昨天，有个小需求，要将一些xml文件中的内容进行替换，为了省时间，写了个小程序进行处理 ^_^,记录下，以备不时之需！

package com.bbwl; import java.io.BufferedReader; import java.io.BufferedWriter; import java.io.FileReader; import java.io.FileWriter; import java.text.SimpleDateFormat; import java.util.Calendar; import java.util.Scanner; import java.util.regex.Matcher; import java.util.regex.Pattern; public class FileTest { public static void main(String[] args){ changeContent(); } public static void changeContent() { String filePath = null; Scanner scanner = new Scanner(System.in); filePath = scanner.nextLine(); FileReader fileReader = null; BufferedReader reader = null; FileWriter fileWriter = null; BufferedWriter writer = null; try { StringBuffer bufferOriginal = new StringBuffer(); StringBuffer bufferNew = new StringBuffer(); int dotIndex = filePath.lastIndexOf("."); Calendar calendar = Calendar.getInstance(); SimpleDateFormat simpleFormat = new SimpleDateFormat("yyyyMMdd"); String destinationFilePath = filePath.substring(0,dotIndex) + "-" + simpleFormat.format(calendar.getTime()) + filePath.substring(dotIndex); fileWriter = new FileWriter(destinationFilePath); writer = new BufferedWriter(fileWriter); fileReader = new FileReader(filePath); reader = new BufferedReader(fileReader); String original = ""; String destination = ""; while((original = reader.readLine())!=null){ destination = original; if(original.contains("<isNotNull")){ int splitIndex = original.indexOf(">"); String partOne = original.substring(0,splitIndex); String partTwo = original.substring(splitIndex); String property = partOne.substring(partOne.indexOf("property")).split("\"")[1]; destination = partOne.substring(0,partOne.indexOf("<isNotNull")) + "<if test=\"" + property + " != null\"" + partTwo; System.out.println("property=" + property); System.out.println(destination); } if(original.contains("</isNotNull>")){ destination = destination.replaceAll("</isNotNull>","</if>"); } String regex = "#([^#}]+)#"; Pattern pattern = Pattern.compile(regex); Matcher matcher = pattern.matcher(destination); while(matcher.find()){ String replaceWord = matcher.group(0); String replaceWordValue = matcher.group(1); System.out.println("replaceWord: " + replaceWord); System.out.println("replaceWordValue: " + replaceWordValue); int replaceStartIndex = destination.indexOf(replaceWord); int replaceEndIndex = replaceStartIndex + replaceWord.length(); destination = destination.substring(0,replaceStartIndex) + "#{" + replaceWordValue + "}" + destination.substring(replaceEndIndex); System.out.println("pp: " + destination); } writer.write(destination); writer.newLine(); writer.flush(); bufferOriginal.append(original + "\n"); bufferNew.append(destination + "\n"); } System.out.println("Destination filePath: " + destinationFilePath); System.out.println("==== Origial:"); System.out.println("==== Result: "); } catch (Exception e) { e.printStackTrace(); } finally { if (reader != null) { try { reader.close(); } catch (Exception e) { e.printStackTrace(); } } if (fileReader != null) { try { fileReader.close(); } catch (Exception e) { e.printStackTrace(); } } if (writer != null) { try { writer.close(); } catch (Exception e) { e.printStackTrace(); } } if (fileWriter != null) { try { fileWriter.close(); } catch (Exception e) { e.printStackTrace(); } } } } }