tomca 8.5 idea 编译

1  官网下载 src文件

https://mirrors.tuna.tsinghua.edu.cn/apache/tomcat/tomcat-8/v8.5.54src/apache-tomcat-8.5.54-src.zip

2 解压至指定目录下（我的是tomcat）;

  创建一个catalina-home文件夹，这个文件夹存放着真正运行的tomcat实例;

  将apache-tomcat-8.5.54-src目录下的bin ，conf和webapps文件夹拷贝到实例文件夹中，并新建其他文件夹（创建lib、work、logs和temp文件夹）

 

 

 

 

 

3 新建tomcat目录下pom.xml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>gxf</groupId>    
    <artifactId>apache-tomcat-8</artifactId>    
    <name>apache-tomcat-8-source</name>    
    <version>1.0</version>    
    <packaging>pom</packaging> 
    <modules>    
        <module>apache-tomcat-8.5.54-src</module>    
    </modules>    
</project>

　　

4新建apache-tomcat-8.5.54-src目录下pom.xml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.tomcat</groupId>
<artifactId>Tomcat8.0</artifactId>
<name>Tomcat8.0</name>
<version>8.0</version>

<build>
 <finalName>Tomcat8.0</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>

5 使用idea导入外层pom文件

6配置启动参数

org.apache.catalina.startup.Bootstrap

　　

-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

　　

 

 

 7 删除test文件夹

 8 手动加载jsp
我们直接启动org.apache.catalina.startup.Bootstrap的时候没有加载org.apache.jasper.servlet.JasperInitializer，从而无法编译JSP。这在Tomcat6/7是没有这个问题的。解决办法是在tomcat的源码org.apache.catalina.startup.ContextConfig中手动将JSP解析器初始化。

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

　　

 

 

9 后续就可以启动断点看源代码了，如果有错误根据错误提示修改，注意设置jdk,及java compile的版本

参考：https://blog.csdn.net/qq_35262405/article/details/101780644