文件重命名或替换指定内容

import java.io.BufferedReader;
import java.io.CharArrayWriter;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.util.Scanner;

public class NameUtils {

    public static void main(String[] args) throws IOException {

        System.out.println("请输入项目名称");
        @SuppressWarnings("resource")
        Scanner sc = new Scanner(System.in);
        String str = sc.nextLine();
        System.out.println("你输入是：" + str);
        String projectName = str;
        String oldName = "city";
        if (str.contains(":")) {
            projectName = str.split(":")[0];
            oldName = str.split(":")[1];
        }
        System.out.println("替换" + oldName + "为" + projectName);
        String projectDir = System.getProperty("user.dir");
        System.out.println("项目路径：" + projectDir);
        File dir = new File(projectDir);
        for (File file : dir.listFiles()) {
            String name = file.getName();
            if (name.contains(oldName)) {
                System.out.println("开始重命名"+name);
                name = name.replace(oldName, projectName);
                String fileName = projectDir+File.separator+ name;
                boolean flag = file.renameTo(new File(fileName));
                System.out.println(fileName + "重命名结果"+flag);
            } else if (name.equals("settings.txt")) {
                System.out.println("开始替换文件内容："+name);
                replacTextContent(file.getAbsolutePath(), oldName, projectName);
                System.out.println("替换文件内容结束："+name);
            }
        }
        System.out.println("开始重命名文件夹："+dir.getAbsolutePath());
        String target = dir.getParent() + File.separator + projectName;
        boolean flag = dir.renameTo(new File(target));
        System.out.println(target + "重命名文件夹结束："+ flag);
    }

    /**
     * 替换文本文件中的字符串
     * 
     * @param path
     * @throws IOException
     */
    public static void replacTextContent(String path, String srcStr, String replaceStr) throws IOException {
        // 读
        File file = new File(path);
        FileReader in = new FileReader(file);
        BufferedReader bufIn = new BufferedReader(in);
        // 内存流, 作为临时流
        CharArrayWriter tempStream = new CharArrayWriter();
        // 替换
        String line = null;
        while ((line = bufIn.readLine()) != null) {
            // 替换每行中, 符合条件的字符串
            line = line.replaceAll(srcStr, replaceStr);
            // 将该行写入内存
            tempStream.write(line);
            // 添加换行符
            tempStream.append(System.getProperty("line.separator"));
        }
        // 关闭 输入流
        bufIn.close();
        // 将内存中的流 写入 文件
        FileWriter out = new FileWriter(file);
        tempStream.writeTo(out);
        out.close();

    }

}