jackson用法

ObjectMapper mapper=new ObjectMapper();
//3.調用mapper的writeValueAsString()方法把一個對象或集合轉爲json字符串
Customer customer=new Customer("aaa", "333");
String jsonStr=mapper.writeValueAsString(customer);
System.out.println(jsonStr);
//4.注意：jackson使用getter方法來定位json對象的屬性
//5.能夠經過添加註解JsonIgnore忽略某一個getter定義的屬性
List<Customer> customers=Arrays.asList(customer,new Customer("bb", "213"));
jsonStr=mapper.writeValueAsString(customers);
System.out.println(jsonStr);