ubuntu 安装java web开发环境
1，jdk 省略sudo apt-get install sun-java6-jdk
2，安装tomcat
sudo apt-get install tomcat6
然后去/etc/init.d/tomcat6去启动和停止
http://localhost:8080测试
把自己的程序部署到/usr/share/tomcat6这个目录下的webapps
3，安装mysql
sudo apt-get install mysql5-server
4，安装jdbc
下载mysql-connector-java-3.1.12.tar.gz包，解压
tar zxvf mysql-connector-java-3.1.12.tar.gz
然后把mysql-connector-java-3.1.12.tar.gz拷贝到/usr/lib/jvm/java-6-sun/lib下面
这些就行了；
比较好的参考帖子
http://www.iteye.com/topic/482739
http://jiessiedyh.iteye.com/blog/430691
http://igoole.iteye.com/blog/326311
http://linux.net527.cn/Ubuntu/Ununtnwangluoguanli/2589.html
http://www.xue5.com/itedu/200707/131828.html
http://phyeas.iteye.com/blog/317830
http://zhoujinxiong.iteye.com/blog/574228
今天在ubuntu上搭建java开发环境，在装tomcat6的后。执行startup.sh脚本的时候，总是报 cannot find catalina.sh
在 baidu上找了半天才发现原来 是没有权限的原因，加一个命令就万事OK了。
chmod +x /opt/apache-tomcat6/bin/*.sh
http://linghongli.iteye.com/blog/615303
引用
错误：
Neither the JAVA_HOME nor the JRE_HOME environment variable is defined
At least one of these environment variable is needed to run this program
先看Tomcat的startup.bat，它调用了catalina.bat,而catalina.bat则调用了 setclasspath.bat。只要在setclasspath.bat的开头声明环境变量，打开tomcat的bin目录下面的 setclasspath.sh，添加红色部分，路径自己修改
#!/bin/sh
# -----------------------------------------------------------------------------
#Set CLASSPATH and Java options
#
#$Id: setclasspath.sh 467182 2006-10-23 23:47:06Z markt $
# -----------------------------------------------------------------------------
export JAVA_HOME=/usr/lib/jvm/java-6-sun
export JRE_HOME=/usr/lib/jvm/java-6-sun/jre
# First clear out the user classpath
CLASSPATH=
# Make sure prerequisite environment variables are set
if [ -z "$JAVA_HOME" -a -z "$JRE_HOME" ]; then
# Bugzilla 37284
if $darwin && [ -d "/System/Library/Frameworks/JavaVM.framework/Versions/1.5/Home" ]; then
export JAVA_HOME="/System/Library/Frameworks/JavaVM.framework/Versions/1.5/Home"
else
echo "Neither the JAVA_HOME nor the JRE_HOME environment variable is defined"
echo "At least one of these environment variable is needed to run this program"
exit 1
fi
fi
if [ -z "$JAVA_HOME" -a "$1" = "debug" ]; then
echo "JAVA_HOME should point to a JDK in order to run in debug mode."
exit 1
fi
if [ -z "$JRE_HOME" ]; then
JRE_HOME="$JAVA_HOME"
fi
# If we're running under jdb, we need a full jdk.
if [ "$1" = "debug" -o "$1" = "javac" ] ; then
if [ "$os400" = "true" ]; then
if [ ! -x "$JAVA_HOME"/bin/java -o ! -x "$JAVA_HOME"/bin/javac ]; then
echo "The JAVA_HOME environment variable is not defined correctly"
echo "This environment variable is needed to run this program"
echo "NB: JAVA_HOME should point to a JDK not a JRE"
exit 1
fi
else
if [ ! -x "$JAVA_HOME"/bin/java -o ! -x "$JAVA_HOME"/bin/jdb -o ! -x "$JAVA_HOME"/bin/javac ]; then
echo "The JAVA_HOME environment variable is not defined correctly"
echo "This environment variable is needed to run this program"
echo "NB: JAVA_HOME should point to a JDK not a JRE"
exit 1
fi
fi
fi
if [ -z "$BASEDIR" ]; then
echo "The BASEDIR environment variable is not defined"
echo "This environment variable is needed to run this program"
exit 1
fi
if [ ! -x "$BASEDIR"/bin/setclasspath.sh ]; then
if $os400; then
# -x will Only work on the os400 if the files are:
# 1. owned by the user
# 2. owned by the PRIMARY group of the user
# this will not work if the user belongs in secondary groups
eval
else
echo "The BASEDIR environment variable is not defined correctly"
echo "This environment variable is needed to run this program"
exit 1
fi
fi
# Set the default -Djava.endorsed.dirs argument
JAVA_ENDORSED_DIRS="$BASEDIR"/endorsed
# Set standard CLASSPATH
if [ "$1" = "debug" -o "$1" = "javac" ] ; then
CLASSPATH="$JAVA_HOME"/lib/tools.jar
fi
# OSX hack to CLASSPATH
JIKESPATH=
if [ `uname -s` = "Darwin" ]; then
OSXHACK="/System/Library/Frameworks/JavaVM.framework/Versions/CurrentJDK/Classes"
if [ -d "$OSXHACK" ]; then
for i in "$OSXHACK"/*.jar; do
JIKESPATH="$JIKESPATH":"$i"
done
fi
fi
# Set standard commands for invoking Java.
_RUNJAVA="$JRE_HOME"/bin/java
if [ "$os400" != "true" ]; then
_RUNJDB="$JAVA_HOME"/bin/jdb
fi
_RUNJAVAC="$JAVA_HOME"/bin/javac
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