java diff util 1.2.1

package com.javabase; import java.io.BufferedReader; import java.io.FileReader; import java.io.IOException; import java.util.ArrayList; import java.util.LinkedList; import java.util.List; import difflib.DiffRow; import difflib.DiffRowGenerator; public class CompareListUtils { public static final String Result_EQUAL = "EQUAL"; public static final String Result_INSERT = "INSERT"; public static final String Result_DELETE = "DELETE"; public static final String Result_CHANGE = "CHANGE"; /*** * * @param filename * @return */ private static List<String> fileToLines(String filename) { List<String> lines = new LinkedList<String>(); String line = ""; try { BufferedReader in = new BufferedReader(new FileReader(filename)); while ((line = in.readLine()) != null) { lines.add(line); } } catch (IOException e) { e.printStackTrace(); } return lines; } /*** * 对文件进行比较 * INSERT, DELETE, CHANGE, EQUAL * @param fromFileName 原来的文件名 * @param toFileName 新的文件名 */ public static List<CompareMo> compareAll(String fromFileName, String toFileName) { List<String> original = fileToLines(fromFileName); List<String> revised = fileToLines(toFileName); final DiffRowGenerator.Builder builder = new DiffRowGenerator.Builder(); final DiffRowGenerator dfg = builder.build(); final List<DiffRow> rows = dfg.generateDiffRows(original, revised); List<CompareMo> listCompareMo = new ArrayList<CompareMo>(); int i=1; int oldSize = original.size(); int newSize = revised.size(); int insertSize = 0; int deleteSize = 0; for (final DiffRow diffRow : rows) { String tag = diffRow.getTag().toString(); String oldLine = diffRow.getOldLine(); String newLine = diffRow.getNewLine(); if(Result_CHANGE.equals(tag)){ boolean isInset = false; if ((i-insertSize) <= oldSize) { if(oldLine!=null&& oldLine.trim().length()==0){ if(!original.get(i-1-insertSize).equals(oldLine)){ tag = Result_INSERT; isInset = true; insertSize ++; } } } if (!isInset) { if ((i-deleteSize) <= newSize) { if(newLine!=null&& newLine.trim().length()==0){ if(!revised.get(i-1-deleteSize).equals(oldLine)){ tag = Result_DELETE; isInset = true; deleteSize ++; } } } } } listCompareMo.add(new CompareMo( i, oldLine, newLine, tag )); i++; } return listCompareMo; } public static void main(String[] args) { List<CompareMo> compares = CompareListUtils.compareAll( "D:/worksp/javabase/src/com/javabase/TestThreadLocal.java", "D:/worksp/javabase/src/com/javabase/aoptest/TestThreadLocal.java"); for (CompareMo compare : compares) { System.out.println(compare.getTag()+compare.getNewLine()+compare.getOldLine()); } } }