【FastJson入门】简单使用 - 对象、集合、json对象、json数组之间互转

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项目导入依赖： 

<dependency>
    <groupId>com.alibaba</groupId>
    <artifactId>fastjson</artifactId>
    <version>1.1.30</version>
</dependency>

测试：

public class FastJsonTest {
    //对象转换为json字符串,json字符串转换java对象
    //JSONObject/JSONArray.toJSONString JSONObject.parseObject  JSONArray.parseArray
    @Test
    public void test() throws Exception {
        Person zs = new Person(1L, "zs");
        //单个对象 --> json对象
        String jsonObj = JSONObject.toJSONString(zs);
        System.out.println(jsonObj);
        //集合 --> json数组
        String jsonArray = JSONArray.toJSONString(Arrays.asList(zs, zs,new Person(2L, "ls")));
        System.out.println(jsonArray);

        //json对象 --> 单个对象
        Person person = JSONObject.parseObject(jsonObj, Person.class);
        System.out.println(person);
        //json数组 --> 集合
        List<Person> persons = JSONArray.parseArray(jsonArray, Person.class);
        System.out.println(persons);
    }
}

public class Person {
    private Long id;
    private String name;
    public Person() {  }
    //getter/setter方法+toString方法...
}

 运行结果：