Question

我的xml下面有一个数字值

<detalhe>
  <numLinha>1048  </numLinha>
</detalhe

标签numLinha将在java中转换为attibute，但是我收到了folow消息，因为标签末尾有空格：

Exception in thread "main"  
com.thoughtworks.xstream.converters.ConversionException: For input string "1048                    "

@XStreamAlias("detalhe")
public class BodyDetail implements Serializable {

   private static final long serialVersionUID = -1000785985130865301L;

   @XStreamAlias("numLinha")
   private Integer lineNumber;
}

Answer 1

我使用Integer Type的自定义转换器解决了我的问题。

首先我创建了转换器：

package converter;

import com.thoughtworks.xstream.converters.Converter;
import com.thoughtworks.xstream.converters.MarshallingContext;
import com.thoughtworks.xstream.converters.UnmarshallingContext;
import com.thoughtworks.xstream.io.HierarchicalStreamReader;
import com.thoughtworks.xstream.io.HierarchicalStreamWriter;

public class IntegerConverter implements Converter {

   @SuppressWarnings("rawtypes")
   @Override
   public boolean canConvert(Class clazz) {
       return clazz.equals(Integer.class);
   }

   @Override
   public void marshal(Object object, HierarchicalStreamWriter writer,
        MarshallingContext context) {
   }

   @Override
   public Object unmarshal(HierarchicalStreamReader reader,
        UnmarshallingContext context) {
      String text = (String)reader.getValue();
      Integer number = Integer.parseInt(text.trim());
      return number;
   }    
}

我注册了转换器：

 public class XMLRead {

   public static void main(String[] args) {

      XStream xStream = new XStream();    
      xStream.registerConverter(new IntegerConverter());
   }
 }

如何使用XStream从xml标记中删除空格？

1 个答案: