Closeable释放资源

Posted 2020-12-18 xuchao0506

自jdk 1.5之后就提供了一个Closeable接口，可以方便的帮助我们关闭需要处理的资源，比如说各种 流 数据库连接 socket连接~~~~~之类的

源码：

/**
 * A {@code Closeable} is a source or destination of data that can be closed.
 * The close method is invoked to release resources that the object is
 * holding (such as open files).
 *
 * @since 1.5
 */
public interface Closeable extends AutoCloseable {

    /**
     * Closes this stream and releases any system resources associated
     * with it. If the stream is already closed then invoking this
     * method has no effect.
     *
     * <p> As noted in {@link AutoCloseable#close()}, cases where the
     * close may fail require careful attention. It is strongly advised
     * to relinquish the underlying resources and to internally
     * <em>mark</em> the {@code Closeable} as closed, prior to throwing
     * the {@code IOException}.
     *
     * @throws IOException if an I/O error occurs
     */
    public void close() throws IOException;
}

使用：传入相应的 实例 即可

//代码
close(br, in, reader, out, socket);

private static void close(Closeable... closeables){
    if (closeables != null){
        for (Closeable closeable: closeables){
            try {
                closeable.close();
            } catch (IOException e) {
            }
        }
    }
}