com.hankcs.hanlp.corpus.io

类 IOUtil

java.lang.Object

com.hankcs.hanlp.corpus.io.IOUtil

public class IOUtil
extends Object

一些常用的IO操作

作者:

hankcs

嵌套类概要

嵌套类

限定符和类型	类和说明
static class	IOUtil.LineIterator 方便读取按行读取大文件

构造器概要

构造器

构造器和说明
IOUtil()

方法概要

限定符和类型	方法和说明
static String	baseName(String path)
static boolean	deleteFile(String path) 删除本地文件
static String	dirname(String path) 获取文件所在目录的路径
static byte[]	getBytes(InputStream is)
static InputStream	getResourceAsStream(String path) class.getResourceAsStream的wrapper，在资源不存在的情况下抛出IOException，
static String	getSuffix(String name, String delimiter) 获取最后一个分隔符的后缀
static boolean	isFileExisted(String path) 判断文件是否存在
static boolean	isResource(String path) 判断资源是否位于jar中
static void	loadDictionary(BufferedReader br, TreeMap<String,CoreDictionary.Attribute> storage) 将一个BufferedReader中的词条加载到词典
static TreeMap<String,CoreDictionary.Attribute>	loadDictionary(String... pathArray) 加载词典，词典必须遵守HanLP核心词典格式
static BufferedReader	newBufferedReader(String path) 创建一个BufferedReader
static BufferedWriter	newBufferedWriter(String path) 创建一个BufferedWriter
static BufferedWriter	newBufferedWriter(String path, boolean append)
static InputStream	newInputStream(String path) 创建输入流（经过IO适配器创建）
static OutputStream	newOutputStream(String path) 创建输出流（经过IO适配器创建）
static byte[]	readBytes(String path) 将整个文件读取为字节数组
static byte[]	readBytesFromOtherInputStream(InputStream is) 将非FileInputStream的某InputStream中的全部数据读入到字节数组中
static int	readBytesFromOtherInputStream(InputStream is, byte[] targetArray) 从InputStream读取指定长度的字节出来
static byte[]	readBytesFromResource(String path) 将资源中的一个资源读入byte数组
static LinkedList<String[]>	readCsv(String path)
static IOUtil.LineIterator	readLine(String path)
static LinkedList<String>	readLineList(String path)
static LinkedList<String>	readLineListWithLessMemory(String path) 用省内存的方式读取大文件
static Object	readObjectFrom(String path) 反序列化对象
static String	readTxt(String path) 一次性读入纯文本
static String	readTxt(String file, String charsetName)
static <T> boolean	saveCollectionToTxt(Collection<T> collection, String path)
static boolean	saveEntrySetToTxt(Set<Map.Entry<Object,Object>> entrySet, String path, String separator)
static boolean	saveMapToTxt(Map<Object,Object> map, String path)
static boolean	saveMapToTxt(Map<Object,Object> map, String path, String separator)
static boolean	saveObjectTo(Object o, String path) 序列化对象
static boolean	saveTxt(String path, String content) 快速保存
static boolean	saveTxt(String path, StringBuilder content)
static void	writeCustomNature(DataOutputStream out, LinkedHashSet<Nature> customNatureCollector)
static void	writeLine(BufferedWriter bw, String... params) 写数组，用制表符分割

从类继承的方法 java.lang.Object

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

构造器详细资料

IOUtil

public IOUtil()

方法详细资料

saveObjectTo

public static boolean saveObjectTo(Object o,
                                   String path)

序列化对象

参数:

o -

path -

返回:

readObjectFrom

public static Object readObjectFrom(String path)

反序列化对象

参数:

path -

返回:

readTxt

public static String readTxt(String path)

一次性读入纯文本

参数:

path -

返回:

readCsv

public static LinkedList<String[]> readCsv(String path)

saveTxt

public static boolean saveTxt(String path,
                              String content)

快速保存

参数:

path -

content -

返回:

saveTxt

public static boolean saveTxt(String path,
                              StringBuilder content)

saveCollectionToTxt

public static <T> boolean saveCollectionToTxt(Collection<T> collection,
                                              String path)

readBytes

public static byte[] readBytes(String path)

将整个文件读取为字节数组

参数:

path -

返回:

readTxt

public static String readTxt(String file,
                             String charsetName)
                      throws IOException

抛出:

IOException

baseName

public static String baseName(String path)

readBytesFromOtherInputStream

public static byte[] readBytesFromOtherInputStream(InputStream is)
                                            throws IOException

将非FileInputStream的某InputStream中的全部数据读入到字节数组中

参数:

is -

返回:

抛出:

IOException

readBytesFromOtherInputStream

public static int readBytesFromOtherInputStream(InputStream is,
                                                byte[] targetArray)
                                         throws IOException

从InputStream读取指定长度的字节出来

参数:

is - 流

targetArray - output

返回:

实际读取了多少字节，返回0表示遇到了文件尾部

抛出:

IOException

readBytesFromResource

public static byte[] readBytesFromResource(String path)
                                    throws IOException

将资源中的一个资源读入byte数组

参数:

path -

返回:

抛出:

IOException

getBytes

public static byte[] getBytes(InputStream is)
                       throws IOException

抛出:

IOException

readLineList

public static LinkedList<String> readLineList(String path)

readLineListWithLessMemory

public static LinkedList<String> readLineListWithLessMemory(String path)

用省内存的方式读取大文件

参数:

path -

返回:

saveMapToTxt

public static boolean saveMapToTxt(Map<Object,Object> map,
                                   String path)

saveMapToTxt

public static boolean saveMapToTxt(Map<Object,Object> map,
                                   String path,
                                   String separator)

saveEntrySetToTxt

public static boolean saveEntrySetToTxt(Set<Map.Entry<Object,Object>> entrySet,
                                        String path,
                                        String separator)

dirname

public static String dirname(String path)

获取文件所在目录的路径

参数:

path -

返回:

readLine

public static IOUtil.LineIterator readLine(String path)

deleteFile

public static boolean deleteFile(String path)

删除本地文件

参数:

path -

返回:

isFileExisted

public static boolean isFileExisted(String path)

判断文件是否存在

参数:

path -

返回:

isResource

public static boolean isResource(String path)

判断资源是否位于jar中

参数:

path -

返回:

newBufferedWriter

public static BufferedWriter newBufferedWriter(String path)
                                        throws IOException

创建一个BufferedWriter

参数:

path -

返回:

抛出:

FileNotFoundException

UnsupportedEncodingException

IOException

newBufferedReader

public static BufferedReader newBufferedReader(String path)
                                        throws IOException

创建一个BufferedReader

参数:

path -

返回:

抛出:

FileNotFoundException

UnsupportedEncodingException

IOException

newBufferedWriter

public static BufferedWriter newBufferedWriter(String path,
                                               boolean append)
                                        throws FileNotFoundException,
                                               UnsupportedEncodingException

抛出:

FileNotFoundException

UnsupportedEncodingException

newInputStream

public static InputStream newInputStream(String path)
                                  throws IOException

创建输入流（经过IO适配器创建）

参数:

path -

返回:

抛出:

IOException

newOutputStream

public static OutputStream newOutputStream(String path)
                                    throws IOException

创建输出流（经过IO适配器创建）

参数:

path -

返回:

抛出:

IOException

getSuffix

public static String getSuffix(String name,
                               String delimiter)

获取最后一个分隔符的后缀

参数:

name -

delimiter -

返回:

writeLine

public static void writeLine(BufferedWriter bw,
                             String... params)
                      throws IOException

写数组，用制表符分割

参数:

bw -

params -

抛出:

IOException

loadDictionary

public static TreeMap<String,CoreDictionary.Attribute> loadDictionary(String... pathArray)
                                                               throws IOException

加载词典，词典必须遵守HanLP核心词典格式

参数:

pathArray - 词典路径，可以有任意个

返回:

一个储存了词条的map

抛出:

IOException - 异常表示加载失败

loadDictionary

public static void loadDictionary(BufferedReader br,
                                  TreeMap<String,CoreDictionary.Attribute> storage)
                           throws IOException

将一个BufferedReader中的词条加载到词典

参数:

br - 源

storage - 储存位置

抛出:

IOException - 异常表示加载失败

writeCustomNature

public static void writeCustomNature(DataOutputStream out,
                                     LinkedHashSet<Nature> customNatureCollector)
                              throws IOException

抛出:

IOException

getResourceAsStream

public static InputStream getResourceAsStream(String path)
                                       throws FileNotFoundException

class.getResourceAsStream的wrapper，在资源不存在的情况下抛出IOException，

参数:

path -

返回:

抛出:

FileNotFoundException