这种方法好点：
package cglib;
import java.io.File;
import java.io.FileReader; import java.io.FileWriter; public class StringNumber { public static void main(String args[]) throws Exception{ FileManager a=new FileManager("D:\\文件\\QC处理\\2016年11月\\a.txt",new char[]{'\n'}); FileManager b=new FileManager("D:\\文件\\QC处理\\2016年11月\\b.txt",new char[]{' ','\n'}); FileWriter c=new FileWriter("D:\\文件\\QC处理\\2016年11月\\c.txt"); String aWord = null; String bWord = null; while ((aWord = a.nextWord()) != null) { c.write(aWord); bWord = b.nextWord(); if (bWord != null) { c.write(bWord); } } if (bWord != null) { c.write(bWord); } c.close(); System.out.println("finish"); } }class FileManager{
String[] words = null; int pos = 0; @SuppressWarnings("resource") public FileManager(String fileName, char spilt[]) throws Exception { File file = new File(fileName); FileReader fr = new FileReader(file); char buf[] = new char[(int) file.length()]; int len = fr.read(buf); String bufString = new String(buf, 0, len); StringBuffer temp = new StringBuffer(""); temp.append(spilt[0]); if (spilt.length > 1) { int posl = 2; while (posl <= spilt.length) { temp.append("|"); temp.append(spilt[posl - 1]); posl++; } } String bs = temp.toString(); words = bufString.split(bs); } public String nextWord() { if (pos == words.length) { return null; } else { return words[pos++]; } } }
第二种：
package cglib;
import java.io.File;
import java.io.FileReader; import java.io.FileWriter; public class StringNumber { public static void main(String args[]) throws Exception{ try{ FileManager a=new FileManager("D:\\文件\\QC处理\\2016年11月\\a.txt",new char[]{'\n'}); FileManager b=new FileManager("D:\\文件\\QC处理\\2016年11月\\b.txt",new char[]{' ','\n'}); FileWriter c=new FileWriter("D:\\文件\\QC处理\\2016年11月\\c.txt"); String aWord= null; String bWord= null; //读取一个aWord,调用c写入,读取一个bWord，调用 c写入 while((aWord= a.nextWord()) !=null ){ System.out.println("aWord="+aWord); c.write(aWord+ "\n"); bWord= b.nextWord(); System.out.println("bWord="+bWord); if(bWord!= null){ c.write(bWord+ "\n"); } } //还得考虑a.txt内容读取完,b.txt还有内容没弄完 while((bWord= b.nextWord()) != null){ c.write(bWord+ "\n"); } c.close(); System.out.println("finish"); }catch(Exception e){ e.printStackTrace(); } } } class FileManager{ String[] words =null; int pos = 0; //把文件转换成String类型，然后分割成String[] @SuppressWarnings("resource") public FileManager(String filename,char[] seperators) throws Exception{ File f = new File(filename); FileReader reader = new FileReader(f); //声明一个char数组缓冲区 char[] buf =new char[(int)f.length()]; //char占用两个字节 //调用reader读取，放入char数组中 int len =reader.read(buf); String results = new String(buf,0,len); //声明一个regex表达式null,然后进行赋值 String regex= null; if(seperators.length>1 ){ regex= "" + seperators[0] + "|" + seperators[1]; }else{ regex= "" + seperators[0]; } words =results.split(regex); } public String nextWord(){ if(pos ==words.length) return null; return words[pos++]; } }