Java-112 Merge duplicate Java read from file articles
This commit is contained in:
mikr
parent
d7fd1e2493
commit
b155b71c4b
|
|
@ -1,134 +0,0 @@
|
||||||
package com.baeldung.readfile;
|
|
||||||
|
|
||||||
import org.apache.commons.io.FileUtils;
|
|
||||||
import org.apache.commons.io.IOUtils;
|
|
||||||
import org.hamcrest.CoreMatchers;
|
|
||||||
import org.hamcrest.Matchers;
|
|
||||||
import org.junit.Test;
|
|
||||||
|
|
||||||
import java.io.BufferedReader;
|
|
||||||
import java.io.File;
|
|
||||||
import java.io.FileInputStream;
|
|
||||||
import java.io.IOException;
|
|
||||||
import java.io.InputStream;
|
|
||||||
import java.io.InputStreamReader;
|
|
||||||
import java.net.URISyntaxException;
|
|
||||||
import java.net.URL;
|
|
||||||
import java.net.URLConnection;
|
|
||||||
import java.nio.file.Files;
|
|
||||||
import java.nio.file.Path;
|
|
||||||
import java.nio.file.Paths;
|
|
||||||
import java.util.stream.Collectors;
|
|
||||||
import java.util.stream.Stream;
|
|
||||||
|
|
||||||
import static org.junit.Assert.assertEquals;
|
|
||||||
import static org.junit.Assert.assertThat;
|
|
||||||
|
|
||||||
public class FileOperationsManualTest {
|
|
||||||
|
|
||||||
@Test
|
|
||||||
public void givenFileName_whenUsingClassloader_thenFileData() throws IOException {
|
|
||||||
String expectedData = "Hello World from fileTest.txt!!!";
|
|
||||||
|
|
||||||
ClassLoader classLoader = getClass().getClassLoader();
|
|
||||||
File file = new File(classLoader.getResource("fileTest.txt").getFile());
|
|
||||||
InputStream inputStream = new FileInputStream(file);
|
|
||||||
String data = readFromInputStream(inputStream);
|
|
||||||
|
|
||||||
assertEquals(expectedData, data.trim());
|
|
||||||
}
|
|
||||||
|
|
||||||
@Test
|
|
||||||
public void givenFileNameAsAbsolutePath_whenUsingClasspath_thenFileData() throws IOException {
|
|
||||||
String expectedData = "Hello World from fileTest.txt!!!";
|
|
||||||
|
|
||||||
Class clazz = FileOperationsManualTest.class;
|
|
||||||
InputStream inputStream = clazz.getResourceAsStream("/fileTest.txt");
|
|
||||||
String data = readFromInputStream(inputStream);
|
|
||||||
|
|
||||||
assertEquals(expectedData, data.trim());
|
|
||||||
}
|
|
||||||
|
|
||||||
@Test
|
|
||||||
public void givenFileName_whenUsingJarFile_thenFileData() throws IOException {
|
|
||||||
String expectedData = "MIT License";
|
|
||||||
|
|
||||||
Class clazz = Matchers.class;
|
|
||||||
InputStream inputStream = clazz.getResourceAsStream("/LICENSE.txt");
|
|
||||||
String data = readFromInputStream(inputStream);
|
|
||||||
|
|
||||||
assertThat(data.trim(), CoreMatchers.containsString(expectedData));
|
|
||||||
}
|
|
||||||
|
|
||||||
@Test
|
|
||||||
public void givenURLName_whenUsingURL_thenFileData() throws IOException {
|
|
||||||
String expectedData = "Example Domain";
|
|
||||||
|
|
||||||
URL urlObject = new URL("http://www.example.com/");
|
|
||||||
|
|
||||||
URLConnection urlConnection = urlObject.openConnection();
|
|
||||||
|
|
||||||
InputStream inputStream = urlConnection.getInputStream();
|
|
||||||
String data = readFromInputStream(inputStream);
|
|
||||||
|
|
||||||
assertThat(data.trim(), CoreMatchers.containsString(expectedData));
|
|
||||||
}
|
|
||||||
|
|
||||||
@Test
|
|
||||||
public void givenFileName_whenUsingFileUtils_thenFileData() throws IOException {
|
|
||||||
String expectedData = "Hello World from fileTest.txt!!!";
|
|
||||||
|
|
||||||
ClassLoader classLoader = getClass().getClassLoader();
|
|
||||||
File file = new File(classLoader.getResource("fileTest.txt").getFile());
|
|
||||||
String data = FileUtils.readFileToString(file, "UTF-8");
|
|
||||||
|
|
||||||
assertEquals(expectedData, data.trim());
|
|
||||||
}
|
|
||||||
|
|
||||||
@Test
|
|
||||||
public void givenFilePath_whenUsingFilesReadAllBytes_thenFileData() throws IOException, URISyntaxException {
|
|
||||||
String expectedData = "Hello World from fileTest.txt!!!";
|
|
||||||
|
|
||||||
Path path = Paths.get(getClass().getClassLoader().getResource("fileTest.txt").toURI());
|
|
||||||
|
|
||||||
byte[] fileBytes = Files.readAllBytes(path);
|
|
||||||
String data = new String(fileBytes);
|
|
||||||
|
|
||||||
assertEquals(expectedData, data.trim());
|
|
||||||
}
|
|
||||||
|
|
||||||
@Test
|
|
||||||
public void givenFilePath_whenUsingFilesLines_thenFileData() throws IOException, URISyntaxException {
|
|
||||||
String expectedData = "Hello World from fileTest.txt!!!";
|
|
||||||
|
|
||||||
Path path = Paths.get(getClass().getClassLoader().getResource("fileTest.txt").toURI());
|
|
||||||
|
|
||||||
Stream<String> lines = Files.lines(path);
|
|
||||||
String data = lines.collect(Collectors.joining("\n"));
|
|
||||||
lines.close();
|
|
||||||
|
|
||||||
assertEquals(expectedData, data.trim());
|
|
||||||
}
|
|
||||||
|
|
||||||
private String readFromInputStream(InputStream inputStream) throws IOException {
|
|
||||||
StringBuilder resultStringBuilder = new StringBuilder();
|
|
||||||
try (BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream))) {
|
|
||||||
String line;
|
|
||||||
while ((line = bufferedReader.readLine()) != null) {
|
|
||||||
resultStringBuilder.append(line).append("\n");
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
return resultStringBuilder.toString();
|
|
||||||
}
|
|
||||||
|
|
||||||
@Test
|
|
||||||
public void givenFileName_whenUsingIOUtils_thenFileData() throws IOException {
|
|
||||||
String expectedData = "This is a content of the file";
|
|
||||||
|
|
||||||
FileInputStream fis = new FileInputStream("src/test/resources/fileToRead.txt");
|
|
||||||
String data = IOUtils.toString(fis, "UTF-8");
|
|
||||||
|
|
||||||
assertEquals(expectedData, data.trim());
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
@ -1,11 +1,15 @@
|
||||||
package com.baeldung.readfile;
|
package com.baeldung.readfile;
|
||||||
|
|
||||||
|
import org.apache.commons.io.FileUtils;
|
||||||
|
import org.apache.commons.io.IOUtils;
|
||||||
|
import org.hamcrest.CoreMatchers;
|
||||||
|
import org.hamcrest.Matchers;
|
||||||
import org.junit.Test;
|
import org.junit.Test;
|
||||||
import org.junit.Ignore;
|
|
||||||
import org.slf4j.Logger;
|
|
||||||
import org.slf4j.LoggerFactory;
|
|
||||||
|
|
||||||
import java.io.*;
|
import java.io.*;
|
||||||
|
import java.net.URISyntaxException;
|
||||||
|
import java.net.URL;
|
||||||
|
import java.net.URLConnection;
|
||||||
import java.nio.ByteBuffer;
|
import java.nio.ByteBuffer;
|
||||||
import java.nio.channels.FileChannel;
|
import java.nio.channels.FileChannel;
|
||||||
import java.nio.charset.Charset;
|
import java.nio.charset.Charset;
|
||||||
|
|
@ -13,14 +17,15 @@ import java.nio.file.Files;
|
||||||
import java.nio.file.Path;
|
import java.nio.file.Path;
|
||||||
import java.nio.file.Paths;
|
import java.nio.file.Paths;
|
||||||
import java.util.Scanner;
|
import java.util.Scanner;
|
||||||
|
import java.util.stream.Collectors;
|
||||||
|
import java.util.stream.Stream;
|
||||||
|
|
||||||
|
import static org.hamcrest.MatcherAssert.assertThat;
|
||||||
import static org.junit.Assert.assertEquals;
|
import static org.junit.Assert.assertEquals;
|
||||||
import static org.junit.Assert.assertTrue;
|
import static org.junit.Assert.assertTrue;
|
||||||
|
|
||||||
public class JavaReadFromFileUnitTest {
|
public class JavaReadFromFileUnitTest {
|
||||||
|
|
||||||
private static final Logger LOG = LoggerFactory.getLogger(JavaReadFromFileUnitTest.class);
|
|
||||||
|
|
||||||
@Test
|
@Test
|
||||||
public void whenReadWithBufferedReader_thenCorrect() throws IOException {
|
public void whenReadWithBufferedReader_thenCorrect() throws IOException {
|
||||||
final String expected_value = "Hello world";
|
final String expected_value = "Hello world";
|
||||||
|
|
@ -32,6 +37,100 @@ public class JavaReadFromFileUnitTest {
|
||||||
assertEquals(expected_value, currentLine);
|
assertEquals(expected_value, currentLine);
|
||||||
}
|
}
|
||||||
|
|
||||||
|
@Test
|
||||||
|
public void givenFileName_whenUsingClassloader_thenFileData() throws IOException {
|
||||||
|
String expectedData = "Hello World from fileTest.txt!!!";
|
||||||
|
|
||||||
|
ClassLoader classLoader = getClass().getClassLoader();
|
||||||
|
File file = new File(classLoader.getResource("fileTest.txt").getFile());
|
||||||
|
InputStream inputStream = new FileInputStream(file);
|
||||||
|
String data = readFromInputStream(inputStream);
|
||||||
|
|
||||||
|
assertEquals(expectedData, data.trim());
|
||||||
|
}
|
||||||
|
|
||||||
|
@Test
|
||||||
|
public void givenFileNameAsAbsolutePath_whenUsingClasspath_thenFileData() throws IOException {
|
||||||
|
String expectedData = "Hello World from fileTest.txt!!!";
|
||||||
|
|
||||||
|
Class clazz = JavaReadFromFileUnitTest.class;
|
||||||
|
InputStream inputStream = clazz.getResourceAsStream("/fileTest.txt");
|
||||||
|
String data = readFromInputStream(inputStream);
|
||||||
|
|
||||||
|
assertEquals(expectedData, data.trim());
|
||||||
|
}
|
||||||
|
|
||||||
|
@Test
|
||||||
|
public void givenFileName_whenUsingJarFile_thenFileData() throws IOException {
|
||||||
|
String expectedData = "BSD License";
|
||||||
|
|
||||||
|
Class clazz = Matchers.class;
|
||||||
|
InputStream inputStream = clazz.getResourceAsStream("/LICENSE.txt");
|
||||||
|
String data = readFromInputStream(inputStream);
|
||||||
|
|
||||||
|
assertThat(data.trim(), CoreMatchers.containsString(expectedData));
|
||||||
|
}
|
||||||
|
|
||||||
|
@Test
|
||||||
|
public void givenURLName_whenUsingURL_thenFileData() throws IOException {
|
||||||
|
String expectedData = "Example Domain";
|
||||||
|
|
||||||
|
URL urlObject = new URL("http://www.example.com/");
|
||||||
|
|
||||||
|
URLConnection urlConnection = urlObject.openConnection();
|
||||||
|
|
||||||
|
InputStream inputStream = urlConnection.getInputStream();
|
||||||
|
String data = readFromInputStream(inputStream);
|
||||||
|
|
||||||
|
assertThat(data.trim(), CoreMatchers.containsString(expectedData));
|
||||||
|
}
|
||||||
|
|
||||||
|
@Test
|
||||||
|
public void givenFileName_whenUsingFileUtils_thenFileData() throws IOException {
|
||||||
|
String expectedData = "Hello World from fileTest.txt!!!";
|
||||||
|
|
||||||
|
ClassLoader classLoader = getClass().getClassLoader();
|
||||||
|
File file = new File(classLoader.getResource("fileTest.txt").getFile());
|
||||||
|
String data = FileUtils.readFileToString(file, "UTF-8");
|
||||||
|
|
||||||
|
assertEquals(expectedData, data.trim());
|
||||||
|
}
|
||||||
|
|
||||||
|
@Test
|
||||||
|
public void givenFilePath_whenUsingFilesReadAllBytes_thenFileData() throws IOException, URISyntaxException {
|
||||||
|
String expectedData = "Hello World from fileTest.txt!!!";
|
||||||
|
|
||||||
|
Path path = Paths.get(getClass().getClassLoader().getResource("fileTest.txt").toURI());
|
||||||
|
|
||||||
|
byte[] fileBytes = Files.readAllBytes(path);
|
||||||
|
String data = new String(fileBytes);
|
||||||
|
|
||||||
|
assertEquals(expectedData, data.trim());
|
||||||
|
}
|
||||||
|
|
||||||
|
@Test
|
||||||
|
public void givenFilePath_whenUsingFilesLines_thenFileData() throws IOException, URISyntaxException {
|
||||||
|
String expectedData = "Hello World from fileTest.txt!!!";
|
||||||
|
|
||||||
|
Path path = Paths.get(getClass().getClassLoader().getResource("fileTest.txt").toURI());
|
||||||
|
|
||||||
|
Stream<String> lines = Files.lines(path);
|
||||||
|
String data = lines.collect(Collectors.joining("\n"));
|
||||||
|
lines.close();
|
||||||
|
|
||||||
|
assertEquals(expectedData, data.trim());
|
||||||
|
}
|
||||||
|
|
||||||
|
@Test
|
||||||
|
public void givenFileName_whenUsingIOUtils_thenFileData() throws IOException {
|
||||||
|
String expectedData = "This is a content of the file";
|
||||||
|
|
||||||
|
FileInputStream fis = new FileInputStream("src/test/resources/test_read9.in");
|
||||||
|
String data = IOUtils.toString(fis, "UTF-8");
|
||||||
|
|
||||||
|
assertEquals(expectedData, data.trim());
|
||||||
|
}
|
||||||
|
|
||||||
@Test
|
@Test
|
||||||
public void whenReadWithScanner_thenCorrect() throws IOException {
|
public void whenReadWithScanner_thenCorrect() throws IOException {
|
||||||
final Scanner scanner = new Scanner(new File("src/test/resources/test_read1.in"));
|
final Scanner scanner = new Scanner(new File("src/test/resources/test_read1.in"));
|
||||||
|
|
@ -106,13 +205,11 @@ public class JavaReadFromFileUnitTest {
|
||||||
}
|
}
|
||||||
|
|
||||||
@Test
|
@Test
|
||||||
@Ignore // TODO
|
|
||||||
public void whenReadUTFEncodedFile_thenCorrect() throws IOException {
|
public void whenReadUTFEncodedFile_thenCorrect() throws IOException {
|
||||||
final String expected_value = "青空";
|
final String expected_value = "青空";
|
||||||
final BufferedReader reader = new BufferedReader(new InputStreamReader(new FileInputStream("src/test/resources/test_read7.in"), "UTF-8"));
|
final BufferedReader reader = new BufferedReader(new InputStreamReader(new FileInputStream("src/test/resources/test_read7.in"), "UTF-8"));
|
||||||
final String currentLine = reader.readLine();
|
final String currentLine = reader.readLine();
|
||||||
reader.close();
|
reader.close();
|
||||||
LOG.debug(currentLine);
|
|
||||||
|
|
||||||
assertEquals(expected_value, currentLine);
|
assertEquals(expected_value, currentLine);
|
||||||
}
|
}
|
||||||
|
|
@ -171,4 +268,16 @@ public class JavaReadFromFileUnitTest {
|
||||||
assertEquals(expected_value, line);
|
assertEquals(expected_value, line);
|
||||||
}
|
}
|
||||||
|
|
||||||
|
private String readFromInputStream(InputStream inputStream) throws IOException {
|
||||||
|
StringBuilder resultStringBuilder = new StringBuilder();
|
||||||
|
try (BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream))) {
|
||||||
|
String line;
|
||||||
|
while ((line = bufferedReader.readLine()) != null) {
|
||||||
|
resultStringBuilder.append(line).append("\n");
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
return resultStringBuilder.toString();
|
||||||
|
}
|
||||||
|
|
||||||
}
|
}
|
||||||
|
|
|
||||||
|
|
@ -0,0 +1 @@
|
||||||
|
This is a content of the file
|
||||||
Loading…
Reference in New Issue