Java幾種常用JSON庫性能比較詳解

<!-- Json libs-->
<dependency>
  <groupId>net.sf.json-lib</groupId>
  <artifactId>json-lib</artifactId>
  <version>2.4</version>
  <classifier>jdk15</classifier>
</dependency>
<dependency>
  <groupId>com.google.code.gson</groupId>
  <artifactId>gson</artifactId>
  <version>2.8.2</version>
</dependency>
<dependency>
  <groupId>com.alibaba</groupId>
  <artifactId>fastjson</artifactId>
  <version>1.2.46</version>
</dependency>
<dependency>
  <groupId>com.fasterxml.jackson.core</groupId>
  <artifactId>jackson-databind</artifactId>
  <version>2.9.4</version>
</dependency>
<dependency>
  <groupId>com.fasterxml.jackson.core</groupId>
  <artifactId>jackson-annotations</artifactId>
  <version>2.9.4</version>
</dependency>

public class FastJsonUtil {
  public static String bean2Json(Object obj) {
    return JSON.toJSONString(obj);
  }

  public static <T> T json2Bean(String jsonStr, Class<T> objClass) {
    return JSON.parseObject(jsonStr, objClass);
  }
}

public class GsonUtil {
  private static Gson gson = new GsonBuilder().create();

  public static String bean2Json(Object obj) {
    return gson.toJson(obj);
  }

  public static <T> T json2Bean(String jsonStr, Class<T> objClass) {
    return gson.fromJson(jsonStr, objClass);
  }

  public static String jsonFormatter(String uglyJsonStr) {
    Gson gson = new GsonBuilder().setPrettyPrinting().create();
    JsonParser jp = new JsonParser();
    JsonElement je = jp.parse(uglyJsonStr);
    return gson.toJson(je);
  }
}

public class JacksonUtil {
  private static ObjectMapper mapper = new ObjectMapper();

  public static String bean2Json(Object obj) {
    try {
      return mapper.writeValueAsString(obj);
    } catch (JsonProcessingException e) {
      e.printStackTrace();
      return null;
    }
  }

  public static <T> T json2Bean(String jsonStr, Class<T> objClass) {
    try {
      return mapper.readValue(jsonStr, objClass);
    } catch (IOException e) {
      e.printStackTrace();
      return null;
    }
  }
}

public class JsonLibUtil {

  public static String bean2Json(Object obj) {
    JSONObject jsonObject = JSONObject.fromObject(obj);
    return jsonObject.toString();
  }

  @SuppressWarnings("unchecked")
  public static <T> T json2Bean(String jsonStr, Class<T> objClass) {
    return (T) JSONObject.toBean(JSONObject.fromObject(jsonStr), objClass);
  }
}

public class Person {
  private String name;
  private FullName fullName;
  private int age;
  private Date birthday;
  private List<String> hobbies;
  private Map<String, String> clothes;
  private List<Person> friends;

  // getter/setter省略

  @Override
  public String toString() {
    StringBuilder str = new StringBuilder("Person [name=" + name + ", fullName=" + fullName + ", age="
        + age + ", birthday=" + birthday + ", hobbies=" + hobbies
        + ", clothes=" + clothes + "]\n");
    if (friends != null) {
      str.append("Friends:\n");
      for (Person f : friends) {
        str.append("\t").append(f);
      }
    }
    return str.toString();
  }

}

public class FullName {
  private String firstName;
  private String middleName;
  private String lastName;

  public FullName() {
  }

  public FullName(String firstName, String middleName, String lastName) {
    this.firstName = firstName;
    this.middleName = middleName;
    this.lastName = lastName;
  }

  // 省略getter和setter

  @Override
  public String toString() {
    return "[firstName=" + firstName + ", middleName="
        + middleName + ", lastName=" + lastName + "]";
  }
}

@BenchmarkMode(Mode.SingleShotTime)
@OutputTimeUnit(TimeUnit.SECONDS)
@State(Scope.Benchmark)
public class JsonSerializeBenchmark {
  /**
   * 序列化次數(shù)參數(shù)
   */
  @Param({"1000", "10000", "100000"})
  private int count;

  private Person p;

  public static void main(String[] args) throws Exception {
    Options opt = new OptionsBuilder()
        .include(JsonSerializeBenchmark.class.getSimpleName())
        .forks(1)
        .warmupIterations(0)
        .build();
    Collection<RunResult> results = new Runner(opt).run();
    ResultExporter.exportResult("JSON序列化性能", results, "count", "秒");
  }

  @Benchmark
  public void JsonLib() {
    for (int i = 0; i < count; i++) {
      JsonLibUtil.bean2Json(p);
    }
  }

  @Benchmark
  public void Gson() {
    for (int i = 0; i < count; i++) {
      GsonUtil.bean2Json(p);
    }
  }

  @Benchmark
  public void FastJson() {
    for (int i = 0; i < count; i++) {
      FastJsonUtil.bean2Json(p);
    }
  }

  @Benchmark
  public void Jackson() {
    for (int i = 0; i < count; i++) {
      JacksonUtil.bean2Json(p);
    }
  }

  @Setup
  public void prepare() {
    List<Person> friends=new ArrayList<Person>();
    friends.add(createAPerson("小明",null));
    friends.add(createAPerson("Tony",null));
    friends.add(createAPerson("陳小二",null));
    p=createAPerson("邵同學",friends);
  }

  @TearDown
  public void shutdown() {
  }

  private Person createAPerson(String name,List<Person> friends) {
    Person newPerson=new Person();
    newPerson.setName(name);
    newPerson.setFullName(new FullName("zjj_first", "zjj_middle", "zjj_last"));
    newPerson.setAge(24);
    List<String> hobbies=new ArrayList<String>();
    hobbies.add("籃球");
    hobbies.add("游泳");
    hobbies.add("coding");
    newPerson.setHobbies(hobbies);
    Map<String,String> clothes=new HashMap<String, String>();
    clothes.put("coat", "Nike");
    clothes.put("trousers", "adidas");
    clothes.put("shoes", "安踏");
    newPerson.setClothes(clothes);
    newPerson.setFriends(friends);
    return newPerson;
  }
}

ResultExporter.exportResult("JSON序列化性能", results, "count", "秒");

@BenchmarkMode(Mode.SingleShotTime)
@OutputTimeUnit(TimeUnit.SECONDS)
@State(Scope.Benchmark)
public class JsonDeserializeBenchmark {
  /**
   * 反序列化次數(shù)參數(shù)
   */
  @Param({"1000", "10000", "100000"})
  private int count;

  private String jsonStr;

  public static void main(String[] args) throws Exception {
    Options opt = new OptionsBuilder()
        .include(JsonDeserializeBenchmark.class.getSimpleName())
        .forks(1)
        .warmupIterations(0)
        .build();
    Collection<RunResult> results = new Runner(opt).run();
    ResultExporter.exportResult("JSON反序列化性能", results, "count", "秒");
  }

  @Benchmark
  public void JsonLib() {
    for (int i = 0; i < count; i++) {
      JsonLibUtil.json2Bean(jsonStr, Person.class);
    }
  }

  @Benchmark
  public void Gson() {
    for (int i = 0; i < count; i++) {
      GsonUtil.json2Bean(jsonStr, Person.class);
    }
  }

  @Benchmark
  public void FastJson() {
    for (int i = 0; i < count; i++) {
      FastJsonUtil.json2Bean(jsonStr, Person.class);
    }
  }

  @Benchmark
  public void Jackson() {
    for (int i = 0; i < count; i++) {
      JacksonUtil.json2Bean(jsonStr, Person.class);
    }
  }

  @Setup
  public void prepare() {
    jsonStr="{\"name\":\"邵同學\",\"fullName\":{\"firstName\":\"zjj_first\",\"middleName\":\"zjj_middle\",\"lastName\":\"zjj_last\"},\"age\":24,\"birthday\":null,\"hobbies\":[\"籃球\",\"游泳\",\"coding\"],\"clothes\":{\"shoes\":\"安踏\",\"trousers\":\"adidas\",\"coat\":\"Nike\"},\"friends\":[{\"name\":\"小明\",\"fullName\":{\"firstName\":\"xxx_first\",\"middleName\":\"xxx_middle\",\"lastName\":\"xxx_last\"},\"age\":24,\"birthday\":null,\"hobbies\":[\"籃球\",\"游泳\",\"coding\"],\"clothes\":{\"shoes\":\"安踏\",\"trousers\":\"adidas\",\"coat\":\"Nike\"},\"friends\":null},{\"name\":\"Tony\",\"fullName\":{\"firstName\":\"xxx_first\",\"middleName\":\"xxx_middle\",\"lastName\":\"xxx_last\"},\"age\":24,\"birthday\":null,\"hobbies\":[\"籃球\",\"游泳\",\"coding\"],\"clothes\":{\"shoes\":\"安踏\",\"trousers\":\"adidas\",\"coat\":\"Nike\"},\"friends\":null},{\"name\":\"陳小二\",\"fullName\":{\"firstName\":\"xxx_first\",\"middleName\":\"xxx_middle\",\"lastName\":\"xxx_last\"},\"age\":24,\"birthday\":null,\"hobbies\":[\"籃球\",\"游泳\",\"coding\"],\"clothes\":{\"shoes\":\"安踏\",\"trousers\":\"adidas\",\"coat\":\"Nike\"},\"friends\":null}]}";
  }

  @TearDown
  public void shutdown() {
  }
}