java迭代创建文件，并写入内容

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.util.ArrayList;
import java.util.List;


/** * * @author Administrator * *实现内容：迭代创建文件，并写入内容 */
public class MultiThread { 
   

	public static void main(String[] args) throws IOException { 
   
		File file=new File("D:/Users/aa/aaa.txt");
		if(!file.getParentFile().exists()){ 
   
			file.getParentFile().mkdirs();
			if(file.exists()){ 
   
				file.delete();
			}
			file.createNewFile();
		}
		OutputStreamWriter writer=new OutputStreamWriter(new FileOutputStream(file),"utf-8");
		writer.append("We");
		writer.close();
		
	}

}