这个命令怎么样：

# which jar file you need analyzing
export JAR_FILE="...";
# export CLASSPATH environment for compiling purpose
export CLASSPATH="...";

javac -verbose *.java 2>&1 \
     | grep -E "^\[loading" \
     | grep $JAR_FILE \
     | grep -Eo "\((.*?)\)";

示例

编译Main.java：

public class Main {
   public static void main(String[] args) {
      org.joda.time.DateTime dateTime = new org.joda.time.DateTime();
   }
}

命令如下：

export JAR_FILE="joda-time-2.9.9.jar";
export CLASSPATH="joda-time-2.9.9.jar";
javac -verbose *.java 2>&1 \
     | grep -E "^\[loading" \
     | grep $JAR_FILE \
     | grep -Eo "\((.*?)\)";

将只输出在joda.jar中使用的类：
(org/joda/time/DateTime.class）