tomcat启动报Neither the JAVA_HOME nor the JRE_HOME

在linux下启动tomcat不成功，报如下的错误信息： 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 经查看相关资料，了解到是在配置文件中没有设置java的环境变量引起的，解决方法： 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