Tomcat源码阅读系列（一）使用IntelliJ IDEA运行Tomcat6源码

       本文是Tomcat源码阅读系列的第一篇文章，该系列文章更多的是参考了网络上其他博主的博客和《How tomcat works》这本书。本文作为开篇，将描述一下，如何将Tomcat源码在Idea环境中运行起来。

1. 下载Tomcat6源码

       到http://tomcat.apache.org/download-60.cgi处下载源码，如下图。

2. 创建聚合模块pom.xml

        需要通过Maven组织文件，因此需要在apache-tomcat-6.0.44-src根目录下创建pom.xml文件，如下，

    4.0.0
    org.apache.tomcat
    Tomcat6.0
    Tomcat6.0
    6.0

    
        Tomcat6.0
        java
        test
        
            
                java
            
        
        
            
                test
            
        
        
            
                org.apache.maven.plugins
                maven-compiler-plugin
                2.0.2

                
                    UTF-8
                    1.6
                    1.6
                
            
        
    

    
        
            junit
            junit
            4.5
            test
        
        
            ant
            ant
            1.7.0
        
        
            wsdl4j
            wsdl4j
            1.6.2
        
        
            javax.xml
            jaxrpc
            1.1
        
        
            org.eclipse.jdt.core.compiler
            ecj
            4.2.2
        
    

如下：

3. 创建项目根目录的pom.xml

1. 创建apache-tomcat-6.0.44-study文件夹
2. 将包含pom.xml文件的apache-tomcat-6.0.44-src文件夹复制到apache-tomcat-6.0.44-study文件夹下
3. apache-tomcat-6.0.44-study文件夹下创建catalina-home文件家
   
4. 将D:\javaee_workspace\apache-tomcat-6.0.44-study\apache-tomcat-6.0.44-src\conf复制到D:\javaee_workspace\apache-tomcat-6.0.44-study\catalina-home\conf文件夹下
   
5. 在apache-tomcat-6.0.44-study文件夹下创建pom.xml文件，内容如下：

    4.0.0
    com.yang
    apache-tomcat-study
    Tomcat 6.0 Study
    1.0
    pom

    
        apache-tomcat-6.0.44-src
    

整体架构如下：

4. 使用Idea打开apache-tomcat-6.0.44-study项目

1. 标记java文件夹为source root
   
   

2. 设置Main class为：org.apache.catalina.startup.Bootstrap
3. 设置VM options为：

-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

如图：

        在Bootstrap的main方法当中加入测试代码：

 System.out.println("======================Tomcat Study======================");

启动项目打印

======================Tomcat Study======================
2015-6-15 21:16:55 org.apache.catalina.startup.ClassLoaderFactory validateFile
警告: Problem with directory [D:\javaee_workspace\apache-tomcat-6.0.44-study\catalina-home\lib], exists: [false], isDirectory: [false], canRead: [false]
2015-6-15 21:16:55 org.apache.catalina.startup.ClassLoaderFactory validateFile
警告: Problem with directory [D:\javaee_workspace\apache-tomcat-6.0.44-study\catalina-home\lib], exists: [false], isDirectory: [false], canRead: [false]
2015-6-15 21:16:55 org.apache.catalina.startup.ClassLoaderFactory validateFile
警告: Problem with directory [D:\javaee_workspace\apache-tomcat-6.0.44-study\catalina-home\lib], exists: [false], isDirectory: [false], canRead: [false]
2015-6-15 21:16:55 org.apache.catalina.startup.ClassLoaderFactory validateFile
警告: Problem with directory [D:\javaee_workspace\apache-tomcat-6.0.44-study\catalina-home\lib], exists: [false], isDirectory: [false], canRead: [false]
2015-6-15 21:16:55 org.apache.catalina.startup.Embedded initDirs
严重: Cannot find specified temporary folder at catalina-home/temp
2015-6-15 21:16:55 org.apache.catalina.core.AprLifecycleListener init
信息: The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: C:\Program Files (x86)\Java\jdk1.6.0_37\bin;C:\windows\Sun\Java\bin;C:\windows\system32;C:\windows;C:\Program Files (x86)\Common Files\NetSarang;C:\windows\system32;C:\windows;C:\windows\System32\Wbem;C:\windows\System32\WindowsPowerShell\v1.0\;C:\Program Files\Java\jdk1.6.0_45\bin;C:\Program Files\Java\jdk1.6.0_45\jre\bin;C:\Program Files\TortoiseSVN\bin;C:\Program Files\TortoiseSVN\bin;C:\Program Files (x86)\Common Files\lenovo\easyplussdk\bin;.
2015-6-15 21:16:55 org.apache.coyote.http11.Http11Protocol init
信息: Initializing Coyote HTTP/1.1 on http-8080
2015-6-15 21:16:55 org.apache.catalina.startup.Catalina load
信息: Initialization processed in 195 ms
2015-6-15 21:16:55 org.apache.catalina.core.StandardService start
信息: Starting service Catalina
2015-6-15 21:16:55 org.apache.catalina.core.StandardEngine start
信息: Starting Servlet Engine: Apache Tomcat/@VERSION@
2015-6-15 21:16:55 org.apache.coyote.http11.Http11Protocol start
信息: Starting Coyote HTTP/1.1 on http-8080
2015-6-15 21:16:55 org.apache.jk.common.ChannelSocket init
信息: JK: ajp13 listening on /0.0.0.0:8009
2015-6-15 21:16:55 org.apache.jk.server.JkMain start
信息: Jk running ID=0 time=0/8  config=null
2015-6-15 21:16:55 org.apache.catalina.startup.Catalina start
信息: Server startup in 47 ms

Tomcat源码成功运行。

最终代码下载地址