java SimpleXML反序列化程序

Question

我不熟悉简单的XML，我遇到了一个问题，不确定我做错了什么

我有以下XML：

    <BOOK>
    <CHAPTER>
      <TEXTLINE />
      <TEXTLINE > line of text.... </TEXTLINE>
      <TEXTLINE > line of text... </TEXTLINE>
    </CHAPTER >
    < CHAPTER >
      <TEXTLINE />
      <TEXTLINE > line of text.... </TEXTLINE>
    </CHAPTER >
<BOOK>

我的java课程：

   @Root
    public static class Book {

        @ElementList(entry = "CHAPTER", inline = true) public ArrayList<ReceiptElement> chapter;

         public ReceiptElement getChapterLines() {
            if (this. chapter != null && this. chapter.size() > 0)
                return  chapter.get(0);
            else
                return null;
        }

    }

    @Root
    public static class Chapter {

        @ElementList(entry = "TEXTLINE", inline = true) public ArrayList<TextLine> lines;

       public ArrayList<TextLine> getLines() {
            return this.lines;
        }


     }

    public static class TextLine {

        private String textline;

        public  TextLine(@ElementMap(entry = "TEXTLINE") String text) {
            this.textline = text;
        }

        public String getTextline() { return  this.textline; }
    }

我得到的例外情况是：

org.simpleframework.xml.core.ConstructorException: Parameter '' does not have a match in class TextLine

我试过几种变体，但都没有成功

提前谢谢

Answer 1

在解析之前，首先检查XML是否有效。您可以在这里签入在线XML验证程序：http://www.xmlvalidation.com/
尝试删除<CHAPTER>标记之间的空格，并结束<BOOK>

我认为这个异常org.simpleframework.xml.core.ConstructorException: Parameter '' does not have a match in class TextLine是因为您没有将@Root添加到TextLine类中

 <BOOK>
   <CHAPTER>
     <TEXTLINE/>
     <TEXTLINE> line of text.... </TEXTLINE>
     <TEXTLINE> line of text... </TEXTLINE>
   </CHAPTER>
   <CHAPTER>
     <TEXTLINE/>
     <TEXTLINE> line of text.... </TEXTLINE>
   </CHAPTER>
 </BOOK>

这本书。java

@Root
    public class Book {
        @ElementList(entry = "CHAPTER", inline = true) public ArrayList<Chapter> chapter;

         public Chapter getChapterLines() {
            if (this. chapter != null && this. chapter.size() > 0)
                return  chapter.get(0);
            else
                return null;
        }
    }

第章。java

@Root
public class Chapter {

    @ElementList(entry = "TEXTLINE", inline = true) public ArrayList<TextLine> lines;

   public ArrayList<TextLine> getLines() {
        return this.lines;
    }
 }

文本行。java

 @Root
    public class TextLine {

        private String textline;

        public  TextLine(@ElementMap(entry = "TEXTLINE") String text) {
            this.textline = text;
        }
        public String getTextline() { return  this.textline; }
    }