SAXReader用法.docVIP

SAXReader用法 - 技術(shù)1.怎樣獲取環(huán)境變量 這個(gè)以前轉(zhuǎn)載過一段程序，詳見 /logs/16503246.html 好用的獲取環(huán)境變量的java靜態(tài)方法 - 技術(shù)Tag：java 環(huán)境變量 獲取 方法 版權(quán)聲明：轉(zhuǎn)載時(shí)請(qǐng)以超鏈接形式標(biāo)明文章原始出處和作者信息及本聲明/logs/16503246.html public static String getEnv(String envKey) Properties prop = new Properties(); try String OS = System.getProperty().toLowerCase(); Process p = null; /get system environment if (OS.indexOf(windows) -1) p = Runtime.getRuntime().exec(cmd /c set); BufferedReader br = new BufferedReader(new InputStreamReader(p .getInputStream(); String line; while (line = br.readLine() != null) int i = line.indexOf(=); if (i -1) String key = line.substring(0, i); String value = line.substring(i + 1); prop.setProperty(key, value); return prop.getProperty(envKey); catch (Exception e) return null; */* * 獲取環(huán)境變量的java靜態(tài)方法 * 獲得主機(jī)操作系統(tǒng)的名稱 windows 2003 * Process 進(jìn)程 * 如果是windows系統(tǒng)，獲得系統(tǒng)下的環(huán)境變量 * 將環(huán)境變量寫入流，循環(huán)讀取key 和 value * 把key 和 value放進(jìn)Properties，作為屬性封裝 * param envKey * return */public static String getEnv(String envKey) Properties prop = new Properties();try String OS = System.getProperty().toLowerCase();/主機(jī)操作系統(tǒng)的名稱 Process p = null;/ get system environmentif (OS.indexOf(windows) -1) p = Runtime.getRuntime().exec(cmd /c set);BufferedReader br = new BufferedReader(new InputStreamReader(p.getInputStream();String line;while (line = br.readLine() != null) /System.out.println(br.readLine()=+br.readLine();/System.out.println(line=+line);int i = line.indexOf(=);if (i -1) String key = line.substring(0, i);String value = line.substring(i + 1);prop.setProperty(key, value);/System.out.println(key=+key);/System.out.println(value=+value);return prop.getProperty(envKey); catch (Exception e) return null;*2. 怎樣根據(jù)模板生成一個(gè)XML文件（根據(jù)xml模板文件在指定路徑下生成新的xml文件）需要用到如下兩個(gè)jar包（dom4j-1.6.1和jaxen-1.1-beta-6）/files/12068793981.jar/files/12068793980.jar private void genXMLFile() try String nwdir = “C:workDir”;/指定一個(gè)輸出路徑 SAXReader reader = new SAXReader(); /使用SAXReader 解析器 InputStream isrt = this.getClass().getResourceAsStream(templ.xml); /讀取當(dāng)前路徑下的xml模板文件，在jar包下運(yùn)行也沒問題！ Document doc = reader.read(isrt); List projects=doc.selectNodes(/preferences/category/preference);/快速定位xml中的節(jié)點(diǎn) Iterator it=projects.iterator(); while(it.hasNext() Element elm=(Element)it.next(); Attribute attribute=elm.attribute(name); String nodename = attribute.getValue(); if(nodename.equals(CAE_batch_meshing_root_dir) updateVal(elm,nwdir); OutputFormat format = new OutputFormat( , true);/使用format可以換行排版 XMLWriter writer = new XMLWriter(new FileWriter(nwdir+Preferences.xml),format);/生成新的xml文件 writer.write(doc); writer.close(); catch (DocumentException e) / TODO Auto-generated catch block e.printStackTrace(); catch (IOException e) / TODO Auto-generated catch block e.printStackTrace(); private void updateVal(Element elm,String newStr) List nodes = elm.elements(context);/context為xml中的節(jié)點(diǎn) for (Iterator i = nodes.iterator(