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minor jaackson example and new streaming logic for large files

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eugenp
2014-01-15 19:53:33 +02:00
parent ff141b5afb
commit 0f9fef5337
5 changed files with 128 additions and 3 deletions
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27
core-java/src/test/java/org/baeldung/java/CoreJavaIoIntegrationTest.java
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@@ -6,6 +6,7 @@ import java.io.IOException;
import java.util.Scanner;
import org.apache.commons.io.FileUtils;
import org.apache.commons.io.LineIterator;
import org.junit.Test;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
@@ -29,9 +30,9 @@ public class CoreJavaIoIntegrationTest {
}
@Test
public final void givenUsingCommonsIo_whenIteratingAFile_thenCorrect() throws IOException {
final String path = "G:\\full\\train\\input\\" + "trainDataNegative.csv";
// final String path = "G:\\full\\train\\input\\" + "trainDataPositive.csv";
public final void givenUsingCommonsIo_whenIteratingAFileInMemory_thenCorrect() throws IOException {
// final String path = "G:\\full\\train\\input\\" + "trainDataNegative.csv";
final String path = "G:\\full\\train\\input\\" + "trainDataPositive.csv";
logMemory();
FileUtils.readLines(new File(path));
@@ -70,6 +71,26 @@ public class CoreJavaIoIntegrationTest {
logMemory();
}
@Test
public final void givenUsingApacheIo_whenStreamingThroughAFile_thenCorrect() throws IOException {
final String path = "G:\\full\\train\\input\\" + "trainDataNegative.csv";
// final String path = "G:\\full\\train\\input\\" + "trainDataPositive.csv";
logMemory();
final LineIterator it = FileUtils.lineIterator(new File(path), "UTF-8");
try {
while (it.hasNext()) {
final String line = it.nextLine();
// do something with line
}
} finally {
LineIterator.closeQuietly(it);
}
logMemory();
}
// utils
private final void logMemory() {