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    <p>Here's a simple test I used at some point to understand how Jackson serializes/deserializes JSON arrays and objects:</p> <pre><code>import java.io.IOException; import java.util.ArrayList; import java.util.List; import org.codehaus.jackson.JsonGenerationException; import org.codehaus.jackson.map.JsonMappingException; import org.codehaus.jackson.map.ObjectMapper; import org.codehaus.jackson.type.TypeReference; import org.junit.Test; import static org.junit.Assert.assertEquals; public class JacksonTest { private final ObjectMapper mapper = new ObjectMapper(); public static class Book { public String title; public String author; } @Test public void readWriteJsonObject() throws JsonGenerationException, JsonMappingException, IOException { String json = mapper.writeValueAsString(new Book() {{ title = "Real World Haskell"; author = "Don Stewart"; }}); Book book = mapper.readValue(json, Book.class); assertEquals("Real World Haskell", book.title); assertEquals("Don Stewart", book.author); } @Test @SuppressWarnings("serial") public void readWriteJsonArray() throws JsonGenerationException, JsonMappingException, IOException { List&lt;Book&gt; books = new ArrayList&lt;Book&gt;() {{ add(new Book() {{ title = "Real World Haskell"; author = "Don Stewart"; }}); add(new Book() {{ title = "Learn You Some Erlang"; author = "Fred T. Herbert"; }}); }}; String json = mapper.writeValueAsString(books); books = mapper.readValue(json, new TypeReference&lt;List&lt;Book&gt;&gt;() {}); assertEquals("Real World Haskell", books.get(0).title); assertEquals("Don Stewart", books.get(0).author); assertEquals("Learn You Some Erlang", books.get(1).title); assertEquals("Fred T. Herbert", books.get(1).author); } } </code></pre>
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