使用fastJSON

package com.ylchou.testfastjson;public class Person { private Student student; private Teacher teacher; public Student getStudent() {  return student; } public void setStudent(Student student) {  this.student = student; } public Teacher getTeacher() {  return teacher; } public void setTeacher(Teacher teacher) {  this.teacher = teacher; } }

 

package com.ylchou.testfastjson;public class Student {private int id;private String name;private int age;private Dog dog;public Dog getDog() {return dog;}public void setDog(Dog dog) {this.dog = dog;}public int getId() {return id;}public void setId(int id) {this.id = id;}public String getName() {return name;}public void setName(String name) {this.name = name;}public int getAge() {return age;}public void setAge(int age) {this.age = age;}}

 

package com.ylchou.testfastjson;public class Teacher {private int id;private String name;private int age;public int getId() {return id;}public void setId(int id) {this.id = id;}public String getName() {return name;}public void setName(String name) {this.name = name;}public int getAge() {return age;}public void setAge(int age) {this.age = age;}}

 

package com.ylchou.testfastjson;public class Dog { private int id; private String name; private int age;  public int getId() {  return id; } public void setId(int id) {  this.id = id; } public String getName() {  return name; } public void setName(String name) {  this.name = name; } public int getAge() {  return age; } public void setAge(int age) {  this.age = age; }}

package com.ylchou.testfastjson;public class Dog {private int id;private String name;private int age;public int getId() {return id;}public void setId(int id) {this.id = id;}public String getName() {return name;}public void setName(String name) {this.name = name;}public int getAge() {return age;}public void setAge(int age) {this.age = age;}}

 

package com.ylchou.testfastjson;import java.util.ArrayList;import java.util.HashMap;import java.util.HashSet;import java.util.List;import java.util.Map;import java.util.Set;import com.alibaba.fastjson.JSON;import com.alibaba.fastjson.JSONArray;public class TestFastJSON { public static void p(String str){  System.out.println(str); }  public static void main(String[] args) {  Long time1 = System.currentTimeMillis();    Student student = new Student();  Teacher teacher = new Teacher();  Person person = new Person();  Dog dog = new Dog();    student.setAge(12);  student.setId(001);  student.setName("ylchou");  student.setDog(dog);    teacher.setAge(25);  teacher.setId(007);  teacher.setName("lili");    person.setStudent(student);  person.setTeacher(teacher);    dog.setAge(2);  dog.setId(999);  dog.setName("小黄");    String studentJson = JSON.toJSONString(student, true);  String studentJson2 = JSON.toJSONString(student, false);  String studentJson3 = JSON.toJSONString(student);//默认为false  p("studentJson---------------------------------------");  p(studentJson);p("");  p("studentJson2---------------------------------------");  p(studentJson2);p("");  p("studentJson3---------------------------------------");  p(studentJson3);p("");    String teacherJson = JSON.toJSONString(teacher, true);  p("teacherJson---------------------------------------");  p(teacherJson);p("");    String personJson = JSON.toJSONString(person, true);  p("personJson---------------------------------------");  p(personJson);p("");    String dogJson = JSON.toJSONString(dog, true);  p("dogJson---------------------------------------");  p(dogJson);p("");    List<Object> list = new ArrayList<Object>();  list.add("ylchou");  list.add("lili");  list.add("小黄");  list.add(dog);  list.add(teacher);  list.add(student);//有问题  list.add(person);//有问题  String listJson = JSON.toJSONString(list, true);  p("listJson---------------------------------------");  p(listJson);p("");    Map<String,Object> map = new HashMap<String, Object>();  map.put("ylchou", "湖北");  map.put("小黄", dog);  String mapJson = JSON.toJSONString(map, true);  p("mapJson----------------------------------------");  p(mapJson);p("");    Set<Object> set = new HashSet<Object>();  set.add("ylcohu");  set.add(student);  set.add(person);  String setJson = JSON.toJSONString(set,true);  p("setJson----------------------------------------");  p(setJson);p("");    String mapToArray = JSONArray.toJSONString(map, true);  p("mapToArray----------------------------------------");  p(mapToArray);p("");    Long time2 = System.currentTimeMillis();  System.out.println("所用时间："+(time2-time1)+"毫秒"); }}

控制台打印结果：

studentJson---------------------------------------
{
 "age":12,
 "dog":{
  "age":2,
  "id":999,
  "name":"小黄"
 },
 "id":1,
 "name":"ylchou"
}

studentJson2---------------------------------------
{"age":12,"dog":{"age":2,"id":999,"name":"小黄"},"id":1,"name":"ylchou"}

studentJson3---------------------------------------
{"age":12,"dog":{"age":2,"id":999,"name":"小黄"},"id":1,"name":"ylchou"}

teacherJson---------------------------------------
{
 "age":25,
 "id":7,
 "name":"lili"
}

personJson---------------------------------------
{
 "student":{
  "age":12,
  "dog":{
   "age":2,
   "id":999,
   "name":"小黄"
  },
  "id":1,
  "name":"ylchou"
 },
 "teacher":{
  "age":25,
  "id":7,
  "name":"lili"
 }
}

dogJson---------------------------------------
{
 "age":2,
 "id":999,
 "name":"小黄"
}

listJson---------------------------------------
[
 "ylchou",
 "lili",
 "小黄",
 {
  "age":2,
  "id":999,
  "name":"小黄"
 },
 {
  "age":25,
  "id":7,
  "name":"lili"
 },
 {
  "age":12,
  "dog":{"$ref":"$[3]"},
  "id":1,
  "name":"ylchou"
 },
 {
  "student":{"$ref":"$[5]"},
  "teacher":{"$ref":"$[4]"}
 }
]

mapJson----------------------------------------
{"ylchou":"湖北","小黄":{
 "age":2,
 "id":999,
 "name":"小黄"
}}

setJson----------------------------------------
[{
 "student":{
  "age":12,
  "dog":{
   "age":2,
   "id":999,
   "name":"小黄"
  },
  "id":1,
  "name":"ylchou"
 },
 "teacher":{
  "age":25,
  "id":7,
  "name":"lili"
 }
},{"$ref":"$[0].student"},"ylcohu"]

mapToArray----------------------------------------
{"ylchou":"湖北","小黄":{
 "age":2,
 "id":999,
 "name":"小黄"
}}

所用时间：93毫秒