JSON(JavaScript Object Notation)是一種輕量級的數(shù)據(jù)交換格式，在前后端數(shù)據(jù)交互中得到廣泛應(yīng)用。Java中可以通過工具類或者手動方式實現(xiàn)JSON和Java對象之間的轉(zhuǎn)換。

將Java對象轉(zhuǎn)換成JSON格式：

//導(dǎo)入Jackson庫
import com.fasterxml.jackson.databind.ObjectMapper;
public class Student {
private String name;
private Integer age;
private String[] hobbies;
//省略getter、setter方法
}
//將Student對象轉(zhuǎn)成JSON格式的字符串
ObjectMapper objectMapper = new ObjectMapper();
Student student = new Student();
student.setName("張三");
student.setAge(18);
student.setHobbies(new String[]{"游泳","閱讀"});
String jsonString = objectMapper.writeValueAsString(student);
System.out.println(jsonString);

將JSON格式字符串轉(zhuǎn)換成Java對象：

//將JSON格式字符串轉(zhuǎn)成Student對象
ObjectMapper objectMapper = new ObjectMapper();
String jsonString = "{\"name\":\"張三\",\"age\":18,\"hobbies\":[\"游泳\",\"閱讀\"]}";
Student student = objectMapper.readValue(jsonString, Student.class);
System.out.println(student.getName());
System.out.println(student.getAge());
System.out.println(Arrays.toString(student.getHobbies()));

以上代碼演示了將Java對象轉(zhuǎn)換成JSON格式字符串以及將JSON格式字符串轉(zhuǎn)換成Java對象的過程。需要注意的是，在使用Jackson庫進行JSON和Java對象轉(zhuǎn)換時，Java對象需要具備getter、setter方法。