如何使用Java合并多個(gè)文件

使用java編程語(yǔ)言，對(duì)文件進(jìn)行操作，合并多個(gè)文件，代碼如下：

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import static java.lang.System.out;

import java.io.FileInputStream;

import java.io.FileOutputStream;

import java.io.IOException;

import java.nio.ByteBuffer;

import java.nio.channels.FileChannel;

import java.util.Arrays;

public class test {

public static final int BUFSIZE = 1024 * 8;

public static void mergeFiles(String outFile, String[] files) {

FileChannel outChannel = null;

out.println("Merge " + Arrays.toString(files) + " into " + outFile);

try {

outChannel = new FileOutputStream(outFile).getChannel();

for(String f : files){

FileChannel fc = new FileInputStream(f).getChannel();

ByteBuffer bb = ByteBuffer.allocate(BUFSIZE);

while(fc.read(bb) != -1){

bb.flip();

用java io流把多個(gè)txt文件的內(nèi)容合并到一個(gè)文件里

參考代碼如下：

public static void mergeFiles(String outFile, String[] files)

第一個(gè)參數(shù)是合并后生成文件的路徑

第二個(gè)參數(shù)是你需要合并的文本文件列表

代碼：

package?org.lq.util;

import?static?java.lang.System.out;

import?java.io.FileInputStream;

import?java.io.FileOutputStream;

import?java.io.IOException;

import?java.nio.ByteBuffer;

import?java.nio.CharBuffer;

import?java.nio.channels.FileChannel;

import?java.nio.charset.Charset;

import?java.nio.charset.CharsetDecoder;

import?java.nio.charset.CharsetEncoder;

import?java.util.Arrays;

public?class?MergeFile?{

public?static?final?int?BUFSIZE?=?1024?*?8;

public?static?void?mergeFiles(String?outFile,?String[]?files)?{

FileChannel?outChannel?=?null;

out.println("Merge?"?+?Arrays.toString(files)?+?"?into?"?+?outFile);

try?{

outChannel?=?new?FileOutputStream(outFile).getChannel();

for(String?f?:?files){

Charset?charset=Charset.forName("utf-8");

CharsetDecoder?chdecoder=charset.newDecoder();

CharsetEncoder?chencoder=charset.newEncoder();

FileChannel?fc?=?new?FileInputStream(f).getChannel();?

ByteBuffer?bb?=?ByteBuffer.allocate(BUFSIZE);

CharBuffer?charBuffer=chdecoder.decode(bb);

ByteBuffer?nbuBuffer=chencoder.encode(charBuffer);

while(fc.read(nbuBuffer)?!=?-1){

bb.flip();

nbuBuffer.flip();

outChannel.write(nbuBuffer);

bb.clear();

nbuBuffer.clear();

}

fc.close();

}

out.println("Merged!!?");

}?catch?(IOException?ioe)?{

ioe.printStackTrace();

}?finally?{

try?{if?(outChannel?!=?null)?{outChannel.close();}}?catch?(IOException?ignore)?{}

}

}

}

java 中IO流操作字符串 兩個(gè)文件中有一些相同的代碼 現(xiàn)在要將兩個(gè)合并成一個(gè) 并且去除相同代碼 祥看補(bǔ)充

你 看 看 這 個(gè) ，是不是符合你的要求

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import java.io.BufferedReader;

import java.io.FileInputStream;

import java.io.FileNotFoundException;

import java.io.IOException;

import java.io.InputStreamReader;

import java.util.ArrayList;

import java.util.List;

public class TestOne {

/**

* @param args

*/

public static void main(String[] args) {

String filepath1 = "F:\\1.txt";

String filepath2 = "F:\\2.txt";

ListString res1txt = null;

ListString res2txt = null;

BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

//輸入連續(xù)的個(gè)數(shù)

System.out.print("Input series string size:");

try {

int temp = Integer.parseInt(br.readLine());

res1txt = readFile(filepath1, temp);

res2txt = readFile(filepath2, temp);

//比較兩個(gè)list中的相同值

for (int i = 0; i res1txt.size(); i++) {

for (int j = 0; j res2txt.size(); j++) {

if(res1txt.get(i).equals(res2txt.get(j))){

System.out.println(res1txt.get(i));

}

}

}

} catch (IOException e) {

e.printStackTrace();

} finally {

try {

if(br != null)

br.close();

} catch (IOException e) {

e.printStackTrace();

}

}

}

/**

* 讀取文件，把結(jié)果以輸入的連續(xù)個(gè)數(shù)分割，并保存在List中

* @param filepath

* @param size

* @return

*/

public static ListString readFile(String filepath, int size){

//如果size不合法，則返回空

if(size = 0)

return null;

ListString list = new ArrayListString();

BufferedReader br = null;

try {

//讀文件

br = new BufferedReader(new InputStreamReader(new FileInputStream(filepath)));

String temp = null;

while((temp = br.readLine()) != null){

for (int i = 0; i temp.length() - size; i++) {

list.add(temp.substring(i, i+size));

}

}

} catch (FileNotFoundException e) {

e.printStackTrace();

} catch (IOException e) {

e.printStackTrace();

} finally {

try {

if(br != null)

br.close();

} catch (IOException e) {

e.printStackTrace();

}

}

return list;

}

}

這里發(fā)不了代碼，只能以文本的形式了

import java.io.BufferedReader;

import java.io.FileInputStream;

import java.io.FileNotFoundException;

import java.io.IOException;

import java.io.InputStreamReader;

import java.util.ArrayList;

import java.util.List;

public class TestOne {

/**

* @param args

*/

public static void main(String[] args) {

String filepath1 = "F:\\1.txt";

String filepath2 = "F:\\2.txt";

ListString res1txt = null;

ListString res2txt = null;

BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

//輸入連續(xù)的個(gè)數(shù)

System.out.print("Input series string size:");

try {

int temp = Integer.parseInt(br.readLine());

res1txt = readFile(filepath1, temp);

res2txt = readFile(filepath2, temp);

//比較兩個(gè)list中的相同值

for (int i = 0; i res1txt.size(); i++) {

for (int j = 0; j res2txt.size(); j++) {

if(res1txt.get(i).equals(res2txt.get(j))){

System.out.println(res1txt.get(i));

}

}

}

} catch (IOException e) {

e.printStackTrace();

} finally {

try {

if(br != null)

br.close();

} catch (IOException e) {

e.printStackTrace();

}

}

}

/**

* 讀取文件，把結(jié)果以輸入的連續(xù)個(gè)數(shù)分割，并保存在List中

* @param filepath

* @param size

* @return

*/

public static ListString readFile(String filepath, int size){

//如果size不合法，則返回空

if(size = 0)

return null;

ListString list = new ArrayListString();

BufferedReader br = null;

try {

//讀文件

br = new BufferedReader(new InputStreamReader(new FileInputStream(filepath)));

String temp = null;

while((temp = br.readLine()) != null){

for (int i = 0; i temp.length() - size; i++) {

list.add(temp.substring(i, i+size));

}

}

} catch (FileNotFoundException e) {

e.printStackTrace();

} catch (IOException e) {

e.printStackTrace();

} finally {

try {

if(br != null)

br.close();

} catch (IOException e) {

e.printStackTrace();

}

}

return list;

}

}