合并两个文本文件，并删除合并后重复的行
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.InputStreamReader;
import java.util.Vector;
public class CleanFiles {
private static Vector stringlist;
public static void main(String[] args) throws Exception {
String filePath1;
String filePath2;
String filePath3;
String item;
stringlist = new Vector();
BufferedReader buffer = new BufferedReader(new InputStreamReader(
System.in));
System.out.println("请输入文件1路径和文件名：");
filePath1 = buffer.readLine();
System.out.println("请输入文件2路径和文件名：");
filePath2 = buffer.readLine();
System.out.println("请输入合并后文件路径和文件名");
filePath3 = buffer.readLine();
File file1 = new File(filePath1);
File file2 = new File(filePath2);
File file3 = new File(filePath3);
buffer.close();
buffer = new BufferedReader(new FileReader(file1));
while((item=buffer.readLine())!=null){
addString(stringlist,item);
}
buffer.close();
buffer = new BufferedReader(new FileReader(file2));
while((item= buffer.readLine())!=null){
addString(stringlist,item);
}
buffer.close();
// 搜索结果是经过排序的，根据此规律删除不合要求File
for (int i = 0; i < stringlist.size()-1; i++) {
if(stringlist.get(i).equals(stringlist.get(i+1))){
stringlist.remove(i);
if(i!=0)i--;
}
}
BufferedWriter bufferWriter = new BufferedWriter(new FileWriter(file3));
for(String temp:stringlist){
bufferWriter.write(temp);
bufferWriter.newLine();
}
bufferWriter.close();
}
public static void addString(Vector allStrings, String str) {
if (allStrings.isEmpty()) {
allStrings.add(str);
} else {
// 二分查找法
int left = 0, right = allStrings.size() - 1, middle, compare;
if (pareToIgnoreCase(allStrings.get(right)) >= 0) {
allStrings.add(str);
return;
}
if (pareToIgnoreCase(allStrings.get(0)) <= 0) {
allStrings.add(0, str);
return;
}
while (true) {
middle = (left + right) / 2;
compare = pareToIgnoreCase(allStrings.get(middle));
if (compare == 0 || middle == left) {
allStrings.add(middle + 1, str);
return;
} else {
if (compare < 0) {
right = middle;
} else {
left = middle;
}
}
}
}
}
}
