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Java下常用JSON的使用以及性能比较
前言
最近在研究Java下各种JSON的使用情况
待处理的实体类
package com.jsonTest;
/**
* @author xiang.wei
* @create 2018/5/14 13:22
*/
public class Person {
private String code;
private int age;
public String getCode() {
return code;
}
public void setCode(String code) {
this.code = code;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
@Override
public String toString() {
return "Person{" +
"code='" + code + '\'' +
", age=" + age +
'}';
}
}
package com.jsonTest;
import java.util.List;
public class UserCenterSynModel implements java.io.Serializable{
private static final long serialVersionUID = 5910206870550619784L;
private String CUid;//主键id
private String COldUserName;//老的用户名或者是税号
private String CUsername;//用户名
private String ctexnum; //税号
private String CEmail;//邮箱--已验证的邮箱
private String CAccountBlank;
private String CAddress;
private List<Person> personList; //关联用户
public String getCUid() {
return CUid;
}
public void setCUid(String CUid) {
this.CUid = CUid;
}
public String getCOldUserName() {
return COldUserName;
}
public void setCOldUserName(String COldUserName) {
this.COldUserName = COldUserName;
}
public String getCUsername() {
return CUsername;
}
public void setCUsername(String CUsername) {
this.CUsername = CUsername;
}
public String getCtexnum() {
return ctexnum;
}
public void setCtexnum(String ctexnum) {
this.ctexnum = ctexnum;
}
public String getCEmail() {
return CEmail;
}
public void setCEmail(String CEmail) {
this.CEmail = CEmail;
}
public String getCAccountBlank() {
return CAccountBlank;
}
public void setCAccountBlank(String CAccountBlank) {
this.CAccountBlank = CAccountBlank;
}
public String getCAddress() {
return CAddress;
}
public void setCAddress(String CAddress) {
this.CAddress = CAddress;
}
public List<Person> getPersonList() {
return personList;
}
public void setPersonList(List<Person> personList) {
this.personList = personList;
}
@Override
public String toString() {
return "UserCenterSynModel{" +
"CUid='" + CUid + '\'' +
", COldUserName='" + COldUserName + '\'' +
", CUsername='" + CUsername + '\'' +
", ctexnum='" + ctexnum + '\'' +
", CEmail='" + CEmail + '\'' +
", CAccountBlank='" + CAccountBlank + '\'' +
", CAddress='" + CAddress + '\'' +
", personList=" + personList +
'}';
}
}
fastJSON
作为阿里的一块JSON序列化和反序列化的工具，fastJSON还是很好用的
添加依赖
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>fastjson</artifactId>
<version>1.2.8</version>
</dependency>
测试代码
public class FastJSONTest {
public static void main(String[] args) {
UserCenterSynModel userCenterSynModel = new UserCenterSynModel();
userCenterSynModel.setCAccountBlank("测试银行");
userCenterSynModel.setCAddress("测试地址");
userCenterSynModel.setCEmail("邮箱");
userCenterSynModel.setCUid("11111");
userCenterSynModel.setCtexnum("22222");
List<Person> peopleList = new ArrayList<>();
Person person1 = new Person();
person1.setCode("测试用户1");
person1.setAge(12);
peopleList.add(person1);
Person person2 = new Person();
person2.setCode("测试用户2");
person2.setAge(23);
peopleList.add(person2);
userCenterSynModel.setPersonList(peopleList);
String json = JSON.toJSONString(userCenterSynModel);
System.out.println("fastJSON序列化结果："+json);
System.out.println("fastJSON反序列化结果 :"+JSON.parseObject(json,UserCenterSynModel.class));
}
}
测试结果：
fastJSON序列化结果：{"cAccountBlank":"测试银行","cAddress":"测试地址","cEmail":"邮箱","cUid":"11111","ctexnum":"22222","personList":[{"age":12,"code":"测试用户1"},{"age":23,"code":"测试用户2"}]}
fastJSON反序列化结果 :UserCenterSynModel{CUid='11111', COldUserName='null', CUsername='null', ctexnum='22222', CEmail='邮箱', CAccountBlank='测试银行', CAddress='测试地址', personList=[Person{code='测试用户1', age=12}, Person{code='测试用户2', age=23}]}
Gson
添加依赖
<dependency>
<groupId>com.google.code.gson</groupId>
<artifactId>gson</artifactId>
<version>2.3.1</version>
</dependency>
测试代码
public class GsonTest {
public static void main(String[] args) {
UserCenterSynModel userCenterSynModel = new UserCenterSynModel();
userCenterSynModel.setCAccountBlank("测试银行");
userCenterSynModel.setCAddress("测试地址");
userCenterSynModel.setCEmail("邮箱");
userCenterSynModel.setCUid("11111");
userCenterSynModel.setCtexnum("22222");
List<Person> peopleList = new ArrayList<>();
Person person1 = new Person();
person1.setCode("测试用户1");
person1.setAge(12);
peopleList.add(person1);
Person person2 = new Person();
person2.setCode("测试用户2");
person2.setAge(23);
peopleList.add(person2);
userCenterSynModel.setPersonList(peopleList);
//序列化
Gson gson = new Gson();
String jsonStr=gson.toJson(userCenterSynModel);
System.out.println(jsonStr);
//反序列化
UserCenterSynModel userCenterSynModel1 = gson.fromJson(jsonStr, UserCenterSynModel.class);
System.out.println(userCenterSynModel1);
}
}
测试结果
Gson序列化结果：{"CUid":"11111","ctexnum":"22222","CEmail":"邮箱","CAccountBlank":"测试银行","CAddress":"测试地址","personList":[{"code":"测试用户1","age":12},{"code":"测试用户2","age":23}]}
Gson反序列化结果：UserCenterSynModel{CUid='11111', COldUserName='null', CUsername='null', ctexnum='22222', CEmail='邮箱', CAccountBlank='测试银行', CAddress='测试地址', personList=[Person{code='测试用户1', age=12}, Person{code='测试用户2', age=23}]}
Jackson
添加依赖
<!--jackson的使用-->
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.7.0</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-annotations</artifactId>
<version>2.7.0</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-core</artifactId>
<version>2.7.0</version>
</dependency>
测试代码
public class JacksonTest {
public static void main(String[] args) throws IOException {
UserCenterSynModel userCenterSynModel = new UserCenterSynModel();
userCenterSynModel.setCAccountBlank("测试银行");
userCenterSynModel.setCAddress("测试地址");
userCenterSynModel.setCEmail("邮箱");
userCenterSynModel.setCUid("11111");
userCenterSynModel.setCtexnum("22222");
List<Person> peopleList = new ArrayList<>();
Person person1 = new Person();
person1.setCode("测试用户1");
person1.setAge(12);
peopleList.add(person1);
Person person2 = new Person();
person2.setCode("测试用户2");
person2.setAge(23);
peopleList.add(person2);
userCenterSynModel.setPersonList(peopleList);
//序列化
ObjectMapper objectMapper = new ObjectMapper();
String json = objectMapper.writeValueAsString(userCenterSynModel);
System.out.println(json);
//反序列化
ObjectMapper mapper = new ObjectMapper();
UserCenterSynModel user = mapper.readValue(json, UserCenterSynModel.class);
System.out.println(user);
}
}
测试结果
Jackson 序列化结果：{"ctexnum":"22222","personList":[{"code":"测试用户1","age":12},{"code":"测试用户2","age":23}],"caddress":"测试地址","cemail":"邮箱","coldUserName":null,"cusername":null,"cuid":"11111","caccountBlank":"测试银行"}
Jackson反序列化结果：UserCenterSynModel{CUid='11111', COldUserName='null', CUsername='null', ctexnum='22222', CEmail='邮箱', CAccountBlank='测试银行', CAddress='测试地址', personList=[Person{code='测试用户1', age=12}, Person{code='测试用户2', age=23}]}
json-lib
添加依赖
<!--json-lib的使用-->
<dependency>
<groupId>net.sf.json-lib</groupId>
<artifactId>json-lib</artifactId>
<version>2.4</version>
<classifier>jdk15</classifier>
</dependency>
测试代码
public class NetJSONTest {
public static void main(String[] args) {
UserCenterSynModel userCenterSynModel = new UserCenterSynModel();
userCenterSynModel.setCAccountBlank("测试银行");
userCenterSynModel.setCAddress("测试地址");
userCenterSynModel.setCEmail("邮箱");
userCenterSynModel.setCUid("11111");
userCenterSynModel.setCtexnum("22222");
List<Person> peopleList = new ArrayList<>();
Person person1 = new Person();
person1.setCode("测试用户1");
person1.setAge(12);
peopleList.add(person1);
Person person2 = new Person();
person2.setCode("测试用户2");
person2.setAge(23);
peopleList.add(person2);
userCenterSynModel.setPersonList(peopleList);
JSONObject jsonObject = JSONObject.fromObject(userCenterSynModel);
System.out.println("json-lib序列化结果：" + jsonObject.toString());
UserCenterSynModel userCenterSynModel1 = (UserCenterSynModel) JSONObject.toBean(jsonObject, UserCenterSynModel.class);
System.out.println("json-lib反序列化结果："+userCenterSynModel1);
}
}
测试结果
json-lib序列化结果：{"CAccountBlank":"测试银行","CAddress":"测试地址","CEmail":"邮箱","COldUserName":"","CUid":"11111","CUsername":"","ctexnum":"22222","personList":[{"age":12,"code":"测试用户1"},{"age":23,"code":"测试用户2"}]}
json-lib反序列化结果：UserCenterSynModel{CUid='11111', COldUserName='', CUsername='', ctexnum='22222', CEmail='邮箱', CAccountBlank='测试银行', CAddress='测试地址', personList=[net.sf.ezmorph.bean.MorphDynaBean@490d6c15[
{code=测试用户1, age=12}
], net.sf.ezmorph.bean.MorphDynaBean@7d4793a8[
{code=测试用户2, age=23}
]]}
性能比较
请参考：https://blog.csdn.net/vickyway/article/details/48157819
作者：码农飞哥
微信公众号：码农飞哥
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