使用了try-with-resource语法（JDK1.7及以上），代码更加便捷

Junit测试样例，先写入文件，再读出来：

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = "classpath:spring-config-service-test.xml")
public class FileTest {@Testpublic void testFile() {write();read();}/*** 读*/public void read() {String path = "D:\\file\\myFile.txt";//Java7的try-with-resources可以优雅关闭文件，异常时自动关闭文件；详细解读https://stackoverflow.com/a/12665271try (FileReader reader = new FileReader(path);BufferedReader br = new BufferedReader(reader)) {String line;while ((line = br.readLine()) != null) {// readLine一行一行读System.out.println(line);}} catch (Exception e) {e.printStackTrace();}}/*** 写*/public static void write() {try {File path = new File("D:\\file\\myFile.txt");path.createNewFile();try (FileWriter writer = new FileWriter(path);BufferedWriter out = new BufferedWriter(writer)) {out.write("我写入的内容");out.flush();}} catch (Exception e) {e.printStackTrace();}}
}