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java合并两个txt文件并生成新txt
import java.io.File;
import java.io.PrintStream;
import java.util.Scanner;
/**
* 2015年11月18日上午9:31:05
*
* @author cs2110 TODO 合并数组
*
*/
public class MergeFile {
private String afile = "D:/1.txt";
private String bfile = "D:/2.txt";
private String mergefile = "D:/3.txt";
/**
* 读取文件里面的整数
*
* @param input
* Scanner对象
* @return 返回整形数组
*/
public int[] readFile(Scanner input) {
try {
String temp = "";
while (input.hasNextInt()) {
temp += input.nextInt() + ",";
}
String[] nums = temp.split(",");
int[] arr = new int[nums.length];
for (int index = 0; index nums.length; index++) {
arr[index] = Integer.parseInt(nums[index]);
}
return arr;
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
/**
* 合并数组
*
* @param a
* 数组1
* @param b
* 数组2
* @return 整形数组
*/
public int[] merge(int[] a, int[] b) {
int len = a.length;
if (b.length len) {
len = b.length;
}
int[] all = new int[a.length + b.length];
int index = 0;
int aIndex = 0;
int bIndex = 0;
while (aIndex len || bIndex len) {
if (a[aIndex] b[bIndex]) {
all[index] = a[aIndex];
aIndex++;
} else {
all[index] = b[bIndex];
bIndex++;
}
index++;
}
if (aIndex a.length) {
while (aIndex a.length) {
all[index++] = a[aIndex++];
}
} else {
while (bIndex b.length) {
all[index++] = b[bIndex++];
}
}
return all;
}
/**
* 写入文件
*
* @param print
* PrintStream
* @param a
* 数组
*/
public void writeFile(PrintStream print, int[] a) {
for (int index = 0; null != a index a.length; index++) {
print.append(a[index] + "\r\n");
}
}
public static void main(String[] args) {
MergeFile merge = new MergeFile();
if (null != args args.length 2) {// 输入参数合法,则使用,否则按照默认
merge.afile = args[0];
merge.bfile = args[1];
merge.mergefile = args[2];
} else {
System.out.println("Using the default file");
}
Scanner input = null;
int[] a = null;
int[] b = null;
int[] all = null;
try {
input = new Scanner(new File(merge.afile));
a = merge.readFile(input);
input = new Scanner(new File(merge.bfile));
b = merge.readFile(input);
all = merge.merge(a, b);
PrintStream print = new PrintStream(new File(merge.mergefile));
merge.writeFile(print, all);
} catch (Exception e) {
e.printStackTrace();
}
}
}
如何通过java将多个word文档合成一个wor
国内有个免费的jar（Free Spire.Doc for Java）,可用来合并Word文档，分两种合并方法：1.合并的内容新起一页；2.合并的内容承接上文段落。
1.新起一页合并
import com.spire.doc.Document;
import com.spire.doc.FileFormat;
public class MergeWordDocument {
public static void main(String[] args){
//获取第一个文档的路径
String filePath1 = "merge1.docx";
//获取第二个文档的路径
String filePath2 = "merge2.docx";
//加载第一个文档
Document document = new Document(filePath1);
//使用insertTextFromFile方法将第二个文档的内容插入到第一个文档
document.insertTextFromFile(filePath2, FileFormat.Docx_2013);
//保存文档
document.saveToFile("Output.docx", FileFormat.Docx_2013);
}
}
2.承接上文段落合并
import com.spire.doc.Document;
import com.spire.doc.DocumentObject;
import com.spire.doc.FileFormat;
import com.spire.doc.Section;
public class MergeWordDocument {
public static void main(String[] args){
//获取第一个文档的路径
String filePath1 = "merge1.docx";
//获取第二个文档的路径
String filePath2 = "merge2.docx";
//加载第一个文档
Document document1 = new Document(filePath1);
//加载第二个文档
Document document2 = new Document(filePath2);
//获取第一个文档的最后一个section
Section lastSection = document1.getLastSection();
//将第二个文档的段落作为新的段落添加到第一个文档的最后一个section
for (Section section:(Iterable Section)document2.getSections()) {
for (DocumentObject obj:(Iterable DocumentObject)section.getBody().getChildObjects()
) {
lastSection.getBody().getChildObjects().add(obj.deepClone());
}
}
//保存文档
document1.saveToFile("Output.docx", FileFormat.Docx_2013);
}
}
可参考原文。
Java如何高效合并多个文件
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();
outChannel.write(bb);
bb.clear();
}
fc.close();
}
out.println("Merged!! ");
} catch (IOException ioe) {
ioe.printStackTrace();
} finally {
try {if (outChannel != null) {outChannel.close();}} catch (IOException ignore) {}
}
}
public static void main(String[] args) {
mergeFiles("D:/output.txt", new String[]{"D:/in_1.txt", "D:/in_2.txt", "D:/in_3.txt"});
}
}
如何使用Java合并多个文件
使用java编程语言，对文件进行操作，合并多个文件，代码如下：
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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();
