删除指定文件，重新创建并写入指定的内容

public static void write(String path,String content){
    File file = delFile(path);


    FileOutputStream out = null;
    try {
        out=new FileOutputStream(file,true);
        out.write(content.getBytes("utf-8"));
    } catch (Exception e) {
        e.printStackTrace();
    }finally{
        try {
            out.close();
        } catch (IOException e) {
            // TODO Auto-generated catch block  e.printStackTrace();
        }

    }



}

/**  * 删除原文件，创建新的文件

 * path 路径和文件名称  * */ public static File delFile(String path){
    File file=new File(path);
    try {
        if(file.exists()&&file.isFile()){
            file.delete();
            file.createNewFile();
        }else{
            file.createNewFile();
        }
    } catch (IOException e) {
        e.printStackTrace();
    }
    return file;

}