json数组和List转换

来源：互联网发布：汉堡王必点知乎编辑：程序博客网时间：2024/05/16 11:39

使用的是json-lib.jar包

将json格式的字符数组转为List对象

package hb;import java.util.Date;public class Person {String id;int age;String name;Date birthday;public String getId() {return id;}public void setId(String id) {this.id = id;}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;}public Date getBirthday() {return birthday;}public void setBirthday(Date birthday) {this.birthday = birthday;}}

package hb;import java.util.Iterator;import java.util.List;import org.junit.Test;import net.sf.json.JSONArray;import net.sf.json.JsonConfig;public class JsonToList {public static void main(String[] args) {String json="[{'name':'huangbiao','age':15},{'name':'liumei','age':14}]";JSONArray jsonarray = JSONArray.fromObject(json);System.out.println(jsonarray);List list = (List)JSONArray.toCollection(jsonarray, Person.class);Iterator it = list.iterator();while(it.hasNext()){Person p = (Person)it.next();System.out.println(p.getAge());}}@Testpublic void jsonToList1(){String json="[{'name':'huangbiao','age':15},{'name':'liumei','age':14}]";JSONArray jsonarray = JSONArray.fromObject(json);System.out.println(jsonarray);List list = (List)JSONArray.toList(jsonarray, Person.class);Iterator it = list.iterator();while(it.hasNext()){Person p = (Person)it.next();System.out.println(p.getAge());}}@Testpublic void jsonToList2(){String json="[{'name':'huangbiao','age':15},{'name':'liumei','age':14}]";JSONArray jsonarray = JSONArray.fromObject(json);System.out.println(jsonarray);System.out.println("------------");List list = (List)JSONArray.toList(jsonarray, new Person(), new JsonConfig());Iterator it = list.iterator();while(it.hasNext()){Person p = (Person)it.next();System.out.println(p.getAge());}}}

将list对象转为JSON字符串数组

package hb;import java.util.LinkedList;import java.util.List;import net.sf.json.JSONArray;public class ListToJson {public static void main(String[] args) {List list = new LinkedList();for(int i=0;i<3;i++){Person p = new Person();p.setAge(i);p.setName("name"+i);list.add(p);}JSONArray jsonarray = JSONArray.fromObject(list);System.out.println(jsonarray);}}

打印结果

[{"age":0,"birthday":null,"id":"","name":"name0"},{"age":1,"birthday":null,"id":"","name":"name1"},{"age":2,"birthday":null,"id":"","name":"name2"}]

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