package test20140709; import java.io.BufferedReader; import java.io.File; import java.io.FileReader; import java.io.IOException; import java.util.ArrayList; import java.util.List; /** * 以行为单位读取文件并比对,显示不同行 * @author fushihua-wb * @date 2014-7-11 */ public class compare { /** * 以行为单位读取文件,经常使用于读面向行的格式化文件 */ private static String[] readFileByLines(String fileName) { File file = new File(fileName); BufferedReader reader = null; String ss[] = new String[0]; int i = 0; try { System.out.println("以行为单位读取文件内容,一次读一整行:"); reader = new BufferedReader(new FileReader(file)); String tempString = null; int line = 1; // 一次读入一行,直到读入null为文件结束 while ((tempString = reader.readLine()) != null) { // 显示行号 // if(tempString.contains("<url-pattern>")){ // //System.out.println("line " + line + ": " + // tempString); // //System.out.println("line " + line + ": " + // tempString.trim()); // //System.out.println(tempString.trim()); // ss = insert(ss, tempString.trim()); // i++; // } // System.out.println("line " + line + ": " + tempString); ss = insert(ss, tempString.trim()); i++; line++; } reader.close(); } catch (IOException e) { e.printStackTrace(); } finally { if (reader != null) { try { reader.close(); } catch (IOException e1) { } } System.out.println("共" + i + "行"); System.out.println("START"); // for (String string : ss) { // System.out.println(string); // } // for (int j = 0;j <= ss.length;j++) { // System.out.println(ss[j]); // } System.out.println("END"); } return ss; } /* * 插入到数组 */ private static String[] insert(String[] arr, String str) { int size = arr.length; String[] tmp = new String[size + 1]; System.arraycopy(arr, 0, tmp, 0, size); tmp[size] = str; return tmp; } // 删除数组中当中一个元素 public static String[] delString(String[] str, String delString) { // String [] str = {"Java", "C++", "Php", "C#", "Python"}; // for (String elementA:str ) { // System.out.print(elementA + " "); // } // 删除php List<String> list = new ArrayList<String>(); for (int i = 0; i < str.length; i++) { list.add(str[i]); } // list.remove(2); list.remove(delString); // System.out.println(); String[] newStr = list.toArray(new String[1]); // 返回一个包括全部对象的指定类型的数组 // for (String elementB:newStr ) { // System.out.print(elementB + " "); // } // System.out.println(); return newStr; } /* * 输出两个数组同样元素 */ private static void compare(String fileName1, String fileName2) { String[] ss1 = readFileByLines(fileName1); String[] ss2 = readFileByLines(fileName2); for (String s1 : ss1) { for (String s2 : ss2) { if (s1.endsWith(s2)) { System.out.println(s1); } } } for (String s1 : ss2) { System.out.println(s1); } } /* * 输出两个数组不同元素 */ public static void compare1(String fileName1, String fileName2) { // String a[] = new String[]{"a","a2","b3"}; // String b[] = new String[]{"b","b3","a2"}; System.out.println("START"); String[] a = readFileByLines(fileName1); String[] b = readFileByLines(fileName2); ArrayList c = new ArrayList(); for (int i = 0; i < a.length; i++) { for (int j = 0; j < b.length; j++) { if (a[i].equals(b[j])) { c.add(a[i]); } } } System.out.println("仅仅在" + fileName1 + "中:"); for (int i = 0; i < a.length; i++) { if (!c.contains(a[i])) { System.out.println(a[i] + ""); } } System.out .println("----------------------------------------------------"); System.out.println("仅仅在" + fileName2 + "中:"); for (int i = 0; i < a.length; i++) { if (!c.contains(b[i])) { System.out.println(b[i] + ""); } } System.out.println("END"); } public static void main(String[] args) { // readFileByLines("D:\web-release.xml"); // readFileByLines("D:\web-prod.xml"); // readFileByLines("D:\web-prod1.xml"); // compare1("D:\web-prod1.xml","D:\web-release1.xml"); compare1("D:\web-release1.xml", "D:\web-prod1.xml"); } }
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