从Spring Boot Controller返回JAXB生成的元素

我从http://www.ncpdp.org的XSD文件中生成了大量的Java文件(仅适用于成员).在生成它们之后,我想在我的Spring Controller中使用它们,但是我在将响应转换为XML时遇到了问题.

我已经尝试返回元素本身,以及JAXBElement< T>,但似乎都不起作用.以下测试失败：

java.lang.AssertionError: Status 
Expected :200
Actual   :406

@Test
public void testHelloWorld() throws Exception {
    mockMvc.perform(get("/api/message")
            .accept(MediaType.APPLICATION_XML)
            .contentType(MediaType.APPLICATION_XML))
            .andExpect(status().isOk())
            .andExpect(content().contentType(MediaType.APPLICATION_XML));
}

这是我的控制器：

import org.ncpdp.schema.transport.MessageType;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class HelloWorldController {

    @RequestMapping(value = "/api/message", method = RequestMethod.GET)
    public MessageType messageType() {
        return new MessageType();
    }
}

我已经尝试创建一个MvcConfig来覆盖Spring Boot的MVC配置,但它似乎没有工作.

@Configuration
@EnableWebMvc
public class MvcConfig extends WebMvcConfigurerAdapter {

    @Override
    public void configureMessageConverters(List<HttpMessageConverter<?>> converters) {
        converters.add(marshallingHttpMessageConverter());
    }

    @Bean
    public MarshallingHttpMessageConverter marshallingHttpMessageConverter() {
        Jaxb2Marshaller jaxb2Marshaller = new Jaxb2Marshaller();
        jaxb2Marshaller.setPackagesToScan(new String[]{"com.ncpdb.schema.transport"});

        MarshallingHttpMessageConverter converter = new MarshallingHttpMessageConverter();
        converter.setMarshaller(jaxb2Marshaller);
        converter.setUnmarshaller(jaxb2Marshaller);
        converter.setSupportedMediaTypes(Arrays.asList(MediaType.APPLICATION_XML));

        return converter;
    }
}

我需要做些什么才能让Spring MVC将我生成的JAXB对象编组为XML？

解决方法:

我能够通过在与我的模式相同的目录中创建bindings.xjb文件来解决这个问题.这会导致JAXB在类上生成@XmlRootElement.

<?xml version="1.0"?>
<jxb:bindings version="1.0"
              xmlns:xsd="http://www.w3.org/2001/XMLSchema"
              xmlns:jxb="http://java.sun.com/xml/ns/jaxb"
              xmlns:xjc="http://java.sun.com/xml/ns/jaxb/xjc"
              xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
              xsi:schemaLocation="http://java.sun.com/xml/ns/jaxb http://java.sun.com/xml/ns/jaxb/bindingschema_2_0.xsd">

    <jxb:bindings schemaLocation="transport.xsd" node="/xsd:schema">
        <jxb:globalBindings>
            <xjc:simple/>
        </jxb:globalBindings>
    </jxb:bindings>
</jxb:bindings>

要为返回的XML添加名称空间前缀,我必须修改maven-jaxb2-plugin以添加几个参数.

<arg>-extension</arg>
<arg>-Xnamespace-prefix</arg>

并添加依赖项：

<dependencies>
    <dependency>
        <groupId>org.jvnet.jaxb2_commons</groupId>
        <artifactId>jaxb2-namespace-prefix</artifactId>
        <version>1.1</version>
    </dependency>
</dependencies>

然后修改我的bindings.xjb以包含这个：

<?xml version="1.0"?>
<jxb:bindings version="1.0"
              xmlns:xsd="http://www.w3.org/2001/XMLSchema"
              xmlns:jxb="http://java.sun.com/xml/ns/jaxb"
              xmlns:xjc="http://java.sun.com/xml/ns/jaxb/xjc"
              xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
              xmlns:namespace="http://jaxb2-commons.dev.java.net/namespace-prefix"
              xsi:schemaLocation="http://java.sun.com/xml/ns/jaxb http://java.sun.com/xml/ns/jaxb/bindingschema_2_0.xsd
              http://jaxb2-commons.dev.java.net/namespace-prefix http://java.net/projects/jaxb2-commons/sources/svn/content/namespace-prefix/trunk/src/main/resources/prefix-namespace-schema.xsd">

    <jxb:bindings schemaLocation="transport.xsd" node="/xsd:schema">
        <jxb:globalBindings>
            <xjc:simple/>
        </jxb:globalBindings>

        <jxb:schemaBindings>
            <jxb:package name="org.ncpdp.schema.transport"/>
        </jxb:schemaBindings>
        <jxb:bindings>
            <namespace:prefix name="transport"/>
        </jxb:bindings>
    </jxb:bindings>
</jxb:bindings>

我从https://java.net/projects/jaxb2-commons/pages/Namespace-prefix学到了如何做到这一点.我还发现http://blog.frankel.ch/customize-your-jaxb-bindings是一个很好的资源,可以自定义JAXB绑定.

标签：spring-mvc,spring,spring-boot-2,jaxb2
来源： https://codeday.me/bug/20190628/1320135.html