org.nlpcn.commons.lang.util

Class IOUtil

java.lang.Object

org.nlpcn.commons.lang.util.IOUtil

public class IOUtil
extends Object

java 一个简单的io操作

Author:

ansj

Field Summary

Fields

Modifier and Type	Field and Description
static String	GBK
static String	LINE
static byte[]	LINEBYTE
static byte[]	TABBYTE
static String	TABLE
static String	UTF8

Constructor Summary

Constructors

Constructor and Description
IOUtil()

Method Summary

Modifier and Type	Method and Description
static void	close(InputStream is) 关闭字节流
static void	close(OutputStream os) 关闭字节流
static void	close(Reader reader) 关闭字符流
static String	getContent(BufferedReader reader)
static String	getContent(File file, String charEncoding) 从文件中读取正文内容
static String	getContent(InputStream is, String charEncoding) 从流中读取正文内容
static String	getContent(String path, String charEncoding) 读取文件获得正文
static InputStream	getInputStream(String path)
static RandomAccessFile	getRandomAccessFile(String path, String charEncoding)
static BufferedReader	getReader(File file, String charEncoding)
static BufferedReader	getReader(InputStream inputStream, String charEncoding) 将输入流转化为字节流
static BufferedReader	getReader(String path, String charEncoding)
static FileIterator	instanceFileIterator(InputStream is, String charEncoding)
static FileIterator	instanceFileIterator(String path, String charEncoding)
static <K,V> HashMap<K,V>	loadMap(InputStream is, String charEncoding, Class<K> key, Class<V> value) 加载一个文件到hashMap
static <K,V> HashMap<K,V>	loadMap(String path, String charEncoding, Class<K> key, Class<V> value) 加载一个文件到hashMap
static List<String>	readFile2List(BufferedReader br) 从一个字符流读取文件到list.
static List<String>	readFile2List(File file, String charEncoding)
static List<String>	readFile2List(InputStream inputStream, String charEncoding)
static List<String>	readFile2List(String path, String charEncoding)
static <T> void	writeList(List<T> list, String path, String charEncoding) 講一個list寫入到文件
static <K,V> void	writeMap(Map<K,V> hm, String path, String charEncoding) 將一個map寫入到文件
static void	Writer(String path, String charEncoding, String content)
static void	WriterObj(String path, Serializable hm) 将一个对象序列化到硬盘中

Methods inherited from class java.lang.Object

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

Field Detail

UTF8

public static final String UTF8

See Also:

Constant Field Values

GBK

public static final String GBK

See Also:

Constant Field Values

TABLE

public static final String TABLE

See Also:

Constant Field Values

LINE

public static final String LINE

See Also:

Constant Field Values

TABBYTE

public static final byte[] TABBYTE

LINEBYTE

public static final byte[] LINEBYTE

Constructor Detail

IOUtil

public IOUtil()

Method Detail

getInputStream

public static InputStream getInputStream(String path)

getReader

public static BufferedReader getReader(String path,
                                       String charEncoding)
                                throws FileNotFoundException,
                                       UnsupportedEncodingException

Throws:

FileNotFoundException

UnsupportedEncodingException

getReader

public static BufferedReader getReader(File file,
                                       String charEncoding)
                                throws FileNotFoundException,
                                       UnsupportedEncodingException

Throws:

FileNotFoundException

UnsupportedEncodingException

getRandomAccessFile

public static RandomAccessFile getRandomAccessFile(String path,
                                                   String charEncoding)
                                            throws FileNotFoundException

Throws:

FileNotFoundException

Writer

public static void Writer(String path,
                          String charEncoding,
                          String content)

getReader

public static BufferedReader getReader(InputStream inputStream,
                                       String charEncoding)
                                throws UnsupportedEncodingException

将输入流转化为字节流

Parameters:

inputStream -

charEncoding -

Returns:

Throws:

UnsupportedEncodingException

getContent

public static String getContent(String path,
                                String charEncoding)

读取文件获得正文

Parameters:

path -

charEncoding -

Returns:

getContent

public static String getContent(InputStream is,
                                String charEncoding)

从流中读取正文内容

Parameters:

is -

charEncoding -

Returns:

getContent

public static String getContent(File file,
                                String charEncoding)

从文件中读取正文内容

Parameters:

file -

charEncoding -

Returns:

getContent

public static String getContent(BufferedReader reader)
                         throws IOException

Parameters:

reader -

Returns:

Throws:

IOException

WriterObj

public static void WriterObj(String path,
                             Serializable hm)
                      throws FileNotFoundException,
                             IOException

将一个对象序列化到硬盘中

Parameters:

string -

hm -

Throws:

IOException

FileNotFoundException

close

public static void close(Reader reader)

关闭字符流

Parameters:

reader -

close

public static void close(InputStream is)

关闭字节流

Parameters:

is -

close

public static void close(OutputStream os)

关闭字节流

Parameters:

is -

instanceFileIterator

public static FileIterator instanceFileIterator(String path,
                                                String charEncoding)

instanceFileIterator

public static FileIterator instanceFileIterator(InputStream is,
                                                String charEncoding)

loadMap

public static <K,V> HashMap<K,V> loadMap(String path,
                                         String charEncoding,
                                         Class<K> key,
                                         Class<V> value)
                                  throws UnsupportedEncodingException

加载一个文件到hashMap

Parameters:

path -

charEncoding -

key -

value -

Returns:

Throws:

UnsupportedEncodingException

loadMap

public static <K,V> HashMap<K,V> loadMap(InputStream is,
                                         String charEncoding,
                                         Class<K> key,
                                         Class<V> value)
                                  throws UnsupportedEncodingException

加载一个文件到hashMap

Parameters:

is -

charEncoding -

key -

value -

Returns:

Throws:

UnsupportedEncodingException

writeMap

public static <K,V> void writeMap(Map<K,V> hm,
                                  String path,
                                  String charEncoding)
                           throws IOException

將一個map寫入到文件

Parameters:

hm -

path -

charEncoding -

Throws:

IOException

writeList

public static <T> void writeList(List<T> list,
                                 String path,
                                 String charEncoding)
                          throws IOException

講一個list寫入到文件

Parameters:

list -

path -

charEncoding -

Throws:

IOException

readFile2List

public static List<String> readFile2List(String path,
                                         String charEncoding)
                                  throws UnsupportedEncodingException,
                                         FileNotFoundException

Throws:

UnsupportedEncodingException

FileNotFoundException

readFile2List

public static List<String> readFile2List(File file,
                                         String charEncoding)
                                  throws FileNotFoundException,
                                         UnsupportedEncodingException

Throws:

FileNotFoundException

UnsupportedEncodingException

readFile2List

public static List<String> readFile2List(InputStream inputStream,
                                         String charEncoding)
                                  throws UnsupportedEncodingException

Throws:

UnsupportedEncodingException

readFile2List

public static List<String> readFile2List(BufferedReader br)

从一个字符流读取文件到list.

Parameters:

br -

Returns:

Throws:

IOException