jackson-databind ObjectMapper demo

App.java

package net.momoka;

import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;

import com.fasterxml.jackson.annotation.JsonAutoDetect;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.SerializationFeature;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * Hello world!
 * 
 */
public class App {

    private static final Logger LOGGER = LoggerFactory.getLogger(App.class);

    public static void main(String[] args) throws IOException {
        ObjectMapper om = new ObjectMapper();

        // om.disable(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES);
        om.configure(SerializationFeature.WRITE_NULL_MAP_VALUES, false);
        // om.setPropertyNamingStrategy(PropertyNamingStrategy.CAMEL_CASE_TO_LOWER_CASE_WITH_UNDERSCORES);

        Hello value = new Hello();
        value.setName("example");

        List<Hello> items = new ArrayList<Hello>();
        items.add(value);
        items.add(value);

        Result result = new Result();
        result.setItems(items);

        HashMap<String, Object> map = om.convertValue(result, HashMap.class);

        String obj = om.writeValueAsString(map);

        LOGGER.info("{}", obj);

    }

    @JsonAutoDetect
    static class Result {
        private List<Hello> items;
        private String status;

        public List<Hello> getItems() {
            return this.items;
        }

        public void setItems(List<Hello> items) {
            this.items = items;
        }

        public String getStatus() {
            return this.status;
        }
    }

    static class Hello {
        private String name;
        private Integer age;

        public String getName() {
            return name;
        }

        public void setName(String name) {
            this.name = name;
        }

        public Integer getAge() {
            return this.age;
        }
    }
}

pom.xml

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>net.momoka</groupId>
  <artifactId>hello</artifactId>
  <packaging>jar</packaging>
  <version>1.0</version>
  <name>hello</name>
  <url>http://maven.apache.org</url>
  <dependencies>
    <dependency>
      <groupId>com.fasterxml.jackson.core</groupId>
      <artifactId>jackson-databind</artifactId>
      <version>2.4.4</version>
    </dependency>
    <dependency>
      <groupId>org.codehaus.jackson</groupId>
      <artifactId>jackson-mapper-asl</artifactId>
      <version>1.9.13</version>
    </dependency>
    <dependency>
      <groupId>ch.qos.logback</groupId>
      <artifactId>logback-classic</artifactId>
      <version>1.1.2</version>
    </dependency>
    <dependency>
      <groupId>com.googlecode.json-simple</groupId>
      <artifactId>json-simple</artifactId>
      <version>1.1.1</version>
    </dependency>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>3.8.1</version>
      <scope>test</scope>
    </dependency>
  </dependencies>
</project>