我收到了错误http://jira.codehaus.org/browse/JACKSON-288,但它说错误应该已经在版本1.6.2中得到修复。
我指的是很多线程,比如,
Jersey JSON and Date
How to convert Date(ActionScript 3) to java.util.Date through a xml?
我尝试了1.12版,1.14版,1.17.1版,所有这些都无法在我这边工作。
@XmlRootElement(name="info")
@XmlAccessorType(XmlAccessType.NONE)
public class InfoVO {
private int infoId;
@XmlElement
@XmlJavaTypeAdapter(DateAdapter.class)
private Date createTime;
//...get/set
}
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import javax.ws.rs.WebApplicationException;
import javax.xml.bind.annotation.adapters.XmlAdapter;
public class DateAdapter extends XmlAdapter<String, Date> {
private static final SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
@Override
public String marshal(Date v) {
return dateFormat.format(v);
}
@Override
public Date unmarshal(String v) {
try {
return dateFormat.parse(v);
} catch (ParseException e) {
throw new WebApplicationException();
}
}
}
<dependency>
<groupId>javax.annotation</groupId>
<artifactId>jsr250-api</artifactId>
<version>1.0</version>
</dependency>
但是DateAdapter根本无法被调用,并且有例外,
2013-06-12 11:11:13.363:WARN :: / xa / info / save / 12121:org.codehaus.jackson.map.JsonMappingException:无法从String值&构造java.util.Date的实例#39; 2013-06-08 08:00:00&#39;:不是有效的陈述(错误:无法解析日期&#34; 2013-06-08 08:00:00&#34;:与任何不兼容标准形式(&#34; yyyy-MM-dd&#39; T&#39; HH:mm:ss.SSSZ&#34;,&#34; yyyy-MM-dd&#39; T&#39; HH:mm :ss.SSS&#39; Z&#39;&#34;,&#34; EEE,dd MMM yyyy HH:mm:ss zzz&#34;,&#34; yyyy-MM-dd&#34;))|在[来源:java.io.StringReader@b0ff5e1; line:8,column:23](通过参考链:com.xchange.me.vo.InfoVO [&#34; createTime&#34;])
答案 0 :(得分:0)
我找到了根本原因,因为我添加了一个自定义的MessageBodyReader,
@Provider
@Consumes("application/json")
public class CustomJsonReader<T> implements MessageBodyReader<T> {
@Override
public boolean isReadable(Class<?> type, Type genericType, Annotation[] annotations, MediaType mediaType) {
return true;
}
@Override
public T readFrom(Class<T> type, Type genericType, Annotation[] annotations, MediaType mediaType, MultivaluedMap<String, String> httpHeaders,
InputStream entityStream) throws IOException, WebApplicationException {
/*
* Copy the input stream to String. Do this however you like. Here I use
* Commons IOUtils.
*/
StringWriter writer = new StringWriter();
IOUtils.copy(entityStream, writer, "UTF-8");
String json = writer.toString();
/*
* if the input stream is expected to be deserialized into a String,
* then just cast it
*/
if (String.class == genericType)
return type.cast(json);
/*
* Otherwise, deserialize the JSON into a POJO type. You can use
* whatever JSON library you want, here's a simply example using GSON.
*/
ObjectMapper objectMapper = new ObjectMapper();
return objectMapper.readValue(json, type);
}
}
所以当收到json数据时,总是进入readFrom方法,然后在行返回objectMapper.readValue(json,type)中抛出异常;
所以我认为根本原因是ObjectMapper.readValue忽略注释@XmlJavaTypeAdapter