Json JavaObject 互相转换-蒲公英云

引入第三方组件对 JSON 做验证, 调用 JsonSanitizer.sanitize() 进行校验
在这里插入图片描述

Maven依赖

<dependency>
    <groupId>com.fasterxml.jackson.core</groupId>
    <artifactId>jackson-core</artifactId>
    <version>2.14.2</version>
</dependency>
<dependency>
    <groupId>com.fasterxml.jackson.core</groupId>
    <artifactId>jackson-annotations</artifactId>
    <version>2.15.1</version>
</dependency>
<dependency>
    <groupId>com.fasterxml.jackson.core</groupId>
    <artifactId>jackson-databind</artifactId>
    <version>2.15.1</version>
</dependency>
--new ObjectMapper()
<dependency>
    <groupId>com.mikesamuel</groupId>
    <artifactId>json-sanitizer</artifactId>
    <version>1.2.3</version>
</dependency>
--引入第三方组件对 JSON 做验证, 调用 JsonSanitizer.sanitize() 进行校验

序列化（Object → Json）

jackson

public static <T> String toJson(T object) {
    ObjectMapper objectMapper = new ObjectMapper();
    String jsonStr = null;
    try {
        jsonStr = objectMapper.writeValueAsString(object);
    } catch (JsonProcessingException e) {
        log.info("occur error:{}", e.getMessage());
    }
    return jsonStr;
}
public static <T> String toJsonNonNullSnake(T object) {
    ObjectMapper objectMapper = new ObjectMapper();
    objectMapper.setSerializationInclusion(JsonInclude.Include.NON_NULL);
    objectMapper.setPropertyNamingStrategy(PropertyNamingStrategy.SNAKE_CASE);
    String jsonStr = null;
    try {
        jsonStr = objectMapper.writeValueAsString(object);
    } catch (JsonProcessingException e) {
        log.info("occur error:{}", e.getMessage());
    }
    return jsonStr;
}

Gson

public static <T> String toJson2(T object) {
    Gson gson = new GsonBuilder()
            .setLenient()// json宽松
            .enableComplexMapKeySerialization()//支持Map的key为复杂对象的形式
            .serializeNulls() //智能null
            .setPrettyPrinting() // 美化格式
            .disableHtmlEscaping() //默认是GSON把HTML转义的
            .create();
    return gson.toJson(object);
}

UT

@Test
public void testToJson_BeanToJson() {
    Person person = new Person();
    person.setId(1);
    person.setName("name");
    person.setAge(18);
    String json = JsonUtils.toJson(person);
    assertThat(json).isEqualTo("{\"id\":1,\"name\":\"name\",\"age\":18,\"nickName\":null}");
}
@Test
public void testToJson_MapToJson() {
    Map<String, Object> map = new HashMap<>();
    map.put("id", 1L);
    map.put("name", "name");
    map.put("age", 18);
    String json = JsonUtils.toJson(map);
    assertThat(json).isEqualTo("{\"name\":\"name\",\"id\":1,\"age\":18}");
}
@Test
public void testToJson_noNull_Snake() {
    Person person = new Person();
    person.setId(1);
    person.setName("name");
    person.setAge(null);
    person.setNickName("nickName");
    String json = JsonUtils.toJsonNonNullSnake(person);
    assertThat(json).isEqualTo("{\"id\":1,\"name\":\"name\",\"nick_name\":\"nickName\"}");
}
@Test
public void testToJson2_BeanToJson() {
    Person person = new Person();
    person.setId(1);
    person.setName("name");
    person.setAge(18);
    String json = JsonUtils.toJson2(person);
    assertThat(json).isEqualTo("{\"id\":1,\"name\":\"name\",\"age\":18,\"nickName\":null}");
}

反序列化（Json → Object）

jackson

public static <T> T jsonToT(String json, Class<T> clazz) {
    ObjectMapper objectMapper = new ObjectMapper();
    T t = null;
    try {
        t = objectMapper.readValue(JsonSanitizer.sanitize(json), clazz);
    } catch (JsonProcessingException e) {
        log.info("occur error:{}", e.getMessage());
    }
    return t;
}
public static <T> T jsonToTNonNullSnake(String json, Class<T> clazz) {
    ObjectMapper objectMapper = new ObjectMapper();
    objectMapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false); // 跳过不认识字段
    objectMapper.setSerializationInclusion(JsonInclude.Include.NON_NULL); // 不包括null
    objectMapper.setPropertyNamingStrategy(PropertyNamingStrategy.SNAKE_CASE); // 属性蛇形命名
    T t = null;
    try {
        t = objectMapper.readValue(JsonSanitizer.sanitize(json), clazz);
    } catch (JsonProcessingException e) {
        log.info("occur error:{}", e.getMessage());
    }
    return t;
}

Gson

public static <T> T jsonToTG(String json, Class<T> clazz) {
    Gson gson = new GsonBuilder()
            .setLenient()// json宽松
            .enableComplexMapKeySerialization()//支持Map的key为复杂对象的形式
            .serializeNulls() //智能null
            .setPrettyPrinting()// 美化格式
            .disableHtmlEscaping() //默认是GSON把HTML转义的
            .create();
    return gson.fromJson(Normalizer.normalize(JsonSanitizer.sanitize(json), Normalizer.Form.NFC), clazz);
}

UT

@Test
public void testJsonToBean() {
    String json = "{\"id\":1,\"name\":\"name\",\"age\":18}";
    ObjectMapper mapper = new ObjectMapper();
    Person person = JsonUtils.jsonToT(json, Person.class);
    System.out.println(person);
}
@Test
public void testJsonToMap() {
    String json = "{\"id\":1,\"name\":\"name\",\"age\":18}";
    Map map = JsonUtils.jsonToT(json, Map.class);
    System.out.println(map);
}
@Test
public void testJsonToBean_noNull_Snake() {
    String json = "{\"id\":1,\"name\":\"name\",\"nick_name\":\"nickName\"}";
    ObjectMapper mapper = new ObjectMapper();
    Person person = JsonUtils.jsonToTNonNullSnake(json, Person.class);
    System.out.println(person);
}
@Test
public void testJsonToBean_Gson() {
    String json = "{\"id\":1,\"name\":\"name\",\"nick_name\":\"nickName\"}";
    String json2 = "{\"id\":1,\"name\":\"name\",\"age\":18},\"nickName\":\"nickName\"}";
    ObjectMapper mapper = new ObjectMapper();
    Person person = JsonUtils.jsonToTG(json, Person.class);
    System.out.println(person);
    Person person2 = JsonUtils.jsonToTG(json2, Person.class);
    System.out.println(person2);
}