我的jdk安装在 /usr/java/j2sdk1.4_2_02
  tomcat 安装在 /usr/local/tomcat
  编辑 /etc/profile文件,加入
#Java Environment

export JAVA_HOME="/usr/java/j2sdk1.4_2_02"

export CATALINA_HOME="/usr/local/tomcat"

CLASS_PATH="./:$JAVA_HOME/bin/dt.jar:$JAVA_HOME/bin/tools.jar"

PATH="$PATH:$JAVA_HOME/bin:$CATALINA_HOME/bin" 

  编辑 .bash_profile 为
# .bash_profile
                                                                                
# Get the aliases and functions
if [ -f ~/.bashrc ]; then
        . ~/.bashrc
fi
                                                                                
# User specific environment and startup programs
                                                                                
PATH=$PATH:$HOME/bin
BASH_ENV=$HOME/.bashrc
USERNAME="root"
                                                                                
export USERNAME BASH_ENV PATH
export JAVA_HOME=/usr/java/j2sdk1.4.2_02
export JAVA_HOME="/usr/java/j2sdk1.4_2_02"
                                                                                
export CATALINA_HOME="/usr/local/tomcat"
                                                                                
CLASS_PATH="./:$JAVA_HOME/bin/dt.jar:$JAVA_HOME/bin/tools.jar"
                                                                                
PATH="$PATH:$JAVA_HOME/bin:$CATALINA_HOME/bin"

  然后在 /usr/local/tomcat/bin 下运行
  ./catalina.sh start

  在终端显示:
  Using CATALINA_BASE:   /usr/local/tomcat
Using CATALINA_HOME:   /usr/local/tomcat
Using CATALINA_TMPDIR: /usr/local/tomcat/temp
Using JAVA_HOME:       /usr/java/j2sdk1.4.2_02
touch: 正在创建目录 ‘/usr/local/tomcat/logs/catalina.out’: 没有那个文件或目录
./catalina.sh: line 231: /usr/local/tomcat/logs/catalina.out: 没有那个文件或目录

  在终端中[root@localhost bin]#java -version 
  显示bash: java: command not found

 请高手给看看我哪里出错了,万分感谢!!!

PATH="$PATH:$JAVA_HOME/bin:$CATALINA_HOME/bin"
这句话要在export PATH之前

PATH没有设置正确