fastjson序列化时间自定义格式示例详解

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>1.2.80</version>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>1.18.20</version>
        </dependency>
    </dependencies>

@Data
@Accessors(chain = true)
public class Task {
    private String name;
    private LocalDateTime startTime;
    private LocalDateTime endTime;
}

/**
 * @param object 要序列化的对象
 * @param config 序列化配置
 * @param features
 */
public static String toJSONString(Object object, SerializeConfig config, SerializerFeature... features)

/**
 * @param type 类型
 * @param value 序列化器
 */
public boolean put(Type type, ObjectSerializer value)

public class JsonSerializer implements ObjectSerializer {
    @Override
    public void write(JSONSerializer serializer, Object object, Object fieldName, Type fieldType, int features) throws IOException {
        SerializeWriter out = serializer.getWriter();
        if (object == null) {
            serializer.getWriter().writeNull();
            return;
        }
        // 对LocalDateTime类型进行格式转化
        out.write("\"" + ((LocalDateTime) object).format(DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss")) + "\"");
    }
}

@Configuration
public class JsonConfig {
    @Bean
    public SerializeConfig serializeConfig() {
        SerializeConfig config = new SerializeConfig();
        // 对LocalDateTime类型指定自定义的序列化器
        config.put(LocalDateTime.class, objectSerializer());
        return config;
    }
    @Bean
    public ObjectSerializer objectSerializer() {
        return new JsonSerializer();
    }
}

@RestController
@RequestMapping
public class FastJsonDemo {
    @Autowired
    private SerializeConfig serializeConfig;
    @RequestMapping("/test")
    public String jsonTest() {
        LocalDateTime now = LocalDateTime.now();
        Task task = new Task().setName("拯救地球任务").setStartTime(now).setEndTime(now.plusDays(10));
        return JSON.toJSONString(task, serializeConfig);
    }
}