右击我的电脑->属性->高级->环境变量->新建
JAVA_HOME your_java_install_path(C:\jdk1.3)
J2EE_HOME your_j2ee_install_path(C:\j2ee)
CLASSPATH %JAVA_HOME%\LIB\TOOLS.JAR;%J2EE_HOME%\LIB\J2EE.JAR
JAVA_HOME your_java_install_path(C:\jdk1.3)
J2EE_HOME your_j2ee_install_path(C:\j2ee)
CLASSPATH %JAVA_HOME%\LIB\TOOLS.JAR;%J2EE_HOME%\LIB\J2EE.JAR
PATH %JAVA_HOME%\BIN;也加上好。