في Java كيف تقرأ ملف وتحول الملف إلى سلسلة؟ (5 طرق مختلفة)
نشرت: 2021-11-21
ما هي أبسط طريقة لقراءة ملف إلى سلسلة؟ هل تريد قراءة ملف نص عادي في جافا؟ كيف تريد تحويل كائن ملف إلى كائن سلسلة؟ هناك عدة طرق يمكننا من خلالها قراءة ملف ونقله إلى String.
هناك 5 طرق إجمالية لتحويل ملف نصي كامل إلى سلسلة في Java.
- Files.readString ()
- Files.readAllLines (Paths.get (path)، StandardCharsets.UTF_8) ؛
- FileUtils.readFileToString (ملف جديد (مسار) ، StandardCharsets.UTF_8) ؛ - تبعية Apache Commons IO
- Files.lines ()
- Files.newBufferedReader ()
هيا بنا نبدأ:
- تأكد من إضافة تبعية Apache Commons IO أدناه.
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< dependency > < groupId > commons - io < / groupId > < artifactId > commons - io < / artifactId > < version > 2.11.0 < / version > < / dependency > |
- قم بإنشاء فئة CrunchifyConvertFileToString.java.
- انسخ والصق الكود أدناه فيه.
CrunchifyConvertFileToString.java
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package crunchify . com . java . tutorials ; import org . apache . commons . io . FileUtils ; import java . io . File ; import java . io . IOException ; import java . nio . charset . StandardCharsets ; import java . nio . file . Files ; import java . nio . file . Paths ; import java . util . List ; /** * @author Crunchify.com * Program: In Java How to Read a File and Convert File to String? (5 different ways) */ public class CrunchifyConvertFileToString { public static void main ( String [ ] args ) { // Files.readString() crunchifyFilesReadString ( ) ; // Files.readAllLines(Paths.get(); crunchifyFilesReadAllLines ( ) ; // FileUtils.readFileToString(new File(); // Apache Commons IO method crunchifyFileUtilsReadFileToString ( ) ; // Files.lines() // Please visit: https://crunchify.me/3CDrP7N crunchifyFilesLines ( ) ; // Files.newBufferedReader() // Please visit: https://crunchify.me/3CDrP7N crunchifyFilesNewBufferedReader ( ) ; } /* Method-1: Files.readString() */ private static void crunchifyFilesReadString ( ) { String crunchifyFilePath = "/Users/app/Downloads/crunchify-file-to-string.txt" ; try { crunchifyLog ( "\n================= Files.readString() =================" ) ; // Files: This class consists exclusively of static methods that operate on files, directories, or other types of files. // Paths: This class consists exclusively of static methods that return a Path by converting a path string or URI. // get(): Converts a path string, or a sequence of strings that when joined form a path string, to a Path. String crunchifyFileData = Files . readString ( Paths . get ( crunchifyFilePath ) ) ; crunchifyLog ( crunchifyFileData ) ; } catch ( IOException exception ) { exception . printStackTrace ( ) ; } } /* Simple Logging Utility */ private static void crunchifyLog ( Object crunchifyFileData ) { System . out . println ( crunchifyFileData ) ; } /* Method-2: Files.readAllLines(Paths.get(); */ private static void crunchifyFilesReadAllLines ( ) { crunchifyLog ( "================= Files.readAllLines() =================" ) ; String crunchifyFilePath = "/Users/app/Downloads/crunchify-file-to-string.txt" ; try { // readAllLines(): Read all lines from a file. This method ensures that the file is closed when // all bytes have been read or an I/O error, or other runtime exception, is thrown. // Bytes from the file are decoded into characters using the specified charset. // This method recognizes the following as line terminators: /* \u000D followed by \u000A, CARRIAGE RETURN followed by LINE FEED \u000A, LINE FEED \u000D, CARRIAGE RETURN */ List < String > crunchifyFileData = Files . readAllLines ( Paths . get ( crunchifyFilePath ) , StandardCharsets . UTF_8 ) ; crunchifyLog ( crunchifyFileData ) ; } catch ( IOException exception ) { exception . printStackTrace ( ) ; } } /* Method-3: FileUtils.readFileToString(new File(); Apache Commons IO: <dependency><groupId>commons-io</groupId><artifactId>commons-io</artifactId><version>2.6</version></dependency> */ private static void crunchifyFileUtilsReadFileToString ( ) { crunchifyLog ( "\n================= FileUtils.readFileToString() =================" ) ; String crunchifyFilePath = "/Users/app/Downloads/crunchify-file-to-string.txt" ; try { // readFileToString: Reads the contents of a file into a String. The file is always closed. String crunchifyFileData = FileUtils . readFileToString ( new File ( crunchifyFilePath ) , StandardCharsets . UTF_8 ) ; // UTF_8: Eight-bit UCS Transformation Format. crunchifyLog ( crunchifyFileData ) ; } catch ( IOException exception ) { exception . printStackTrace ( ) ; } } /* Method-4: Files.lines() */ private static void crunchifyFilesLines ( ) { // Please visit: https://crunchify.me/3CDrP7N } /* Method-5: Files.newBufferedReader() */ private static void crunchifyFilesNewBufferedReader ( ) { // Please visit: https://crunchify.me/3CDrP7N } } |
نتيجة وحدة التحكم IntelliJ IDEA:
فقط قم بتشغيل البرنامج أعلاه كتطبيق Java سترى النتيجة على النحو التالي.

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================= Files . readString ( ) ================= Five Ways to Read File and Convert it to String : ) Files . readString ( ) Files . readAllLines ( Paths . get ( path ) , StandardCharsets . UTF_8 ) ; FileUtils . readFileToString ( new File ( path ) , StandardCharsets . UTF_8 ) ; Files . lines ( ) Files . newBufferedReader ( ) ================= Files . readAllLines ( ) ================= [ Five Ways to Read File and Convert it to String : ) , , Files . readString ( ) , Files . readAllLines ( Paths . get ( path ) , StandardCharsets . UTF_8 ) ; , FileUtils . readFileToString ( new File ( path ) , StandardCharsets . UTF_8 ) ; , Files . lines ( ) , Files . newBufferedReader ( ) ] ================= FileUtils . readFileToString ( ) ================= Five Ways to Read File and Convert it to String : ) Files . readString ( ) Files . readAllLines ( Paths . get ( path ) , StandardCharsets . UTF_8 ) ; FileUtils . readFileToString ( new File ( path ) , StandardCharsets . UTF_8 ) ; Files . lines ( ) Files . newBufferedReader ( ) Process finished with exit code 0 |
اسمحوا لي أن أعرف إذا كنت تواجه أي مشكلة في تشغيل الرمز أعلاه.
إليك برنامج تعليمي يشرح الطريقة 4 والطريقة 5: