[英]Getting error A message body writer for Java class java.util.ArrayList/List<java.lang.String> was not found
well this has been posted a lot of time here but no solution worked for me... 这已经在这里发布了很多时间,但没有解决方案对我有用...
i can avoid this error by making a wrapper class but it only returned 我可以通过创建一个包装类来避免这个错误,但它只返回
</stringWrapper>
what am i doing wrong ? 我究竟做错了什么 ?
StringWrapper class: StringWrapper类:
import java.util.ArrayList;
import java.util.List;
import javax.xml.bind.annotation.XmlRootElement;
@XmlRootElement
public class StringWrapper {
public StringWrapper (){}
List<String> list=new ArrayList<String>();
public void add(String s){
list.add(s);
}
}
code : 代码:
@Path("/xml")
@GET
@Produces({MediaType.APPLICATION_XML,MediaType.APPLICATION_JSON})
public StringWrapper mystring(){
StringWrapper thestring=new StringWrapper();
thestring.add("a");
thestring.add("a");
return thestring;
}
Java Rest webservice using Jersey. 使用Jersey的Java Rest webservice。
You should add at least a getter in your StringWrapper. 您应该在StringWrapper中添加至少一个getter。 Without public attributes, there is nothing to serialize. 没有公共属性,没有任何序列化。 So the output is correct. 所以输出是正确的。 If you do not want a tag around the list of your strings, you can mark a single getter with @XmlValue. 如果您不想在字符串列表周围添加标记,则可以使用@XmlValue标记单个getter。
@XmlRootElement
public class StringWrapper {
public StringWrapper (){}
List<String> list=new ArrayList<String>();
public void add(String s) { list.add(s); }
@XmlValue
public List<String> getData() { return list; }
}
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