找出全部import的类

$ find . -name *.java | xargs grep "^import" | \
    grep -v "java\." | \
    grep -v "org\.omg\." | \
    grep -v "javax\." | \
    awk -F : '{printf "%s - %s\n", substr($2,0,index($2,";")-1),substr($1,3,length($1)-2);}' | \
    awk '{print $2,$3,$4}' | \
    sort >import.txt