fastJson 详解_fastjson2如何控制集合换行

public class FastJson {
 
    static class Person{
        private String id;
        private String name;
        private int age;
 
        public Person(){
        }
 
        public Person(String id, String name, int age) {
            this.id = id;
            this.name = name;
            this.age = age;
        }
 
        public String getId() {
            return id;
        }
 
        public void setId(String 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;
        }
    }
 
    public static void main(String[] args) {
        method1();
        method2();
        method3();
        method4();
    }
 
    static void method1(){
        System.out.println("javaBean转化示例开始——————————————");
        Person person = new Person("1", "fastJson", 1);
        System.out.println(person);
        //这里将javabean转化为json字符串
        String jsonString = JSON.toJSONString(person);
        System.out.println(jsonString);
        //这里将json字符串转化为javabean对象
         person = JSON.parseObject(jsonString, Person.class);
        System.out.println(person.toString());
        System.out.println("javabean转化示例结束");
    }
 
    static void method2(){
        System.out.println("List<javabean>转化示例开始");
        Person person1 = new Person("1", "fastJson1", 1);
        Person person2 = new Person("2", "fastJson2", 2);
        ArrayList<Person> persons = new ArrayList<>();
        persons.add(person1);
        persons.add(person2);
        /*转化为json字符串*/
        System.out.println("转化为json字符串");
        String jsonString = JSON.toJSONString(persons);
        System.out.println("json字符串"+jsonString);
 
        //json字符串转化为list<javabean>对象
        List<Person> person = JSON.parseArray(jsonString, Person.class);
        System.out.println("输出整个对象"+ person);
        System.out.println("person1对象"+person.get(0).toString());
        System.out.println("person2对象"+person.get(1).toString());
    }
 
    static void method3(){
        System.out.println("List<String>转化开始");
        ArrayList<String> list = new ArrayList<>();
        list.add("fastjson1");
        list.add("fastjson2");
        list.add("fastjson3");
        String jsonString = JSON.toJSONString(list);
        System.out.println("输出json字符串"+jsonString);
        //解析json
        JSON.parseObject(jsonString,new TypeReference<List<String>>(){});
        System.out.println(list.get(0)+":"+list.get(1)+":"+list.get(2));
        System.out.println("List<String>转化示例结束");
    }
 
 
    static void method4(){
        System.out.println("list<map<String,Object>>转化正式开始");
        HashMap<String, Object> map = new HashMap<String,Object>();
        map.put("key1","value1");
        map.put("key2","value2");
        HashMap<String, Object> map2 = new HashMap<String,Object>();
        map.put("key1",1);
        map.put("key2",11);
        ArrayList<Map<String, Object>> list = new ArrayList<Map<String, Object>>();
        list.add(map);
        list.add(map2);
        String jsonString = JSON.toJSONString(list);
        System.out.println("json字符串"+jsonString);
        //解析json字符串
        List<Map<String, Object>> list2 = JSON.parseObject(jsonString, new TypeReference<List<Map<String, Object>>>() {
        });
        System.out.println("map的key1值"+list2.get(0).get("key1"));
        System.out.println("map的key2值"+list2.get(0).get("key2"));
        System.out.println("ma2p的key1值"+list2.get(1).get("key1"));
        System.out.println("map2的key2值"+list2.get(1).get("key2"));
    }
 
 
}