com.baomidou.mybatisplus.core.toolkit

类 IOUtils

java.lang.Object

com.baomidou.mybatisplus.core.toolkit.IOUtils

public class IOUtils
extends java.lang.Object

IOUtils Copy org.apache.commons.io.IOUtils

从以下版本开始:

2016-11-23

作者:

Caratacus

方法概要

限定符和类型	方法和说明
static void	close(java.net.URLConnection conn) Closes a URLConnection.
static void	closeQuietly(java.io.Closeable... closeables) Closes a Closeable unconditionally.
static void	closeQuietly(java.io.Closeable closeable) Closes a Closeable unconditionally.
static void	closeQuietly(java.sql.Connection conn) Closes a Connection unconditionally.
static void	closeQuietly(java.io.InputStream input) Closes an InputStream unconditionally.
static void	closeQuietly(java.io.OutputStream output) Closes an OutputStream unconditionally.
static void	closeQuietly(java.io.Reader input) Closes an Reader unconditionally.
static void	closeQuietly(java.sql.ResultSet resultSet) Closes a AutoCloseable unconditionally.
static void	closeQuietly(java.nio.channels.Selector selector) Closes a Selector unconditionally.
static void	closeQuietly(java.net.ServerSocket sock) Closes a ServerSocket unconditionally.
static void	closeQuietly(java.net.Socket sock) Closes a Socket unconditionally.
static void	closeQuietly(java.sql.Statement... statements) Closes a AutoCloseable unconditionally.
static void	closeQuietly(java.sql.Statement statement) Closes a AutoCloseable unconditionally.
static void	closeQuietly(java.io.Writer output) Closes an Writer unconditionally.

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

方法详细资料

close

public static void close(java.net.URLConnection conn)

Closes a URLConnection.

参数:

conn - the connection to close.

从以下版本开始:

2.4

closeQuietly

public static void closeQuietly(java.io.Reader input)

Closes an Reader unconditionally.

Equivalent to Reader.close(), except any exceptions will be ignored. This is typically used in finally blocks.

Example code:

 char[] data = new char[1024];
 Reader in = null;
 try {
        in = new FileReader("foo.txt");
        in.read(data);
        in.close(); // close errors are handled
 } catch (Exception e) {
        // error handling
 } finally {
        IOUtils.closeQuietly(in);
 }
 

参数:

input - the Reader to close, may be null or already closed

closeQuietly

public static void closeQuietly(java.io.Writer output)

Closes an Writer unconditionally.

Equivalent to Writer.close(), except any exceptions will be ignored. This is typically used in finally blocks.

Example code:

 Writer out = null;
 try {
        out = new StringWriter();
        out.write("Hello World");
        out.close(); // close errors are handled
 } catch (Exception e) {
        // error handling
 } finally {
        IOUtils.closeQuietly(out);
 }
 

参数:

output - the Writer to close, may be null or already closed

closeQuietly

public static void closeQuietly(java.io.InputStream input)

Closes an InputStream unconditionally.

Equivalent to InputStream.close(), except any exceptions will be ignored. This is typically used in finally blocks.

Example code:

 byte[] data = new byte[1024];
 InputStream in = null;
 try {
        in = new FileInputStream("foo.txt");
        in.read(data);
        in.close(); // close errors are handled
 } catch (Exception e) {
        // error handling
 } finally {
        IOUtils.closeQuietly(in);
 }
 

参数:

input - the InputStream to close, may be null or already closed

closeQuietly

public static void closeQuietly(java.io.OutputStream output)

Closes an OutputStream unconditionally.

Equivalent to OutputStream.close(), except any exceptions will be ignored. This is typically used in finally blocks.

Example code:

 byte[] data = "Hello, World".getBytes();

 OutputStream out = null;
 try {
        out = new FileOutputStream("foo.txt");
        out.write(data);
        out.close(); // close errors are handled
 } catch (IOException e) {
        // error handling
 } finally {
        IOUtils.closeQuietly(out);
 }
 

参数:

output - the OutputStream to close, may be null or already closed

closeQuietly

public static void closeQuietly(java.io.Closeable closeable)

Closes a Closeable unconditionally.

Equivalent to Closeable.close(), except any exceptions will be ignored. This is typically used in finally blocks.

Example code:

 Closeable closeable = null;
 try {
        closeable = new FileReader("foo.txt");
        // process closeable
        closeable.close();
 } catch (Exception e) {
        // error handling
 } finally {
        IOUtils.closeQuietly(closeable);
 }
 

Closing all streams:

 try {
        return IOUtils.copy(inputStream, outputStream);
 } finally {
        IOUtils.closeQuietly(inputStream);
        IOUtils.closeQuietly(outputStream);
 }
 

参数:

closeable - the objects to close, may be null or already closed

从以下版本开始:

2.0

closeQuietly

public static void closeQuietly(java.io.Closeable... closeables)

Closes a Closeable unconditionally.

Equivalent to Closeable.close(), except any exceptions will be ignored.

This is typically used in finally blocks to ensure that the closeable is closed even if an Exception was thrown before the normal close statement was reached.
It should not be used to replace the close statement(s) which should be present for the non-exceptional case.
It is only intended to simplify tidying up where normal processing has already failed and reporting close failure as well is not necessary or useful.

Example code:

 Closeable closeable = null;
 try {
     closeable = new FileReader("foo.txt");
     // processing using the closeable; may throw an Exception
     closeable.close(); // Normal close - exceptions not ignored
 } catch (Exception e) {
     // error handling
 } finally {
     IOUtils.closeQuietly(closeable); // In case normal close was skipped due to Exception
 }
 

Closing all streams:

 try {
        return IOUtils.copy(inputStream, outputStream);
 } finally {
        IOUtils.closeQuietly(inputStream, outputStream);
 }
 

参数:

closeables - the objects to close, may be null or already closed

从以下版本开始:

2.5

另请参阅:

closeQuietly(Closeable)

closeQuietly

public static void closeQuietly(java.net.Socket sock)

Closes a Socket unconditionally.

Equivalent to Socket.close(), except any exceptions will be ignored. This is typically used in finally blocks.

Example code:

 Socket socket = null;
 try {
        socket = new Socket("https://www.foo.com/", 443);
        // process socket
        socket.close();
 } catch (Exception e) {
        // error handling
 } finally {
        IOUtils.closeQuietly(socket);
 }
 

参数:

sock - the Socket to close, may be null or already closed

从以下版本开始:

2.0

closeQuietly

public static void closeQuietly(java.nio.channels.Selector selector)

Closes a Selector unconditionally.

Equivalent to Selector.close(), except any exceptions will be ignored. This is typically used in finally blocks.

Example code:

 Selector selector = null;
 try {
        selector = Selector.open();
        // process socket

 } catch (Exception e) {
        // error handling
 } finally {
        IOUtils.closeQuietly(selector);
 }
 

参数:

selector - the Selector to close, may be null or already closed

从以下版本开始:

2.2

closeQuietly

public static void closeQuietly(java.net.ServerSocket sock)

Closes a ServerSocket unconditionally.

Equivalent to ServerSocket.close(), except any exceptions will be ignored. This is typically used in finally blocks.

Example code:

 ServerSocket socket = null;
 try {
        socket = new ServerSocket();
        // process socket
        socket.close();
 } catch (Exception e) {
        // error handling
 } finally {
        IOUtils.closeQuietly(socket);
 }
 

参数:

sock - the ServerSocket to close, may be null or already closed

从以下版本开始:

2.2

closeQuietly

public static void closeQuietly(java.sql.Connection conn)

Closes a Connection unconditionally.

Equivalent to Connection.close(), except any exceptions will be ignored. This is typically used in finally blocks.

Example code:

 Connection conn = null;
 try {
        conn = new Connection();
        // process close
        conn.close();
 } catch (Exception e) {
        // error handling
 } finally {
        IOUtils.closeQuietly(conn);
 }
 

参数:

conn - the Connection to close, may be null or already closed

从以下版本开始:

2.2

closeQuietly

public static void closeQuietly(java.sql.ResultSet resultSet)

Closes a AutoCloseable unconditionally.

Equivalent to ResultSet.close(), except any exceptions will be ignored. This is typically used in finally blocks.

Example code:

 AutoCloseable statement = null;
 try {
        statement = new Connection();
        // process close
        statement.close();
 } catch (Exception e) {
        // error handling
 } finally {
        IOUtils.closeQuietly(conn);
 }
 

参数:

resultSet - the Connection to close, may be null or already closed

从以下版本开始:

2.2

closeQuietly

public static void closeQuietly(java.sql.Statement statement)

Closes a AutoCloseable unconditionally.

Equivalent to Statement.close(), except any exceptions will be ignored. This is typically used in finally blocks.

Example code:

 AutoCloseable statement = null;
 try {
        statement = new Connection();
        // process close
        statement.close();
 } catch (Exception e) {
        // error handling
 } finally {
        IOUtils.closeQuietly(conn);
 }
 

参数:

statement - the Connection to close, may be null or already closed

从以下版本开始:

2.2

closeQuietly

public static void closeQuietly(java.sql.Statement... statements)

Closes a AutoCloseable unconditionally.

Equivalent to AutoCloseable.close(), except any exceptions will be ignored.

This is typically used in finally blocks to ensure that the closeable is closed even if an Exception was thrown before the normal close statement was reached.
It should not be used to replace the close statement(s) which should be present for the non-exceptional case.
It is only intended to simplify tidying up where normal processing has already failed and reporting close failure as well is not necessary or useful.

Example code:

 AutoCloseable closeable = null;
 try {
     closeable = new AutoCloseable();
     // processing using the closeable; may throw an Exception
     closeable.close(); // Normal close - exceptions not ignored
 } catch (Exception e) {
     // error handling
 } finally {
     IOUtils.closeQuietly(closeable); // In case normal close was skipped due to Exception
 }
 

Closing all streams:

参数:

statements - the objects to close, may be null or already closed

从以下版本开始:

2.5

另请参阅:

closeQuietly(Statement)