weixin_50954940的博客

1.添加maven依赖 <!-- excel --> <dependency> <groupId>org.apache.poi</groupId> <artifactId>poi</artifactId> <version>3.14</version> </dependency>

public void test8() throws Exception { long start = System.currentTimeMillis(); File src = new File("D:\\54.txt"); String last = getFileLast(src); BufferedReader br = new BufferedReader(new FileReader(src)); int lineno =