Java笔记-FastJson中JsonObject、JsonArray和JsonStr和JavaBean之间的互相转化 Java笔记-FastJson中JsonObject、Js

FastJson是阿里开源的JSON库

Maven引入包依赖

com.alibaba fastjson 1.2.37

JSONObject
【Java笔记-FastJson中JsonObject、JsonArray和JsonStr和JavaBean之间的互相转化】相互转化关系图

文章图片

JavaBean

public class Person { private int age; private String name; public int getAge() {return age; } public void setAge(int age) {this.age = age; } public String getName() {return name; } public void setName(String name) {this.name = name; } }

JSONStr

{"age":20,"name":"xiaoming"}

JSONObject

{ "age": 20, "name": "xiaoming", }

Demo

JSONObject转JSONStr

public void test() { JSONObject object = new JSONObject(); object.put("age", 20); object.put("name", "xiaoming"); String str = JSON.toJSONString(object); }

JSONStr转JSONObject

public void test() { String str = "{\"sex\":\"male\",\"name\":\"xiaoming\",\"age\":20}"; JSONObject object = JSON.parseObject(str); }

JSONStr转JavaBean

public void test() { String str = "{\"sex\":\"male\",\"name\":\"xiaoming\",\"age\":20}"; Person person = JSON.parseObject(str, Person.class); }

JavaBean转JSONStr

public void test() { Person person = new Person(20, "xiaoming"); String str = JSON.toJSONString(person); }

JavaBean转JSONObject

public void test() { Person person = new Person(20, "xiaoming"); JSONObject object = (JSONObject) JSON.toJSON(person); }

JSONArray
相互转化关系图

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JavaBean

public class Person { private int age; private String name; public int getAge() {return age; } public void setAge(int age) {this.age = age; } public String getName() {return name; } public void setName(String name) {this.name = name; } }

JSONStr

[{"name":"xiaohua","age":18},{"name":"xiaoming","age":20}]

JSONArray

[ { "name": "xiaohua", "age": 18 }, { "name": "xiaoming", "age": 20 } ]

Demo

JSONArray转JSONStr

public void test() { JSONObject object1 = new JSONObject(); object1.put("age", 20); object1.put("name", "xiaoming"); JSONObject object2 = new JSONObject(); object2.put("age", 18); object2.put("name", "xiaohua"); JSONArray array = new JSONArray(); array.add(object1); array.add(object2); String str = JSON.toJSONString(array); }

JSONStr转JSONArray

public void test() { String str = "[{\"name\":\"xiaoming\",\"age\":20},{\"name\":\"xiaohua\",\"age\":18}]"; JSONArray array = JSON.parseArray(str); }

JSONStr转JavaBean-List

public void test() { String str = "[{\"name\":\"xiaoming\",\"age\":20},{\"name\":\"xiaohua\",\"age\":18}]"; List personList = JSON.parseArray(str, Person.class); }

JavaBean-List转JSONStr

public void test() { Person person1 = new Person(18, "xiaohua"); Person person2 = new Person(20, "xiaoming"); List personList = new ArrayList<>(); personList.add(person1); personList.add(person2); String str = JSON.toJSONString(personList); }

JavaBean-List转JSONArray

public void test() { Person person1 = new Person(18, "xiaohua"); Person person2 = new Person(20, "xiaoming"); List personList = new ArrayList<>(); personList.add(person1); personList.add(person2); JSONArray array = (JSONArray) JSON.toJSON(personList); }