java - 如何修复此错误 :"Attempted to serialize java.lang.Class: org.springframework.beans.factory.annotation.Qualifier"

Question

我正在尝试从 Web 服务获取 token ，并且使用 Spring boot 进行编码，但是当我运行该应用程序时，收到以下错误消息: “尝试序列化 java.lang.Class:org.springframework.beans.factory.annotation.Qualifier。忘记注册类型适配器？”。 我看过不同的网上帖子都有同样的问题，但我不明白我做错了什么。

我进行了调试，直到出现错误并且 tokenRequest 包含调用的所有信息

package com.ids.app;



import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.CommandLineRunner;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

import com.ids.app.controller.FE_ControlController;




@SpringBootApplication(scanBasePackages={"io.swagger.client","com.ids.app.controller","com.ids.app.service"})


public class IdsFeApplication implements CommandLineRunner{



    @Autowired
    private FE_ControlController fec;



    public static void main(String[] args) {
        SpringApplication.run(IdsFeApplication.class, args);        

    }

    @Override
    public void run(String... args) throws Exception {
        System.out.println("Hello world!!!");



    fec.selWebServiceAndUsernameAndPassword("A");


    }

}


package com.ids.app.controller;

import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.stereotype.Controller;

import com.ids.app.entities.FE_Control;
import com.ids.app.service.FE_ControlService;

import io.swagger.client.ApiClient;
import io.swagger.client.ApiException;
import io.swagger.client.api.AuthorizationApi;
import io.swagger.client.model.TokenRequest;
import io.swagger.client.model.TokenResponse;

@Controller
@ComponentScan

public class FE_ControlController {

    @Autowired
    private FE_ControlService fe;

    @Autowired
    private ApiClient api;

    @Autowired
    private AuthorizationApi authorizationApi;

    @Autowired
    private TokenRequest tokenRequest;

    @Autowired
    private TokenResponse tokenResponse;

    private String accessToken;



    public void selWebServiceAndUsernameAndPassword(String code) {

        String webService=fe.selWebService(code);
        String username=fe.selUsername(code);
        String password=fe.selPassword(code);



        api.setBasePath(webService+"OAuth");
        authorizationApi.setApiClient(api);
        tokenRequest.setClientId(null);
        tokenRequest.setClientSecret(null);
        tokenRequest.setGrantType(TokenRequest.GrantTypeEnum.PASSWORD);
        tokenRequest.setUsername(username);
        tokenRequest.setPassword(password);
        try {

            System.out.println(tokenRequest.getUsername());
            System.out.println(tokenRequest.getPassword());
            tokenResponse=authorizationApi.token(tokenRequest);
            accessToken=tokenResponse.getAccessToken();
            System.out.println(accessToken);

        } catch (ApiException e) {

        }


    }

}

堆栈跟踪

java.lang.IllegalStateException: Failed to execute CommandLineRunner
    at org.springframework.boot.SpringApplication.callRunner(SpringApplication.java:816) [spring-boot-2.1.4.RELEASE.jar:2.1.4.RELEASE]
    at org.springframework.boot.SpringApplication.callRunners(SpringApplication.java:797) [spring-boot-2.1.4.RELEASE.jar:2.1.4.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:324) [spring-boot-2.1.4.RELEASE.jar:2.1.4.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1260) [spring-boot-2.1.4.RELEASE.jar:2.1.4.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1248) [spring-boot-2.1.4.RELEASE.jar:2.1.4.RELEASE]
    at com.ids.app.IdsFeApplication.main(IdsFeApplication.java:28) [classes/:na]
Caused by: java.lang.UnsupportedOperationException: Attempted to serialize java.lang.Class: org.springframework.beans.factory.annotation.Qualifier. Forgot to register a type adapter?
    at com.google.gson.internal.bind.TypeAdapters$1.write(TypeAdapters.java:73) ~[gson-2.8.1.jar:na]
    at com.google.gson.internal.bind.TypeAdapters$1.write(TypeAdapters.java:69) ~[gson-2.8.1.jar:na]
    at com.google.gson.TypeAdapter$1.write(TypeAdapter.java:191) ~[gson-2.8.1.jar:na]
    at com.google.gson.internal.bind.TypeAdapterRuntimeTypeWrapper.write(TypeAdapterRuntimeTypeWrapper.java:69) ~[gson-2.8.1.jar:na]
    at com.google.gson.internal.bind.CollectionTypeAdapterFactory$Adapter.write(CollectionTypeAdapterFactory.java:97) ~[gson-2.8.1.jar:na]
    at com.google.gson.internal.bind.CollectionTypeAdapterFactory$Adapter.write(CollectionTypeAdapterFactory.java:61) ~[gson-2.8.1.jar:na]
    at com.google.gson.internal.bind.TypeAdapterRuntimeTypeWrapper.write(TypeAdapterRuntimeTypeWrapper.java:69) ~[gson-2.8.1.jar:na]
    at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$1.write(ReflectiveTypeAdapterFactory.java:125) ~[gson-2.8.1.jar:na]
    at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$Adapter.write(ReflectiveTypeAdapterFactory.java:243) ~[gson-2.8.1.jar:na]
    at com.google.gson.internal.bind.TypeAdapterRuntimeTypeWrapper.write(TypeAdapterRuntimeTypeWrapper.java:69) ~[gson-2.8.1.jar:na]
    at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$1.write(ReflectiveTypeAdapterFactory.java:125) ~[gson-2.8.1.jar:na]
    at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$Adapter.write(ReflectiveTypeAdapterFactory.java:243) ~[gson-2.8.1.jar:na]
    at com.google.gson.internal.bind.TypeAdapterRuntimeTypeWrapper.write(TypeAdapterRuntimeTypeWrapper.java:69) ~[gson-2.8.1.jar:na]
    at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$1.write(ReflectiveTypeAdapterFactory.java:125) ~[gson-2.8.1.jar:na]
    at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$Adapter.write(ReflectiveTypeAdapterFactory.java:243) ~[gson-2.8.1.jar:na]
    at com.google.gson.Gson.toJson(Gson.java:669) ~[gson-2.8.1.jar:na]
    at com.google.gson.Gson.toJson(Gson.java:648) ~[gson-2.8.1.jar:na]
    at com.google.gson.Gson.toJson(Gson.java:603) ~[gson-2.8.1.jar:na]
    at com.google.gson.Gson.toJson(Gson.java:583) ~[gson-2.8.1.jar:na]
    at io.swagger.client.JSON.serialize(JSON.java:120) ~[classes/:na]
    at io.swagger.client.ApiClient.serialize(ApiClient.java:747) ~[classes/:na]
    at io.swagger.client.ApiClient.buildRequest(ApiClient.java:998) ~[classes/:na]
    at io.swagger.client.ApiClient.buildCall(ApiClient.java:949) ~[classes/:na]
    at io.swagger.client.api.AuthorizationApi.tokenCall(AuthorizationApi.java:248) ~[classes/:na]
    at io.swagger.client.api.AuthorizationApi.tokenValidateBeforeCall(AuthorizationApi.java:260) ~[classes/:na]
    at io.swagger.client.api.AuthorizationApi.tokenWithHttpInfo(AuthorizationApi.java:285) ~[classes/:na]
    at io.swagger.client.api.AuthorizationApi.token(AuthorizationApi.java:273) ~[classes/:na]
    at com.ids.app.controller.FE_ControlController.selWebServiceAndUsernameAndPassword(FE_ControlController.java:79) ~[classes/:na]
    at com.ids.app.IdsFeApplication.run(IdsFeApplication.java:39) [classes/:na]
    at org.springframework.boot.SpringApplication.callRunner(SpringApplication.java:813) [spring-boot-2.1.4.RELEASE.jar:2.1.4.RELEASE]
    ... 5 common frames omitted

Answer 1

这里，TokenRequest是一个Spring-bean，它不是一个简单的java对象，而是一个具有spring特定属性的代理。因此，当您调用 authorizationApi.token(tokenRequest) 时，它会尝试序列化对象并失败，因为它无法序列化特定于 bean 的类(在您的情况下为 Qualifier)。

TokenRequest不应该是一个spring管理的bean，而是一个简单的java对象。因此，删除 Autowiring 并将其设为方法变量实例，而不是保留在类级别。

    TokenRequest tokenRequest = new TokenRequest();
    tokenRequest.setGrantType(TokenRequest.GrantTypeEnum.PASSWORD);
    tokenRequest.setUsername(username);
    tokenRequest.setPassword(password);
    tokenResponse=authorizationApi.token(tokenRequest);
    accessToken = tokenResponse.getAccessToken();