解决Tomcat双击启动文件startup.bat闪退问题（多JDK解决办法）

解决Tomcat双击启动文件startup.bat闪退的问题，可以尝试以下步骤：

1. 检查环境变量配置：确保JAVA_HOME环境变量正确指向了JDK的安装目录，并且PATH变量包含了JDK的bin目录。
2. 检查Tomcat和JDK版本兼容性：如果你的系统安装了多个版本的JDK，确保Tomcat使用的是正确的JDK版本。
3. 使用命令行启动：不要直接双击startup.bat，而是在命令行中执行它，这样可以看到具体的错误信息。
4. 修改startup.bat文件：在startup.bat文件中，找到call "%EXECUTABLE%" start这一行，将start改为run，这样可以避免新窗口的出现，便于观察错误信息。
5. 检查内存设置：如果系统内存不足，Tomcat可能无法启动。在set CATALINA_OPTS行设置合适的JVM内存参数。
6. 查看日志文件：查看catalina.out日志文件，了解具体的错误信息。
7. 以管理员身份运行：尝试以管理员身份运行startup.bat。
8. 重装Tomcat：如果以上步骤都不能解决问题，可以尝试重新下载并安装Tomcat。

示例代码（修改startup.bat）：

@echo off
rem Licensed to the Apache Software Foundation (ASF) under one or more
rem contributor license agreements.  See the NOTICE file distributed with
rem this work for additional information regarding copyright ownership.
rem The ASF licenses this file to You under the Apache License, Version 2.0
rem (the "License"); you may not use this file except in compliance with
rem the License.  You may obtain a copy of the License at
rem
rem     http://www.apache.org/licenses/LICENSE-2.0
rem
rem Unless required by applicable law or agreed to in writing, software
rem distributed under the License is distributed on an "AS IS" BASIS,
rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
rem See the License for the specific language governing permissions and
rem limitations under the License.
 
if "%OS%" == "Windows_NT" setlocal
rem ---------------------------------------------------------------------------
rem Start script for the CATALINA Server
rem
rem $Id: startup.bat 1007685 2010-02-08 18:27:25Z markt $
rem ---------------------------------------------------------------------------
 
...
 
rem Guess CATALINA_HOME if not defined
set "CURRENT_DIR=%cd%"
if not "%CATALINA_HOME%" == "" goto gotHome
set "CATALINA_HOME=%CURRENT_DIR%"
if exist "%CATALINA_HOME%\bin\catalina.bat" goto okHome
cd ..
set "CATALINA_HOME=%cd%"
cd "%CURRENT_DIR%"
:gotHome
if exist "%CATALINA_HOME%\bin\catalina.bat" goto okHome
echo The CATALINA_HOME environment variable is not defined correctly
echo This environment variable is needed to run