1 @echo off 2 rem Licensed to the Apache Software Foundation (ASF) under one or more 3 rem contributor license agreements.  See the NOTICE file distributed with 4 rem this work for additional information regarding copyright ownership. 5 rem The ASF licenses this file to You under the Apache License, Version 2.0 6 rem (the "License"); you may not use this file except in compliance with 7 rem the License.  You may obtain a copy of the License at 8 rem 9 rem     http://www.apache.org/licenses/LICENSE-2.010 rem11 rem Unless required by applicable law or agreed to in writing, software12 rem distributed under the License is distributed on an "AS IS" BASIS,13 rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.14 rem See the License for the specific language governing permissions and15 rem limitations under the License.16 17 if "%OS%" == "Windows_NT" setlocal18 rem ---------------------------------------------------------------------------19 rem Start script for the CATALINA Server20 rem ---------------------------------------------------------------------------21 22 rem Guess CATALINA_HOME if not defined23 set "CURRENT_DIR=%cd%"24 if not "%CATALINA_HOME%" == "" goto gotHome25 set "CATALINA_HOME=%CURRENT_DIR%"26 if exist "%CATALINA_HOME%\bin\catalina.bat" goto okHome27 cd ..28 set "CATALINA_HOME=%cd%"29 cd "%CURRENT_DIR%"30 :gotHome31 if exist "%CATALINA_HOME%\bin\catalina.bat" goto okHome32 echo The CATALINA_HOME environment variable is not defined correctly33 echo This environment variable is needed to run this program34 goto end35 :okHome36 37 set "EXECUTABLE=%CATALINA_HOME%\bin\catalina.bat"38 39 rem Check that target executable exists40 if exist "%EXECUTABLE%" goto okExec41 echo Cannot find "%EXECUTABLE%"42 echo This file is needed to run this program43 goto end44 :okExec45 46 rem Get remaining unshifted command line arguments and save them in the47 set CMD_LINE_ARGS=48 :setArgs49 if ""%1""=="""" goto doneSetArgs50 set CMD_LINE_ARGS=%CMD_LINE_ARGS% %151 shift52 goto setArgs53 :doneSetArgs54 55 56 call "%EXECUTABLE%" start %CMD_LINE_ARGS%57 58 :end

shift命令    批处理文件中可引用的参数为%0~%9，%0是指批处理文件的本身，也可以说是一个外部命令: %1~%9是批处理参数，也称形参: 而替换形参的实参若超过了批处理文件中所规定数值(9个)且想在批处理文件中应用这些实参的话，shift命令可以帮你实现！它更改批处理文件中可替换参数的位置，shift [/n] n的取值是[0,8],且为整数；[/n]为可选参数，当赋予n某个值时，就意味着命令从第n个参数开始移位；当n赋予的值为0,1或不带有任何命令选项的shift时，则表示批处理文件中替换参数左移一个位置，后面的替换参数陆续填补上去，直至可替换参数为空。