做房产抵押网站需要什么手续费,商业网页设计培训,注册公司需要钱吗,外贸网站模板有什么用以下总结一下java转JSON串的几种方式#xff1a;
1、将java对象转成json串
2、通过JSONObject生成json串
3、通过json字符串生成json串
代码通过阿里的fastjson包实现。
代码如下#xff1a;
1、Person类#xff0c;包含Crad的List
package com.doit8.test.jsontest.…以下总结一下java转JSON串的几种方式
1、将java对象转成json串
2、通过JSONObject生成json串
3、通过json字符串生成json串
代码通过阿里的fastjson包实现。
代码如下
1、Person类包含Crad的List
package com.doit8.test.jsontest.pojo;
import java.util.ArrayList;
import java.util.List;
public class Person {
private String username;
private String email;
private String sex;
private int age;
private List cardListnew ArrayList();
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username username;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email email;
}
public String getSex() {
return sex;
}
public void setSex(String sex) {
this.sex sex;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age age;
}
public List getCardList() {
return cardList;
}
public void setCardList(List cardList) {
this.cardList cardList;
}
}
2、Card类
package com.doit8.test.jsontest.pojo;
public class Card {
private String cardName;
private String cardCode;
private Integer cardValue;
public String getCardName() {
return cardName;
}
public void setCardName(String cardName) {
this.cardName cardName;
}
public String getCardCode() {
return cardCode;
}
public void setCardCode(String cardCode) {
this.cardCode cardCode;
}
public Integer getCardValue() {
return cardValue;
}
public void setCardValue(Integer cardValue) {
this.cardValue cardValue;
}
}
3、JSON处理测试类
package com.doit8.test.jsontest;
import java.util.ArrayList;
import java.util.List;
import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;
import com.doit8.test.jsontest.pojo.Card;
import com.doit8.test.jsontest.pojo.Person;
/**
* JSON转换
*
*/ public class App
{
public static void main( String[] args )
{
//1。通过对象生成JSON串对象里包含对象数组转成JSON串。
Person personnew Person();
person.setUsername(xiejava);
person.setSex(man);
person.setAge(38);
person.setEmail(xiejavaishareread.com);
Card card1new Card();
card1.setCardName(bankCard1);
card1.setCardCode(888888888);
card1.setCardValue(99999999);
Card card2new Card();
card2.setCardName(bankCard1);
card2.setCardCode(999999999);
card2.setCardValue(222222222);
//对象数组
List cardsnew ArrayList();
cards.add(card1);
cards.add(card2);
person.setCardList(cards);
String json JSON.toJSON(person).toString();
System.out.println(json);
//2.通过JSON对象生成JSON串
JSONObject jObjectnew JSONObject();
jObject.put(username, xiejava);
jObject.put(sex, man);
jObject.put(age, 38);
jObject.put(email, xiejavaishareread.com);
//通过JSONArray包装对象数组
JSONArray jArraynew JSONArray();
jArray.addAll(cards);
jObject.put(cardList, jArray);
String json2jObject.toJSONString();
System.out.println(json2);
//3.通过JSON对象生成JSON串
JSONObject jObject2new JSONObject();
jObject2.put(username, xiejava);
jObject2.put(sex, man);
jObject2.put(age, 38);
jObject2.put(email, xiejavaishareread.com);
//构造JSON字符串
String cardjsonStr1{\cardName\:\bankCard1\,\cardCode\:\888888888\,\cardValue\:99999999};
String cardjsonStr2{\cardName\:\bankCard2\,\cardCode\:\999999999\,\cardValue\:222222222};
JSON.parseObject(cardjsonStr1);
JSONArray jArray2new JSONArray();
//将JSON字符串转成JSON对象加入到JSONArray[注意一定要用JSON.parseObject()方法转换成JSON对象否则还是字符串转成JSON串的时候会带双引号。]
jArray2.add(JSON.parseObject(cardjsonStr1));
jArray2.add(JSON.parseObject(cardjsonStr2));
jObject2.put(cardList, jArray2);
String json3jObject2.toJSONString();
System.out.println(json3);
}
}
pom.xml中引入fastjson包 com.alibabagroupId
fastjsonartifactId
1.2.15version
dependency
运行结果
{cardList:[{cardName:bankCard1,cardCode:888888888,cardValue:99999999},{cardName:bankCard1,cardCode:999999999,cardValue:222222222}],sex:man,age:38,email:xiejavaishareread.com,username:xiejava}
{cardList:[{cardCode:888888888,cardName:bankCard1,cardValue:99999999},{cardCode:999999999,cardName:bankCard1,cardValue:222222222}],sex:man,age:38,email:xiejavaishareread.com,username:xiejava}
{cardList:[{cardName:bankCard1,cardCode:888888888,cardValue:99999999},{cardName:bankCard2,cardCode:999999999,cardValue:222222222}],sex:man,age:38,email:xiejavaishareread.com,username:xiejava} 为了让学习变得轻松、高效今天给大家免费分享一套Java教学资源。帮助大家在成为Java架构师的道路上披荆斩棘。需要资料的欢迎加入学习交流群928505736
