com.feilong.io.IOReaderUtil Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of feilong Show documentation
Show all versions of feilong Show documentation
feilong is a suite of core and expanded libraries that include utility classes, http, excel,cvs, io classes, and much much more.
/*
* Copyright (C) 2008 feilong
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.feilong.io;
import static com.feilong.core.CharsetType.UTF8;
import static com.feilong.core.Validator.isNotNullOrEmpty;
import static com.feilong.core.Validator.isNullOrEmpty;
import static com.feilong.core.date.DateUtil.formatDurationUseBeginTimeMillis;
import static com.feilong.core.lang.ObjectUtil.defaultIfNull;
import static com.feilong.core.lang.ObjectUtil.defaultIfNullOrEmpty;
import static com.feilong.core.util.CollectionsUtil.newLinkedHashSet;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.LineNumberReader;
import java.io.Reader;
import java.io.UncheckedIOException;
import java.nio.ByteBuffer;
import java.nio.channels.FileChannel;
import java.nio.charset.Charset;
import java.util.Set;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.feilong.core.CharsetType;
import com.feilong.core.Validate;
import com.feilong.json.JsonUtil;
import com.feilong.lib.io.IOUtils;
import com.feilong.lib.lang3.StringUtils;
import com.feilong.validator.ValidatorUtil;
/**
* focus 在文件读取以及解析.
*
* @author feilong
* @see com.feilong.lib.io.IOUtils
* @since 1.0.6
*/
@SuppressWarnings("squid:S1192") //String literals should not be duplicated
public final class IOReaderUtil{
/** The Constant log. */
private static final Logger LOGGER = LoggerFactory.getLogger(IOReaderUtil.class);
//---------------------------------------------------------------
/** 默认编码. */
private static final String DEFAULT_CHARSET_NAME = UTF8;
//---------------------------------------------------------------
/** Don't let anyone instantiate this class. */
private IOReaderUtil(){
//AssertionError不是必须的. 但它可以避免不小心在类的内部调用构造器. 保证该类在任何情况下都不会被实例化.
//see 《Effective Java》 2nd
throw new AssertionError("No " + getClass().getName() + " instances for you!");
}
//---------------------------------------------------------------
/**
* 获得内容直接转成字节数组.
*
*
* 方法内部已经关闭了相关流
*
*
* @param location
*
* - 支持全路径, 比如. "file:C:/test.dat".
* - 支持classpath 伪路径, e.g. "classpath:test.dat".
* - 支持相对路径, e.g. "WEB-INF/test.dat".
* - 如果上述都找不到,会再次转成FileInputStream,比如 "/Users/feilong/feilong-io/src/test/resources/readFileToString.txt"
*
* @return 如果 location 是null,抛出 {@link NullPointerException}
* 如果 location 是blank,抛出 {@link IllegalArgumentException}
* 如果 file 不存在,抛出 {@link UncheckedIOException}
* @since 4.0.1
*/
public static byte[] readToByteArray(String location){
InputStream inputStream = getInputStream(location);
try{
return IOUtils.toByteArray(inputStream);
}catch (IOException e){
throw new UncheckedIOException("location:" + location, e);
}
}
//---------------------------------------------------------------
/**
* 获得文件内容直接转成字符串.
*
*
* 方法内部已经关闭了相关流
*
*
* 示例:
*
*
* 比如在 /Users/feilong/feilong/logs/readFileToString.txt 文件中有 内容如下:
*
*
* feilong 我爱你
* feilong
*
*
* 此时你可以直接使用
*
*
* IOReaderUtil.readToString("/Users/feilong/feilong/logs/readFileToString.txt");
*
*
* 返回:
*
*
* feilong 我爱你
* feilong
*
*
*
*
* @param location
*
* - 支持全路径, 比如. "file:C:/test.dat".
* - 支持classpath 伪路径, e.g. "classpath:test.dat".
* - 支持相对路径, e.g. "WEB-INF/test.dat".
* - 如果上述都找不到,会再次转成FileInputStream,比如 "/Users/feilong/feilong-io/src/test/resources/readFileToString.txt"
*
* @return 如果 location 是null,抛出 {@link NullPointerException}
* 如果 location 是blank,抛出 {@link IllegalArgumentException}
* 如果 file 不存在,抛出 {@link UncheckedIOException}
* @see "org.apache.commons.io.FilenameUtils#readFileToString(File, Charset)"
* @see #readToString(File, String)
* @since 2.1.0
*/
public static String readToString(String location){
return readToString(location, DEFAULT_CHARSET_NAME);
}
/**
* 获得文件内容直接转成字符串.
*
*
* 方法内部已经关闭了相关流
*
*
* 示例:
*
*
* 比如在 /Users/feilong/feilong/logs/readFileToString.txt 文件中有 内容如下:
*
*
feilong 我爱你
feilong
*
*
* 此时你可以直接使用
*
*
* IOReaderUtil.readToString("/Users/feilong/feilong/logs/readFileToString.txt", UTF8);
*
*
* 返回:
*
*
feilong 我爱你
feilong
*
*
*
*
* @param location
*
* - 支持全路径, 比如. "file:C:/test.dat".
* - 支持classpath 伪路径, e.g. "classpath:test.dat".
* - 支持相对路径, e.g. "WEB-INF/test.dat".
* - 如果上述都找不到,会再次转成FileInputStream,比如 "/Users/feilong/feilong-io/src/test/resources/readFileToString.txt"
*
* @param charsetName
* 字符编码,如果是isNullOrEmpty,那么默认使用 {@link CharsetType#UTF8}
* @return 如果 location 是null,抛出 {@link NullPointerException}
* 如果 location 是blank,抛出 {@link IllegalArgumentException}
* 如果 file 不存在,抛出 {@link UncheckedIOException}
* @see "org.apache.commons.io.FilenameUtils#readFileToString(File, Charset)"
* @see #readToString(File, String)
* @since 1.0.8
* @since 1.14.0 rename from readFileToString
*/
public static String readToString(String location,String charsetName){
InputStream inputStream = getInputStream(location);
return readToString(inputStream, charsetName);
}
//---------------------------------------------------------------
/**
* 获得文件内容直接转成字符串.
*
* 方法内部已经关闭了相关流
*
*
* 示例:
*
*
* 比如在 /Users/feilong/feilong/logs/readFileToString.txt 文件中有 内容如下:
*
*
feilong 我爱你
feilong
*
*
* 此时你可以直接使用
*
*
* IOReaderUtil.readToString(new File("/Users/feilong/feilong/logs/readFileToString.txt"), UTF8);
*
*
* 返回:
*
*
feilong 我爱你
feilong
*
*
*
*
* @param file
* 文件
* @param charsetName
* 字符编码,如果是isNullOrEmpty,那么默认使用 {@link CharsetType#UTF8}
* @return 如果 file 是null,抛出 {@link NullPointerException}
* 如果 file 不存在,抛出 {@link UncheckedIOException}
* @see "org.apache.commons.io.FilenameUtils#readFileToString(File, Charset)"
* @since 1.5.3
* @since 1.14.0 rename from readFileToString
*/
public static String readToString(File file,String charsetName){
Validate.notNull(file, "file can't be null!");
//---------------------------------------------------------------
if (LOGGER.isDebugEnabled()){
LOGGER.debug("will read file:[{}] to String,use charsetName:[{}]", file.getAbsolutePath(), charsetName);
}
//---------------------------------------------------------------
try (FileInputStream fileInputStream = FileUtil.getFileInputStream(file)){
return readToString(fileInputStream, charsetName);
}catch (IOException e){
throw new UncheckedIOException(e);
}
}
//---------------------------------------------------------------
/**
* 读取文件内容.
*
*
* 方法内部已经关闭了相关流
*
*
* 示例:
*
*
* 比如在 /Users/feilong/feilong/logs/readFileToString.txt 文件中有 内容如下:
*
*
feilong 我爱你
feilong
*
*
* 此时你可以直接使用
*
*
* IOReaderUtil.readToString(FileUtil.getFileInputStream("/Users/feilong/feilong/logs/readFileToString.txt"), UTF8);
*
*
* 返回:
*
*
feilong 我爱你
feilong
*
*
*
*
* @param fileInputStream
* the file input stream
* @param charsetName
* 字符编码,如果是isNullOrEmpty,那么默认使用 {@link CharsetType#UTF8}
* @return 如果 fileInputStream 是null,抛出 {@link NullPointerException}
* @see "org.apache.commons.io.FilenameUtils#readFileToString(File, Charset)"
* @since 1.5.3
* @since 1.14.0 rename from getContent
*/
public static String readToString(FileInputStream fileInputStream,String charsetName){
Validate.notNull(fileInputStream, "inputStream can't be null!");
//---------------------------------------------------------------
if (LOGGER.isDebugEnabled()){
LOGGER.debug("start read fileInputStream:[{}] to String,use charsetName:[{}]", fileInputStream, charsetName);
}
//---------------------------------------------------------------
long beginTimeMillis = System.currentTimeMillis();
Charset charset = Charset.forName(defaultIfNullOrEmpty(charsetName, DEFAULT_CHARSET_NAME));
//---------------------------------------------------------------
// 分配新的直接字节缓冲区
final int capacity = 186140;
ByteBuffer byteBuffer = ByteBuffer.allocateDirect(capacity);
//---------------------------------------------------------------
// 用于读取、写入、映射和操作文件的通道.
FileChannel fileChannel = fileInputStream.getChannel();
try{
StringBuilder sb = new StringBuilder(capacity);
while (fileChannel.read(byteBuffer) != IOUtil.EOF){
// 反转此缓冲区
byteBuffer.flip();
sb.append(charset.decode(byteBuffer));
byteBuffer.clear();
}
//---------------------------------------------------------------
String result = sb.toString();
if (LOGGER.isInfoEnabled()){
LOGGER.info(
"end read fileInputStream:[{}],use time: [{}]",
fileInputStream,
formatDurationUseBeginTimeMillis(beginTimeMillis));
}
return result;
}catch (IOException e){
throw new UncheckedIOException(e);
}finally{
// 用完关闭流 是个好习惯,^_^
IOUtil.closeQuietly(fileInputStream);
}
}
//---------------------------------------------------------------
/**
* 读取 {@link InputStream} 内容.
*
*
* 方法内部已经关闭了相关流
*
*
* 示例:
*
*
* 比如你想访问 jd 的robots.txt,此时你可以使用 (注意此处仅做示例, 网络访问建议使用 feilong-net jar 的HttpClientUtil)
*
*
* String spec = "https://www.jd.com/robots.txt";
* InputStream openStream = URLUtil.openStream(URLUtil.toURL(spec));
* LOGGER.debug(IOReaderUtil.readToString(openStream, UTF8));
*
*
* 返回:
*
*
User-agent: *
Disallow: /?*
Disallow: /pop/*.html
Disallow: /pinpai/*.html?*
User-agent: EtaoSpider
Disallow: /
User-agent: HuihuiSpider
Disallow: /
User-agent: GwdangSpider
Disallow: /
User-agent: WochachaSpider
Disallow: /
*
*
*
*
* @param inputStream
* the input stream
* @param charsetName
* 字符编码,如果是isNullOrEmpty,那么默认使用 {@link CharsetType#UTF8}
* @return 如果 inputStream 是null,抛出 {@link NullPointerException}
* @see "org.apache.commons.io.IOUtils#toString(InputStream, String)"
* @see InputStreamUtil#toString(InputStream, String)
* @since 1.5.3
* @since 1.14.0 rename from getContent
*/
public static String readToString(InputStream inputStream,String charsetName){
Validate.notNull(inputStream, "inputStream can't be null!");
long beginTimeMillis = System.currentTimeMillis();
//---------------------------------------------------------------
if (LOGGER.isDebugEnabled()){
LOGGER.debug("start read inputStream:[{}] to String,use charsetName:[{}]", inputStream, charsetName);
}
//---------------------------------------------------------------
try{
String result = InputStreamUtil.toString(inputStream, defaultIfNullOrEmpty(charsetName, DEFAULT_CHARSET_NAME));
if (LOGGER.isInfoEnabled()){
LOGGER.info("end read inputStream:[{}],use time: [{}]", inputStream, formatDurationUseBeginTimeMillis(beginTimeMillis));
}
return result;
}finally{
// 用完关闭流 是个好习惯,^_^
IOUtil.closeQuietly(inputStream);
}
}
//---------------------------------------------------------------
/**
* 直接解析 {@code location} 成 {@link Set}.
*
*
* 使用默认的 {@link ReaderConfig#DEFAULT},忽略空白行,且去空格.
*
*
* @param location
*
* - 支持全路径, 比如. "file:C:/test.dat".
* - 支持classpath 伪路径, e.g. "classpath:test.dat".
* - 支持相对路径, e.g. "WEB-INF/test.dat".
* - 如果上述都找不到,会再次转成FileInputStream,比如 "/Users/feilong/feilong-io/src/test/resources/readFileToString.txt"
*
* @return 如果 location 是null,抛出 {@link NullPointerException}
* 如果 location 是blank,抛出 {@link IllegalArgumentException}
* @since 1.14.0
*/
public static Set readToSet(String location){
return readToSet(location, null);
}
/**
* 使用 {@link ReaderConfig}解析 {@link Reader}.
*
*
* 适合于对一个文件或者流,去除空白行, trim 并且读取指定的正则表达式内容形式
*
*
* 如果你以前这么写代码:
*
*
*
*
* InputStreamReader read = new InputStreamReader(resourceAsStream, ENCODING);
* Set{@code } codes = new LinkedHashSet{@code <>}();
* try{
* BufferedReader bufferedReader = new BufferedReader(STRING_READER);
* String lineTxt = null;
* while ((lineTxt = bufferedReader.readLine()) != null {@code &&} lineTxt.trim() != ""){
* codes.add(lineTxt.trim());
* }
*
* Iterator{@code } iterator = codes.iterator();
* while (iterator.hasNext()){
* String code = iterator.next();
* if (!code.matches("[0-9a-zA-Z\\-]{6,20}")){
* iterator.remove();
* }
* }
* }catch (Exception e){
* log.error(e.getMessage());
* }finally{
* read.close();
* }
* return set;
*
*
* 现在可以重构为:
*
*
* return IOReaderUtil.readToSet(STRING_READER, new ReaderConfig("[0-9a-zA-Z\\-]{6,20}"));
*
*
*
*
* @param location
*
* - 支持全路径, 比如. "file:C:/test.dat".
* - 支持classpath 伪路径, e.g. "classpath:test.dat".
* - 支持相对路径, e.g. "WEB-INF/test.dat".
* - 如果上述都找不到,会再次转成FileInputStream,比如 "/Users/feilong/feilong-io/src/test/resources/readFileToString.txt"
*
* @param readerConfig
* 读取配置, 如果传入的是 null,那么会使用默认的 {@link ReaderConfig#DEFAULT},忽略空白行,且去空格.
* @return 如果 location 是null,抛出 {@link NullPointerException}
* 如果 location 是blank,抛出 {@link IllegalArgumentException}
* @since 1.12.10
* @since 1.14.0 remove readerConfig NPE validate, will use {@link ReaderConfig#DEFAULT}
* @since 1.14.0 rename from read
*/
public static Set readToSet(String location,ReaderConfig readerConfig){
InputStream inputStream = getInputStream(location);
return readToSet(InputStreamUtil.toBufferedReader(inputStream, UTF8), readerConfig);
}
/**
* 使用 {@link ReaderConfig}解析 {@link Reader}.
*
*
* 适合于对一个文件或者流,去除空白行, trim 并且读取指定的正则表达式内容形式
*
*
* 如果你以前这么写代码:
*
*
*
*
* InputStreamReader read = new InputStreamReader(resourceAsStream, ENCODING);
* Set{@code } codes = new LinkedHashSet{@code <>}();
* try{
* BufferedReader bufferedReader = new BufferedReader(STRING_READER);
* String lineTxt = null;
* while ((lineTxt = bufferedReader.readLine()) != null {@code &&} lineTxt.trim() != ""){
* codes.add(lineTxt.trim());
* }
*
* Iterator{@code } iterator = codes.iterator();
* while (iterator.hasNext()){
* String code = iterator.next();
* if (!code.matches("[0-9a-zA-Z\\-]{6,20}")){
* iterator.remove();
* }
* }
* }catch (Exception e){
* log.error(e.getMessage());
* }finally{
* read.close();
* }
* return set;
*
*
* 现在可以重构为:
*
*
* return IOReaderUtil.readToSet(STRING_READER, new ReaderConfig("[0-9a-zA-Z\\-]{6,20}"));
*
*
*
*
* @param file
* the file
* @param readerConfig
* 读取配置, 如果传入的是 null,那么会使用默认的 {@link ReaderConfig#DEFAULT},忽略空白行,且去空格.
* @return 如果 file 是null,抛出 {@link NullPointerException}
* 如果 readerConfig 是null,抛出 {@link NullPointerException}
* @since 1.12.10
* @since 1.14.0 remove readerConfig NPE validate, will use {@link ReaderConfig#DEFAULT}
* @since 1.14.0 rename from read
*/
public static Set readToSet(File file,ReaderConfig readerConfig){
Validate.notNull(file, "file can't be null!");
try (Reader reader = new FileReader(file);){
return readToSet(reader, readerConfig);
}catch (IOException e){
throw new UncheckedIOException(e);
}
}
/**
* 使用 {@link ReaderConfig}解析 {@link Reader}.
*
*
* 适合于对一个文件或者流,去除空白行, trim 并且读取指定的正则表达式内容形式
*
*
* 如果你以前这么写代码:
*
*
*
*
* InputStreamReader read = new InputStreamReader(resourceAsStream, ENCODING);
* Set{@code } codes = new LinkedHashSet{@code <>}();
* try{
* BufferedReader bufferedReader = new BufferedReader(STRING_READER);
* String lineTxt = null;
* while ((lineTxt = bufferedReader.readLine()) != null {@code &&} lineTxt.trim() != ""){
* codes.add(lineTxt.trim());
* }
*
* Iterator{@code } iterator = codes.iterator();
* while (iterator.hasNext()){
* String code = iterator.next();
* if (!code.matches("[0-9a-zA-Z\\-]{6,20}")){
* iterator.remove();
* }
* }
* }catch (Exception e){
* log.error(e.getMessage());
* }finally{
* read.close();
* }
* return set;
*
*
* 现在可以重构为:
*
*
* return IOReaderUtil.readToSet(STRING_READER, new ReaderConfig("[0-9a-zA-Z\\-]{6,20}"));
*
*
*
*
* @param reader
* the reader
* @param readerConfig
* 读取配置, 如果传入的是 null,那么会使用默认的 {@link ReaderConfig#DEFAULT},忽略空白行,且去空格.
* @return 如果 reader 是null,抛出 {@link NullPointerException}
* 如果 readerConfig 是null,抛出 {@link NullPointerException}
* @since 1.12.10
* @since 1.14.0 remove readerConfig NPE validate, will use {@link ReaderConfig#DEFAULT}
* @since 1.14.0 rename from read
*/
public static Set readToSet(Reader reader,ReaderConfig readerConfig){
Validate.notNull(reader, "reader can't be null!");
ReaderConfig useReaderConfig = defaultIfNull(readerConfig, ReaderConfig.DEFAULT);
//---------------------------------------------------------------
if (LOGGER.isDebugEnabled()){
LOGGER.debug("start read reader:[{}], readerConfig:[{}]", reader, JsonUtil.toString(useReaderConfig));
}
//---------------------------------------------------------------
long beginTimeMillis = System.currentTimeMillis();
Set set = newLinkedHashSet();
//---------------------------------------------------------------
try (LineNumberReader lineNumberReader = new LineNumberReader(reader);){
String line = null;
while ((line = lineNumberReader.readLine()) != null){
if (useReaderConfig.getIsTrim()){
line = StringUtils.trim(line);
}
if (isIgnoreLine(line, useReaderConfig)){
continue;
}
set.add(line);
}
}catch (IOException e){
throw new UncheckedIOException(e);
}finally{
IOUtil.closeQuietly(reader);
}
//---------------------------------------------------------------
if (LOGGER.isInfoEnabled()){
String format = "end read reader:[{}],readerConfig:[{}],use time: [{}]";
LOGGER.info(format, reader, JsonUtil.toString(useReaderConfig), formatDurationUseBeginTimeMillis(beginTimeMillis));
}
return set;
}
private static boolean isIgnoreLine(String line,ReaderConfig readerConfig){
String regexPattern = readerConfig.getRegexPattern();
//不符合正则
if (isNotNullOrEmpty(regexPattern) && !ValidatorUtil.isMatches(regexPattern, line)){
return true;
}
//空白
return isNullOrEmpty(line) && readerConfig.getIgnoreBlankLine();
}
//---------------------------------------------------------------
/**
* 使用 {@link LineNumberReaderResolver}解析文件.
*
*
* 如果 location 是null,抛出 {@link NullPointerException}
* 如果 location 是blank,抛出 {@link IllegalArgumentException}
*
* 如果 lineNumberReaderResolver 是null,抛出 {@link NullPointerException}
*
*
* @param location
*
* - 支持全路径, 比如. "file:C:/test.dat".
* - 支持classpath 伪路径, e.g. "classpath:test.dat".
* - 支持相对路径, e.g. "WEB-INF/test.dat".
* - 如果上述都找不到,会再次转成FileInputStream,比如 "/Users/feilong/feilong-io/src/test/resources/readFileToString.txt"
*
* @param lineNumberReaderResolver
* the line number reader resolver
* @see #resolverFile(File, LineNumberReaderResolver)
* @since 1.4.1
*/
public static void resolverFile(String location,LineNumberReaderResolver lineNumberReaderResolver){
Validate.notNull(lineNumberReaderResolver, "lineNumberReaderResolver can't be null!");
//---------------------------------------------------------------
if (LOGGER.isTraceEnabled()){
LOGGER.trace("will resolverFile location:[{}],use lineNumberReaderResolver:[{}]", location, lineNumberReaderResolver);
}
//---------------------------------------------------------------
InputStream inputStream = getInputStream(location);
resolverFile(InputStreamUtil.toBufferedReader(inputStream, UTF8), lineNumberReaderResolver);
}
/**
* 使用 {@link LineNumberReaderResolver}解析文件.
*
*
* 如果 file 是null,抛出 {@link NullPointerException}
* 如果 lineNumberReaderResolver 是null,抛出 {@link NullPointerException}
*
*
* @param file
* the file
* @param lineNumberReaderResolver
* the line number reader resolver
* @since 1.4.1
*/
public static void resolverFile(File file,LineNumberReaderResolver lineNumberReaderResolver){
Validate.notNull(file, "file can't be null!");
Validate.notNull(lineNumberReaderResolver, "lineNumberReaderResolver can't be null!");
//---------------------------------------------------------------
if (LOGGER.isDebugEnabled()){
LOGGER.debug("will resolverFile file:[{}], lineNumberReaderResolver:[{}]", file.getAbsolutePath(), lineNumberReaderResolver);
}
//---------------------------------------------------------------
try (Reader reader = new FileReader(file);){
resolverFile(reader, lineNumberReaderResolver);
}catch (IOException e){
throw new UncheckedIOException(e);
}
}
//---------------------------------------------------------------
/**
* 使用 {@link LineNumberReaderResolver}解析 {@link Reader}.
*
* 如果你以前这么写代码:
*
*
*
*
*
* InputStreamReader read = new InputStreamReader(resourceAsStream, ENCODING);
* try{
* Set{@code } set = new HashSet{@code <>}();
* BufferedReader bufferedReader = new BufferedReader(read);
* String txt = null;
* while ((txt = bufferedReader.readLine()) != null){ // 读取文件,将文件内容放入到set中
* txt = txt.trim();// 忽略前面前后空格
* txt = txt.replace(" ", "");// 文中过滤空格
* set.add(txt);
* }
* }catch (Exception e){
* log.error(e.getMessage());
* }finally{
* read.close(); // 关闭文件流
* }
* return set;
*
*
*
* 现在可以重构为:
*
*
* InputStreamReader read = new InputStreamReader(resourceAsStream, ENCODING);
*
* final Set{@code } set = new HashSet{@code <>}();
*
* IOReaderUtil.resolverFile(read, new LineNumberReaderResolver(){
*
* {@code @Override}
* public boolean resolve(int lineNumber,String line){
* line = line.trim();// 忽略前面前后空格
* line = line.replace(" ", "");// 文中过滤空格
* set.add(line);// 读取文件,将文件内容放入到set中
* return true;
* }
* });
* return set;
*
*
*
*
*
* 如果 reader 是null,抛出 {@link NullPointerException}
* 如果 lineNumberReaderResolver 是null,抛出 {@link NullPointerException}
*
*
* @param reader
* the reader
* @param lineNumberReaderResolver
* the line number reader resolver
* @since 1.4.1
*/
public static void resolverFile(Reader reader,LineNumberReaderResolver lineNumberReaderResolver){
Validate.notNull(reader, "reader can't be null!");
Validate.notNull(lineNumberReaderResolver, "lineNumberReaderResolver can't be null!");
//---------------------------------------------------------------
if (LOGGER.isDebugEnabled()){
LOGGER.debug("start resolverFile reader:[{}], lineNumberReaderResolver:[{}]", reader, lineNumberReaderResolver);
}
long beginTimeMillis = System.currentTimeMillis();
//---------------------------------------------------------------
try (LineNumberReader lineNumberReader = new LineNumberReader(reader);){
String line = null;
while ((line = lineNumberReader.readLine()) != null){
int lineNumber = lineNumberReader.getLineNumber();
boolean result = lineNumberReaderResolver.resolve(lineNumber, line);
if (!result){
break;
}
}
}catch (IOException e){
throw new UncheckedIOException(e);
}finally{
IOUtil.closeQuietly(reader);
}
//---------------------------------------------------------------
if (LOGGER.isInfoEnabled()){
String format = "end resolverFile reader:[{}],lineNumberReaderResolver:[{}],use time: [{}]";
LOGGER.info(format, reader, lineNumberReaderResolver, formatDurationUseBeginTimeMillis(beginTimeMillis));
}
}
/**
* @param location
* @param charsetName
* @return 如果 location 是null,抛出 {@link NullPointerException}
* 如果 location 是blank,抛出 {@link IllegalArgumentException}
* @since 4.0.1
*/
private static InputStream getInputStream(String location){
Validate.notBlank(location, "location can't be blank!");
//---------------------------------------------------------------
if (LOGGER.isTraceEnabled()){
LOGGER.trace("will read location:[{}] to String", location);
}
//---------------------------------------------------------------
return InputStreamUtil.getInputStream(location);
}
}