>Tomcat8.5.x</artifactId>
  <name>Tomcat8</name>
  <version>8.5.x</version>
  <build>
    <finalName>Tomcat8</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>2.3</version>
        <configuration>
          <encoding>UTF-8</encoding>
          <source>1.8</source>
          <target>1.8</target>
        </configuration>
      </plugin>
    </plugins>
  </build>
  <dependencies>
    <dependency>
      <groupId>org.apache.ant</groupId>
      <artifactId>ant</artifactId>
      <version>1.10.1</version>
    </dependency>
    <dependency>
      <groupId>org.apache.ant</groupId>
      <artifactId>ant-apache-log4j</artifactId>
      <version>1.9.5</version>
    </dependency>
    <dependency>
      <groupId>org.apache.ant</groupId>
      <artifactId>ant-commons-logging</artifactId>
      <version>1.9.5</version>
    </dependency>
    <dependency>
      <groupId>javax.xml.rpc</groupId>
      <artifactId>javax.xml.rpc-api</artifactId>
      <version>1.1</version>
    </dependency>
    <dependency>
      <groupId>wsdl4j</groupId>
      <artifactId>wsdl4j</artifactId>
      <version>1.6.2</version>
    </dependency>
    <dependency>
      <groupId>org.eclipse.jdt.core.compiler</groupId>
      <artifactId>ecj</artifactId>
      <version>4.6.1</version>
    </dependency>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>4.12</version>
      <scope>test</scope>
    </dependency>
    <dependency>
      <groupId>org.easymock</groupId>
      <artifactId>easymock</artifactId>
      <version>3.5.1</version>
      <scope>test</scope>
    </dependency>
    <dependency>
      <groupId>biz.aQute.bnd</groupId>
      <artifactId>biz.aQute.bndlib</artifactId>
      <version>5.2.0</version>
      <scope>provided</scope>
    </dependency>
  </dependencies>
</project>

如果idea没有识别到maven项目需要自己手动link一下。右键pom.xml找到Add as Maven Project

点击maven的clean可能提示找不到jdk，按着提示配置jdk


3.idea设置启动配置

Main class:
org.apache.catalina.startup.Bootstrap
VM options: 
-Dcatalina.home=/Users/username/Desktop/java/tomcat8 -Dcatalina.base=/Users/username/Desktop/java/tomcat8 -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager -Djava.util.logging.config.file=/Users/username/Desktop/java/tomcat8/conf/logging.properties -Dfile.encoding=UTF8 -Duser.language=en -Duser.region=US

4.启动后无法编译jsp文件报错500
找到ContextConfig类，找到代码webConfig();在下一行增加

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