假如咱们定义了如下的枚举类，蕴含code和msg两个属性。

package cn.bugkit.serialization.components;import java.security.InvalidParameterException;/** * @author bugkit * @since 2022.2.25 */public enum Result {    SUCCESS(0,"SUCCESS"),    FAIL(-1,"FAIL");    int code;    String msg;    Result(int code, String msg) {        this.code = code;        this.msg = msg;    }    public int getCode() {        return code;    }    public void setCode(int code) {        this.code = code;    }    public String getMsg() {        return msg;    }    public void setMsg(String msg) {        this.msg = msg;    }    public static Result valueOf(int code){        Result[] values = values();        for (Result result : values) {            if (result.getCode() == code) {                return result;            }        }        throw new InvalidParameterException("Invalid Code");    }}

Spring Boot Jackson枚举值默认是通枚举常量的名字来序列化和反序列化的。

假如当初前端要求前后端的通信通过code属性进行。咱们应该怎么做呢？

那就要用到Spring Boot提供的@JsonComponent注解了。

上面咱们一起看看残缺的实例吧。

首先是controller,提供了入参(反序列化)和后果返回(序列化)的例子。

/** * @author bugkit * @since 2022.2.25 */@RestControllerpublic class EnumController {    /**     * 入参的result字段是 -1 - fail，后果是0 - success     * @param response     * @return     */    @PostMapping("test")    public HttpResponse testSerialize(@RequestBody HttpResponse response) {        System.out.println(response);        return new HttpResponse(Result.SUCCESS, null);    }}

上面咱们看看HttpResponse,蕴含属性result和数据data

/** * @author bugkit * @since 2022.2.25 */public class HttpResponse {    private Result result;    private Object data;    public HttpResponse(Result result, Object data) {        this.result = result;        this.data = data;    }    public Result getResult() {        return result;    }    public void setResult(Result result) {        this.result = result;    }    public Object getData() {        return data;    }    public void setData(Object data) {        this.data = data;    }    @Override    public String toString() {        return "HttpResponse{" +                "result=" + result +                ", data=" + data +                '}';    }}

最初再看看要害的中央，标注Result所应用的序列化和反序列化类

/** * @author bugkit * @since 2022.2.25 */@JsonComponentpublic class WenSerialization {    /**     * 序列化，行将Java对象转为JSON，用于将Java对象转为前端所需的后果，此处只传输Result的code字段     */    public static class ResultSerializer extends JsonSerializer<Result> {        @Override        public void serialize(Result value, JsonGenerator gen, SerializerProvider serializers) throws IOException {            gen.writeNumber(value.getCode());        }    }    /**     * 反序列化，将JSON转为Java对象，用于接管前端参数     */    public static class ResultDeSerializer extends JsonDeserializer<Result> {        @Override        public Result deserialize(JsonParser p, DeserializationContext ctxt) throws IOException, JacksonException {            ObjectCodec codec = p.getCodec();            JsonNode treeNode = codec.readTree(p);            int code = treeNode.intValue();            return Result.valueOf(code);        }    }}

最初咱们来看看测试后果：

入参

{    "result": -1,    "data": "data"}

控制台打印

2022-02-25 10:16:57.583  INFO 1324 --- [nio-8080-exec-2] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring DispatcherServlet 'dispatcherServlet'2022-02-25 10:16:57.584  INFO 1324 --- [nio-8080-exec-2] o.s.web.servlet.DispatcherServlet        : Initializing Servlet 'dispatcherServlet'2022-02-25 10:16:57.584  INFO 1324 --- [nio-8080-exec-2] o.s.web.servlet.DispatcherServlet        : Completed initialization in 0 msHttpResponse{result=FAIL, data=data}

返回后果

{    "result": 0,    "data": null}

留神：该形式只针对应用了spring boot自带的jackson才失效。

序列化其余自定义对象也是同理

代码地址：https://github.com/bennetty74...