JAX-RS和CDI / @Provider和beans.xml

时间:2012-05-10 14:23:13

标签: java jax-rs cdi

我做了一个使用JAX-RS(RESTfull服务)的简单项目

我有一个部署到JBoss AS 6.1的JAX-RS(RESTfull服务)webservice项目。默认情况下,JBoss 6.1 AS提供了与JSON集成的resteasy。我想更改默认JSON资源的日期格式。

我从互联网上得到了一些帮助,并添加了一个扩展JacksonJsonProvider的课程:

@Provider
@Produces("application/json")
public class MyJacksonJsonProvider extends JacksonJsonProvider {
    public static final String pattern = "YYYY-MM-dd'T'HH:mm:ss";

    @Override
    public void writeTo(Object value, Class<?> type, Type genericType, Annotation[] annotations, MediaType mediaType, MultivaluedMap<String,Object> httpHeaders, OutputStream entityStream) throws IOException, WebApplicationException {
        ObjectMapper mapper = locateMapper(type, mediaType);

        // Set customized date format
        SimpleDateFormat sdf = new SimpleDateFormat(pattern);
        mapper.getSerializationConfig().setDateFormat(sdf);

        super.writeTo(value, type, genericType, annotations, mediaType, httpHeaders, entityStream);
    }
}

这一点很有效,直到我在WebContent / WEB-INF下添加了一个空beans.xml用于CDI注入。

MyJacksonJsonProvider没有被调用,我仍然获得默认的JSON日期格式。

即使在pom.xml下添加以下依赖项也无济于事:

<dependency>
    <groupId>org.jboss.resteasy</groupId>
    <artifactId>resteasy-jaxrs</artifactId>
</dependency>
<dependency>
    <groupId>org.jboss.resteasy</groupId>
    <artifactId>resteasy-cdi</artifactId>
    <version>2.2.1.GA</version>
</dependency>

如果我在“WebContent / WEB-INF”文件夹下有一个空的beans.xml,是否有人知道为什么忽略MyJacksonJsonProvider?非常感谢提前!

仅供参考,这是样本模型类:

@XmlRootElement(name = "movie")
public class Movie {

    String name;
    String director;
    int year;
    Date date;

    @XmlElement
    public String getName() {
        return name;
    }

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

    @XmlElement
    public String getDirector() {
        return director;
    }

    public void setDirector(String director) {
        this.director = director;
    }

    @XmlAttribute
    public int getYear() {
        return year;
    }

    public void setYear(int year) {
        this.year = year;
    }

    @XmlElement
    public Date getDate() {
       return date;
    }

    public void setDate(Date date) {
        this.date = date;
    }

}

这是生成JSON资源的类:

@Path("/json/movie")
public class JSONService {

    @GET
    @Path("/get")
    @Produces("application/json")
    public Movie getMovieInJSON() {

        Movie movie = new Movie();
        movie.setName("Little flower");
        movie.setDirector("Zhang Zheng");
        movie.setYear(1979);
        movie.setDate(new Date());

        return movie; 

    }
}

1 个答案:

答案 0 :(得分:1)

我相信我也遇到了这个问题。这是一个known issue (RESTEASY-555),如果你无法将Resteasy升级到&gt; = 2.3.3.Final,那就是告诉Weld将MyJacksonJsonProvider排除在下面:

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://java.sun.com/xml/ns/javaee"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:weld="http://jboss.org/schema/weld/beans"
       xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://docs.jboss.org/cdi/beans_1_0.xsd
                           http://jboss.org/schema/weld/beans http://jboss.org/schema/weld/beans_1_1.xsd">
  <weld:scan>
    <weld:exclude name="MyJacksonJsonProvider" />
  </weld:scan>
</beans>