Neither the JAVA_HOME nor the JRE_HOME environment variable is defined At least

error:

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