diff --git a/core-java-modules/core-java/pom.xml b/core-java-modules/core-java/pom.xml index db2b1edc70..00f26b0e0a 100644 --- a/core-java-modules/core-java/pom.xml +++ b/core-java-modules/core-java/pom.xml @@ -61,6 +61,11 @@ moneta ${javamoney.moneta.version} + + org.springframework + spring-core + ${spring.core.version} + @@ -187,6 +192,7 @@ 3.0.0-M1 1.8 1.8 + 4.3.20.RELEASE \ No newline at end of file diff --git a/core-java-modules/core-java/src/main/java/com/baeldung/util/SerializationUtils.java b/core-java-modules/core-java/src/main/java/com/baeldung/util/SerializationUtils.java new file mode 100644 index 0000000000..eb5eb6aac1 --- /dev/null +++ b/core-java-modules/core-java/src/main/java/com/baeldung/util/SerializationUtils.java @@ -0,0 +1,29 @@ +package com.baeldung.util; + +import java.io.ByteArrayInputStream; +import java.io.ByteArrayOutputStream; +import java.io.IOException; +import java.io.ObjectInputStream; +import java.io.ObjectOutputStream; +import java.io.Serializable; + +public class SerializationUtils { + + public static byte[] serialize(T obj) + throws IOException { + ByteArrayOutputStream baos = new ByteArrayOutputStream(); + ObjectOutputStream oos = new ObjectOutputStream(baos); + oos.writeObject(obj); + oos.close(); + return baos.toByteArray(); + } + + public static T deserialize(byte[] b, Class cl) + throws IOException, ClassNotFoundException { + ByteArrayInputStream bais = new ByteArrayInputStream(b); + ObjectInputStream ois = new ObjectInputStream(bais); + Object o = ois.readObject(); + return cl.cast(o); + } +} + diff --git a/core-java-modules/core-java/src/test/java/com/baeldung/serialization/SerializationUnitTest.java b/core-java-modules/core-java/src/test/java/com/baeldung/serialization/SerializationUnitTest.java new file mode 100644 index 0000000000..9be174e42d --- /dev/null +++ b/core-java-modules/core-java/src/test/java/com/baeldung/serialization/SerializationUnitTest.java @@ -0,0 +1,79 @@ +package com.baeldung.serialization; + +import static org.junit.Assert.assertTrue; + +import java.io.FileOutputStream; +import java.io.IOException; +import java.io.NotSerializableException; +import java.io.ObjectOutputStream; +import java.io.Serializable; + +import org.apache.commons.lang3.SerializationUtils; +import org.junit.Test; + +public class SerializationUnitTest { + + @Test(expected = NotSerializableException.class) + public void whenSerializing_ThenThrowsError() throws IOException { + Address address = new Address(); + address.setHouseNumber(10); + FileOutputStream fileOutputStream = new FileOutputStream("yofile.txt"); + try (ObjectOutputStream objectOutputStream = new ObjectOutputStream(fileOutputStream)) { + objectOutputStream.writeObject(address); + } + } + + @Test(expected = ClassCastException.class) + public void whenSerializingUsingApacheCommons_ThenThrowsError() { + Address address = new Address(); + address.setHouseNumber(10); + SerializationUtils.serialize((Serializable) address); + } + + @Test + public void whenSerializingAndDeserializingUsingApacheCommons_ThenObjectIsTheSame() { + Person p = new Person(); + p.setAge(20); + p.setName("Joe"); + byte[] serialize = SerializationUtils.serialize(p); + Person p2 = (Person) SerializationUtils.deserialize(serialize); + assertTrue(p2.getAge() == p.getAge()); + assertTrue(p2.getName().equals(p.getName())); + } + + @Test(expected = ClassCastException.class) + public void whenSerializingUsingSpringSerializationUtils_ThenThrowsError() { + Address address = new Address(); + address.setHouseNumber(10); + org.springframework.util.SerializationUtils.serialize((Serializable) address); + } + + @Test + public void whenSerializingAndDeserializingUsingSpringSerializationUtils_ThenObjectIsTheSame() { + Person p = new Person(); + p.setAge(20); + p.setName("Joe"); + byte[] serialize = org.springframework.util.SerializationUtils.serialize(p); + Person p2 = (Person) org.springframework.util.SerializationUtils.deserialize(serialize); + assertTrue(p2.getAge() == p.getAge()); + assertTrue(p2.getName().equals(p.getName())); + } + + @Test(expected = ClassCastException.class) + public void whenSerializingUsingCustomSerializationUtils_ThenThrowsError() throws IOException { + Address address = new Address(); + address.setHouseNumber(10); + com.baeldung.util.SerializationUtils.serialize((Serializable) address); + } + + @Test + public void whenSerializingAndDeserializingUsingCustomSerializationUtils_ThenObjectIsTheSame() throws IOException, ClassNotFoundException { + Person p = new Person(); + p.setAge(20); + p.setName("Joe"); + byte[] serialize = com.baeldung.util.SerializationUtils.serialize(p); + Person p2 = com.baeldung.util.SerializationUtils.deserialize(serialize, Person.class); + assertTrue(p2.getAge() == p.getAge()); + assertTrue(p2.getName().equals(p.getName())); + } +}