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Jackson VS FastJson VS Gson
package com.dj.json.model;
import java.util.Date;
import java.util.List;
import java.util.Map;
public class People {
private String name;
private FullName fullName;
private int age;
private Date birthday;
private List<String> hobbies;
private Map<String, String> clothes;
private List<People> friends;
// auto get set
}
public class FullName {
private String firstName;
private String middleName;
private String lastName;
// auto get set
}
package com.dj.json.utils.fastjson;
import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.serializer.SerializerFeature;
public class FastJsonUtils {
public static String bean2Json(Object obj) {
return JSON.toJSONString(obj);
}
public static String bean2Json(Object obj,String dateFormat) {
return JSON.toJSONStringWithDateFormat(obj, dateFormat, SerializerFeature.PrettyFormat);
}
public static <T> T json2Bean(String jsonStr, Class<T> objClass) {
return JSON.parseObject(jsonStr, objClass);
}
}
public class GsonUtils {
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);
String prettyJsonString = gson.toJson(je);
return prettyJsonString;
}
}
package com.dj.json.utils.jackson;
import java.nio.charset.Charset;
import java.text.SimpleDateFormat;
import java.util.concurrent.ConcurrentLinkedQueue;
import org.apache.commons.lang.StringUtils;
import org.codehaus.jackson.map.DeserializationConfig;
import org.codehaus.jackson.map.ObjectMapper;
import org.codehaus.jackson.map.ser.StdSerializerProvider;
import org.codehaus.jackson.map.ser.impl.SimpleBeanPropertyFilter;
import org.codehaus.jackson.map.ser.impl.SimpleFilterProvider;
import org.codehaus.jackson.map.ser.std.NullSerializer;
import org.codehaus.jackson.type.TypeReference;
/**
* @description: jsonUtils 工具类
* @version Ver 1.0
* @author <a href="mailto:zuiwoxing@qq.com">dejianliu</a>
* @Date 2013-4-23 下午12:32:29
*/
public class JsonUtils {
private static final Charset DEFAULT_CHARSET = Charset.forName("UTF-8");
static boolean isPretty = false;
private static final String DEFAULT_DATE_FORMAT = "yyyy-MM-dd HH:mm:ss";
static StdSerializerProvider sp = new StdSerializerProvider();
static {
sp.setNullValueSerializer(NullSerializer.instance);
}
static SimpleDateFormat defaultDateFormat = new SimpleDateFormat(DEFAULT_DATE_FORMAT);
public static ConcurrentLinkedQueue<ObjectMapper> mapperQueue = new ConcurrentLinkedQueue<ObjectMapper>();
public static ObjectMapper getObjectMapper() {
ObjectMapper mapper = mapperQueue.poll();
if(mapper == null) {
mapper = new ObjectMapper(null, sp, null);
}
return mapper;
}
public static void returnMapper(ObjectMapper mapper) {
if(mapper != null) {
mapperQueue.offer(mapper);
}
}
public static boolean isPretty() {
return isPretty;
}
public static void setPretty(boolean isPretty) {
JsonUtils.isPretty = isPretty;
}
/**
* JSON串转换为Java泛型对象，可以是各种类型，此方法最为强大。用法看测试用例。
*
* @param <T>
* @param jsonString
* JSON字符串
* @param tr
* TypeReference,例如: new TypeReference< List<FamousUser> >(){}
* @return List对象列表
*/
@SuppressWarnings("unchecked")
public static <T> T json2GenericObject(String jsonString,TypeReference<T> tr, String dateFormat) {
if (StringUtils.isNotEmpty(jsonString)) {
ObjectMapper mapper = getObjectMapper();
try {
// ObjectMapper objectMapper = new ObjectMapper(null, sp, null);
mapper.disable(DeserializationConfig.Feature.FAIL_ON_UNKNOWN_PROPERTIES);
if (StringUtils.isBlank(dateFormat)) {
mapper.setDateFormat(defaultDateFormat);
} else {
SimpleDateFormat sdf = (SimpleDateFormat) defaultDateFormat.clone();
sdf.applyPattern(dateFormat);
mapper.setDateFormat(sdf);
}
return (T) mapper.readValue(jsonString, tr);
} catch (Exception e) {
e.printStackTrace();
} finally {
returnMapper(mapper);
}
}
return null;
}
/**
* Json字符串转Java对象
*
* @param jsonString
* @param c
* @return
*/
public static <T> T json2Object(String jsonString, Class<T> c,String dateFormat) {
if (StringUtils.isNotEmpty(jsonString)) {
ObjectMapper mapper = getObjectMapper();
try {
// ObjectMapper objectMapper = new ObjectMapper(null, sp, null);
mapper.disable(DeserializationConfig.Feature.FAIL_ON_UNKNOWN_PROPERTIES);
if (StringUtils.isBlank(dateFormat)) {
mapper.setDateFormat(defaultDateFormat);
} else {
SimpleDateFormat sdf = (SimpleDateFormat) defaultDateFormat.clone();
sdf.applyPattern(dateFormat);
mapper.setDateFormat(sdf);
}
return (T)mapper.readValue(jsonString, c);
} catch (Exception e) {
e.printStackTrace();
} finally {
returnMapper(mapper);
}
}
return null;
}
/**
* Java对象转Json字符串
*
* @param object
* 目标对象
* @param executeFields
* 排除字段
* @param includeFields
* 包含字段
* @param dateFormat
* 时间格式化
* @param isPretty
* 是否格式化打印 default false
* @return
*/
public static String toJson(Object object, String[] executeFields,
String[] includeFields, String dateFormat) {
String jsonString = "";
ObjectMapper mapper = getObjectMapper();
try {
BidBeanSerializerFactory bidBeanFactory = BidBeanSerializerFactory.instance;
if (StringUtils.isBlank(dateFormat)) {
mapper.setDateFormat(defaultDateFormat);
} else {
SimpleDateFormat sdf = (SimpleDateFormat) defaultDateFormat.clone();
sdf.applyPattern(dateFormat);
mapper.setDateFormat(sdf);
}
if (includeFields != null) {
String filterId = "includeFilter";
mapper.setFilters(new SimpleFilterProvider().addFilter(
filterId, SimpleBeanPropertyFilter
.filterOutAllExcept(includeFields)));
bidBeanFactory.setFilterId(filterId);
mapper.setSerializerFactory(bidBeanFactory);
} else if (includeFields == null && executeFields != null) {
String filterId = "executeFilter";
mapper.setFilters(new SimpleFilterProvider().addFilter(
filterId, SimpleBeanPropertyFilter
.serializeAllExcept(executeFields)));
bidBeanFactory.setFilterId(filterId);
mapper.setSerializerFactory(bidBeanFactory);
}
if (isPretty) {
jsonString = mapper.writerWithDefaultPrettyPrinter()
.writeValueAsString(object);
} else {
jsonString = mapper.writeValueAsString(object);
}
} catch (Exception e) {
e.printStackTrace();
} finally {
returnMapper(mapper);
}
return jsonString;
}
}
package com.dj.json.test;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import com.dj.json.model.FullName;
import com.dj.json.model.People;
import com.dj.json.utils.fastjson.FastJsonUtils;
import com.dj.json.utils.jackson.JacksonUtils;
import com.dj.json.utils.jackson.JsonUtils;
/**
*GSON 序列化:1000000 笔数据 cost :21587 毫秒 平均:46324.176587761154 笔/秒
*JACKSON 序列化:1000000 笔数据 cost :9284 毫秒 平均:107712.19302024988 笔/秒
*FastJSON 序列化:1000000 笔数据 cost :9180 毫秒 平均:108932.46187363834 笔/秒
* @version : Ver 1.0
* @author : <a href="mailto:dejianliu@ebnew.com">liudejian</a>
* @date : 2014-12-10 上午10:50:27
*/
public class JsonSer {
private static People p;
private static int num = 1000000;
private static People createAPeople(String name, List<People> friends) {
People newPeople = new People();
newPeople.setName(name);
newPeople.setFullName(new FullName("xxx_first", "xxx_middle",
"xxx_last"));
newPeople.setAge(24);
List<String> hobbies = new ArrayList<String>();
hobbies.add("篮球");
hobbies.add("游泳");
hobbies.add("coding");
newPeople.setHobbies(hobbies);
Map<String, String> clothes = new HashMap<String, String>();
clothes.put("coat", "Nike");
clothes.put("trousers", "adidas");
clothes.put("shoes", "安踏");
newPeople.setClothes(clothes);
newPeople.setFriends(friends);
return newPeople;
}
public static void main(String[] args) throws Exception {
List<People> friends = new ArrayList<People>();
friends.add(createAPeople("小明", null));
friends.add(createAPeople("Tony", null));
friends.add(createAPeople("陈小二", null));
p = createAPeople("邵同学", friends);
long startTime = System.currentTimeMillis();
for (int i = 0; i < num; i++) {
// GsonUtils.bean2Json(p);
// JacksonUtils.bean2Json(p);
JsonUtils.toJson(p,null, null, "yyyy-MM-dd");
// FastJsonUtils.bean2Json(p,"yyyy-MM-dd");
}
long endTime = System.currentTimeMillis();
long dif = endTime - startTime;
System.out.println("序列化:"
+ num
+ " 笔数据 cost :"
+ dif
+ " 毫秒 "
+ " 平均:"
+ (Double.valueOf(num)
/ Double.valueOf(Double.valueOf(dif) / 1000) + " 笔/秒"));
}
}
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import com.dj.json.model.FullName;
import com.dj.json.model.People;
import com.dj.json.utils.jackson.JsonUtils;
/**
*GSON 反序列化:1000000 笔数据 cost :21456 毫秒 平均:46607.00969425802 笔/秒
*JACKSON 反序列化:1000000 笔数据 cost :13362 毫秒 平均:74839.095943721 笔/秒
*FastJSON 反序列化:1000000 笔数据 cost :36814 毫秒 平均:27163.579073178684 笔/秒
* @version : Ver 1.0
* @author : <a href="mailto:dejianliu@ebnew.com">liudejian</a>
* @date : 2014-12-10 上午10:50:27
*/
public class JsonDesc {
private static People p;
private static int num = 1000000;
private static People createAPerson(String name, List<People> friends) {
People newPerson = new People();
newPerson.setName(name);
newPerson.setFullName(new FullName("xxx_first", "xxx_middle",
"xxx_last"));
newPerson.setAge(24);
List<String> hobbies = new ArrayList<String>();
hobbies.add("篮球");
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;
}
public static void main(String[] args) throws Exception {
List<People> friends = new ArrayList<People>();
friends.add(createAPerson("小明", null));
friends.add(createAPerson("Tony", null));
friends.add(createAPerson("陈小二", null));
p = createAPerson("邵同学", friends);
String jsonStr = JsonUtils.toJson(p, null, null, null);
System.out.println(jsonStr);
long startTime = System.currentTimeMillis();
for (int i = 0; i < num; i++) {
//// GsonUtils.json2Bean(jsonStr, People.class);
JsonUtils.json2Object(jsonStr, People.class, "yyyy-MM-dd");
// JacksonUtils.json2Bean(jsonStr, People.class);
// FastJsonUtils.json2Bean(jsonStr, People.class);
}
long endTime = System.currentTimeMillis();
long dif = endTime - startTime;
System.out.println("反序列化:"
+ num
+ " 笔数据 cost :"
+ dif
+ " 毫秒 "
+ " 平均:"
+ (Double.valueOf(num)
/ Double.valueOf(Double.valueOf(dif) / 1000) + " 笔/秒"));
}
}
Jackson VS FastJson VS Gson
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