java IO代码问题：将两个txt文件内容分别去重并去除重复内容后写入到另外两个txt文件，下面代码根本写不进
import java.util.*;
import java.io.*;
public class ResortByDel {
@SuppressWarnings("unchecked")
public void ResortToTemp(String firstFile,String secondFile,String tempPath1,String tempPath2)throws IOException{
//String oldPath = oldFolderPath;
File f1 = new File(firstFile);
File f2 = new File(secondFile);
String str1 = null;
String str2=null;
String string1 = null;
String string2=null;
Vector vector1 = new Vector();////定义容器类对象
Vector vector2 = new Vector();////定义容器类对象
//boolean IsRepeat = false;
try{
BufferedReader reader1 = new BufferedReader(new FileReader(f1));
BufferedReader reader2 = new BufferedReader(new FileReader(f2));
while((str1=reader1.readLine())!= null&&(str2=reader2.readLine())!=null){
for(int i=0;i<vector1.size();i++){
for(int j=0;j<vector2.size();j++){
string1 = (String)vector1.elementAt(i);
string2 = (String)vector2.elementAt(i);
if(string1.equals(str1.trim())){//去掉前后空格后比较
break;
}else{
vector1.add(str1.trim());
}
if(string2.equals(str2.trim())||string2.equals(str1.trim())){//去掉前后空格后比较
// IsRepeat = true;
break;
}else{
vector2.add(str2.trim());
}
}
}
}
reader1.close();
reader2.close();
}catch(IOException e)
{
e.printStackTrace();
}
//写入文件
String newFile1 = tempPath1;
String newFile2=tempPath2;
File tempFile1 = new File(newFile1);
File tempFile2 = new File(newFile2);
if(tempFile1.exists()){
tempFile1.delete();
}
if(tempFile2.exists()){
tempFile2.delete();
}
tempFile1.createNewFile();
tempFile2.createNewFile();
try{
BufferedWriter writer1 = new BufferedWriter(new FileWriter(tempFile1,true));
BufferedWriter writer2 = new BufferedWriter(new FileWriter(tempFile2,true));
for(int i=0;i<vector1.size();i++){
str1 = (String)vector1.elementAt(i);
writer1.write(str1);
writer1.newLine();
writer1.flush();
}
for(int i=0;i<vector2.size();i++){
str2 = (String)vector2.elementAt(i);
writer2.write(str2);
writer2.newLine();
writer2.flush();
}
writer1.close();
writer2.close();
}catch(IOException e){
e.printStackTrace();
}
}
public static void main(String[] args)throws IOException{
String tempPath1 = "D:\\tmp\\test1.txt";
String tempPath2 = "D:\\tmp\\test2.txt";
//String sourceFolder = "D:/tmp/tmp";
String resultPath1 = "D:\\tmp\\result1.txt";
String resultPath2 = "D:\\tmp\\result2.txt";
//File tempFile = new File(tempPath);
ResortByDel resort = new ResortByDel();
// resort.AllResortToTemp(sourceFolder,tempPath);//首先放到temp.txt，然后删除
resort.ResortToTemp(tempPath1,tempPath2,resultPath1,resultPath2);//把temp文件再去重放入result文件
//resort.DelTemp(tempPath);//删除temp.txt中转文件
System.out.println("OK");
}
}
[解决办法]
Vector vector1 = new Vector();// //定义容器类对象
Vector vector2 = new Vector();// //定义容器类对象
for (int i = 0; i < vector1.size(); i++) {
for (int j = 0; j < vector2.size(); j++) {
你们还没有个容器里面写入任何东西呢，2个for循环永远都不会进，所以2容器永远是空。建议先对该容器初始化
[解决办法]
package csdn.bugs;
import java.util.*;
import java.io.*;
public class ResortByDel {
@SuppressWarnings("unchecked")
public void ResortToTemp(String firstFile, String secondFile,
String tempPath1, String tempPath2) throws IOException {
// String oldPath = oldFolderPath;
File f1 = new File(firstFile);
File f2 = new File(secondFile);
String str1 = null;
String str2 = null;
String string1 = null;
String string2 = null;
Vector vector1 = new Vector();// //定义容器类对象
Vector vector2 = new Vector();// //定义容器类对象
// boolean IsRepeat = false;
try {
BufferedReader reader1 = new BufferedReader(new FileReader(f1));
BufferedReader reader2 = new BufferedReader(new FileReader(f2));
while ((str1 = reader1.readLine()) != null
&& (str2 = reader2.readLine()) != null) {
if(!vector1.contains(str1)){
vector1.add(str1);
}
if(!vector2.contains(str2)){
vector2.add(str2);
}
}
reader1.close();
reader2.close();
} catch (IOException e) {
e.printStackTrace();
}
// 写入文件
String newFile1 = tempPath1;
String newFile2 = tempPath2;
File tempFile1 = new File(newFile1);
File tempFile2 = new File(newFile2);
if (tempFile1.exists()) {
tempFile1.delete();
}
if (tempFile2.exists()) {
tempFile2.delete();
}
tempFile1.createNewFile();
tempFile2.createNewFile();
try {
BufferedWriter writer1 = new BufferedWriter(new FileWriter(
tempFile1, true));
BufferedWriter writer2 = new BufferedWriter(new FileWriter(
tempFile2, true));
for (int i = 0; i < vector1.size(); i++) {
str1 = (String) vector1.elementAt(i);
writer1.write(str1);
writer1.newLine();
writer1.flush();
}
for (int i = 0; i < vector2.size(); i++) {
str2 = (String) vector2.elementAt(i);
writer2.write(str2);
writer2.newLine();
writer2.flush();
}
writer1.close();
writer2.close();
} catch (IOException e) {
e.printStackTrace();
}
}
public static void main(String[] args) throws IOException {
String tempPath1 = "D:\\tmp\\test1.txt";
String tempPath2 = "D:\\tmp\\test2.txt";
// String sourceFolder = "D:/tmp/tmp";
String resultPath1 = "D:\\tmp\\result1.txt";
String resultPath2 = "D:\\tmp\\result2.txt";
// File tempFile = new File(tempPath);
ResortByDel resort = new ResortByDel();
// resort.AllResortToTemp(sourceFolder,tempPath);//首先放到temp.txt，然后删除
resort.ResortToTemp(tempPath1, tempPath2, resultPath1, resultPath2);// 把temp文件再去重放入result文件
// resort.DelTemp(tempPath);//删除temp.txt中转文件
System.out.println("OK");
}
}
package com.wwy.io;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
public class CopyFile {
/**
* @param args
*/
@SuppressWarnings("unchecked")
public static void main(String[] args) {
// TODO Auto-generated method stub
List<List> mylist = read();
List<List> my = read();
List<String> l1 = repetition(mylist.get(0), mylist.get(1));
List<String> l2 = repetition(my.get(1),my.get(0));
write(l1,l2);
System.out.println("ok");
}
public static List<List> read(){
File f1 = new File("D:\\a\\test1.txt");
File f2 = new File("D:\\a\\test2.txt");
List<List> mylist = new ArrayList<List>();
List<String> l1 = new ArrayList<String>();
List<String> l2 = new ArrayList<String>();
String str1 = "";
String str2 = "";
BufferedReader br1 = null;
BufferedReader br2 = null;
try {
br1 = new BufferedReader(new FileReader(f1));
br2 = new BufferedReader(new FileReader(f2));
while((str1 = br1.readLine() ) != null ){// (str2 = br2.readLine()) != null){
l1.add(str1);
}
while((str2 = br2.readLine()) != null){
l2.add(str2);
}
mylist.add(l1);
mylist.add(l2);
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}finally{
try {
if(br1 != null){
br1.close();
br1 = null;
}
if(br2 != null){
br2.close();
br2 = null;
}
} catch (Exception e2) {
// TODO: handle exception
}
}
return mylist;
}
public static List<String> repetition(List<String> l1,List<String> l2){
for(int i = 0; i < l1.size(); i++){
for(int j = 0;j<l2.size();j++){
if(l2.get(j) .equals(l1.get(i))){
System.out.println("sdgsad======" + l1.get(i));
l1.remove(i);
}
}
}
/*for(String str1 :l1){
System.out.println("str1 : " + str1);
for(String str2 : l2){
System.out.println("str2 : " + str2);
if(str1.equals(str2)){
System.out.println("222 2 " + str1);
//int index = l1.indexOf(str1);
l1.remove(str1);
System.out.println("============ " + l1.remove(str1) );
}
}
}*/
return l1;
}
public static void write(List<String> l1,List<String> l2){
File f1 = new File("D:\\a\\result1.txt");
File f2 = new File("D:\\a\\result2.txt");
BufferedWriter bw1 = null;
BufferedWriter bw2 = null;
try {
bw1 = new BufferedWriter(new FileWriter(f1));
bw2 = new BufferedWriter(new FileWriter(f2));
for(int i = 0;i < l1.size();i++){
bw1.write(l1.get(i) + "\n");
}
for(int i = 0;i < l1.size();i++){
bw2.write(l2.get(i) + "\n");
}
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}finally{
try {
if(bw1 != null){
bw1.close();
bw1 = null;
}
if(bw2 != null){
bw2.close();
bw2 = null;
}
} catch (Exception e2) {
// TODO: handle exception
}
}
}
}
