解析XML时是否出现IllegalStateException?

时间:2015-02-13 13:49:59

标签: java xml xml-parsing stax

在解析XMl时,如果XML有一个父标记,那么它工作正常,如果它有多个父标记,那么它会抛出以下异常。

java.lang.IllegalStateException: Current state END_ELEMENT is not among the statesCHARACTERS, COMMENT, CDATA, SPACE, ENTITY_REFERENCE, DTD valid for getText() 
        at com.sun.org.apache.xerces.internal.impl.XMLStreamReaderImpl.getText(Unknown Source)
        at com.axxonet.queue.xmlParserValues.parse(xmlParserValues.java:37)
        at com.axxonet.queue.xmlParserValues.main(xmlParserValues.java:19)

如果XML格式具有这种结构,那么它工作正常。

<Address>
    <Name>Rahul</Name>
    <ID>2345</ID>
    <City>Pune</City>
    <Street>Gandhi Nagar</Street>
</Address>

如果any字段值为null,则生成标签<phone/>然后在解析时我得到以下异常。

<Address>
    <Name>Rahul</Name>
    <ID>2345</ID>
    <City/>
    <Street>Gandhi Nagar</Street>
</Address>

我尝试在IllegalStateException块中添加catch例外,但它仍在抛出异常。

我的代码如下,

Map<String, String> map = new HashMap<String, String>();
            XMLStreamReader xr;
                try {
                        xr = XMLInputFactory.newInstance().createXMLStreamReader(new FileInputStream("E:/Softwares/eclipse/reqOutputFile.xml"));
                         while(xr.hasNext()) {
                                int e = xr.next();
                                if (e == XMLStreamReader.START_ELEMENT) {
                                    String name = xr.getLocalName();
                                    xr.next();
                                    String value = null;

                                    try{
                                            value = xr.getText();
                                    }
                                    catch(IllegalStateException ex)
                                    {
                                            ex.printStackTrace();
                                    }
                 map.put(name, value);               
                                } 
                            }
                } catch (FileNotFoundException e1) {
                        e1.printStackTrace();
                } catch (XMLStreamException e1) {
                        e1.printStackTrace();
                } catch (FactoryConfigurationError e1) {
                        e1.printStackTrace();
                }

我们如何处理异常?

2 个答案:

答案 0 :(得分:1)

我认为你的xml应该是这样的

<Root>
    <Address>
       <Name>Rahul</Name>
       <ID>2345</ID>
       <City>Pune</City>
       <Street>Gandhi Nagar</Street>
    </Address>
    <ContactAddress>
      <phone>223363</phone>
      <mobile>9988776655</mobile>
    </ContactAddress>
</Root>

答案 1 :(得分:1)

更改代码以执行以下操作以利用getElementText()方法,而不是尝试前进到可能不存在的文本节点:

int e = xr.next();
if (e == XMLStreamReader.START_ELEMENT) {
    String name = xr.getLocalName();
    // xr.next();
    String value = null;
    try{
        if(xr.hasText()) {
            value = xr.getElementText(); // was xr.getText();
        }
    }
    catch(IllegalStateException ex)
    {
        ex.printStackTrace();
    }
    map.put(name, value);               
}