对象转json字符串案例

测试对象与json字符串的转换

json字符串转对象

Stringstr = "{\"id\":\"1001\",\"name\":\"Java入门\",\"price\":19.88,\"pnum\":100,\"category\":\"IT\",\"description\":\"Good Book\"}";

System.out.println(str);

//创建 "对象映射" 对象

ObjectMapper mapper = new ObjectMapper();

Book book = mapper.readValue(str, Book.class);

System.out.println(book);