com.github.xphsc.io.StreamUtil Maven / Gradle / Ivy
package com.github.xphsc.io;
import java.io.Closeable;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.Reader;
import java.io.StringWriter;
import java.io.Writer;
/** 基于流的工具类。
* Created by ${huipei.x} on 2017-6-18
*/
public class StreamUtil {
/**
* 从输入流读取内容, 写入到输出流中. 此方法使用大小为8192字节的默认的缓冲区.
*
* @param in 输入流
* @param out 输出流
*
* @throws IOException 输入输出异常
*/
public static void io(InputStream in, OutputStream out) throws IOException {
io(in, out, -1);
}
/**
* 从输入流读取内容, 写入到输出流中. 使用指定大小的缓冲区.
*
* @param in 输入流
* @param out 输出流
* @param bufferSize 缓冲区大小(字节数)
*
* @throws IOException 输入输出异常
*/
public static void io(InputStream in, OutputStream out, int bufferSize) throws IOException {
if (bufferSize == -1) {
bufferSize = IOConstant.DEFAULT_BUFFER_SIZE;
}
byte[] buffer = new byte[bufferSize];
int amount;
while ((amount = in.read(buffer)) >= 0) {
out.write(buffer, 0, amount);
}
out.flush();
}
/**
* 从输入流读取内容, 写入到输出流中. 此方法使用大小为8192字符的默认的缓冲区.
*
* @param in 输入流
* @param out 输出流
*
* @throws IOException 输入输出异常
*/
public static void io(Reader in, Writer out) throws IOException {
io(in, out, -1);
}
/**
* 从输入流读取内容, 写入到输出流中. 使用指定大小的缓冲区.
*
* @param in 输入流
* @param out 输出流
* @param bufferSize 缓冲区大小(字符数)
*
* @throws IOException 输入输出异常
*/
public static void io(Reader in, Writer out, int bufferSize) throws IOException {
if (bufferSize == -1) {
bufferSize = IOConstant.DEFAULT_BUFFER_SIZE >> 1;
}
char[] buffer = new char[bufferSize];
int amount;
while ((amount = in.read(buffer)) >= 0) {
out.write(buffer, 0, amount);
}
out.flush();
}
/**
* 从输入流读取内容, 写入到输出流中. 此方法使用大小为8192字节的默认的缓冲区.
*
* @param in 输入流
* @param out 输出流
* @param closeIn 是否关闭输入流
* @param closeOut 是否关闭输出流
* @throws IOException 输入输出异常
*/
public static void io(InputStream in, OutputStream out, boolean closeIn, boolean closeOut) throws IOException {
try {
io(in, out);
} finally {
if (closeIn) {
close(in);
}
if (closeOut) {
close(out);
}
}
}
/**
* 从输入流读取内容, 写入到输出流中. 此方法使用大小为8192字节的默认的缓冲区.
*
* @param in 输入流
* @param out 输出流
* @param closeIn 是否关闭输入流
* @param closeOut 是否关闭输出流
* @throws IOException 输入输出异常
*/
public static void io(Reader in, Writer out, boolean closeIn, boolean closeOut) throws IOException {
try {
io(in, out);
} finally {
if (closeIn) {
close(in);
}
if (closeOut) {
close(out);
}
}
}
/** 从输入流读取内容, 写入到目标文件 */
public static void io(InputStream in, File dest) throws IOException {
OutputStream out = new FileOutputStream(dest);
io(in, out);
}
/** 从输入流读取内容, 写入到目标文件 */
public static void io(InputStream in, File dest, boolean closeIn, boolean closeOut) throws IOException {
OutputStream out = new FileOutputStream(dest);
try {
io(in, out);
} finally {
if (closeIn) {
close(in);
}
if (closeOut) {
close(out);
}
}
}
/** 从输入流读取内容, 写入到目标文件 */
public static void io(InputStream in, String dest) throws IOException {
OutputStream out = new FileOutputStream(dest);
io(in, out);
}
/** 从输入流读取内容, 写入到目标文件 */
public static void io(InputStream in, String dest, boolean closeIn, boolean closeOut) throws IOException {
OutputStream out = new FileOutputStream(dest);
try {
io(in, out);
} finally {
if (closeIn) {
close(in);
}
if (closeOut) {
close(out);
}
}
}
/** 从输入流读取内容, 写入到目标文件 */
public static void io(Reader in, File dest) throws IOException {
Writer out = new FileWriter(dest);
io(in, out);
}
/** 从输入流读取内容, 写入到目标文件 */
public static void io(Reader in, File dest, boolean closeIn, boolean closeOut) throws IOException {
Writer out = new FileWriter(dest);
try {
io(in, out);
} finally {
if (closeIn) {
close(in);
}
if (closeOut) {
close(out);
}
}
}
/** 从输入流读取内容, 写入到目标文件 */
public static void io(Reader in, String dest) throws IOException {
Writer out = new FileWriter(dest);
io(in, out);
}
/** 从输入流读取内容, 写入到目标文件 */
public static void io(Reader in, String dest, boolean closeIn, boolean closeOut) throws IOException {
Writer out = new FileWriter(dest);
try {
io(in, out);
} finally {
if (closeIn) {
close(in);
}
if (closeOut) {
close(out);
}
}
}
/**
* 取得同步化的输出流.
*
* @param out 要包裹的输出流
*
* @return 线程安全的同步化输出流
*/
public static OutputStream synchronizedOutputStream(OutputStream out) {
return new SynchronizedOutputStream(out);
}
/**
* 取得同步化的输出流.
*
* @param out 要包裹的输出流
* @param lock 同步锁
*
* @return 线程安全的同步化输出流
*/
public static OutputStream synchronizedOutputStream(OutputStream out, Object lock) {
return new SynchronizedOutputStream(out, lock);
}
/**
* 将指定输入流的所有文本全部读出到一个字符串中.
*
* @param in 要读取的输入流
*
* @return 从输入流中取得的文本
*
* @throws IOException 输入输出异常
*/
public static String readText(InputStream in) throws IOException {
return readText(in, null, -1);
}
/**
* 将指定输入流的所有文本全部读出到一个字符串中.
*
* @param in 要读取的输入流
* @param encoding 文本编码方式
*
* @return 从输入流中取得的文本
*
* @throws IOException 输入输出异常
*/
public static String readText(InputStream in, String encoding) throws IOException {
return readText(in, encoding, -1);
}
/**
* 将指定输入流的所有文本全部读出到一个字符串中.
*
* @param in 要读取的输入流
* @param charset 文本编码方式
* @param bufferSize 缓冲区大小(字符数)
*
* @return 从输入流中取得的文本
*
* @throws IOException 输入输出异常
*/
public static String readText(InputStream in, String charset, int bufferSize) throws IOException {
Reader reader = (charset == null) ? new InputStreamReader(in) : new InputStreamReader(in, charset);
return readText(reader, bufferSize);
}
/**
* 将指定输入流的所有文本全部读出到一个字符串中.
*
* @param in 要读取的输入流
* @param charset 文本编码方式
* @param closeIn 是否关闭输入流
* @return 从输入流中取得的文本
* @throws IOException 输入输出异常
*/
public static String readText(InputStream in, String charset, boolean closeIn) throws IOException {
Reader reader = charset == null ? new InputStreamReader(in) : new InputStreamReader(in, charset);
return readText(reader, closeIn);
}
/**
* 将指定输入流的所有文本全部读出到一个字符串中.
*
* @param in 要读取的输入流
* @param closeIn 是否关闭输入流
* @return 从输入流中取得的文本
* @throws IOException 输入输出异常
*/
public static String readText(Reader in, boolean closeIn) throws IOException {
StringWriter out = new StringWriter();
io(in, out, closeIn, true);
return out.toString();
}
/**
* 将指定Reader的所有文本全部读出到一个字符串中.
*
* @param reader 要读取的Reader
*
* @return 从Reader中取得的文本
*
* @throws IOException 输入输出异常
*/
public static String readText(Reader reader) throws IOException {
return readText(reader, -1);
}
/**
* 将指定Reader的所有文本全部读出到一个字符串中.
*
* @param reader 要读取的Reader
* @param bufferSize 缓冲区的大小(字符数)
*
* @return 从Reader中取得的文本
*
* @throws IOException 输入输出异常
*/
public static String readText(Reader reader, int bufferSize) throws IOException {
StringWriter writer = new StringWriter();
io(reader, writer, bufferSize);
return writer.toString();
}
/**
* 将指定InputStream的所有内容全部读出到一个byte数组中。
*
* @param in 要读取的InputStream
* @return ByteArray # @see ByteArray
* @throws IOException
*/
public static byte[] readBytes(InputStream in) throws IOException {
ByteArrayOutputStream out = new ByteArrayOutputStream();
io(in, out);
return out.toByteArray();
}
/** 将指定InputStream的所有内容全部读出到一个byte数组中。 */
public static byte[] readBytes(InputStream in, boolean closeIn) throws IOException {
ByteArrayOutputStream out = new ByteArrayOutputStream();
io(in, out, closeIn, true);
return out.toByteArray();
}
/**
* 将指定File的所有内容全部读出到一个byte数组中。
*
* @param file 要读取的文件
* @return ByteArray # @see ByteArray
* @throws IOException
*/
public static byte[] readBytes(File file) throws IOException {
ByteArrayOutputStream out = new ByteArrayOutputStream();
io(new FileInputStream(file), out);
return out.toByteArray();
}
/** 将指定File的所有内容全部读出到一个byte数组中。 */
public static byte[] readBytes(File file, boolean closeIn) throws IOException {
ByteArrayOutputStream out = new ByteArrayOutputStream();
io(new FileInputStream(file), out, closeIn, true);
return out.toByteArray();
}
/**
* 通过快速缓冲将指定InputStream的所有内容全部读出到一个byte数组中。
*
* @param in 要读取的InputStream
* @return byte[]字节数组
* @throws IOException
*/
public static byte[] readBytesByFast(InputStream in) throws IOException {
ByteArrayOutputStream out = new ByteArrayOutputStream();
io(in, out);
return out.toByteArray();
}
/** 通过快速缓冲将指定InputStream的所有内容全部读出到一个byte数组中。 */
public static byte[] readBytesByFast(InputStream in, boolean closeIn) throws IOException {
ByteArrayOutputStream out = new ByteArrayOutputStream();
io(in, out, closeIn, true);
return out.toByteArray();
}
/** 将字符串写入到指定输出流中。 */
public static void writeText(CharSequence chars, OutputStream out, String charset, boolean closeOut)
throws IOException {
Writer writer = charset == null ? new OutputStreamWriter(out) : new OutputStreamWriter(out, charset);
writeText(chars, writer, closeOut);
}
/** 将字符串写入到指定Writer中。 */
public static void writeText(CharSequence chars, Writer out, boolean closeOut) throws IOException {
try {
out.write(chars.toString());
out.flush();
} finally {
if (closeOut) {
try {
out.close();
} catch (IOException e) {
// ignore
}
}
}
}
/** 将byte数组写入到指定filePath中。 */
public static void writeBytes(byte[] bytes, String filePath, boolean closeOut) throws IOException {
writeBytes(new ByteArray(bytes), new FileOutputStream(filePath), closeOut);
}
/** 将byte数组写入到指定File中。 */
public static void writeBytes(byte[] bytes, File file, boolean closeOut) throws IOException {
writeBytes(new ByteArray(bytes), new FileOutputStream(file), closeOut);
}
/** 将byte数组写入到指定OutputStream中。 */
public static void writeBytes(byte[] bytes, OutputStream out, boolean closeOut) throws IOException {
writeBytes(new ByteArray(bytes), out, closeOut);
}
/** 将byte数组写入到指定OutputStream中。 */
public static void writeBytes(ByteArray bytes, OutputStream out, boolean closeOut) throws IOException {
try {
out.write(bytes.getRawBytes(), bytes.getOffset(), bytes.getLength());
out.flush();
} finally {
if (closeOut) {
try {
out.close();
} catch (IOException e) {
}
}
}
}
/**
* 关闭流
*
* @param closed 可关闭的流
*/
public static void close(Closeable closed) {
if (closed != null) {
try {
closed.close();
} catch (IOException ignore) {
// can ignore
}
}
}
/**
* 同步化的输出流包裹器.
*/
private static class SynchronizedOutputStream extends OutputStream {
private OutputStream out;
private Object lock;
SynchronizedOutputStream(OutputStream out) {
this(out, out);
}
SynchronizedOutputStream(OutputStream out, Object lock) {
this.out = out;
this.lock = lock;
}
public void write(int datum) throws IOException {
synchronized (lock) {
out.write(datum);
}
}
public void write(byte[] data) throws IOException {
synchronized (lock) {
out.write(data);
}
}
public void write(byte[] data, int offset, int length) throws IOException {
synchronized (lock) {
out.write(data, offset, length);
}
}
public void flush() throws IOException {
synchronized (lock) {
out.flush();
}
}
public void close() throws IOException {
synchronized (lock) {
out.close();
}
}
}
}
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