请求对象为@RequestBody MyRequest request时，MyReqeust中包含了枚举类型。
如果不加处理，前端只能传递枚举名或者枚举数组下标。
经过改造，可以传递自已定义的枚举值。
参考文章：https://blog.csdn.net/liuxinghao/article/details/119881628
具体实现步骤
- 定义基本枚举类
public interface BaseEnum {
Integer getCode();
}
- 定义Jackson解析器
public class CodeToEnumDeserializer extends JsonDeserializer<BaseEnum> {
@Override
public BaseEnum deserialize(JsonParser jsonParser, DeserializationContext deserializationContext)
throws IOException {
final Integer param = jsonParser.getIntValue();// 1
final JsonStreamContext parsingContext = jsonParser.getParsingContext();// 2
final String currentName = parsingContext.getCurrentName();// 3
final Object currentValue = parsingContext.getCurrentValue();// 4
try {
final Field declaredField = currentValue.getClass().getDeclaredField(currentName);// 5
final Class<?> targetType = declaredField.getType();// 6
final Method valuesMethod = targetType.getDeclaredMethod("values");// 7
BaseEnum[] enums = (BaseEnum[]) valuesMethod.invoke(null);
for (BaseEnum anEnum : enums) {
if(anEnum.getCode().equals(param)){
return anEnum;
}
}
throw new RuntimeException("不匹配");
} catch (NoSuchMethodException | InvocationTargetException | IllegalAccessException | NoSuchFieldException e) {
throw new RuntimeException("不匹配",e);
}
}
}
- 业务中的枚举类，需要继承
BaseEnum
@Getter
@ToString
@AllArgsConstructor
@JsonFormat(shape=JsonFormat.Shape.OBJECT)
public enum OrderStatusEnum implements BaseEnum {
NEW(1,"新建"),
SEND(2,"配送"),
RECEIVE(3,"收货"),
DONE(4,"完成");
private Integer code;
private String name;
}
- 定义请求类，在枚举类上添加
@JsonDeserialize(using = CodeToEnumDeserializer.class)
@Data
@ToString
public class MyEnumRequest {
private String orderSn;
@JsonDeserialize(using = CodeToEnumDeserializer.class)
private OrderStatusEnum orderStatus;
}
- 定义接口，进行测试
@PostMapping("enum-request")
public Rsp<MyEnumRequest> enumRequest(@RequestBody MyEnumRequest enumRequest){
log.info("请求参数：{}",enumRequest);
return Rsp.success(enumRequest);
}
具体请求返回如下：
// 请求参数
{
"orderSn": "123",
"orderStatus": 3
}
// 返回参数
{
"code": 0,
"mark": null,
"info": "",
"data": {
"orderSn": "123",
"orderStatus": {
"code": 3,
"name": "收货"
}
},
"values": null,
"success": true
}
总结
先定义BaseEnum和CodeToEnumDeserializer解析器，在具体的业务枚举上添加@JsonDeserialize(using = CodeToEnumDeserializer.class)注解，即可实现需求。