java RandomAccessFile随机读取文件内容
public class TestRandom {public static void main(String[] args) throws Exception {typeTextByRandom("data/data1.txt");}public static void typeTextByRandom(String fileName) {RandomAccessFile raf = null;try {raf = new RandomAccessFile(fileName, "r");raf.seek(new Random().nextInt(100)*2);byte[] bytes = new byte[30];while (raf.read(bytes) != -1) {System.out.println(new String(bytes,"gbk"));break;}} catch (IOException e) {e.printStackTrace();} finally {if (raf != null) {try {raf.close();} catch (IOException e1) {}}}}}?注：data1.txt为中文内容即可，文件编码设为gbk，即将文件打开，另存为保存时，在编码一栏选择ANSI编码。