Java SAX解析器 - 修改XML文檔
演示示例
這是我們需要通過修改XML輸入文件附加
在****標記結束
SAXModifyDemo.java
package com.yiibai.xml; import java.io.*; import org.xml.sax.*; import javax.xml.parsers.*; import org.xml.sax.helpers.DefaultHandler; public class SAXModifyDemo extends DefaultHandler { static String displayText[] = new String[1000]; static int numberLines = 0; static String indentation = ""; public static void main(String args[]) { try { File inputFile = new File("input.txt"); SAXParserFactory factory = SAXParserFactory.newInstance(); SAXModifyDemo obj = new SAXModifyDemo(); obj.childLoop(inputFile); FileWriter filewriter = new FileWriter("newfile.xml"); for(int loopIndex = 0; loopIndex < numberLines; loopIndex++){ filewriter.write(displayText[loopIndex].toCharArray()); filewriter.write('\n'); System.out.println(displayText[loopIndex].toString()); } filewriter.close(); } catch (Exception e) { e.printStackTrace(System.err); } } public void childLoop(File input){ DefaultHandler handler = this; SAXParserFactory factory = SAXParserFactory.newInstance(); try { SAXParser saxParser = factory.newSAXParser(); saxParser.parse(input, handler); } catch (Throwable t) {} } public void startDocument() { displayText[numberLines] = indentation; displayText[numberLines] += ""; numberLines++; } public void processingInstruction(String target, String data) { displayText[numberLines] = indentation; displayText[numberLines] += " 0) { displayText\[numberLines\] += ' '; displayText\[numberLines\] += data; } displayText\[numberLines\] += "?>"; numberLines++; } public void startElement(String uri, String localName, String qualifiedName, Attributes attributes) { displayText[numberLines] = indentation; indentation += " "; displayText[numberLines] += '<'; displayText[numberLines] += qualifiedName; if (attributes != null) { int numberAttributes = attributes.getLength(); for (int loopIndex = 0; loopIndex < numberAttributes; loopIndex++){ displayText[numberLines] += ' '; displayText[numberLines] += attributes.getQName(loopIndex); displayText[numberLines] += "=\""; displayText[numberLines] += attributes.getValue(loopIndex); displayText[numberLines] += '"'; } } displayText[numberLines] += '>'; numberLines++; } public void characters(char characters[], int start, int length) { String characterData = (new String(characters, start, length)).trim(); if(characterData.indexOf("\n") < 0 && characterData.length() > 0) { displayText[numberLines] = indentation; displayText[numberLines] += characterData; numberLines++; } } public void endElement(String uri, String localName, String qualifiedName) { indentation = indentation.substring(0, indentation.length() - 4) ; displayText[numberLines] = indentation; displayText[numberLines] += "</"; displayText[numberLines] += qualifiedName; displayText[numberLines] += '>'; numberLines++; if (qualifiedName.equals("marks")) { startElement("", "Result", "Result", null); characters("Pass".toCharArray(), 0, "Pass".length()); endElement("", "Result", "Result"); } } }
這將產生以下結果：