fastjson之JSONArray的⽤法使⽤ fastjson-1.2.4.jar，⼀个解析json字符串jar包，由阿⾥巴巴⼯程师开发。
User.java
st.bean;
import java.util.List;
public class User {
private String name;
private int age;
fastjson怎么用
private List<String> habits;
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;
}
public List<String> getHabits() {
return habits;
}
public void setHabits(List<String> habits) {
this.habits = habits;
}
}
JSONArrayTest.java
st.json;
import java.util.ArrayList;
import java.util.List;
import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONArray;
st.bean.User;
public class JSONArrayTest {
public static void main(String[] args) {
User user1 = new User();
user1.setName("张三");
user1.setAge(18);
List<String> habits1 = new ArrayList<String>();
habits1.add("抽烟");
habits1.add("喝酒");
user1.setHabits(habits1);
User user2 = new User();
user2.setName("李四");
user2.setAge(18);
List<String> habits2 = new ArrayList<String>();
habits2.add("打牌");
habits2.add("唱歌");
user2.setHabits(habits2);
List<User> users=new ArrayList<User>();
users.add(user1);
users.add(user2);
JSONArray jsonArray=new JSONArray();//1、创建JSONArray
jsonArray.addAll(users);//2、把JSONArray添加List,List<User>转JSONArray，同时也可以是Map，Set等集合
System.out.(0));//输出结果|st.bean.User@14ae5a5
System.out.(1));//输出结果|st.bean.User@7f31245a
System.out.println("姓名："+(((0)).getName());//输出结果|姓名：张三
System.out.println("爱好："+(((1)).getHabits());//输出结果|爱好：[打牌, 唱歌]
String JSONString();//3、JSONArray转化json字符串
System.out.println(jsonStr);//输出结果|[{"age":18,"habits":["抽烟","喝酒"],"name":"张三"},{"age":18,"habits":["抽烟","喝酒"],"name":"张三"}]        users=JSON.parseArray(jsonStr, User.class);//json字符串转List<User>
System.out.println(users);//输出结果 |[st.bean.User@16f65612, st.bean.User@311d617d]
}
}