使用Jackson进行序列化和反序列化

╰半夏微凉° 2022-06-03 05:00 256阅读 0赞

序列化：

public static <T> String serialize(T t) throws JsonProcessingException {
            ObjectMapper mapper = new ObjectMapper();
            String jsonResult = mapper.writerWithDefaultPrettyPrinter()
                    .writeValueAsString(t);
            return jsonResult;
        }

反序列化：

public static <T> T deserialize(String string, Class<T> clazz) throws IOException {
            ObjectMapper mapper = new ObjectMapper();
            return mapper.readValue(string, clazz);
        }

测试

Map<String, String> stringStringMap = new HashMap<String, String>();
            stringStringMap.put("key", "value");
            System.out.println("serialize = " + serialize(stringStringMap));
            System.out.println("deserialize = " + deserialize(serialize(stringStringMap), Map.class));
    
            Map<String, Person> stringPersonMap = new HashMap<String, Person>();
            stringPersonMap.put("engineer", Person.builder().firstName("Tom").lastName("Walton").age(19).build());
            System.out.println("serialize = " + serialize(stringPersonMap));
            System.out.println("deserialize = " + deserialize(serialize(stringPersonMap), Map.class));
    
            Map<Person, Person> personPersonMap = new HashMap<Person, Person>();
            personPersonMap.put(Person.builder().firstName("Tom").lastName("Walton").age(19).build(), Person.builder().firstName("Jerry").lastName("Walton").age(59).build());
            System.out.println("serialize = " + serialize(personPersonMap));
            System.out.println("deserialize = " + deserialize(serialize(personPersonMap), Map.class));
    
            Person person = Person.builder().firstName("FirstName").lastName("LastName").age(19).build();
            String strPerson = serialize(person);
            System.out.println("serialize =" + strPerson);
            System.out.println("deserialize = " + deserialize(strPerson, Person.class));

Person定义

@Builder
    @Getter
    @Setter
    @EqualsAndHashCode
    @ToString
    @JsonIgnoreProperties
    class Person {
        @JsonProperty
        private String firstName;
        @JsonProperty
        private String lastName;
        @JsonProperty
        private int age;
    }

[http://www.baeldung.com/jackson-map][http_www.baeldung.com_jackson-map]

[http://www.baeldung.com/jackson-deserialization][http_www.baeldung.com_jackson-deserialization]

[http_www.baeldung.com_jackson-map]: http://www.baeldung.com/jackson-map
[http_www.baeldung.com_jackson-deserialization]: http://www.baeldung.com/jackson-deserialization