一、阅读说明
1 术语说明
1.1 下述内容使用“服务器”均代表Tomcat 7.0.75Web服务器。
1.2 下述内容使用%SERVER_PATH%表示服务器根目录
二、startup.bat文件源码
1 startup.bat文件位置
startup.bat文件位置：%SERVER_PATH%instartup.bat
2 源码内容
（以下内容经处理，去除不必要的信息）
1 @echo off 2 3 rem --------------------------------------------------------------------------- 4 rem Start script for the CATALINA Server 5 rem --------------------------------------------------------------------------- 6 7 setlocal 8 9 rem Guess CATALINA_HOME if not defined 10 set "CURRENT_DIR=%cd%" 11 if not "%CATALINA_HOME%" == "" goto gotHome 12 set "CATALINA_HOME=%CURRENT_DIR%" 13 if exist "%CATALINA_HOME%incatalina.bat" goto okHome 14 cd .. 15 set "CATALINA_HOME=%cd%" 16 cd "%CURRENT_DIR%" 17 :gotHome 18 if exist "%CATALINA_HOME%incatalina.bat" goto okHome 19 echo The CATALINA_HOME environment variable is not defined correctly 20 echo This environment variable is needed to run this program 21 goto end 22 :okHome 23 24 set "EXECUTABLE=%CATALINA_HOME%incatalina.bat" 25 26 rem Check that target executable exists 27 if exist "%EXECUTABLE%" goto okExec 28 echo Cannot find "%EXECUTABLE%" 29 echo This file is needed to run this program 30 goto end 31 :okExec 32 33 rem Get remaining unshifted command line arguments and save them in the 34 set CMD_LINE_ARGS= 35 :setArgs 36 if ""%1""=="""" goto doneSetArgs 37 set CMD_LINE_ARGS=%CMD_LINE_ARGS% %1 38 shift 39 goto setArgs 40 :doneSetArgs 41 42 call "%EXECUTABLE%" start %CMD_LINE_ARGS% 43 44 :end
三、源码分析
1 @echo off 2 setlocal 3 set "CURRENT_DIR=%cd%" 4 rem 将当前文件位置赋值给CURRENT_DIR变量 5 if not "%CATALINA_HOME%" == "" goto gotHome 6 rem 如果变量CATALINA_HOME不为空，跳转至gotHome 7 8 set "CATALINA_HOME=%CURRENT_DIR%" 9 rem 如果变量CATALINA_HOME不存在，将当前文件目录赋值给CATALINA_HOME 10 if exist "%CATALINA_HOME%incatalina.bat" goto okHome 11 rem 如果存在%CATALINA_HOME%incatalina.bat文件，跳转至okHome 12 cd .. 13 rem 返回目录上一级 14 set "CATALINA_HOME=%cd%" 15 rem 设置变量CATALINA_HOME为当前目录 16 cd "%CURRENT_DIR%" 17 rem 返回文件所在目录 18 :gotHome 19 if exist "%CATALINA_HOME%incatalina.bat" goto okHome 20 rem 如果存在%CATALINA_HOME%incatalina.bat，则跳转至okHome 21 echo The CATALINA_HOME environment variable is not defined correctly 22 echo This environment variable is needed to run this program 23 goto end 24 :okHome 25 26 set "EXECUTABLE=%CATALINA_HOME%incatalina.bat" 27 rem 设置变量EXECUTABLE为%CATALINA_HOME%incatalina.bat 28 rem Check that target executable exists 29 if exist "%EXECUTABLE%" goto okExec 30 rem 如果存在文件%EXECUTABLE%，则跳转至okExec 31 echo Cannot find "%EXECUTABLE%" 32 echo This file is needed to run this program 33 goto end 34 :okExec 35 36 rem Get remaining unshifted command line arguments and save them in the 37 set CMD_LINE_ARGS= 38 :setArgs 39 if ""%1""=="""" goto doneSetArgs 40 set CMD_LINE_ARGS=%CMD_LINE_ARGS% %1 41 shift 42 rem 将参数向左移位 43 goto setArgs 44 :doneSetArgs 45 46 call "%EXECUTABLE%" start %CMD_LINE_ARGS% 47 rem 调用%CATALINA_HOME%incatalina.bat文件并传递参数 48 49 :end
四、结论
服务器startup.bat主要做了以下几件事情：
1、检查环境
2、设置变量
startup.bat设置变量CATALINA_HOME供catalina.bat使用
3、准备参数
4、调用catalina.bat
传递参数格式：[start %CMD_LINE_ARGS%]
版权声明：本文原创发表于 博客园，作者为 微小处存bug 本文欢迎转载，但未经作者同意必须保留此段声明，且在文章页面明显位置给出原文连接，否则视为侵权。
感谢您的阅读，若您觉得本文对您有所帮助，请点击右下角的推荐按钮。
若您想支持作者，详见下方二维码：
