javax.ws.rs.ProcessingException：找不到类 com.example.demo.Greeting 的消息正文编写器，ContentType：*/*

问题描述

我创建了如下的休息服务

@RestController
public class MyService {

    @PostMapping("/greeting")
    public Greeting greeting(Greeting greeting) {
        return new Greeting("hello1 " + greeting.getName());
    }
}

型号

public class Greeting {

    private String name;

    public Greeting(String name) {
        this.name = name;
    }

    public Greeting() {
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    @Override public String toString() {
        return "Greeting{" +
            ",name='" + name + '\'' +
            '}';
}

我正在使用基于 Apache CXF 代理的 Rest 客户端

客户端使用的依赖

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.apache.cxf</groupId>
            <artifactId>cxf-rt-rs-client</artifactId>
            <version>3.4.2</version>
        </dependency>
        <dependency>
            <groupId>org.apache.cxf</groupId>
            <artifactId>cxf-rt-frontend-jaxrs</artifactId>
            <version>3.4.2</version>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-databind</artifactId>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.dataformat</groupId>
            <artifactId>jackson-dataformat-xml</artifactId>
        </dependency>
        <dependency>
            <groupId>org.apache.cxf</groupId>
            <artifactId>cxf-rt-rs-client</artifactId>
            <version>3.4.2</version>
        </dependency>
        <dependency>
            <groupId>org.apache.cxf</groupId>
            <artifactId>cxf-rt-frontend-jaxrs</artifactId>
            <version>3.4.2</version>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.jaxrs</groupId>
            <artifactId>jackson-jaxrs-json-provider</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>

客户端调用远程rest服务的接口

interface MyServiceIntf {

    @POST()
    Greeting greeting(Greeting greeting);
}

基于代理的 Rest 客户端

public static Greeting callRest() {
        MyServiceIntf proxy = JAXRSClientFactory.create(
            "http://localhost:8080/greeting",MyServiceIntf.class,Collections.singletonList(new JacksonJaxbJsonProvider())
        );
        WebClient.client(proxy).accept(MediaType.APPLICATION_JSON_TYPE);
        Greeting greeting = new Greeting("Hi");
        return proxy.greeting(greeting);
    }

我使用此代理调用 Get 请求没有问题，但是当 post 服务接受自定义 java 模型作为输入时出现问题。我收到以下错误

Exception in thread "main" javax.ws.rs.ProcessingException: No message body writer has been found for class com.example.demo.Greeting,ContentType: */*
    at org.apache.cxf.jaxrs.client.AbstractClient.reportMessageHandlerProblem(AbstractClient.java:846)
    at org.apache.cxf.jaxrs.client.AbstractClient.writeBody(AbstractClient.java:532)
    at org.apache.cxf.jaxrs.client.ClientProxyImpl$BodyWriter.doWriteBody(ClientProxyImpl.java:1102)
    at org.apache.cxf.jaxrs.client.AbstractClient$AbstractBodyWriter.handleMessage(AbstractClient.java:1214)
    at org.apache.cxf.phase.PhaseInterceptorChain.doIntercept(PhaseInterceptorChain.java:308)
    at org.apache.cxf.jaxrs.client.AbstractClient.doRunInterceptorChain(AbstractClient.java:703)
    at org.apache.cxf.jaxrs.client.ClientProxyImpl.doChainedInvocation(ClientProxyImpl.java:897)
    at org.apache.cxf.jaxrs.client.ClientProxyImpl.invoke(ClientProxyImpl.java:345)
    at com.example.demo.$Proxy61.greeting(UnkNown Source)
    at com.example.demo.DemoApplication.callRest(DemoApplication.java:29)
    at com.example.demo.DemoApplication.main(DemoApplication.java:20)

我尝试了这里提到的多种方法cxf-no-message-body-writer

解决方法

暂无找到可以解决该程序问题的有效方法，小编努力寻找整理中！

如果你已经找到好的解决方法，欢迎将解决方案带上本链接一起发送给小编。

小编邮箱:dio#foxmail.com (将#修改为@）