find "@" F:/00f.txt > F:/book.txt ------------------
find "abc" F:/00f.txt > F:/book.txt-----------------
某一行含有字符串“abc”,则本行输出到新文件中
find "@" F:/00f.txt > F:/book.txt ------------------
find "abc" F:/00f.txt > F:/book.txt-----------------
某一行含有字符串“abc”,则本行输出到新文件中