Java importNode抛出异常org.w3c.dom.domeException
我正在编写一个函数,该函数必须将节点添加到XML文档中的给定节点 下面是该功能的实现:Java importNode抛出异常org.w3c.dom.domeException,java,android,xml,nodes,Java,Android,Xml,Nodes,我正在编写一个函数,该函数必须将节点添加到XML文档中的给定节点 下面是该功能的实现: /** * Adds the node aNewChild to the end of the list of children of this node. * If the newChild is already in the tree, it is first removed. * @param aNewChild The node to add.If it is a DocumentFragmen
/**
* Adds the node aNewChild to the end of the list of children of this node.
* If the newChild is already in the tree, it is first removed.
* @param aNewChild The node to add.If it is a DocumentFragment object,
* the entire contents of the document fragment are moved
* into the child list of this node
* @return The node added or null.
*/
public Node AddNode(Node aNode, Node aOldNode) {
Log.i(TAG, "AddNode()" );
if (aNode == null) {
Log.e(TAG, "aNode is null!");
return null;
}
if (aOldNode == null) {
Log.e(TAG, "aOldNode is null!");
return null;
}
Document document = aNode.getOwnerDocument();
aOldNode = document.importNode(aOldNode, true);
return aNode.appendChild(aOldNode);
} /* Node AddNode(Node aNode, Node aOldNode) **/
这段代码在Android 4.0.3上运行得很好,没有问题,函数add node到给定的节点没有错误,但是当我在Android 2.3.3下运行相同的代码时,函数aOldNode=document.importNodeaOldNode,true;当我尝试像这样添加try-catch块时:
try {
aOldNode = document.importNode(aOldNode, true);
}
catch(Exception ex) {
Log.e(TAG, ex.getMessage());
}
我只看到null而不是错误消息。谁知道原因是什么
以下是例外情况:
06-05 17:58:09.111: I/TestRunner(2769): ----- begin exception -----
06-05 17:58:09.122: I/TestRunner(2769): org.w3c.dom.DOMException
06-05 17:58:09.122: I/TestRunner(2769): at org.apache.harmony.xml.dom.NodeImpl.setNameNS(NodeImpl.java:227)
06-05 17:58:09.122: I/TestRunner(2769): at org.apache.harmony.xml.dom.ElementImpl.<init>(ElementImpl.java:50)
06-05 17:58:09.122: I/TestRunner(2769): at org.apache.harmony.xml.dom.DocumentImpl.createElementNS(DocumentImpl.java:336)
06-05 17:58:09.122: I/TestRunner(2769): at org.apache.harmony.xml.dom.DocumentImpl.shallowCopy(DocumentImpl.java:156)
06-05 17:58:09.122: I/TestRunner(2769): at org.apache.harmony.xml.dom.DocumentImpl.cloneOrImportNode(DocumentImpl.java:208)
06-05 17:58:09.122: I/TestRunner(2769): at org.apache.harmony.xml.dom.DocumentImpl.importNode(DocumentImpl.java:222)
06-05 17:58:09.122: I/TestRunner(2769): at com.fido.android.framework.service.XMLDOMNode.AddNode(XMLDOMNode.java:108)
06-05 17:58:09.122: I/TestRunner(2769): at com.fido.android.test.framework.service.XMLDOMNodeTest.testAddNodeNodeNode(XMLDOMNodeTest.java:89)
06-05 17:58:09.122: I/TestRunner(2769): at java.lang.reflect.Method.invokeNative(Native Method)
06-05 17:58:09.122: I/TestRunner(2769): at java.lang.reflect.Method.invoke(Method.java:507)
06-05 17:58:09.122: I/TestRunner(2769): at junit.framework.TestCase.runTest(TestCase.java:154)
06-05 17:58:09.122: I/TestRunner(2769): at junit.framework.TestCase.runBare(TestCase.java:127)
06-05 17:58:09.122: I/TestRunner(2769): at junit.framework.TestResult$1.protect(TestResult.java:106)
06-05 17:58:09.122: I/TestRunner(2769): at junit.framework.TestResult.runProtected(TestResult.java:124)
06-05 17:58:09.122: I/TestRunner(2769): at junit.framework.TestResult.run(TestResult.java:109)
06-05 17:58:09.122: I/TestRunner(2769): at junit.framework.TestCase.run(TestCase.java:118)
06-05 17:58:09.122: I/TestRunner(2769): at android.test.AndroidTestRunner.runTest(AndroidTestRunner.java:169)
06-05 17:58:09.122: I/TestRunner(2769): at android.test.AndroidTestRunner.runTest(AndroidTestRunner.java:154)
06-05 17:58:09.122: I/TestRunner(2769): at android.test.InstrumentationTestRunner.onStart(InstrumentationTestRunner.java:529)
06-05 17:58:09.122: I/TestRunner(2769): at android.app.Instrumentation$InstrumentationThread.run(Instrumentation.java:1448)
06-05 17:58:09.132: I/TestRunner(2769): ----- end exception -----
/**
* Adds the node aNewChild to the end of the list of children of this node.
* If the newChild is already in the tree, it is first removed.
* @param aNewChild The node to add.If it is a DocumentFragment object,
* the entire contents of the document fragment are moved
* into the child list of this node
* @return The node added or null.
*/
public Node AddNode(Node aNode, Node aOldNode) {
CustomLog.i(TAG, "AddNode()" );
if (aNode == null) {
CustomLog.e(TAG, "aNode is null!");
return null;
}
if (aOldNode == null) {
CustomLog.e(TAG, "aOldNode is null!");
return null;
}
Document document = aNode.getOwnerDocument();
aOldNode = document.adoptNode(aOldNode);
return aNode.appendChild(aOldNode);
} /* Node AddNode(Node aNode, Node aOldNode) **/
据我所知,importNode是一个有缺陷的函数,我还可以使用什么来将节点添加到节点?我找到了解决方案,它对我有效,下面是一个修改过的函数,它可以将节点添加到节点而不引发任何异常:
06-05 17:58:09.111: I/TestRunner(2769): ----- begin exception -----
06-05 17:58:09.122: I/TestRunner(2769): org.w3c.dom.DOMException
06-05 17:58:09.122: I/TestRunner(2769): at org.apache.harmony.xml.dom.NodeImpl.setNameNS(NodeImpl.java:227)
06-05 17:58:09.122: I/TestRunner(2769): at org.apache.harmony.xml.dom.ElementImpl.<init>(ElementImpl.java:50)
06-05 17:58:09.122: I/TestRunner(2769): at org.apache.harmony.xml.dom.DocumentImpl.createElementNS(DocumentImpl.java:336)
06-05 17:58:09.122: I/TestRunner(2769): at org.apache.harmony.xml.dom.DocumentImpl.shallowCopy(DocumentImpl.java:156)
06-05 17:58:09.122: I/TestRunner(2769): at org.apache.harmony.xml.dom.DocumentImpl.cloneOrImportNode(DocumentImpl.java:208)
06-05 17:58:09.122: I/TestRunner(2769): at org.apache.harmony.xml.dom.DocumentImpl.importNode(DocumentImpl.java:222)
06-05 17:58:09.122: I/TestRunner(2769): at com.fido.android.framework.service.XMLDOMNode.AddNode(XMLDOMNode.java:108)
06-05 17:58:09.122: I/TestRunner(2769): at com.fido.android.test.framework.service.XMLDOMNodeTest.testAddNodeNodeNode(XMLDOMNodeTest.java:89)
06-05 17:58:09.122: I/TestRunner(2769): at java.lang.reflect.Method.invokeNative(Native Method)
06-05 17:58:09.122: I/TestRunner(2769): at java.lang.reflect.Method.invoke(Method.java:507)
06-05 17:58:09.122: I/TestRunner(2769): at junit.framework.TestCase.runTest(TestCase.java:154)
06-05 17:58:09.122: I/TestRunner(2769): at junit.framework.TestCase.runBare(TestCase.java:127)
06-05 17:58:09.122: I/TestRunner(2769): at junit.framework.TestResult$1.protect(TestResult.java:106)
06-05 17:58:09.122: I/TestRunner(2769): at junit.framework.TestResult.runProtected(TestResult.java:124)
06-05 17:58:09.122: I/TestRunner(2769): at junit.framework.TestResult.run(TestResult.java:109)
06-05 17:58:09.122: I/TestRunner(2769): at junit.framework.TestCase.run(TestCase.java:118)
06-05 17:58:09.122: I/TestRunner(2769): at android.test.AndroidTestRunner.runTest(AndroidTestRunner.java:169)
06-05 17:58:09.122: I/TestRunner(2769): at android.test.AndroidTestRunner.runTest(AndroidTestRunner.java:154)
06-05 17:58:09.122: I/TestRunner(2769): at android.test.InstrumentationTestRunner.onStart(InstrumentationTestRunner.java:529)
06-05 17:58:09.122: I/TestRunner(2769): at android.app.Instrumentation$InstrumentationThread.run(Instrumentation.java:1448)
06-05 17:58:09.132: I/TestRunner(2769): ----- end exception -----
/**
* Adds the node aNewChild to the end of the list of children of this node.
* If the newChild is already in the tree, it is first removed.
* @param aNewChild The node to add.If it is a DocumentFragment object,
* the entire contents of the document fragment are moved
* into the child list of this node
* @return The node added or null.
*/
public Node AddNode(Node aNode, Node aOldNode) {
CustomLog.i(TAG, "AddNode()" );
if (aNode == null) {
CustomLog.e(TAG, "aNode is null!");
return null;
}
if (aOldNode == null) {
CustomLog.e(TAG, "aOldNode is null!");
return null;
}
Document document = aNode.getOwnerDocument();
aOldNode = document.adoptNode(aOldNode);
return aNode.appendChild(aOldNode);
} /* Node AddNode(Node aNode, Node aOldNode) **/
我只使用aOldNode=document.adaptenodeaoldnode;不是aOldNode=document.importNodeaOldNode,而是true;方法